Karimunjawa weather by month & the best time to visit
Indonesia · coastal city break · tropical — wet & dry seasons climate
The best time to visit Karimunjawa is August — its sunniest month (Sunshine Score 88/100), with September and July close behind. Karimunjawa averages about 2,331 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 23 mm of rain in August.
When is the best time to visit Karimunjawa?
For sunshine, the best time to visit Karimunjawa is August, then September and July. The dullest month is January (65/100, 351 mm of rain). The full month-by-month picture is in the table below.
How sunny is Karimunjawa?
Karimunjawa gets a moderate 2,331 hours of sunshine a year. August (88/100) is noticeably better than January (65). It ranks #43 of 119 destinations in Indonesia for annual sunshine, above the national median of 2,183 hours. Rain has a clear season: the wettest stretch, around January, carries about 50% of the annual 1,913 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 65 | 28° / 82°F | 27° / 81°F | 351 mm | 10 | 30° / 86°F |
| February | 65 | 28° / 82°F | 27° / 81°F | 307 mm | 10 | 30° / 86°F |
| March | 65 | 28° / 82°F | 27° / 81°F | 212 mm | 11 | 30° / 86°F |
| April | 65 | 29° / 84°F | 28° / 82°F | 173 mm | 11 | 31° / 88°F |
| May | 69 | 29° / 84°F | 28° / 82°F | 128 mm | 10 | 31° / 88°F |
| June | 76 | 29° / 84°F | 28° / 82°F | 92 mm | 9 | 30° / 86°F |
| July | 84 | 28° / 82°F | 27° / 81°F | 47 mm | 10 | 29° / 84°F |
| August | 88 | 28° / 82°F | 27° / 81°F | 23 mm | 11 | 29° / 84°F |
| September | 86 | 28° / 82°F | 27° / 81°F | 38 mm | 12 | 30° / 86°F |
| October | 76 | 29° / 84°F | 28° / 82°F | 88 mm | 11 | 31° / 88°F |
| November | 65 | 29° / 84°F | 28° / 82°F | 162 mm | 10 | 31° / 88°F |
| December | 65 | 28° / 82°F | 27° / 81°F | 292 mm | 9 | 30° / 86°F |
Sea temperature in Karimunjawa by month
The sea off Karimunjawa is warmest in April 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
Karimunjawa: questions and answers
What kind of destination is Karimunjawa?
Karimunjawa is a coastal city break in Indonesia 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 Karimunjawa get a year?
Karimunjawa gets about 2,331 hours of sunshine a year, at its best around August.
When is the best time to visit Karimunjawa?
The sunniest time to visit Karimunjawa is August, when the Sunshine Score peaks at 88/100 (with September and July close behind). Expect daytime highs around 28°C / 82°F.
What is the least sunny month in Karimunjawa?
January is the least sunny month in Karimunjawa, scoring 65/100 with about 351 mm of rain.
What is the sea temperature in Karimunjawa?
The sea in Karimunjawa ranges from about 29°C (July) to 31°C (April). Month-by-month sea temperatures are on this page.
How strong is the sun in Karimunjawa?
The typical midday UV index in Karimunjawa peaks around 12 (extreme) in September, 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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