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Monthly water temperature across Tonga's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
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Water temperature around Tonga ranges from about 25°C in July to 28°C in March, based on satellite sea-temperature data for its dive sites.
In the warm season (about 28°C) a rash guard or 3mm shorty is comfortable in Tonga; in the coldest months (about 25°C) step up to a 3mm full suit.
Fin maps 8 sites in Tonga (8 scuba diving sites and 2 snorkelling spots, with some suited to both).
Across Tonga's dive sites, May, June, July, August, September and October are most often reported as the best months to visit.
