Tonga Climate
When Is the Best Time To Visit Tonga?
The answer to the question of what is the best month to visit Tonga depends on what you are interested in doing during your stay. Here you can see an overview of each month and its typical weather conditions.
Climate of Tonga
The islands of Tonga lie in a humid sub-equatorial climate zone, with the southern islands (Tongatapu group) having a drier climate and slightly higher temperatures. Thermometers here reach up to 28°C, and rainfall oscillates between 1,500 mm - 1,600 mm per year. The northern islands (Vavaʻu group) are cooler and wetter. The average temperature is around 25°C, and rains fluctuate between 2000 mm - 3000 mm. The water surrounding the Kingdom of Tonga keeps the temperature around 23°C - 27°C all year round.
In Tonga, we can distinguish between dry and rainy seasons.
The rainy season lasts from November to April, there is increased rainfall, it is hot and humid, and cyclones can occur.
The dry season from May to October brings slightly lower temperatures and occasional rains. It is then sunny and warm.
Wednesday 17 SepUpdate 2025-09-16 02:30 CET. Powered by Visual Crossing Weather.
Humidity
66%Cloud cover
21%Wind speed
21.5 mphChance of rain
26%Thursday 18 SepUpdate 2025-09-16 02:30 CET. Powered by Visual Crossing Weather.
Humidity
68%Cloud cover
33%Wind speed
26.6 mphChance of rain
48%Friday 19 SepUpdate 2025-09-16 02:30 CET. Powered by Visual Crossing Weather.
Humidity
66%Cloud cover
56%Wind speed
23.7 mphChance of rain
45%Saturday 20 SepUpdate 2025-09-16 02:30 CET. Powered by Visual Crossing Weather.
Humidity
61%Cloud cover
64%Wind speed
19.9 mphChance of rain
23%Sunday 21 SepUpdate 2025-09-16 02:30 CET. Powered by Visual Crossing Weather.
Humidity
64%Cloud cover
84%Wind speed
23.2 mphChance of rain
39%Climate and Average Weather in Tonga
General weather conditions each month by city.
Weather Map
The icons next to the month name indicate the convenience of the date for visiting the selected area/territory/ country. They are only a suggestion and should not be used as the final criterion for selecting your travel date. The season is defined as the time period with the weather favorable for sightseeing (or sunbathing - small island countries) for the average tourist. For countries with a large geographical range, the most touristic places were included.