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Eua Island, Tonga. Author Boris Johnson. Licensed under the Creative Commons Attribution-Share Alike
Eua Island, Tonga. Author Boris Johnson

Tonga climate: when to go to Tonga

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%.

Atata Island, Tonga. Author Haanofonua. Licensed under the Creative Commons Attribution-Share Alike

Atata Island, Tonga. Author Haanofonua

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
January 22 28 174
February 22 29 189
March 22 28 263
April 21 27 156
May 20 26 102
June 18 25 72
July 17 25 87
August 18 24 108
September 18 25 114
October 19 25 93
November 20 27 114
December 20 27 127
YEAR 1599
TONGATAPU
Month Sea Water Temperature °C
January 27
February 27
March 27
April 27
May 26
June 24
July 24
August 23
September 23
October 24
November 24
December 25
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