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Surabaya
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Weather in Surabaya for September 2025

Your guide to Surabaya weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Surabaya is slightly cooler than the historical average by -0.6 °C.

  • The forecast for the upcoming days in Surabaya predicts a temperature of 33.2 °C, which is slightly above the historical average.

  • In general, the average temperature in Surabaya at the beginning of September is 31.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 33.3 °C by the end of September.

    • Rain 🌧️

  • With an average of 5 rainy days, Surabaya experiences minimal rainfall in September.

    • More

  • Is September a good time to visit Surabaya? check out the best time to travel to Surabaya page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
25
Dry days
Average rainy days
5
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/24°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
62 %
Avg humidity

Surabaya Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
31°
2
Sunny
31°
3
Sunny
32°
4
Patchy rain possible
32°
5
Sunny
31°
6
Sunny
32°
7
Partly cloudy
32°
8
Partly cloudy
32°
9
Patchy rain possible
32°
10
Sunny
32°
11
Patchy rain possible
32°
12
Patchy rain possible
32°
13
Sunny
32°
14
Partly cloudy
32°
15
Sunny
33°
16
Patchy rain possible
33°
17
Moderate rain
32°
18
Patchy rain possible
33°
19
Patchy rain possible
32°
20
Patchy rain possible
33°
21
Sunny
33°
22
Sunny
34°
23
Sunny
35°
24
Sunny
34°
25
Sunny
34°
26
Patchy rain possible
32°
27
Sunny
33°
28
Sunny
33°
29
Partly cloudy
34°
30
Partly cloudy
33°

Temperatures trend during September in Surabaya

See the weather trend as well as the moving average line

September weather in Surabaya day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 31° /23° 0 mm 9
2 Sept. Sunny
Sunny
 31° /23° 0.1 mm 8
3 Sept. Sunny
Sunny
 32° /24° 0.6 mm 9
4 Sept. Patchy rain possible
Patchy rain possible
 32° /23° 0.6 mm 8
5 Sept. Sunny
Sunny
 31° /23° 0.1 mm 8
6 Sept. Sunny
Sunny
 32° /24° 0.1 mm 8
7 Sept. Partly cloudy
Partly cloudy
 32° /24° 0.4 mm 8
8 Sept. Partly cloudy
Partly cloudy
 32° /24° 0.2 mm 9
9 Sept. Patchy rain possible
Patchy rain possible
 32° /24° 0.8 mm 8
10 Sept. Sunny
Sunny
 32° /24° 5.7 mm 8
11 Sept. Patchy rain possible
Patchy rain possible
 32° /24° 0.4 mm 8
12 Sept. Patchy rain possible
Patchy rain possible
 32° /24° 0.3 mm 8
13 Sept. Sunny
Sunny
 32° /24° 0.2 mm 8
14 Sept. Partly cloudy
Partly cloudy
 32° /24° 0.1 mm 8
15 Sept. Sunny
Sunny
 33° /23° 0.1 mm 8
16 Sept. Patchy rain possible
Patchy rain possible
 33° /25° 2.1 mm 3.2
17 Sept. Moderate rain
Moderate rain
 32° /25° 7.6 mm 2.7
18 Sept. Patchy rain possible
Patchy rain possible
 33° /25° 3.1 mm 2.9
19 Sept. Patchy rain possible
Patchy rain possible
 32° /26° 0.3 mm 2.7
20 Sept. Patchy rain possible
Patchy rain possible
 33° /26° 0.8 mm 3.1
21 Sept. Sunny
Sunny
 33° /26° 0 mm 8
22 Sept. Sunny
Sunny
 34° /26° 0 mm 8
23 Sept. Sunny
Sunny
 35° /26° 0 mm 8
24 Sept. Sunny
Sunny
 34° /26° 0 mm 8
25 Sept. Sunny
Sunny
 34° /25° 0 mm 8
26 Sept. Patchy rain possible
Patchy rain possible
 32° /27° 0.5 mm 7
27 Sept. Sunny
Sunny
 33° /27° 0 mm 8
28 Sept. Sunny
Sunny
 33° /27° 0 mm 8
29 Sept. Partly cloudy
Partly cloudy
 34° /27° 0.1 mm 9
30 Sept. Partly cloudy
Partly cloudy
 33° /25° 0.1 mm 9
Next
Important Notice
Our weather forecast for Surabaya in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Surabaya forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Surabaya weather in September vs August vs October

Compare September weather in Surabaya with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherSunny
Sunny
Sunny
Sunny
Patchy rain possible
Patchy rain possible
Temperatures31°/23°32°/24°33°/26°
Rainfall8 mm14 mm19 mm
Wind16.9 km/h17.9 km/h17.7 km/h
Humidity65%62%61%
Rainy days4 days5 days7 days
Dry days27 days25 days24 days

Planning a trip to Surabaya? Discover the best time to visit

Surabaya in September - FAQ

What are the expected maximum and minimum temperatures in Surabaya during September?
During September, expect a variety of temperatures with highs around 32° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Surabaya during September?
Expect minimal rainfall in Surabaya during September, with a total of 14.4 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Surabaya during September?
The average wind speed in Surabaya during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Surabaya in September?

As you prepare for your trip to Surabaya in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Surabaya, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
  • Footwear
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

September rainfall patterns in Surabaya

Explore the daily rainfall trends and prepare for Surabayas September weather 💧

UV exposure in Surabaya during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is Surabaya?

Get accurate weather forecasts for Surabaya, located at latitude -7.249 and longitude 112.751. Stay updated with localized weather information tailored for Surabaya.

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