Weather in Perth in March

Prime time. If you get to pick your dates, March is the one. Highs average 25.9 °C, lows 19.2 °C, and rain falls on 3 days — nothing in the month is working against you.

March ranks 4 of 12 in Perth: past the worst of the year but short of January, which is the month to book if the dates are open.

Rain falls on only 3 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 4 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest March day reached 37.2 °C and the coldest night fell to 13.3 °C, and the wettest single day dropped 32 mm — roughly 160% of the month's rain in one day.

This is the volatile part. March rainfall has ranged from 0 mm to 65 mm across the twenty years measured — a 65 mm spread around an average of 20 mm. The average is real but almost no individual March looks like it, so treat the figure as the middle of a wide range rather than a forecast.

Wind sits around 18.6 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 65%.

How March sits in the year

Temperatures hold steady either side: 26.9 °C in February, 25.9 here, 23.2 in April. Nothing about the timing within the month matters much.

Daylight in March

12.3 hours of daylight, losing 1 hours across the month. That is between Perth's extremes of 14.2 and 10.1 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 22.9 °C in March — comfortable for a proper swim. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

March in Perth versus nearby

If Perth is one option among several, the nearby comparison is worth making. Bunbury is close enough to be a coin toss — 2.9 °C warmer, the same number of rain days. Geraldton is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: March is effectively as good as it gets here — 3 points behind January, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Perth

See all twelve months in Perth, or where else to go in March.