Surabaya weather in September 2025
Surabaya weather in September 2025
Day
33 °C
Night
24 °C
Sea
28 °C
Precipitation
22 mm
in month
Rainy days
2 days
in month
Daylight
12 hours
average
Sunshine
11 hours
average
Humidity
69 %
Day
33 °C
Night
24 °C
Sea
28 °C
Precipitation
22 mm
in month
Rainy days
2 days
in month
Daylight
12 hours
average
Sunshine
11 hours
average
Humidity
69 %
Overview: Surabaya
Travel information
Weather charts for Surabaya
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.
Find more destinations like this
Destinations with similar weather to Surabaya
Other destinations in East Java - Indonesia
Weather overview for Surabaya
Weather overview
In September in Surabaya, the average air temperature ranges from 33 °C (92 °F) during the day to 24 °C (75 °F) at night. There are 2 days of rain on average, where the rainfall is 22 mm (0.88 in).
Are there good conditions to visit in Surabaya in September?
In Surabaya in September, there are ideal conditions for a vacation. The temperature of the sea will be perfect at 28 °C (83 °F). At night, temperatures hover around a pleasant 24 °C (75 °F). There are only 2 days of rain in the whole month, so you can leave your umbrella at home. Some people will find 33 °C (92 °F) temperature high, while others will enjoy it.
What temperature can I expect during the day in September in Surabaya?
The average daily temperature in September in Surabaya is 33 °C (92 °F). The great temperature for lying by the sea or pool and sunbathing, everywhere else you will probably be a bit hot. Don't forget to drink during the day, in these temperatures you should hydrate yourself a lot.
What is the sea temperature in Surabaya in September?
In September in Surabaya expect the sea to be warm at 28 °C (83 °F). This temperature is someone's dream come true, while for someone it may no longer be ideal for the purpose of refreshment.
What is the average number of rainy days in Surabaya in September?
In September in Surabaya, we can expect 2 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 0.4 days of the week, or in general - 6 % days.
How long is the day (from dawn till dusk) in Surabaya in September?
The length of daylight in September in Surabaya is 12 hours.
What is the night temperature in Surabaya in September?
The average night temperature in Surabaya in September is 24 °C (75 °F). A very pleasant temperature for long evening walks, fun over a drink outside, or doing sports in the morning. If possible, look for a hotel with air conditioning.
Is the sea in Surabaya warmer in September than in October?
No, the sea is not warmer in Surabaya in September than in October.
Is there a dry season in Surabaya in September?
Yes, there is a dry season in Surabaya in September with just 2 days during the month being rainy.
How many hours of sun to expect in September in Surabaya?
There is an average length of sunshine of 11 hours per day in September in Surabaya.
Is it hot in September in Surabaya?
Yes, it is hot in September in Surabaya, although the perception of heat can be subjective. Daytime temperatures rise to 33 °C (92 °F).
How windy is Surabaya in September?
In Surabaya in September, there will be an average wind scale of 3. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.
Is the weather in Surabaya warmer in September than in August?
Yes, September in Surabaya is warmer than August by 1 °C (33 °F).
Is Surabaya rainier in September than in October?
No, September in Surabaya is not a rainier month than October.
Is the temperature rising or falling in the course of time in Surabaya in September?
Over the course of September in Surabaya, the temperatures are rising from 33 °C (91 °F) at the beginning of the month to 33 °C (92 °F) at the end of the month.
What is the humidity in September in Surabaya?
In Surabaya in September, expect humidity around 69 %.