SeasonMapBest time to visit Cook Islands
The best time to visit Cook Islands is September to November, when its 3 destinations average 86/100 for climate comfort — May is the weakest month, at 73/100.
Updated September 2026 · averaged over 3 Cook Islands destinations · climate normals from ERA5 reanalysis
Cook Islands climate comfort by month
| Month | Comfort | Avg high | Rain | Pick of the month |
|---|---|---|---|---|
| January | 75 | 28.1°C | 214 mm | Rarotonga 78 |
| February | 73 | 28.3°C | 245 mm | Rarotonga 74 |
| March | 77 | 28.6°C | 193 mm | Aitutaki 80 |
| April | 79 | 27.8°C | 144 mm | Rarotonga 81 |
| May | 73 | 26.7°C | 176 mm | Avarua 74 |
| June | 83 | 25.7°C | 76 mm | Avarua 83 |
| July | 81 | 25.1°C | 90 mm | Aitutaki 84 |
| August | 83 | 24.8°C | 89 mm | Aitutaki 87 |
| September | 86 | 25.3°C | 79 mm | Aitutaki 86 |
| October | 84 | 25.4°C | 114 mm | Avarua 84 |
| November | 85 | 26.3°C | 105 mm | Avarua 87 |
| December | 76 | 27.3°C | 211 mm | Rarotonga 79 |
Comfort is SeasonMap's 0–100 score, averaged across every Cook Islands destination in the dataset. Each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. Averages from ERA5 reanalysis normals, not forecasts.
Cook Islands month by month
All 3 destinations in Cook Islands
Cook Islands — FAQ
- When is the best time to visit Cook Islands?
- September to November. Across Cook Islands's 3 destinations, September averages 86/100 for climate comfort with mean highs of 25.3°C and 79 mm of rain.
- What is the worst month to visit Cook Islands?
- May, averaging 73/100 — mean highs of 26.7°C and 176 mm of rain across the country's destinations.
- What is the hottest month in Cook Islands?
- March, with mean daily highs of 28.6°C averaged across 3 destinations.
- What is the wettest month in Cook Islands?
- February, averaging 245 mm of rain.