Weather in Port Douglas in March

Shoulder season. March sits in between. You will get good days and you will lose some. You should expect rain on 23 days of the month, which is more days wet than dry.

March ranks 9 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.

Rain on 23 of the month's 31 days, 10 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 86% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest March day reached 32.6 °C and the coldest night fell to 23 °C, and the wettest single day dropped 154 mm — roughly 38% of the month's rain in one day.

March is moderately variable: 103 mm in the driest year against 1003 mm in the wettest, around an average of 406 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 9.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 86% is the real story though — it is the number that decides how the day feels, not the 28.5 °C.

How March sits in the year

Temperatures hold steady either side: 29.4 °C in February, 28.5 here, 27.4 in April. Nothing about the timing within the month matters much. Rain is the thing that moves: April brings 5 days less of it, so pushing the dates later buys drier weather.

Daylight in March

Port Douglas sits close enough to the equator that daylight barely moves all year — 12.2 hours in March, 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 28.8 °C in March — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

March 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 close enough to be a coin toss — 2.3 °C warmer, 9 days less rain.

So: March is a compromise. August is 37 points better and is what Port Douglas is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Port Douglas

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