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Saint Helena, Ascension and Tristan da Cunha

Saint Helena, Ascension and Tristan da Cunha - most visited locations

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Flag of Saint Helena, Ascension and Tristan da Cunha
Flag of Saint Helena, Ascension and Tristan da Cunha

The climate of Saint Helena, Ascension, and Tristan da Cunha

Saint Helena, Ascension, and Tristan da Cunha, collectively known as the British Overseas Territory, occupy a strategically important location in the South Atlantic Ocean. Saint Helena possesses a subtropical highland climate, Ascension Island offers a tropical wet and dry climate, while Tristan da Cunha experiences an oceanic climate. This leads to a variety of weather patterns across the islands.

On Saint Helena, winter seasons are relatively dry with temperatures often fluctuating between 15°C (59°F) to 26°C (78.8°F). However, the summer brings mild and wet weather, where temperatures can reach up to 27°C (80.6°F). Ascension Island, owing to its tropical climate, exhibits wetter conditions between January and April, while the rest of the year remains quite dry. The average temperatures range from 22°C (71.6°F) to 31°C (87.8°F) throughout the year. Tristan da Cunha is characterised by a temperate, wet climate, with temperatures usually ranging from 11°C (51.8°F) to 19°C (66.2°F) and rainfall evenly distributed across the year.

The Best Time to Visit Saint Helena, Ascension, and Tristan da Cunha

Considering the wide-ranging climatic variations, the best time to visit these territories depends on the specific island and the visitor's preferences. For Saint Helena, the dry winter period from April to September can be quite appealing, offering cooler temperatures and less precipitation. Ascension Island is generally suitable for visitation all year round, but if one prefers a dryer climate, May to December should be ideal. For Tristan da Cunha, the summer months between October and April, with temperatures reaching up to 19°C (66.2°F), provide the most comfortable conditions.

The Worst Time to Visit Saint Helena, Ascension, and Tristan da Cunha

Each island has periods of the year that might be less favourable for tourists. On Saint Helena, the rainy summer season, from October to March, can present challenges due to increased precipitation and a slight rise in temperature. Ascension Island's rainy season, from January to April, can be less appealing to some visitors due to the heavy rainfall. The winter period on Tristan da Cunha, from May to September, can be harsh with cold temperatures, high winds, and frequent rainfall, making it less favourable for tourism.

Spring Weather in Saint Helena, Ascension, and Tristan da Cunha

The spring weather across these territories varies greatly due to their distinct climates. On Saint Helena, springtime in September to November sees the onset of the rainy season, with temperatures hovering between 20°C (68°F) to 25°C (77°F). Ascension Island, in its spring months from September to November, experiences drier weather and temperatures ranging from 24°C (75.2°F) to 30°C (86°F). On Tristan da Cunha, spring, from September to November, is relatively cool and wet with temperatures oscillating between 11°C (51.8°F) and 15°C (59°F).

Summer Weather in Saint Helena, Ascension, and Tristan da Cunha

In Saint Helena, summer from December to March is typically warm and wet, with temperatures ranging from 20°C (68°F) to 27°C (80.6°F). Ascension Island experiences a relatively mild summer, from December to February, with less rainfall and temperatures between 24°C (75.2°F) and 30°C (86°F). Tristan da Cunha's summer, from December to February, is moderately warm and wet, with temperatures varying between 13°C (55.4°F) and 19°C (66.2°F).

Autumn Weather in Saint Helena, Ascension, and Tristan da Cunha

Autumn in Saint Helena, from March to May, witnesses a decrease in rainfall and cooler temperatures, ranging from 18°C (64.4°F) to 25°C (77°F). In Ascension Island, the autumn season from March to May brings the onset of the rainy season, with temperatures fluctuating between 24°C (75.2°F) and 31°C (87.8°F). Tristan da Cunha in autumn, from March to May, experiences a decrease in temperatures, ranging from 13°C (55.4°F) to 17°C (62.6°F), with consistent rainfall.

