Perth weather by month & the best time to visit
Australia · major coastal city · Mediterranean climate
The best time to visit Perth is March — its sunniest month (Sunshine Score 95/100), with November and April close behind. Perth averages about 3,335 hours of sunshine a year. Daytime highs around 32°C / 90°F and roughly 20 mm of rain in March.
When is the best time to visit Perth?
For sunshine, the best time to visit Perth is March, then November and April. The dullest month is July (59/100, 114 mm of rain). The full month-by-month picture is in the table below.
How sunny is Perth?
Perth is one of the sunniest places on Earth: about 3,335 hours of sunshine a year. March (95/100) is noticeably better than July (59). It ranks #41 of 118 destinations in Australia for annual sunshine, above the national median of 3,071 hours. Rain has a clear season: the wettest stretch, around July, carries about 50% of the annual 610 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 66 | 35° / 95°F | 18° / 64°F | 22 mm | 13 | 25° / 77°F |
| February | 67 | 35° / 95°F | 18° / 64°F | 16 mm | 12 | 25° / 77°F |
| March | 95 | 32° / 90°F | 16° / 61°F | 20 mm | 10 | 23° / 73°F |
| April | 93 | 27° / 81°F | 13° / 55°F | 32 mm | 6 | 21° / 70°F |
| May | 85 | 22° / 72°F | 10° / 50°F | 74 mm | 4 | 20° / 68°F |
| June | 68 | 18° / 64°F | 8° / 46°F | 95 mm | 3 | 19° / 66°F |
| July | 59 | 17° / 63°F | 8° / 46°F | 114 mm | 3 | 18° / 64°F |
| August | 67 | 18° / 64°F | 8° / 46°F | 99 mm | 4 | 18° / 64°F |
| September | 79 | 19° / 66°F | 8° / 46°F | 68 mm | 6 | 18° / 64°F |
| October | 93 | 24° / 75°F | 10° / 50°F | 33 mm | 8 | 20° / 68°F |
| November | 95 | 29° / 84°F | 13° / 55°F | 24 mm | 11 | 21° / 70°F |
| December | 87 | 33° / 91°F | 16° / 61°F | 13 mm | 12 | 23° / 73°F |
Sea temperature in Perth by month
The sea off Perth is warmest in January at around 25°C / 77°F, and coolest in July at 18°C / 64°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
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Perth: questions and answers
What kind of destination is Perth?
Perth is a major coastal city in Australia with a Mediterranean climate — the sea reaches 25°C at its warmest and is swimmable (21°C+) about 6 months a year.
How many hours of sunshine does Perth get a year?
Perth gets about 3,335 hours of sunshine a year, at its best around March.
When is the best time to visit Perth?
The sunniest time to visit Perth is March, when the Sunshine Score peaks at 95/100 (with November and April close behind). Expect daytime highs around 32°C / 90°F.
What is the least sunny month in Perth?
July is the least sunny month in Perth, scoring 59/100 with about 114 mm of rain.
What is the sea temperature in Perth?
The sea in Perth ranges from about 18°C (July) to 25°C (January). Month-by-month sea temperatures are on this page.
How strong is the sun in Perth?
The typical midday UV index in Perth peaks around 13 (extreme) in January, easing to about 3 (moderate) in June. Month-by-month midday UV values are in the UV column of the table on this page.
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