Tonga islands climate is tropical maritime. The climate of the islands can be easily divided into two distinct seasons: a cooler and less rainy season between May and November, and a warmer and rainy season between December and April. In the capital Nuku’alofa average maximum temperatures varies between 29°C in January and 24°C in August, the average minimum varies between 23°C in February and 18°C in August.
The rains are more abundant between December and March. March and February are the wettest months ever, the average annual precipitation is 1,600 mm in Tongatapu island and in the group of Haapai islands, while it is 2,200 mm in Vava’u and 2,600 mm in Niuatoputapu. In Tonga do not have a true dry season. In the capital Nukualofa there is an average of 134 days of rain per year, distributed between 10 and 14 days of rain per month. The average annual humidity is around 75%.
The months between December and April are the months in which the islands can get the tropical storms, the most northern islands, which are nearest the equator, are more at risk with regard to hurricanes.
The temperature of the sea around the island of Tongatapu varies between 23 ° C and 27 ° C.
WHEN TO GO TO TONGA
The best time for a trip to the islands of Tonga are the relatively dry and cool months between May and November.
TONGA CLIMATE TABLES
|NUKU’ALOFA, TONGATAPU (4 metres)|
|Month||Average low (°C)||Average high (°C)||Precip. (mm)||Precip. days|
|Month||Sea Water Temperature °C|
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