Winter Weather in Saint Helena, Ascension, and Tristan da Cunha

The winter months in Saint Helena, from June to August, are relatively dry with cooler temperatures, ranging from 15°C (59°F) to 26°C (78.8°F). Winter in Ascension Island, from June to August, sees decreased rainfall and cooler temperatures, varying between 22°C (71.6°F) and 29°C (84.2°F). Tristan da Cunha's winter, from June to August, brings cold and wet weather, with temperatures dropping to between 11°C (51.8°F) and 15°C (59°F), and an increase in wind speed and rainfall.

January Weather in Saint Helena, Ascension, and Tristan da Cunha

January, the first month of the year, brings distinctive weather conditions to Saint Helena, Ascension, and Tristan da Cunha.

In Saint Helena, January marks the middle of the summer season. It is generally the warmest month, with temperatures frequently reaching up to 27°C (80.6°F). There is a significant increase in precipitation compared to the dry winter months. In comparison to December, the temperature and rainfall remain relatively constant, while in February, visitors can expect a slight decrease in temperature and rainfall. Jamestown, the capital of Saint Helena, shares these climatic conditions.

Ascension Island, located near the equator, also experiences warm temperatures in January, ranging from 24°C (75.2°F) to 30°C (86°F). However, it is one of the wettest months of the year, due to the beginning of the rainy season. Georgetown, the island's capital, experiences these weather patterns. The weather in January is similar to that of February but presents a notable increase in rainfall compared to the preceding dry month of December.

Tristan da Cunha observes January as the middle of its summer season. However, due to its oceanic climate, temperatures are generally cooler than on the other islands, fluctuating between 14°C (57.2°F) to 19°C (66.2°F). Precipitation remains high in January, which is typical for Tristan da Cunha, given its absence of a defined dry season. As we move to February, rainfall decreases slightly, and temperatures maintain a consistent range. The island's main settlement, Edinburgh of the Seven Seas, follows this weather pattern. January Weather in Saint Helena, Ascension, and Tristan da Cunha »

February Weather in Saint Helena, Ascension, and Tristan da Cunha

February marks the end of the summer season for the islands of Saint Helena, Ascension, and Tristan da Cunha, each with its unique climatic nuances.

In Saint Helena, February continues to experience warm summer temperatures, albeit slightly lower than in January, with ranges from 20°C (68°F) to 26°C (78.8°F). Rainfall is significant, as it is one of the wetter months of the year. The transition from February to March brings about a decrease in both temperature and rainfall as the island moves towards the autumn season. Jamestown, being the capital, reflects these climate conditions.

Ascension Island in February continues to witness high temperatures, similar to January, varying from 24°C (75.2°F) to 30°C (86°F). However, rainfall reduces slightly as compared to the peak wet month of January. Georgetown, the main settlement, aligns with these weather characteristics. As the island transitions into March, the weather remains relatively consistent, although there is a minor increase in precipitation.

Tristan da Cunha, with its temperate oceanic climate, experiences February as one of its warmer months, though the temperatures remain cooler than on the other islands, ranging from 14°C (57.2°F) to 19°C (66.2°F). February also brings a decrease in rainfall compared to January, providing a slightly drier environment. The weather in the main settlement, Edinburgh of the Seven Seas, is consistent with this pattern. As the island moves into March, temperatures begin to decrease, signifying the approach of the autumn season. February Weather in Saint Helena, Ascension, and Tristan da Cunha »

March Weather in Saint Helena, Ascension, and Tristan da Cunha

March brings a transition in the weather across Saint Helena, Ascension, and Tristan da Cunha, as the islands shift from summer to autumn.

In Saint Helena, March sees a decrease in temperature, with ranges from 19°C (66.2°F) to 26°C (78.8°F), signifying the start of the cooler autumn season. Rainfall also starts to reduce as the month progresses, although precipitation remains significant. Jamestown, the capital of Saint Helena, typically experiences these weather patterns. As the island moves from March to April, both temperature and rainfall continue to decrease.

Ascension Island in March experiences temperatures comparable to February, ranging from 24°C (75.2°F) to 30°C (86°F). The island, however, starts to see an increase in rainfall as it transitions into its wetter season. Georgetown, the chief settlement on Ascension Island, aligns with these weather characteristics. The transition into April sees a slight increase in precipitation, while temperatures remain stable.

