March weather forecast
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.

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• Jamestown - March »
  March is the month when Jamestown, Saint Helena, Ascension and Tristan da Cunha, experiences its warmest temperatures, averaging a high of 28°C (82.4°F) and a low of 22°C (71.6°F). On the first day of March in Jamestown sunrise is at 06:23 and sunset at 18:47.
• Georgetown - March »
  In Georgetown the average sunshine duration in March is 8.1h. In March, in Georgetown the rain falls for 9.3 days.
• Longwood - March »
  In Longwood in March, during 12.5 rainfall days, 8mm (0.31") of precipitation is typically accumulated. The average relative humidity in March in Longwood is 78%.
• Tristan da Cunha - March »
  The months with the warmest seawater in Tristan da Cunha are February and March, with an average sea temperature of 18°C (64.4°F). The advent of March in Tristan da Cunha brings an average high-temperature of a still agreeable 20°C (68°F), exhibiting minor difference from the previous month.
• Ascension Island - March »
  March through May, with an average sea temperature of 28°C (82.4°F), are months with the warmest seawater in Ascension Island, Saint Helena, Ascension and Tristan da Cunha. In Ascension Island in March, it is raining for 3 days, with typically 18mm (0.71") of accumulated precipitation.
• Saint Helena Island - March »
  In Saint Helena Island the average seawater temperature in March is 25°C (77°F). In March, in Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha, the rain falls for 15 days.