Weather in Perth in April

Prime time. April is about as good as Perth gets. Highs average 23.2 °C, lows 17.6 °C, and rain falls on 6 days — nothing in the month is working against you.

April ranks 6 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 6 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: it never really gets hot: not one day in an average April reaches 30 °C; the day barely swings — 5.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest April day reached 31.3 °C and the coldest night fell to 12.8 °C, and the wettest single day dropped 42 mm — roughly 124% of the month's rain in one day.

April is moderately variable: 1 mm in the driest year against 80 mm in the wettest, around an average of 34 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind sits around 17 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 69%.

How April sits in the year

The month is on the way down: 2.7 °C cooler than March, with May dropping another 2.3 °C. The first week and the last are not the same trip.

Daylight in April

11.3 hours of daylight, losing 0.9 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 22.6 °C in April — comfortable for a proper swim. This is the warmest the water gets all year.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

April 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 — within a degree on temperature, 1 day more rain. Geraldton is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: April works, with January the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Perth

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