April weather forecast
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.

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• Jamestown - April »
  Moving into the autumn season, April ushers in a noticeable decline in temperatures and rainfall in Jamestown, Saint Helena, Ascension, and Tristan da Cunha. With April's weather parameters, temperatures can reach as high as 27°C (80.6°F), the month also records a rainfall of 10mm (0.39") and a decrease in daylight to 11.7 hours.
• Georgetown - April »
  The warmest period in Georgetown is April, when temperatures fluctuate between an average high of 27.3°C (81.1°F) and a low of 26.2°C (79.2°F). The average relative humidity in April in Georgetown is 77%.
• Longwood - April »
  In April, the average high-temperature and low-temperature in Longwood are 24.2°C (75.6°F) and 23.1°C (73.6°F) respectively. In April, the average sunshine duration in Longwood is 6.6h.
• Tristan da Cunha - April »
  April, the first month of autumn in Tristan da Cunha marks the diminishing intensity of sunlight with both daylight and sunshine hours recording a declining trend. In Tristan da Cunha, Saint Helena, Ascension and Tristan da Cunha, in April, it is raining for 20 days, with typically 129mm (5.08") of accumulated precipitation.
• Ascension Island - April »
  March and April, with an average of 8.9h of sunshine, are months with the most sunshine in Ascension Island, Saint Helena, Ascension and Tristan da Cunha. In Ascension Island the average sunshine duration in April is 8.9h.
• Saint Helena Island - April »
  In Saint Helena Island the average seawater temperature in April is 25°C (77°F). February through April, with an average sea temperature of 25°C (77°F), are months with the warmest seawater in Saint Helena Island.