St Helena & Islands weather in August 2025

Expect 17°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in St Helena & Islands in August. Check more long-term weather averages for St Helena & Islands in August before you book your next holiday to St Helena & Islands in 2025/2026.

• 17
  17°C max day temperature
• 15
  15 days with some rainfall
• 14
  14°C min night temperature
• 12
  12 hours of daylight per day
• 0
  No heat & humidity
• 68
  68 mm of monthly rainfall
• 9
  9 (Very High) UV index
• 21
  21°C sea temperature

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The August weather guide for St Helena & Islands (St Helena) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top St Helena & Islands destinations

Below are average maximum temperatures at popular countries, regions and places in St Helena & Islands in August. Select a holiday destination to see more weather parameters.

• 26
  Ascension Island
• 17
  St Helena
• 13
  Tristan da Cunha

All St Helena & Islands destinations

• Ascension Island
• St Helena
• Tristan da Cunha

Metric (°C / mm)  |  Imperial (°F / inches)

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St Helena & Islands August sunrise & sunset times

Browse the sunrise and sunset times for St Helena & Islands in August 2025. Select a month to view St Helena & Islands sunrise and sunset times for the next 12 months. The St Helena & Islands sunrise and sunset times shown below are for St Helena.

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