Best time to visit Surabaya

August is the best month in Surabaya, scoring 73 out of 100, with November the weakest at 43. The 30-point spread means timing is worth planning around without being decisive. The good window runs June to August — 3 months within ten points of the best.

September is the warmest month at 33.8 °C and February the coolest at 28.8 °C — a 5 °C spread across the year. 217 days a year top 30 °C, more than a third of the calendar, so heat is the baseline here rather than a season.

There is a real wet season here. January, February, March, April and December carry the rain — up to 29 wet days in a month — while July to September drop as low as 2. That 27-day gap is the biggest single difference between a good month and a bad one in Surabaya, and it moves further than the temperature does.

The sea never drops below 28.1 °C, so swimming is on the table year round. Daylight barely moves: about 12.5 hours whatever the month, which removes one variable from the decision entirely.

The three strongest months are August, July, June. The one to think twice about is November. Each month below has its own page with rainfall reliability, extremes, daylight, sea temperature and crowd levels.

Surabaya month by month