Sydney weather in August
Sydney averages 18°C by day and 9°C at night in August, with the sea at 18°C and 8 days with at least 1 mm of rain. It warms up by about 3°C into September.
Day
18°C
Night
9°C
Sea
18°C
Rainy days
8
Flight from London
20½h
What August feels like
August is mild in Sydney: good for exploring, not reliably beach weather.
The sea is 18°C: refreshing, and chilly for most people after a few minutes.
Expect some rain: about 8 days with at least 1 mm.
Of the 48 sun destinations we track, Sydney is the #47 warmest in August.
Want it warmer in August?
These are hotter than Sydney this month for at most an hour and a half more flying:
Sydney weather by month
August is highlighted. Compare with July and September, or see the full year in Sydney.
Sydney in August: quick answers
Is Sydney hot in August?
August is mild in Sydney: good for exploring, not reliably beach weather. Average highs are 18°C and lows 9°C.
Can you swim in Sydney in August?
The sea is 18°C: refreshing, and chilly for most people after a few minutes.
Does it rain in Sydney in August?
Expect some rain: about 8 days with at least 1 mm.
What is the warmest month in Sydney?
January, at an average high of 27°C. The coolest is June at 17°C.
How long is the flight to Sydney from the UK?
About 20½h direct from London, estimated from the 17,016 km distance. Check your airline for exact times.
Still choosing? See where is hot in August for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in August from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. A rainy day has at least 1 mm of rain. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Sydney in August?
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