Manihiki weather by month & the best time to visit
Cook Islands · beach resort · tropical rainforest climate
The best time to visit Manihiki is August — its sunniest month (Sunshine Score 84/100), with September and June close behind. Manihiki averages about 2,903 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 64 mm of rain in August.
When is the best time to visit Manihiki?
For sunshine, the best time to visit Manihiki is August, then September and June. The dullest month is January (69/100, 244 mm of rain). The full month-by-month picture is in the table below.
How sunny is Manihiki?
Manihiki gets a lot of sun: around 2,903 hours a year. Conditions barely change through the year — only 15 Sunshine Score points separate August from January. Manihiki is the sunniest of the 6 destinations tracked in Cook Islands. Rain has a clear season: the wettest stretch, around January, carries about 42% of the annual 1,586 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 69 | 28° / 82°F | 28° / 82°F | 244 mm | 12 | 31° / 88°F |
| February | 69 | 28° / 82°F | 28° / 82°F | 233 mm | 13 | 30° / 86°F |
| March | 69 | 28° / 82°F | 28° / 82°F | 159 mm | 13 | 31° / 88°F |
| April | 78 | 29° / 84°F | 28° / 82°F | 101 mm | 12 | 31° / 88°F |
| May | 77 | 29° / 84°F | 28° / 82°F | 102 mm | 10 | 30° / 86°F |
| June | 79 | 28° / 82°F | 28° / 82°F | 91 mm | 9 | 30° / 86°F |
| July | 79 | 28° / 82°F | 28° / 82°F | 92 mm | 9 | 29° / 84°F |
| August | 84 | 28° / 82°F | 27° / 81°F | 64 mm | 11 | 29° / 84°F |
| September | 83 | 28° / 82°F | 27° / 81°F | 70 mm | 12 | 29° / 84°F |
| October | 74 | 28° / 82°F | 27° / 81°F | 122 mm | 13 | 29° / 84°F |
| November | 76 | 28° / 82°F | 28° / 82°F | 112 mm | 12 | 30° / 86°F |
| December | 69 | 28° / 82°F | 28° / 82°F | 196 mm | 12 | 30° / 86°F |
Sea temperature in Manihiki by month
The sea off Manihiki is warmest in January at around 31°C / 88°F, and coolest in July at 29°C / 84°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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Manihiki: questions and answers
What kind of destination is Manihiki?
Manihiki is a beach resort in Cook Islands with a tropical rainforest climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Manihiki get a year?
Manihiki gets about 2,903 hours of sunshine a year, at its best around August.
When is the best time to visit Manihiki?
The sunniest time to visit Manihiki is August, when the Sunshine Score peaks at 84/100 (with September and June close behind). Expect daytime highs around 28°C / 82°F.
What is the least sunny month in Manihiki?
January is the least sunny month in Manihiki, scoring 69/100 with about 244 mm of rain.
Is Manihiki the sunniest place in Cook Islands?
Yes — with about 2,903 hours of sunshine a year, Manihiki has the most annual sunshine of the 6 Cook Islands destinations tracked by Sunshine Atlas.
What is the sea temperature in Manihiki?
The sea in Manihiki ranges from about 29°C (July) to 31°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Manihiki?
The typical midday UV index in Manihiki peaks around 13 (extreme) in February, easing to about 9 (very high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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