Weather in Port Douglas in May

A good month. May is a solid month to be in Port Douglas. Highs average 26.1 °C, lows 22.6 °C, and rain falls on 14 days — nothing in the month is working against you.

May ranks 6 of 12 in Port Douglas: past the worst of the year but short of August, which is the month to book if the dates are open.

This is persistent light rain rather than storms: 14 wet days but only 2 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. 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; the day barely swings — 3.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 28.9 °C and the coldest night fell to 17.3 °C, and the wettest single day dropped 75 mm — roughly 91% of the month's rain in one day.

May is moderately variable: 9 mm in the driest year against 176 mm in the wettest, around an average of 82 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 10.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 27.4 °C in April, 26.1 here, 25.1 in June. Nothing about the timing within the month matters much.

Daylight in May

Port Douglas sits close enough to the equator that daylight barely moves all year — 11.4 hours in May, against a range of just 1.9 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 26.6 °C in May — warm enough to stay in as long as you like. The sea peaks at 29.2 °C in February and bottoms out at 24.7 °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.

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

May in Port Douglas versus nearby

If Port Douglas is one option among several, the nearby comparison is worth making. Cairns is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Townsville is a better bet in May — 2 °C warmer, 9 days less rain.

So: May works, with August the better month by 16 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Port Douglas

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