Ascension Island weather in August 2025

Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Ascension Island in August. Check more long-term weather averages for Ascension Island in August before you book your next holiday to St Helena & Islands in 2025/2026.

  • 26°C maximum daytime temperature in August in Ascension Island26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 20 days with some rainfall in August in Ascension Island20
    20 days with some rainfall
  • 23°C minimum night-time temperature in August in Ascension Island23
    23°C min night temperature
  • 12 hours of daylight per day in August in Ascension Island12
    12 hours of daylight per day
  • Low heat & humidity in August in Ascension IslandL
    Low heat & humidity
  • 28 mm monthly rainfall in August in Ascension Island28
    28 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in August in Ascension Island11
    11 (Extreme) UV index
  • 25°C sea temperature in August in Ascension Island25
    25°C sea temperature

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The August weather guide for St Helena & Islands (Ascension Island) 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.

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

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How hot is it in Ascension Island in August?

Daytime temperatures usually reach 26°C in Ascension Island in August with low heat and humidity, falling to 23°C at night.

How sunny is it in Ascension Island in August?

There are normally 7 hours of bright sunshine each day in Ascension Island in August - that's 59% of daylight hours.

How warm is the sea around Ascension Island in August?

The average sea temperature around Ascension Island in August is 25°C.

Does it ever rain in Ascension Island in August?

There are usually 20 days with some rain in Ascension Island in August and the average monthly rainfall is 28mm.

Ascension Island August sunrise & sunset times

Browse the sunrise and sunset times for Ascension Island in August 2025. Select a month to view Ascension Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 07:11 18:57
Saturday, 16th August 2025 07:06 18:58
Sunday, 31st August 2025 06:59 18:56

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