Weather by month for central Tonga, the best months to go and how Tonga's regions differ, scored from 10 years of climate data.
Jun, Jul, Aug, Sep
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 24°C to 25°C · 7–10 rain days
Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Still good weather, just not quite the top months.
Highs 25°C to 28°C · 11–20 rain days
Weather by month
Average highs and lows, rain days, sunshine and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Score |
|---|---|---|---|---|
| January | 27°C / 26°C | 19 days (233 mm) | 10.4 h/day | 6.3/10 |
| February | 28°C / 26°C | 20 days (299 mm) | 9.6 h/day | 6.2/10 |
| March | 27°C / 26°C | 20 days (254 mm) | 9.3 h/day | 6.3/10 |
| April | 27°C / 26°C | 12 days (152 mm) | 9.6 h/day | 7.1/10 |
| May | 26°C / 25°C | 12 days (127 mm) | 9.4 h/day | 7.6/10 |
| Best month: June | 25°C / 24°C | 9 days (102 mm) | 9.1 h/day | 8.2/10 |
| Best month: July | 24°C / 23°C | 7 days (68 mm) | 9.2 h/day | 8.5/10 |
| Best month: August | 24°C / 23°C | 9 days (85 mm) | 9.1 h/day | 8.2/10 |
| Best month: September | 24°C / 23°C | 10 days (80 mm) | 9.9 h/day | 8.0/10 |
| October | 25°C / 24°C | 11 days (144 mm) | 10.2 h/day | 7.9/10 |
| November | 26°C / 25°C | 11 days (84 mm) | 11.3 h/day | 7.9/10 |
| December | 27°C / 25°C | 16 days (158 mm) | 10.9 h/day | 6.7/10 |
Figures for central Tonga; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
27°C / 26°C · 19 rain days · 10.4 h sun
Expect a high of 27.4°C and rain on about 19 days, with 233mm falling for the month. It's hot and humid cyclone-season weather, with New Year's Day marking the start. The score rates this a good month, not the best, mainly because of the heavy rain frequency.
28°C / 26°C · 20 rain days · 9.6 h sun
This is the wettest month, with 299mm of rain over roughly 20 days and a high of 27.7°C. Sun hours drop to 9.6, the lowest of the year alongside March. It scores as a good month, still within cyclone season.
27°C / 26°C · 20 rain days · 9.3 h sun
Temperatures stay warm at a 27.4°C high, with rain on about 20 days and 254mm total. This is one of the cloudiest months, with only 9.3 hours of sun a day. The verdict is good, as cyclone-season rain keeps the score below the year's best.
27°C / 26°C · 12 rain days · 9.6 h sun
Rain eases to 12 days and 152mm, while the high dips slightly to 26.9°C. Good Friday and Easter Monday fall this month in 2026. The score rises to 7.1, a good month as the wet season winds down.
26°C / 25°C · 12 rain days · 9.4 h sun
With only 12 rain days and 127mm of rainfall, May marks the start of Tonga's drier, cooler season. The high sits at 25.8°C, comfortable for most activities. The score climbs to 7.6, the first month rated best.
25°C / 24°C · 9 rain days · 9.1 h sun
June brings drier air, just 9 rain days and 102mm of rain, with a high of 24.9°C. Emancipation Day falls on June 4. The score reaches 8.2, placing June among the best months to visit.
24°C / 23°C · 7 rain days · 9.2 h sun
July is the driest month, with only 7.3 rain days and 68mm of rain, and a high of 24.1°C. The King's Birthday holiday falls on July 4. It scores 8.5, the top-rated month of the year.
24°C / 23°C · 9 rain days · 9.1 h sun
Dry conditions continue with 8.9 rain days and 85mm of rain, and a high of 23.7°C, the coolest of the year. Sunshine holds steady at 9.1 hours a day. The score stays strong at 8.2, another best-rated month.
24°C / 23°C · 10 rain days · 9.9 h sun
Rain picks up slightly to 9.9 days and 80mm, with a high of 24°C and improving sun hours at 9.9. The Crown Prince's Birthday is marked on September 17. September scores 8.0, still a best month.
25°C / 24°C · 11 rain days · 10.2 h sun
October sees 10.6 rain days and 144mm of rain, with the high climbing to 24.7°C and sunshine up to 10.2 hours. This remains a best-rated month at 7.9, as drier season conditions linger.
26°C / 25°C · 11 rain days · 11.3 h sun
November offers 11.3 hours of sun, the most of the year, with just 10.5 rain days and 84mm of rain. The high reaches 25.6°C and Constitution Day falls on November 4. It scores 7.9, another best month before the wet season returns.
27°C / 25°C · 16 rain days · 10.9 h sun
Rain increases again to nearly 16 days and 158mm, with the high back up to 26.7°C as the wet season begins. Christmas Day and the King George Tubou I Coronation anniversary both fall this month. The score drops to 6.7, a good but not top-rated month.
By trip type
City sightseeing
June to September are the driest months for exploring Tonga's towns, with rain falling on only 7 to 9 days a month and highs of 24 to 25°C. Walking around Nuku'alofa is more comfortable without the heavier rain seen from December to March.
Hiking & nature
June through September is the best stretch for hiking, with lows of 23 to 24°C and rain on just 7.3 to 9.9 days a month. Trails stay drier than in the wetter months, when over 230mm of rain can fall.
Events calendar
Public holidays: New Year's Day (1 Jan)
Public holidays: Good Friday (3 Apr), Easter Monday (6 Apr)
Public holidays: Emancipation Day (4 Jun)
Public holidays: Birthday of the reigning Sovereign of Tonga (4 Jul)
Public holidays: Birthday of the Heir to the Crown of Tonga (17 Sep)
Public holidays: Constitution Day (4 Nov)
Public holidays: Anniversary of the Coronation of H.M. King George Tubou I (4 Dec), Christmas Day (25 Dec), Christmas Day (26 Dec)
Keep planning
FAQ
Yes, August scores 8.2 out of 10 and is one of the four best months. Daytime highs reach 23.7°C and lows drop to 22.5°C, making it the coolest month of the year. It only rains on about 8.9 days with 85mm total, and you get 9.1 hours of sunshine a day, so skies stay mostly clear.
Yes, July is the top-scoring month at 8.5 out of 10. It's the driest month, with just 7.3 rain days and 68mm of rainfall. Temperatures stay mild, with highs of 24.1°C and lows of 22.9°C, and 9.2 hours of sun daily.
January scores 6.3 out of 10, which still counts as good but is lower than mid-year months. It's much wetter, with 19.1 rain days and 233mm of rain, plus warmer temperatures averaging a high of 27.4°C. Sunshine hours are also lower, at 10.4 a day, because of more cloud cover from rain.
December scores 6.7 out of 10, a good but not top-tier month. Rain picks up compared to mid-year, with 15.8 rain days and 158mm of rainfall. Temperatures are warm, with highs of 26.7°C and lows of 25.3°C, and sunshine runs at 10.9 hours a day.
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