Sydney weather in April
Sydney averages 23°C by day and 15°C at night in April, with the sea at 22°C and 10 days with at least 1 mm of rain. It cools by about 3°C into May.
Day
23°C
Night
15°C
Sea
22°C
Rainy days
10
Flight from London
20½h
What April feels like
April is warm in Sydney: T-shirt days, a light layer for evenings.
The sea is 22°C: fine for swimming without a wetsuit.
Expect some rain: about 10 days with at least 1 mm.
Of the 48 sun destinations we track, Sydney is the #32 warmest in April.
Want it warmer in April?
These are hotter than Sydney this month for at most an hour and a half more flying:
Sydney weather by month
April is highlighted. Compare with March and May, or see the full year in Sydney.
Sydney in April: quick answers
Is Sydney hot in April?
April is warm in Sydney: T-shirt days, a light layer for evenings. Average highs are 23°C and lows 15°C.
Can you swim in Sydney in April?
The sea is 22°C: fine for swimming without a wetsuit.
Does it rain in Sydney in April?
Expect some rain: about 10 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 April for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in April 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.
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