Best time to visit Semarang

July is the best month in Semarang, scoring 66 out of 100, with October the weakest at 36. 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 35.4 °C and February the coolest at 29.3 °C — a 6.1 °C spread across the year. 249 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, November and December carry the rain — up to 28 wet days in a month — while June to September drop as low as 5. That 23-day gap is the biggest single difference between a good month and a bad one in Semarang, and it moves further than the temperature does.

The sea never drops below 28.5 °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 July, June, August. The one to think twice about is October. Each month below has its own page with rainfall reliability, extremes, daylight, sea temperature and crowd levels.

Semarang month by month