Surabaya weather by month
The best time to visit Surabaya is July to September — 77/100 in August, 32°C and 3 rainy days. The best season is the dry season, May to October (69/100 on average).
The worst month is March at 44/100 — sweltering, soaked, poor air quality. See March →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Indonesia →
Best season: May to October (69/100 on average) · worst March (44/100)
- Days
- 32°C
- Nights
- 25°C
- Wet days
- 3
- Sun
- 11 h
- Humidity
- 69%
- Daylight
- 12 h
Surabaya, month by month
Comfort score out of 100 for the kind of trip Surabaya is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Surabaya through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Surabaya in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyIndependence Day, school holidays in 4 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Surabaya
Real experiences from travellers' own write-ups, quoted with a link to the original.
Getting around
A 3-day itinerary for Surabaya recommends the train over public buses or minibuses for getting around, since heavy traffic is a real problem across the city regardless of which road transport option you pick. Their seasonal advice: the dry season, April through October, is the prime window for exploring the outdoor sights like Bungkul Park and the old Arab, Chinese, and colonial quarters in the city's north without rain disrupting plans.
Traveller notes on Surabaya
What people who have been say about the place — the year-round notes first, then month by month.
Forum posters describe January as squarely within Java's rainy season, with a real chance of rain especially at higher elevations, though conditions stay genuinely variable - a lucky morning can be dry, with rain more typically starting around midday. Posters describe the wet-season pattern as usually bringing rain in the late afternoon or overnight, intermittent rather than constant, so an umbrella is generally enough to keep plans on track. Posters visiting nearby Mount Bromo specifically note a real trade-off: only a 10-30% chance of a clear sunrise in January, but far fewer tourists and more of the site to yourself as a result. Posters generally rate January as manageable for a Surabaya-area visit with realistic expectations and rain gear on hand.
Forum posters describe July as squarely inside East Java's dry season, with Surabaya itself hot and humid - posters call it one of the hottest cities in Indonesia. July also lines up with peak season for the popular Mount Bromo and Ijen day trips from the city, though posters flag a sharp contrast at altitude: temperatures at the Penanjakan viewpoint above Bromo can drop to 4-9C for sunrise, cold enough that many visitors skip the viewing point rather than brave it. Posters recommend packing a mask for dust given the dry conditions, and note Ijen's crater can occasionally close depending on volcanic activity, so building flexibility into a mountain-focused itinerary from Surabaya is worthwhile.
Add your own note from Surabaya's card on the map.