Tonga — Vavau
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Best conditions around February 9
Whale-watch sailing in protected island group.
Best time to sail
Best time to sail in Tonga
Sailing works year-round in Tonga, with conditions at their best in May and June.
That verdict comes from 1991–2020 climate normals — wind, rain, sunshine, and air temperature — scored week by week for charter conditions across 1 sailing area.
Sailing conditions in Tonga, month by month
Mean weekly values across our sailing areas in Tonga. The sail score weighs wind, rain, sun, and temperature — and discounts tropical-storm season where one applies.
Temperature (°C)
- Air
- Water
Wind (kn)
Rain (mm/day)
Sun (h/day)
| Month | Sail score | Wind (kn) | Rain (mm/day) | Sun (h/day) | Temp (°C) | Water (°C) |
|---|---|---|---|---|---|---|
| January | Excellent | 12 | 8.3 | 12 | 27 | 29 |
| February | Excellent | 12 | 7.6 | 12 | 27 | 29 |
| March | Excellent | 11 | 6.8 | 12 | 27 | 28 |
| April | Excellent | 12 | 5.5 | 12 | 26 | 28 |
| May | Excellent | 14 | 3.5 | 12 | 25 | 27 |
| June | Excellent | 14 | 2.3 | 12 | 25 | 26 |
| July | Excellent | 14 | 2.3 | 12 | 24 | 26 |
| August | Excellent | 14 | 3 | 12 | 24 | 25 |
| September | Excellent | 14 | 3.3 | 12 | 24 | 25 |
| October | Excellent | 14 | 3.5 | 12 | 25 | 26 |
| November | Excellent | 13 | 4 | 12 | 25 | 27 |
| December | Excellent | 12 | 5.3 | 12 | 26 | 27 |
Sailing areas in Tonga
Every area below is scored individually in the interactive calendar; where we have an in-depth guide, it's linked.
Frequently asked questions
When is the best time to sail in Tonga?
Sailing works year-round in Tonga; May and June scores best for wind, rain, sunshine, and temperature in the 1991–2020 climate normals.
How warm is it in Tonga in May?
Around 25 °C air temperature on average in May, with about 12 hours of sun a day.
How warm is the water in Tonga in May?
Around 27 °C sea-surface temperature on average in May, based on 2023–2025 marine averages.