Tanna Island weather by month & the best time to visit
Vanuatu · beach resort · tropical monsoon climate
The best time to visit Tanna Island is August — its sunniest month (Sunshine Score 84/100), with September and July close behind. Tanna Island averages about 2,654 hours of sunshine a year. Daytime highs around 23°C / 73°F and roughly 59 mm of rain in August.
When is the best time to visit Tanna Island?
For sunshine, the best time to visit Tanna Island is August, then September and July. The dullest month is January (67/100, 175 mm of rain). The full month-by-month picture is in the table below.
How sunny is Tanna Island?
Tanna Island gets a lot of sun: around 2,654 hours a year. August (84/100) is noticeably better than January (67). Tanna Island is the sunniest of the 16 destinations tracked in Vanuatu. The year's 1,386 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 67 | 27° / 81°F | 26° / 79°F | 175 mm | 13 | 29° / 84°F |
| February | 67 | 28° / 82°F | 27° / 81°F | 156 mm | 13 | 29° / 84°F |
| March | 67 | 28° / 82°F | 27° / 81°F | 210 mm | 11 | 29° / 84°F |
| April | 67 | 27° / 81°F | 26° / 79°F | 185 mm | 9 | 28° / 82°F |
| May | 75 | 26° / 79°F | 25° / 77°F | 106 mm | 7 | 26° / 79°F |
| June | 79 | 25° / 77°F | 24° / 75°F | 84 mm | 6 | 26° / 79°F |
| July | 82 | 24° / 75°F | 23° / 73°F | 67 mm | 6 | 26° / 79°F |
| August | 84 | 23° / 73°F | 22° / 72°F | 59 mm | 7 | 25° / 77°F |
| September | 84 | 24° / 75°F | 23° / 73°F | 56 mm | 9 | 25° / 77°F |
| October | 79 | 25° / 77°F | 24° / 75°F | 86 mm | 10 | 25° / 77°F |
| November | 79 | 25° / 77°F | 25° / 77°F | 86 mm | 11 | 27° / 81°F |
| December | 73 | 27° / 81°F | 26° / 79°F | 116 mm | 12 | 28° / 82°F |
Sea temperature in Tanna Island by month
The sea off Tanna Island is warmest in January at around 29°C / 84°F, and coolest in August at 25°C / 77°F. The water sits at a comfortable 21°C or warmer roughly all year round. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
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Tanna Island: questions and answers
What kind of destination is Tanna Island?
Tanna Island is a beach resort in Vanuatu with a tropical monsoon climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Tanna Island get a year?
Tanna Island gets about 2,654 hours of sunshine a year, at its best around August.
When is the best time to visit Tanna Island?
The sunniest time to visit Tanna Island is August, when the Sunshine Score peaks at 84/100 (with September and July close behind). Expect daytime highs around 23°C / 73°F.
What is the least sunny month in Tanna Island?
January is the least sunny month in Tanna Island, scoring 67/100 with about 175 mm of rain.
Is Tanna Island the sunniest place in Vanuatu?
Yes — with about 2,654 hours of sunshine a year, Tanna Island has the most annual sunshine of the 16 Vanuatu destinations tracked by Sunshine Atlas.
What is the sea temperature in Tanna Island?
The sea in Tanna Island ranges from about 25°C (August) to 29°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Tanna Island?
The typical midday UV index in Tanna Island peaks around 13 (extreme) in January, easing to about 6 (high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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