Koumac weather by month & the best time to visit
New Caledonia · beach resort · tropical — wet & dry seasons climate
The best time to visit Koumac is September — its sunniest month (Sunshine Score 89/100), with October and July close behind. Koumac averages about 2,687 hours of sunshine a year. Daytime highs around 25°C / 77°F and roughly 33 mm of rain in September.
When is the best time to visit Koumac?
For sunshine, the best time to visit Koumac is September, then October and July. The dullest month is February (67/100, 151 mm of rain). The full month-by-month picture is in the table below.
How sunny is Koumac?
Koumac gets a lot of sun: around 2,687 hours a year. September (89/100) is noticeably better than February (67). It ranks #11 of 11 destinations in New Caledonia for annual sunshine, below the national median of 2,762 hours. Rain has a clear season: the wettest stretch, around February, carries about 45% of the annual 1,084 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 70 | 29° / 84°F | 26° / 79°F | 133 mm | 12 | 31° / 88°F |
| February | 67 | 29° / 84°F | 26° / 79°F | 151 mm | 12 | 30° / 86°F |
| March | 67 | 29° / 84°F | 26° / 79°F | 201 mm | 10 | 30° / 86°F |
| April | 73 | 28° / 82°F | 25° / 77°F | 117 mm | 8 | 28° / 82°F |
| May | 78 | 26° / 79°F | 23° / 73°F | 91 mm | 6 | 25° / 77°F |
| June | 81 | 25° / 77°F | 22° / 72°F | 73 mm | 5 | 24° / 75°F |
| July | 86 | 24° / 75°F | 21° / 70°F | 47 mm | 6 | 23° / 73°F |
| August | 86 | 24° / 75°F | 20° / 68°F | 46 mm | 7 | 23° / 73°F |
| September | 89 | 25° / 77°F | 21° / 70°F | 33 mm | 9 | 24° / 75°F |
| October | 87 | 26° / 79°F | 22° / 72°F | 40 mm | 10 | 26° / 79°F |
| November | 84 | 27° / 81°F | 24° / 75°F | 59 mm | 11 | 28° / 82°F |
| December | 78 | 29° / 84°F | 25° / 77°F | 93 mm | 12 | 30° / 86°F |
Sea temperature in Koumac by month
The sea off Koumac is warmest in January at around 31°C / 88°F, and coolest in July at 23°C / 73°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
Koumac: questions and answers
What kind of destination is Koumac?
Koumac is a beach resort in New Caledonia with a tropical — wet & dry seasons climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Koumac get a year?
Koumac gets about 2,687 hours of sunshine a year, at its best around September.
When is the best time to visit Koumac?
The sunniest time to visit Koumac is September, when the Sunshine Score peaks at 89/100 (with October and July close behind). Expect daytime highs around 25°C / 77°F.
What is the least sunny month in Koumac?
February is the least sunny month in Koumac, scoring 67/100 with about 151 mm of rain.
What is the sea temperature in Koumac?
The sea in Koumac ranges from about 23°C (July) to 31°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Koumac?
The typical midday UV index in Koumac peaks around 12 (extreme) in January, easing to about 5 (moderate) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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