On Tristan da Cunha, March signifies the onset of autumn. The temperatures in this month fluctuate between 13°C (55.4°F) and 18°C (64.4°F). There's a notable decrease in rainfall compared to February, but precipitation levels remain relatively high due to the island's oceanic climate. Edinburgh of the Seven Seas, the primary settlement, echoes these weather conditions. As the island moves from March to April, a further decrease in temperatures and rainfall can be observed. March Weather in Saint Helena, Ascension, and Tristan da Cunha »

April Weather in Saint Helena, Ascension, and Tristan da Cunha

April ushers in varied weather conditions in Saint Helena, Ascension, and Tristan da Cunha, marking a significant transition towards cooler and drier climates for these islands.

In Saint Helena, April brings further decreases in temperature and rainfall, indicative of the ongoing autumn season. Temperatures typically range from 18°C (64.4°F) to 26°C (78.8°F), and while precipitation is less than the preceding months, some rainfall still occurs. Jamestown, the capital of Saint Helena, mirrors these climatic conditions. The shift from April to May continues the cooling and drying trend, with temperatures and precipitation expected to decrease further.

Ascension Island, on the other hand, experiences a slight increase in rainfall in April, marking the peak of its wet season. However, temperatures remain relatively stable, ranging from 24°C (75.2°F) to 30°C (86°F). Georgetown, the primary settlement on Ascension Island, reflects these weather patterns. Moving into May, there is a noticeable decrease in rainfall, marking the end of the wet season, while temperatures remain steady.

On Tristan da Cunha, April witnesses further decreases in temperature, typically fluctuating between 13°C (55.4°F) and 17°C (62.6°F), as the island transitions deeper into the autumn season. Rainfall remains relatively high but shows a slight decrease compared to March. The weather in Edinburgh of the Seven Seas, the main settlement, is consistent with this pattern. The progression into May brings a further decline in temperatures and a continued reduction in rainfall. April Weather in Saint Helena, Ascension, and Tristan da Cunha »

May Weather in Saint Helena, Ascension, and Tristan da Cunha

May, the fifth month of the year, ushers in cooler temperatures and changing precipitation patterns in the islands of Saint Helena, Ascension, and Tristan da Cunha.

In Saint Helena, May is firmly within the autumn season, which is characterised by decreasing temperatures and less rainfall. The temperatures typically range from 17°C (62.6°F) to 25°C (77°F). The rainfall in May is lower compared to April, with the island gradually moving towards its dry season. The capital, Jamestown, experiences similar weather patterns. Transitioning from May to June, both temperature and precipitation are expected to decrease further, marking the onset of winter.

Ascension Island experiences a significant decrease in rainfall in May, signifying the end of its wet season. Despite this, temperatures remain relatively consistent, ranging from 23°C (73.4°F) to 29°C (84.2°F). Georgetown, the primary settlement on Ascension Island, reflects these weather patterns. Moving into June, a further decrease in rainfall can be expected, while temperatures remain steady.

Tristan da Cunha in May sees temperatures ranging between 12°C (53.6°F) and 16°C (60.8°F), marking a significant cooling as the island heads towards winter. Rainfall continues to be high but shows a slight decrease from April. Edinburgh of the Seven Seas, the main settlement, aligns with these weather conditions. The progression from May to June brings further declines in temperatures and a slight decrease in rainfall. May Weather in Saint Helena, Ascension, and Tristan da Cunha »

June Weather in Saint Helena, Ascension, and Tristan da Cunha

June marks the onset of winter in the islands of Saint Helena, Ascension, and Tristan da Cunha, bringing cooler temperatures and significant changes in precipitation.

In Saint Helena, June is a winter month, characterised by lower temperatures, typically ranging from 15°C (59°F) to 23°C (73.4°F). It also marks the onset of the dry season, with rainfall significantly reduced compared to May. Jamestown, the island's capital, mirrors these weather patterns. The transition from June to July will continue the winter trend with temperatures and rainfall expected to decrease further.

Ascension Island, on the other hand, experiences stable temperatures, even in June, typically ranging from 22°C (71.6°F) to 28°C (82.4°F). The rainfall decreases significantly, marking the middle of its dry season. Georgetown, the main settlement on Ascension Island, aligns with these weather patterns. Moving into July, the weather remains relatively consistent, with a minor decrease in both temperature and rainfall.

