Cilacap weather by month & the best time to visit
Indonesia · coastal city break · tropical monsoon climate
The best time to visit Cilacap is August — its sunniest month (Sunshine Score 85/100), with September close behind. Cilacap averages about 2,250 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 38 mm of rain in August.
When is the best time to visit Cilacap?
For sunshine, the best time to visit Cilacap is August, then September. The dullest month is January (64/100, 314 mm of rain). The full month-by-month picture is in the table below.
How sunny is Cilacap?
Cilacap gets a moderate 2,250 hours of sunshine a year. August (85/100) is noticeably better than January (64). It ranks #55 of 119 destinations in Indonesia for annual sunshine, above the national median of 2,183 hours. The year's 2,671 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 | 64 | 30° / 86°F | 24° / 75°F | 314 mm | 10 | 29° / 84°F |
| February | 64 | 30° / 86°F | 24° / 75°F | 318 mm | 10 | 31° / 88°F |
| March | 64 | 30° / 86°F | 24° / 75°F | 297 mm | 10 | 31° / 88°F |
| April | 64 | 30° / 86°F | 24° / 75°F | 251 mm | 10 | 30° / 86°F |
| May | 64 | 29° / 84°F | 24° / 75°F | 219 mm | 9 | 28° / 82°F |
| June | 67 | 29° / 84°F | 23° / 73°F | 136 mm | 8 | 29° / 84°F |
| July | 74 | 28° / 82°F | 21° / 70°F | 98 mm | 8 | 28° / 82°F |
| August | 85 | 28° / 82°F | 21° / 70°F | 38 mm | 9 | 26° / 79°F |
| September | 76 | 29° / 84°F | 21° / 70°F | 89 mm | 10 | 27° / 81°F |
| October | 64 | 30° / 86°F | 22° / 72°F | 216 mm | 10 | 28° / 82°F |
| November | 64 | 30° / 86°F | 24° / 75°F | 329 mm | 9 | 31° / 88°F |
| December | 64 | 29° / 84°F | 24° / 75°F | 366 mm | 9 | 30° / 86°F |
Sea temperature in Cilacap by month
The sea off Cilacap is warmest in February at around 31°C / 88°F, and coolest in August at 26°C / 79°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
Cilacap: questions and answers
What kind of destination is Cilacap?
Cilacap is a coastal city break in Indonesia with a tropical monsoon climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Cilacap get a year?
Cilacap gets about 2,250 hours of sunshine a year, at its best around August.
When is the best time to visit Cilacap?
The sunniest time to visit Cilacap is August, when the Sunshine Score peaks at 85/100 (with September close behind). Expect daytime highs around 28°C / 82°F.
What is the least sunny month in Cilacap?
January is the least sunny month in Cilacap, scoring 64/100 with about 314 mm of rain.
What is the sea temperature in Cilacap?
The sea in Cilacap ranges from about 26°C (August) to 31°C (February). Month-by-month sea temperatures are on this page.
How strong is the sun in Cilacap?
The typical midday UV index in Cilacap peaks around 10 (very high) in January, easing to about 8 (very high) in June. Month-by-month midday UV values are in the UV column of the table on this page.
Put the Cilacap sunshine badge on your site
A compact badge showing Cilacap's sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: