Surabaya weather by month & the best time to visit
Indonesia · major coastal city · tropical — wet & dry seasons climate
The best time to visit Surabaya is July — its sunniest month (Sunshine Score 87/100), with June close behind. Surabaya averages about 2,492 hours of sunshine a year. Daytime highs around 32°C / 90°F and roughly 34 mm of rain in July.
When is the best time to visit Surabaya?
For sunshine, the best time to visit Surabaya is July, then June. The dullest month is October (50/100, 60 mm of rain). The full month-by-month picture is in the table below.
How sunny is Surabaya?
Surabaya gets a moderate 2,492 hours of sunshine a year. July (87/100) is noticeably better than October (50). It ranks #32 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 1,849 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 66 | 30° / 86°F | 24° / 75°F | 326 mm | 10 | 32° / 90°F |
| February | 66 | 30° / 86°F | 24° / 75°F | 321 mm | 10 | 31° / 88°F |
| March | 66 | 30° / 86°F | 25° / 77°F | 280 mm | 10 | 31° / 88°F |
| April | 66 | 30° / 86°F | 25° / 77°F | 194 mm | 10 | 32° / 90°F |
| May | 71 | 31° / 88°F | 24° / 75°F | 121 mm | 9 | 31° / 88°F |
| June | 81 | 31° / 88°F | 23° / 73°F | 69 mm | 8 | 31° / 88°F |
| July | 87 | 32° / 90°F | 22° / 72°F | 34 mm | 9 | 29° / 84°F |
| August | 73 | 34° / 93°F | 22° / 72°F | 11 mm | 10 | 29° / 84°F |
| September | 54 | 36° / 97°F | 23° / 73°F | 17 mm | 11 | 30° / 86°F |
| October | 50 | 36° / 97°F | 25° / 77°F | 60 mm | 11 | 31° / 88°F |
| November | 55 | 34° / 93°F | 26° / 79°F | 133 mm | 10 | 32° / 90°F |
| December | 66 | 31° / 88°F | 25° / 77°F | 283 mm | 9 | 31° / 88°F |
Sea temperature in Surabaya by month
The sea off Surabaya is warmest in January at around 32°C / 90°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
Head-to-head
How Surabaya compares month by month: Surabaya vs Semarang · Surabaya vs Malang · Surabaya vs Denpasar · Surabaya vs Yogyakarta · all comparisons
Surabaya: questions and answers
What kind of destination is Surabaya?
Surabaya is a major coastal city in Indonesia with a tropical — wet & dry seasons climate — the sea reaches 32°C at its warmest and is swimmable (21°C+) year-round.
How many hours of sunshine does Surabaya get a year?
Surabaya gets about 2,492 hours of sunshine a year, at its best around July.
When is the best time to visit Surabaya?
The sunniest time to visit Surabaya is July, when the Sunshine Score peaks at 87/100 (with June close behind). Expect daytime highs around 32°C / 90°F.
What is the least sunny month in Surabaya?
October is the least sunny month in Surabaya, scoring 50/100 with about 60 mm of rain.
What is the sea temperature in Surabaya?
The sea in Surabaya ranges from about 29°C (July) to 32°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Surabaya?
The typical midday UV index in Surabaya peaks around 11 (extreme) in September, 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.
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