On Tristan da Cunha, June is a part of the winter season, with temperatures fluctuating between 11°C (51.8°F) and 15°C (59°F). Despite the cooling, the island experiences high rainfall due to its oceanic climate, although there is a slight decrease from May. The main settlement, Edinburgh of the Seven Seas, shares these weather conditions. As the island progresses into July, further decreases in both temperature and rainfall can be expected. June Weather in Saint Helena, Ascension, and Tristan da Cunha »

July Weather in Saint Helena, Ascension, and Tristan da Cunha

July brings the peak of winter to the islands of Saint Helena, Ascension, and Tristan da Cunha, with varying degrees of cooling and changes in precipitation.

In Saint Helena, July is the coolest month of the year, with temperatures typically ranging from 14°C (57.2°F) to 21°C (69.8°F). Rainfall is minimal, marking the peak of the dry season. The capital, Jamestown, shares these climatic conditions. As the island transitions from July to August, there will be a slight increase in temperatures and rainfall, signaling the end of the dry season.

Ascension Island continues to maintain steady temperatures, even in July, ranging from 22°C (71.6°F) to 28°C (82.4°F). Rainfall is at its lowest, with the dry season in full swing. Georgetown, the island's main settlement, reflects these weather patterns. Moving into August, there is a slight increase in both temperature and rainfall, marking the beginning of the transition to the wetter season.

On Tristan da Cunha, July is the coldest month, with temperatures fluctuating between 10°C (50°F) and 14°C (57.2°F). Despite this cooling, the island experiences significant rainfall, albeit slightly less than in June due to its oceanic climate. The main settlement, Edinburgh of the Seven Seas, experiences similar weather conditions. Transitioning into August, temperatures and rainfall begin to increase gradually, signifying the end of the peak winter season. July Weather in Saint Helena, Ascension, and Tristan da Cunha »

August Weather in Saint Helena, Ascension, and Tristan da Cunha

August brings a transitional period to the islands of Saint Helena, Ascension, and Tristan da Cunha, as they move from the peak of winter towards the early onset of spring, with shifts in temperature and precipitation.

In Saint Helena, August sees a slight rise in temperatures compared to July, typically ranging from 14°C (57.2°F) to 22°C (71.6°F), signalling the gradual end of winter. Rainfall also increases slightly, marking the end of the dry season. The capital, Jamestown, experiences these weather patterns. As the island transitions from August to September, both temperatures and rainfall are expected to increase further, indicating the onset of spring.

On Ascension Island, August experiences a minor increase in temperatures, ranging from 22°C (71.6°F) to 29°C (84.2°F). Rainfall also starts to increase, marking the end of the dry season. Georgetown, the island's main settlement, mirrors these weather conditions. Moving into September, there is an expected increase in both temperature and rainfall as the island heads towards the wet season.

Tristan da Cunha in August experiences slightly warmer temperatures than in July, typically fluctuating between 11°C (51.8°F) and 15°C (59°F). Rainfall increases slightly compared to July, marking a departure from the peak winter season. The weather in the main settlement, Edinburgh of the Seven Seas, aligns with this pattern. As the island moves from August to September, a further rise in both temperatures and rainfall can be expected, indicating the arrival of the spring season. August Weather in Saint Helena, Ascension, and Tristan da Cunha »

September Weather in Saint Helena, Ascension, and Tristan da Cunha

September brings the onset of spring to the islands of Saint Helena, Ascension, and Tristan da Cunha, heralding warmer temperatures and changes in precipitation patterns.

In Saint Helena, September is characterised by rising temperatures, typically ranging from 15°C (59°F) to 23°C (73.4°F), as the island transitions fully into the spring season. Rainfall continues to increase compared to August, signalling a departure from the dry season. The capital, Jamestown, reflects these climate patterns. As the island moves from September to October, both temperatures and rainfall are expected to increase further.

On Ascension Island, September sees a slight rise in temperatures, with values typically ranging from 23°C (73.4°F) to 30°C (86°F). Rainfall also increases compared to August, marking a transition towards the wet season. Georgetown, the main settlement on Ascension Island, experiences similar weather conditions. As the island progresses into October, both temperatures and rainfall are expected to increase.

