Climate Insights for Avarua

The climate in Avarua is warm and mild. The average annual temperature is 24°C and approximately 1707mm of precipitation falls per year. Avarua receives a notable amount of rainfall throughout the year, including during its driest month. Avarua is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: March, February, January. The coldest months are August, September, July, when temperatures can drop to 22°C.

Avarua has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is March, when average highs reach 27°C and the mean temperature sits around 26°C. August is the coolest month, with minimum temperatures around 22°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.

Avarua is a fairly wet location, receiving approximately 1707mm of precipitation annually, which averages out to around 142mm per month. The wettest month is March, averaging 229mm of rainfall. February and January also tend to see above-average precipitation. The driest month is June, with just 74mm. That's 155mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Avarua is moderately windy, with an average annual wind speed of 29km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 31km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in March, with average winds dropping to 25km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 30km/h in winter, 30km/h in spring, 28km/h in summer, 28km/h in autumn.

It is currently autumn in Avarua, which began on March 20, 2026. Avarua is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in March at around 27°C, while the coldest stretch bottoms out in August near 22°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Avarua is during June, July, September and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 82mm per month. By contrast, March can be uncomfortably hot with highs reaching 27°C, while August is the coldest period with lows dropping to 22°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Avarua based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.