Weather in Sydney in April

How April compares

April is the 6th warmest month of the year in Sydney and ranks 55th of 134 destinations we compare for April - see where else is hot in April. Against London's average high of 13.5°C in April, Sydney is 8.1°C warmer by day and 10.1°C warmer at night.

Daytime and night-time in April

The typical April day in Sydney peaks at 21.6°C, but that is an average: the warmest 10% of days reach 25.0°C or more. Roughly 1 in 10 days top 25°C and 1 in 125 pass 30°C. Nights average 15.2°C; one night in ten drops to 12.6°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest April day here reached 33.5°C (2018-04-12) and the coldest night 9.2°C (1996-04-21).

Rain in April

Some rain (4-8 rainy days): about 8 days with 1 mm or more, 54 mm in total. Year to year it varies a lot - the wettest April was 2015 with 288 mm, the driest 2006 with 4 mm. Humidity averages 73%.

Sea temperature in April

The sea averages 21.9°C - bracing (18-22°c). Depending on the year it ranges from 21.2°C to 22.7°C. For the warmest sea here, come in February (23.0°C).

Sunshine and daylight

Around 6.0 hours of sunshine a day (estimated from cloud cover), 11.1 hours of daylight: the sun rises about 06:18 and sets about 17:33 local time in mid-April. Average cloud cover is 47%.

Is April a good time to visit Sydney?

It is a reasonable choice: warm days. The best months for Sydney on our scoring are December, January, February; months averaging 25°C or more: Jan, Feb.

Warm enough for light clothes, cooler after dark

Sydney feels noticeably warmer than London in April, but this is not a month to assume every day will be hot. Days reach 25°C about 10% of the time, while 30°C heat is unusual. That makes April a sensible choice if you prefer walking around without persistent high temperatures. Wear light clothes when it is warm, but carry a jumper or light jacket for evenings: the colder nights can fall to 12.6°C or below. If a warmer day arrives, leave room for a break at midday rather than keeping to a rigid schedule. This balance suits travellers who value comfortable daytime weather more than long, reliably hot days by the water.

Keep outdoor plans flexible

Expect useful sunshine, not an uninterrupted run of clear skies. April averages about 6 hours of sunshine within 11.1 hours of daylight, so there is room for outdoor plans without assuming the whole day will be sunny. About 8 days have measurable rain; a light waterproof and an indoor alternative are sensible precautions. That figure does not mean those days are complete washouts, but it is enough to avoid making every plan weather-dependent. The sea averages 21.9°C, classed as bracing rather than comfortably warm. Swimming can still be part of the trip if you tolerate cooler water, but April is a less convincing choice if warm sea bathing is your main reason to travel.