Sydney weather in April
Sydney averages 23°C by day and 15°C at night in April, with the sea at 22°C and about 77 mm of rain in the month. It cools by about 3°C into May.
Day
23°C
Night
15°C
Sea
22°C
Rain
77 mm
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.
Rain is occasional: about 77 mm in the month.
That is 9°C warmer than an average April day in London.
Of the 56 sun destinations we track, Sydney is the #40 warmest in April.
Going to Sydney in April?
Share the TikToks and Instagram Reels you've saved for Sydney to Dream Trip. It finds the places, pins them on a map and builds your days around them.
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?
Rain is occasional: about 77 mm in the month.
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. Rain is the average monthly total. 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 April?
Save the restaurants, beaches and views you find on TikTok and Instagram for Sydney straight to a map, then let Dream Trip turn them into a day-by-day plan.
