Weather in Perth in October

Prime time. If you get to pick your dates, October is the one. Highs average 19.9 °C, lows 14.4 °C, and rain falls on 7 days — nothing in the month is working against you.

October ranks 7 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 on 7 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. 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 October 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 October day reached 31 °C and the coldest night fell to 9.8 °C.

October is moderately variable: 13 mm in the driest year against 60 mm in the wettest, around an average of 32 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind sits around 18.2 km/h — a steady breeze rather than a nuisance, and welcome on the warmer days, and humidity is unremarkable at 73%.

How October sits in the year

The month is on the way up: 1.9 °C warmer than September, and November adds another 2.5 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in October

12.8 hours of daylight, gaining 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 19.2 °C in October — swimmable, but it takes a moment to commit. The sea peaks at 22.9 °C in March and bottoms out at 19 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

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.

October 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, 4 days less rain.

So: October works, with January the better month by 10 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 October.