Mild
Average highs are around 26°C, so days are mild rather than hot.
Weather Guide
Rarotonga, Cook Islands Average Monthly Weather
Weather score71Very good annual avg
Best months: October, September, November
Across the year, average daytime temperatures are around 28°C, sunshine averages 0h per day, and rainfall totals about 1607mm. Sea temperatures average 26°C across the year.
Annual weather
Annual averages
Temp
28°C
Rain
1607mm
Annual total
Sun
0h
Sea
26°C
Weather score
71
Very good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 63mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Rarotonga, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August26°C average high
August is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsJanuary to April and November to December
This stretch sets the upper range for average daytime heat.
Rain
August63mm average rain
August is one of Rarotonga's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August0 hours average sun
August is close to Rarotonga's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
August24°C average sea
August is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
Weather score
August75 weather score
August sits close to Rarotonga's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune and August to November
These months have the strongest weather score in the monthly averages.