Best time to visit Surabaya
Month-by-month weather averages for Surabaya.
Surabaya, East Java, Indonesia
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 31.1 °C / 88 °F | 25.8 °C / 78 °F | 266 mm / 10.5 in | neither best nor good |
| February | 31 °C / 88 °F | 25.7 °C / 78 °F | 276 mm / 10.9 in | neither best nor good |
| March | 31.4 °C / 89 °F | 26 °C / 79 °F | 278 mm / 10.9 in | neither best nor good |
| April | 31.7 °C / 89 °F | 26.3 °C / 79 °F | 196 mm / 7.7 in | neither best nor good |
| May | 32 °C / 90 °F | 26.5 °C / 80 °F | 119 mm / 4.7 in | neither best nor good |
| June | 31.6 °C / 89 °F | 25.9 °C / 79 °F | 56 mm / 2.2 in | neither best nor good |
| July | 31.2 °C / 88 °F | 25.1 °C / 77 °F | 24 mm / 0.9 in | neither best nor good |
| August | 31.6 °C / 89 °F | 25 °C / 77 °F | 12 mm / 0.5 in | neither best nor good |
| September | 32.6 °C / 91 °F | 25.6 °C / 78 °F | 29 mm / 1.1 in | neither best nor good |
| October | 33.1 °C / 92 °F | 26.4 °C / 80 °F | 83 mm / 3.3 in | neither best nor good |
| November | 32.6 °C / 91 °F | 26.6 °C / 80 °F | 193 mm / 7.6 in | neither best nor good |
| December | 31.7 °C / 89 °F | 26.1 °C / 79 °F | 285 mm / 11.2 in | neither best nor good |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: neither
- JJuly: neither
- AAugust: neither
- SSeptember: neither
- OOctober: neither
- NNovember: neither
- DDecember: neither
No month is good for this in Surabaya.
Equatorial heat and humidity (apparent highs of 36-39C) make outdoor exploring taxing every month; December-April pile on very heavy, mostly afternoon rain, while July-September, the driest and least humid stretch, is merely the least oppressive rather than comfortable.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Jade Dragon Mountain, 4052 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 37 °C | 37.2 °C | 38.3 °C | 38.7 °C | 38 °C | 36.7 °C | 35.6 °C | 35.9 °C | 37.2 °C | 38.6 °C | 39 °C | 38.1 °C |
| Days with heavy rain | 10.4 days | 11.3 days | 10.2 days | 6.7 days | 3.6 days | 1.5 days | 0.5 days | 0.1 days | 0.8 days | 2.4 days | 7.3 days | 11 days |
| Time rain usually falls | 4 pm | 5 pm | 5 pm | 4 pm | 3 pm | 4 pm | 4 pm | 4 pm | 4 pm | 4 pm | 3 pm | 4 pm |
| Sunshine per day | 9 h | 9.5 h | 9.8 h | 10.1 h | 10.3 h | 10.6 h | 10.8 h | 11 h | 11.2 h | 11.4 h | 10.5 h | 9.2 h |
| Relative humidity | 83% | 83% | 82% | 81% | 77% | 76% | 73% | 70% | 68% | 70% | 75% | 81% |
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 42.1 µg/m³ | 36.8 µg/m³ | 45.4 µg/m³ | 43.5 µg/m³ | 34.1 µg/m³ | 32.3 µg/m³ | 25.3 µg/m³ | 22.2 µg/m³ | 26.9 µg/m³ | 44 µg/m³ | 52.8 µg/m³ | 56.3 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 69.3 µg/m³ | 56.5 µg/m³ | 79.4 µg/m³ | 78.3 µg/m³ | 62.2 µg/m³ | 59.8 µg/m³ | 47.7 µg/m³ | 42.9 µg/m³ | 50.3 µg/m³ | 84.4 µg/m³ | 96.5 µg/m³ | 92.1 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.
Events and seasons
What the weather records cannot show. A major event can lift a month to good or best. The warnings are there to help you plan, and never count against a month.
Reasons to go
- Chinese New Year
January and February, dates vary from year to year
- Surabaya big sale
1 May–30 June
- Festival Seni Surabaya
June, dates vary from year to year
- Indonesian Independence Day
17 August
Worth knowing before you go
- Idul Fitri (Lebaran) closures and travel rush Major
February and March, dates vary from year to year
- Ramadan
January, February and March, dates vary from year to year