Surabaja weather in September 2025

Expect 32°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Surabaja in September. Check more long-term weather averages for Surabaja in September before you book your next holiday to Indonesia in 2025/2026.

  • 32°C maximum daytime temperature in September in Surabaja32
    32°C max day temperature
  • 11 hours of sunshine per day
  • 1 day with some rainfall in September in Surabaja1
    1 day with some rainfall
  • 24°C minimum night-time temperature in September in Surabaja24
    24°C min night temperature
  • 12 hours of daylight per day in September in Surabaja12
    12 hours of daylight per day
  • Very high heat & humidity in September in SurabajaVH
    Very High heat & humidity
  • 20 mm monthly rainfall in September in Surabaja20
    20 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Surabaja11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Surabaja28
    28°C sea temperature

More about Surabaja

Surabaja by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Indonesia

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

The September weather guide for Indonesia (Surabaja) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Indonesia

How hot is it in Surabaja in September?

Daytime temperatures usually reach 32°C in Surabaja in September with very high heat and humidity, falling to 24°C at night.

How sunny is it in Surabaja in September?

There are normally 11 hours of bright sunshine each day in Surabaja in September - that's 90% of daylight hours.

How warm is the sea around Surabaja in September?

The average sea temperature around Surabaja in September is 28°C.

Does it ever rain in Surabaja in September?

There is usually 1 day with some rain in Surabaja in September and the average monthly rainfall is 20mm.

Surabaja September sunrise & sunset times

Browse the sunrise and sunset times for Surabaja in September 2025. Select a month to view Surabaja sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:30 17:28
Monday, 15th September 2025 05:23 17:26
Tuesday, 30th September 2025 05:14 17:24

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^