The best time to visit the Cook Islands is during the ‘shoulder’ months of March, April, September and October – the skies are clear and sunny with an average temperature of 28°C (82°F).
For the best weather visit between June and September.
Overall, the Cook Islands is a year-round destination with a pleasant warm tropical climate, although it can rain quite often.
The peak tourist season, from June to August, enjoys an average high of 25°C (77°F).
Seasonal variations are slight: summer from November to April is warm – temperatures range between 23°C and 29°C (73°F – 84°F); winter from May to October is slightly cooler – 21°C to 28°C (70°F – 82°F); and the hot and humid wet season from December to March – averages 29°C (84°F).
Rarotonga is generally the wettest region in the Cook Islands, due to its mountainous interior. However, the coastal areas are generally sunny year round interspersed with brief torrential downpours. The other islands are generally dry.
High season: Late-June through August, and around the Christmas and New Year period, when hotel and airline reservations should be booked in advance.
|Ave Temp (°C)||26||27||27||26||24||24||23||23||23||23||24||25|
|Ave High Temp (°C)||28||29||29||28||27||26||25||25||25||26||27||27|
|Ave Low Temp (°C)||24||24||24||23||22||20||20||20||20||21||22||23|
|Sunshine (Hrs daily)||7||8||8||9||10||11||10||11||12||12||10||8|
|Daylight (Hrs daily)||13||13||12||12||11||11||11||12||12||13||13||13|
|Ave Humidity (%)||85||85||85||85||85||80||80||80||80||80||80||85|
|Days with some Rain||18||17||18||13||9||6||5||3||5||5||6||12|
|Ave Rainfall (mm)||190||190||190||170||140||80||60||70||80||80||130||160|
|Sea Temp (°C)||28||28||28||28||27||27||26||26||26||26||27||27|
Note: Meteorological data is sourced from the United States National Oceanic and Atmospheric Administration (NOAA) and the World Meteorological Organization (WMO).
Latest update: Best time to visit Cook Islands: 11 May, 2022