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.

Best 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, month by month

best September

Average comfort out of 100 · open a month for where to go in it

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.

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.