Weather in Bunbury in May

A good month. May is a solid month to be in Bunbury. Highs average 20.7 °C, lows 12.3 °C, and rain falls on 12 days — nothing in the month is working against you.

May ranks 8 of 12 in Bunbury: past the worst of the year but short of November, which is the month to book if the dates are open.

Rain on 12 days, 3 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 May reaches 30 °C. Across the twenty years measured, the hottest May day reached 29.1 °C and the coldest night fell to 5.7 °C, and the wettest single day dropped 52 mm — roughly 54% of the month's rain in one day.

May is moderately variable: 33 mm in the driest year against 189 mm in the wettest, around an average of 97 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 11.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How May sits in the year

The month is on the way down: 3.8 °C cooler than April, with June dropping another 2.8 °C. The first week and the last are not the same trip. Rain has already shifted: 5 days more than April had.

Daylight in May

May sits at the dark end of Bunbury's year — 10.4 hours of daylight against 14.3 at midsummer, losing 0.7 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 21.9 °C in May — comfortable for a proper swim. The sea peaks at 22.7 °C in March and bottoms out at 18.7 °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

Shoulder. The value months — prices ease off and you get the place closer to itself. May is the value pick for Bunbury: it scores within 12 points of November without carrying November's prices.

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

May in Bunbury versus nearby

If Bunbury is one option among several, the nearby comparison is worth making. Perth is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Albany is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: May works, with November the better month by 12 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Bunbury

See all twelve months in Bunbury, or where else to go in May.