Surabaya weather in May
In May, Surabaya has an average high of 30 °C86 °F and an average low of 26 °C79 °F, with about 123 mm4.8 in of precipitation. It is the 5th warmest month of the year and ranks 7th for precipitation.
How May compares with other months
Compared with April, May is about the same temperature and drier by 71 mm2.8 in. Compared with June, May is about the same temperature and wetter by 49 mm1.9 in. Daylight lasts about 11.8 hours around the middle of the month. Average relative humidity is 80% and the average cloud amount 61%.
Is May a good time to visit Surabaya?
May is not among the most comfortable months by our comfort score: it is hot (average high 30 °C86 °F), it is fairly wet (123 mm4.8 in) and it is humid (80%). The most comfortable months in Surabaya are June–August.
What to wear in May
For Surabaya in May, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
May in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Surabaya | 3086 | 2679 | 1234.8 |
| Mojokerto | 3187 | 2475 | 1214.7 |
| Pasuruan | 3086 | 2679 | 1174.6 |
| Probolinggo | 3086 | 2476 | 1194.7 |
| Malang | 2781 | 2170 | 1265.0 |
| Kediri | 2985 | 2474 | 1234.9 |
| Lumajang | 3086 | 2475 | 1194.7 |
| Blitar | 2984 | 2373 | 1234.9 |
| Madiun | 3086 | 2373 | 1194.7 |
Nearby places that are more than 1 °C1.8 °F cooler: Malang, Kediri, Lumajang and Blitar.
Other months in Surabaya
- January29 °C84 °F / 26 °C78 °F
- February29 °C83 °F / 25 °C78 °F
- March29 °C84 °F / 26 °C78 °F
- April30 °C85 °F / 26 °C79 °F
- May30 °C86 °F / 26 °C79 °F
- June30 °C87 °F / 25 °C77 °F
- July31 °C88 °F / 24 °C76 °F
- August32 °C90 °F / 24 °C76 °F
- September33 °C92 °F / 25 °C78 °F
- October33 °C92 °F / 26 °C80 °F
- November32 °C89 °F / 27 °C80 °F
- December30 °C85 °F / 26 °C79 °F
Frequently asked questions
How warm is Surabaya in May?
In May the average high in Surabaya is 30 °C (86 °F) and the average low is 26 °C (79 °F).
Does it rain a lot in Surabaya in May?
On average about 123 mm (4.8 in) of precipitation falls in May; it ranks 7th of the 12 months.
Is May the warmest month in Surabaya?
No. The warmest month in Surabaya is September, with an average high of 33 °C (92 °F). The coldest month is July, with an average low of 24 °C (76 °F).
How long is the day in Surabaya in May?
In the middle of May the day in Surabaya lasts about 11.8 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Surabaya in May?
The average relative humidity in May is about 80%. Combined with warm days, it can feel muggy.
How cloudy is Surabaya in May?
On average about 61% of the sky is covered by cloud in May. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.