SeasonMapCook Islands in August
August is Cook Islands's 4th-best month (rank 4 of 12): its 3 destinations average 82/100, led by Aitutaki at 88 — 25°C and 13 rainy days — while Rarotonga is cooler at 22°C and scores 79.
#4 of 12 months for Cook Islands · 3 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Cook Islands in August
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Aitutaki | Island | 25°C | 56 mm · 13 days | 88 tier A | Yes |
| 2 | Avarua | Island | 24°C | 121 mm · 12 days | 79 tier B | — |
| 3 | Rarotonga | Island | 22°C | 121 mm · 12 days | 79 tier B | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means August is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Cook Islands in August
- Humpback whale season · Aitutaki and 2 more places · 15 Jul – 15 Oct (usually)
- Te Maeva Nui · Aitutaki and 2 more places · 25 Jul – 4 Aug
Seasons in force
Peak crowds at 2 of Cook Islands's 3 well-known places this month.