Sydney weather in August 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Sydney in August. Check more long-term weather averages for Sydney in August before you book your next holiday to New South Wales in 2025/2026.

  • 18°C maximum daytime temperature in August in Sydney18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in August in Sydney10
    10 days with some rainfall
  • 9°C minimum night-time temperature in August in Sydney9
    9°C min night temperature
  • 11 hours of daylight per day in August in Sydney11
    11 hours of daylight per day
  • No heat & humidity in August in Sydney0
    No heat & humidity
  • 96 mm monthly rainfall in August in Sydney96
    96 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in August in Sydney4
    4 (Moderate) UV index
  • 17°C sea temperature in August in Sydney17
    17°C sea temperature

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The August weather guide for New South Wales (Sydney) 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)

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More about Australia

How hot is it in Sydney in August?

Daytime temperatures usually reach 18°C in Sydney in August, falling to 9°C at night.

How sunny is it in Sydney in August?

There are normally 7 hours of bright sunshine each day in Sydney in August - that's 67% of daylight hours.

How warm is the sea around Sydney in August?

The average sea temperature around Sydney in August is 17°C.

Does it rain in Sydney in August?

There are usually 10 days with some rain in Sydney in August and the average monthly rainfall is 96mm.

Sydney August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:48 17:16
Saturday, 16th August 2025 06:33 17:26
Sunday, 31st August 2025 06:15 17:37

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