Tristan da Cunha in September witnesses a rise in temperatures, typically fluctuating between 11°C (51.8°F) and 16°C (60.8°F). Rainfall decreases slightly compared to August, yet it remains significant due to the island's oceanic climate. Edinburgh of the Seven Seas, the main settlement, aligns with these weather conditions. Transitioning from September to October, a further increase in temperature is expected, while rainfall remains relatively consistent. September Weather in Saint Helena, Ascension, and Tristan da Cunha »

October Weather in Saint Helena, Ascension, and Tristan da Cunha

October brings further progress in the spring season to the islands of Saint Helena, Ascension, and Tristan da Cunha, with continued warming temperatures and variations in precipitation.

In Saint Helena, October sees an increase in temperatures, typically ranging from 16°C (60.8°F) to 24°C (75.2°F), marking the heart of the spring season. Rainfall also increases compared to September, bringing about lush greenery throughout the island. The capital, Jamestown, reflects these climatic conditions. As the island moves from October to November, temperatures are expected to increase further, and rainfall will begin to taper off.

Ascension Island in October experiences an increase in temperatures, typically fluctuating from 24°C (75.2°F) to 31°C (87.8°F). Rainfall also continues to rise compared to September, indicating the progression into the wet season. Georgetown, the main settlement on Ascension Island, aligns with these weather patterns. Moving into November, there will be a slight rise in both temperature and rainfall.

On Tristan da Cunha, October sees temperatures ranging between 12°C (53.6°F) and 17°C (62.6°F), marking a significant warming trend. Rainfall remains high due to the island's oceanic climate, although there is a slight decrease compared to September. Edinburgh of the Seven Seas, the main settlement, echoes these weather conditions. As the island transitions into November, a minor increase in temperature is expected, while rainfall is expected to remain relatively consistent. October Weather in Saint Helena, Ascension, and Tristan da Cunha »

November Weather in Saint Helena, Ascension, and Tristan da Cunha

November brings the late stages of spring to the islands of Saint Helena, Ascension, and Tristan da Cunha, with temperatures continuing to rise and varying changes in precipitation.

In Saint Helena, November sees temperatures typically ranging from 18°C (64.4°F) to 25°C (77°F). The island is in full bloom with the ongoing spring season. Rainfall decreases compared to October, indicating a transition towards the drier summer months. Jamestown, the capital, experiences these climatic patterns. As the island transitions from November to December, there will be a slight increase in temperature and a further decrease in rainfall, marking the beginning of the summer season.

On Ascension Island, November experiences a rise in temperatures, typically between 25°C (77°F) and 31°C (87.8°F). Rainfall increases compared to October, indicating the peak of the wet season. Georgetown, the island's main settlement, aligns with these weather conditions. Moving into December, both temperature and rainfall are expected to remain relatively stable.

On Tristan da Cunha, November sees temperatures ranging from 13°C (55.4°F) to 18°C (64.4°F), marking a further warming trend. Rainfall continues to be significant due to the island's oceanic climate, although there is a slight decrease compared to October. Edinburgh of the Seven Seas, the main settlement, experiences similar weather conditions. Transitioning into December, there will be a slight increase in temperature, while rainfall is expected to remain relatively consistent. November Weather in Saint Helena, Ascension, and Tristan da Cunha »

ecember Weather in Saint Helena, Ascension, and Tristan da Cunha

December marks the onset of summer on the islands of Saint Helena and Tristan da Cunha, while on Ascension Island, it signifies the continuation of its wet season. This transition brings forth warmer temperatures and changes in precipitation across these islands.

In Saint Helena, December brings temperatures typically ranging from 19°C (66.2°F) to 26°C (78.8°F), marking the start of the warmest time of the year. Rainfall decreases compared to November, indicating the dry summer season is in full swing. These climatic conditions are mirrored in the island's capital, Jamestown. As the island transitions from December to January, the temperatures are expected to remain steady while the rainfall continues to decrease, maintaining the summer trend.

