Will it rain today in Surabaya?
Should you take an umbrella in Surabaya? The forecast below loads live every time you open the page: rain now, when the next shower comes, and how much falls today and tomorrow.
Rain right now
No rain expected in Surabaya for the rest of today. Tomorrow looks dry.
As of 2026-10-16 17:35 UTC (NOAA GFS snapshot). Updating live…
Rain every 3 hours, today and tomorrow
Today · Saturday 17 October
Dry: no rain in the forecast.
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 22:00–01:00 | 0 | 0 | dry |
| 01:00–04:00 | 0 | 0 | dry |
| 04:00–07:00 | 0 | 0 | dry |
| 07:00–10:00 | 0 | 0 | dry |
| 10:00–13:00 | 0 | 0 | dry |
| 13:00–16:00 | 0 | 0 | dry |
| 16:00–19:00 | 0.1 | 0 | dry |
| 19:00–22:00 | 0 | 0 | dry |
Tomorrow · Sunday 18 October
Dry: no rain in the forecast. (the forecast covers part of the day)
Every 3 hours as a table
| Hours | Rain (mm) | mm/h | Type |
|---|---|---|---|
| 22:00–01:00 | 0.1 | 0 | dry |
| 01:00–04:00 | 0.1 | 0 | dry |
| 04:00–07:00 | 0 | 0 | dry |
| 07:00–10:00 | 0 | 0 | dry |
| 10:00–13:00 | 0 | 0 | dry |
| 13:00–16:00 | 0 | 0 | dry |
| 16:00–19:00 | 0.1 | 0 | dry |
Times in local time (Asia/Jakarta). Each bar is the rain over 3 hours; striped bars are snow.
Rain map around Surabaya
The same NOAA GFS precipitation on the map, moving hour by hour: blue light, darker heavy. Tap for the value.
How much it rains in Surabaya, month by month
Surabaya gets about 1,882 mm of rain a year. The wettest month is January (337 mm), the driest August (11 mm); a normal October brings 63 mm.
Average monthly rain and snow (water equivalent) 2001–2025, NASA POWER (MERRA-2 reanalysis, public domain), on a ~50 km grid: mountains and coasts can differ locally.
More for Surabaya
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Questions
- Will it rain today in Surabaya?
- At 17 October 2026 the forecast said: No rain expected in Surabaya for the rest of today. Tomorrow looks dry. The box at the top of the page loads the latest NOAA GFS forecast every time you open it, with the time the next rain starts.
- How much does it rain in Surabaya?
- About 1,882 mm a year on average (2001–2025). January is the wettest month with 337 mm, August the driest with 11 mm.
- What do the rain amounts mean?
- 1 mm is a litre of water per square metre. Under 2.5 mm an hour is light rain (a drizzle to a steady rain), 2.5–7.6 moderate, above 7.6 heavy: you get soaked in minutes and streets can flood.
- How accurate is the forecast?
- It is the global NOAA GFS model on a 0.25° grid every 3 hours: good at telling a rainy day from a dry one, less at placing a single summer thunderstorm. Check the rain map for the showers moving around Surabaya.
Rain forecast nearby
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How this page works
The rain is the one the rain layer of the map paints: NOAA GFS forecast (public domain), precipitation rate averaged over 3 hours, read at Surabaya and summed per local day. Rain or snow comes from the GFS precipitation type. The monthly normals are NASA POWER. No third-party weather service.