Surabaya weather in May
May in Surabaya: hot, rainy, with very humid — a good time to visit.
#5 of 12 months in Surabaya · #755 of 897 destinations to visit in May · comfort 67/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Surabaya in May
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Surabaya climate normals — May
| Daytime high | 31°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Rainfall | 85 mm / 3.3 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 11.8 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 90 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Surabaya in May — FAQ
- Is May a good time to visit Surabaya?
- May in Surabaya: hot, rainy, with very humid — a good time to visit. It ranks #5 of 12 months for Surabaya on SeasonMap's comfort score (67/100).
- What is the weather like in Surabaya in May?
- In May, Surabaya averages a daily high of 30.7°C and a low of 25.5°C, with about 84.6 mm of rain over roughly 12.8 rainy days.
- What is the air quality in Surabaya in May?
- Surabaya has a mean US Air Quality Index of about 90 in May.