On Ascension Island, December sees stable temperatures, typically between 25°C (77°F) and 31°C (87.8°F), even as the rainfall remains significant, maintaining the wet season. Georgetown, the island's main settlement, shares these weather patterns. Moving into January, there is a slight decrease in both temperature and rainfall as the island starts transitioning towards its dry season.

On Tristan da Cunha, December sees temperatures ranging from 14°C (57.2°F) to 19°C (66.2°F), marking a slight increase in warmth. However, the island's oceanic climate means rainfall remains substantial, albeit with a minor decrease compared to November. Edinburgh of the Seven Seas, the main settlement, echoes these weather conditions. As the island transitions into January, temperatures are expected to peak while rainfall is expected to slightly decrease.

Weather in January

January, the first month of the year, brings distinctive weather conditions to Saint Helena, Ascension, and Tristan da Cunha. In Saint Helena, January marks the middle of the summer season. It is generally the warmest month, with temperatures frequently reaching up to 27°C (80.6°F). Weather in January »

Weather in February

February marks the end of the summer season for the islands of Saint Helena, Ascension, and Tristan da Cunha, each with its unique climatic nuances. In Saint Helena, February continues to experience warm summer temperatures, albeit slightly lower than in January, with ranges from 20°C (68°F) to 26°C (78.8°F). Weather in February »

Weather in March

March brings a transition in the weather across Saint Helena, Ascension, and Tristan da Cunha, as the islands shift from summer to autumn. In Saint Helena, March sees a decrease in temperature, with ranges from 19°C (66.2°F) to 26°C (78.8°F), signifying the start of the cooler autumn season. Weather in March »

Weather in April

April ushers in varied weather conditions in Saint Helena, Ascension, and Tristan da Cunha, marking a significant transition towards cooler and drier climates for these islands. In Saint Helena, April brings further decreases in temperature and rainfall, indicative of the ongoing autumn season. Weather in April »

Weather in May

May, the fifth month of the year, ushers in cooler temperatures and changing precipitation patterns in the islands of Saint Helena, Ascension, and Tristan da Cunha. In Saint Helena, May is firmly within the autumn season, which is characterised by decreasing temperatures and less rainfall. Weather in May »

Weather in June

June marks the onset of winter in the islands of Saint Helena, Ascension, and Tristan da Cunha, bringing cooler temperatures and significant changes in precipitation. In Saint Helena, June is a winter month, characterised by lower temperatures, typically ranging from 15°C (59°F) to 23°C (73.4°F). Weather in June »

Weather in July

July brings the peak of winter to the islands of Saint Helena, Ascension, and Tristan da Cunha, with varying degrees of cooling and changes in precipitation. In Saint Helena, July is the coolest month of the year, with temperatures typically ranging from 14°C (57.2°F) to 21°C (69.8°F). Weather in July »

Weather in August

August brings a transitional period to the islands of Saint Helena, Ascension, and Tristan da Cunha, as they move from the peak of winter towards the early onset of spring, with shifts in temperature and precipitation. In Saint Helena, August sees a slight rise in temperatures compared to July, typically ranging from 14°C (57.2°F) to 22°C (71.6°F), signalling the gradual end of winter. Weather in August »

Weather in September

September brings the onset of spring to the islands of Saint Helena, Ascension, and Tristan da Cunha, heralding warmer temperatures and changes in precipitation patterns. In Saint Helena, September is characterised by rising temperatures, typically ranging from 15°C (59°F) to 23°C (73.4°F), as the island transitions fully into the spring season. Weather in September »

Weather in October

October brings further progress in the spring season to the islands of Saint Helena, Ascension, and Tristan da Cunha, with continued warming temperatures and variations in precipitation. In Saint Helena, October sees an increase in temperatures, typically ranging from 16°C (60.8°F) to 24°C (75.2°F), marking the heart of the spring season. Weather in October »

Weather in November

November brings the late stages of spring to the islands of Saint Helena, Ascension, and Tristan da Cunha, with temperatures continuing to rise and varying changes in precipitation. In Saint Helena, November sees temperatures typically ranging from 18°C (64.4°F) to 25°C (77°F). Weather in November »

Weather in December


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Saint Helena, Ascension and Tristan da Cunha

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