August in Avarua sees daytime temperatures around 25°C (77°F) and lows of 22°C (72°F) at night. With around 80 mm (3.1 in) of rainfall expected, it's worth packing a rain jacket.
If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.
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Pick a month to see the average temperature, rainfall and sunshine in Avarua - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Avarua typically stay consistent throughout August, with daily highs averaging around 25°C (77°F). Nights are warm, with lows around 20°C (68°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Avarua spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 50 years of weather records for Avarua, the following extremes were recorded between 1976 and 2026.
Find out more about the weather in the Cook Islands and which places have the best travel conditions in this month. See all of the Cook Islands in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Avarua climate overview or explore weather in the Cook Islands.
Where to go in August - average daytime high across popular destinations.
Penrhyn
29°C (84°F) Aitutaki
26°C (79°F) Arutanga26°C (79°F) Muri25°C (77°F) Avarua25°C (77°F) Arorangi25°C (77°F) Rarotonga25°C (77°F) Ngatangiia25°C (77°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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