Cook Islands weather in August 2025

Expect 77°F daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Cook Islands in August. Check more long-term weather averages for Cook Islands in August before you book your next holiday to Cook Islands in 2025/2026.

  • 77°F maximum daytime temperature in August in Cook Islands (Avarua)77
    77°F max day temperature
  • 3 days with some rainfall in August in Cook Islands (Avarua)3
    3 days with some rainfall
  • 66°F minimum night-time temperature in August in Cook Islands (Avarua)66
    66°F min night temperature
  • 11 hours of daylight per day in August in Cook Islands (Avarua)11
    11 hours of daylight per day
  • Low heat & humidity in August in Cook Islands (Avarua)L
    Low heat & humidity
  • 6.0 inches monthly rainfall in August in Cook Islands (Avarua)6.0
    6.0 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Cook Islands (Avarua)8
    8 (Very High) UV index
  • 75°F sea temperature in August in Cook Islands (Avarua)75
    75°F sea temperature

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The August weather guide for Cook Islands (Avarua) 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 Cook Islands destinations

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

All Cook Islands destinations

Metric (°C)  |  Imperial (°F)

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How hot is it in the Cook Islands in August?

Daytime temperatures usually reach 77°F in Avarua, Cook Islands in August with low heat and humidity, falling to 66°F at night.

How warm is the sea around the Cook Islands in August?

The average sea temperature around Avarua, Cook Islands in August is 75°F.

Does it ever rain in the Cook Islands in August?

There are usually 3 days with some rain in Avarua, Cook Islands in August and the average monthly rainfall is 6.0 inches.

Cook Islands August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 07:10 18:21
Saturday, 16th August 2025 07:01 18:26
Sunday, 31st August 2025 06:49 18:30

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