Perth has a hot-summer Mediterranean climate, which basically means long, sunny, dry summers and mild, wetter winters. That’s why so many of the best Perth activities happen outdoors: beaches, river walks, Rottnest Island days, and sunset sessions almost year-round.

It’s also a city where Perths weather can change quickly within a day, especially in summer, when the famous Fremantle Doctor (a cooling afternoon sea breeze) often arrives after a hot morning and takes the edge off the heat.

Was 2025 really Perth’s hottest year?

Yes, 2025 was exceptionally warm in Perth. The Bureau of Meteorology reports Perth Metro’s annual mean maximum temperature was 26.2°C and a low of 13.7 °C, the highest at the current Perth official site in 30 years and also the highest in Perth’s longer composite record dating back to 1897.

Perth Weather at a Glance

• Sunniest months: Typically late spring through early autumn (Oct–Apr)
• Wettest period: Most rainfall falls between May and October (late autumn to mid-spring).
• Annual rainfall (Perth Metro long-term average): ~718 mm.

Perth Weather in Spring

Spring begins in September in Perth, and from this time on, the weather quickly warms to fine sunny conditions for the many months ahead. For the most part, spring is sunny and warm, especially from October and November, and the weather is generally pleasant and rain is usually minimal or absent.

Spring is perfect for seeing Western Australia’s famous wildflowers, with Kings Park in full bloom. Outdoor festivals, river cruises, and cycling around Rottnest Island are especially enjoyable in spring.

Average Perth Spring Temperatures
September: Daytime 18-21°C	Overnight Minimum 9-12°C
October: Daytime 21-24°C	Overnight Minimum 9-12°C
November: Daytime 24-27°C	Overnight Minimum 12-15°C

Perth Weather in Summer

The official start of summer in Perth is December, finishing three months later at the end of February. The weather is warm to hot over the summer months, although the hottest months are usually January and February. The weather is usually dry, and rain at this time of year is very unusual. Perth also enjoys a refreshing afternoon sea breeze known as the Fremantle Doctor, which brings welcome relief on hot days.

This is the time to go to the beach, over the summer months! Head to Cottesloe, Scarborough, or City Beach for swimming, surfing, and sunsets. Be prepared for the “Fremantle Doctor”, the cooling sea breeze that usually arrives in the afternoon over the city. 

Average Perth Summer Temperatures
December: Daytime 27-30°C	Overnight Minimum 15-18°C
January: Daytime 30-33°C	Overnight Minimum 18-21°C
February: Daytime 30-33°C	Overnight Minimum 18-21°C

Perth Weather in Autumn

Autumn begins in March and finishes at the end of May, although autumn in Perth is not typical of autumn’s most people would be familiar with. Autumn in Perth is like an extension of summer, or perhaps a second spring. With warm sunny days and cooler nights, there is still plenty of sunshine left before the onset of winter. Although the Perth weather is still mostly fine, there may be an occasional shower or humidity.

A great time for wine tours in the Swan Valley and being outdoors, along the Swan River. Autumn also brings vibrant events and festivals, making it an excellent season for culture and food lovers.

Average Perth Autumn Temperatures
March: Daytime 27-30°C	Overnight Minimum 15-18°C
April: Daytime 24-27°C	Overnight Minimum 12-15°C
May: Daytime 21-24°C	Overnight Minimum 9-12°C

Perth Weather in Winter

The mild Perth winter begins at the start of June and finishes at the end of August. It is generally a rainy season, mingled with cool sunny days. There are however occasional storms, characterised by downpours of rain, lightning and thunder.

During the colder months, look to explore Perth’s cultural attractions such as the WA Museum Boola Bardip, Art Gallery of WA, attend the AQWA and or some cosy cafés in the suburb of Northbridge. It’s also the best time to head out on whale-watching tours based out of Fremantle.

Average Winter Temperatures
June: Daytime 18-21°C	Overnight Minimum 9-12°C
July: Daytime 15-18°C	Overnight Minimum 6-9°C
August: Daytime 18-21°C	Overnight Minimum 9-12°C

Perths amazing climate contributes to its strong tourism demand. For first-time visitors and tourists, it might be better to come to Perth in the summer (warmer) months. Whether you’re a first-time guest or returning for another holiday, Perth’s inviting weather ensures there’s always something exciting waiting for you on the west coast. There is always lots to see and do, so keep yourself busy by doing a variety of other things, here is a list of my top attractions, in Perth.

Perth’s climate is a big reason the city is such an easy holiday destination: even outside summer, you can often still fit in beach walks, sunset views, and outdoor dining. And if you’re planning your itinerary around Perth weather, remember the local trick: do active stuff in the morning, then enjoy the coast when the afternoon sea breeze arrives.

Note: that Perth’s weather is recorded and forecast in degrees Celsius.