SeasonMapTonga in September
September is Tonga's best month (rank 1 of 12): its 2 destinations average 86/100, led by Vava'u at 87 — 28°C and 10 rainy days — while Nuku'alofa trails at 84 with 91 mm of rain.
#1 of 12 months for Tonga · 2 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Tonga in September
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Vava'u | Island | 28°C | 77 mm · 10 days | 87 tier A | Yes |
| 2 | Nuku'alofa | Island | 27°C | 91 mm · 11 days | 84 tier A | Yes |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Tonga in September
- Humpback whales · Vava'u · 1 Jul – 15 Oct (usually)
- Humpback season · Nuku'alofa · 1 Jul – 31 Oct (usually)