Weather in Cairns in April

Shoulder season. April is shoulder season in Cairns — cheaper, quieter, and a genuine gamble. The heat itself is manageable at 28.1 °C, but 87% humidity is what you will actually feel.

April ranks 8 of 12 in Cairns: past the worst of the year but short of August, which is the month to book if the dates are open.

Rain on 18 days, 6 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 87% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 5.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest April day reached 34.2 °C and the coldest night fell to 18.1 °C, and the wettest single day dropped 135 mm — roughly 71% of the month's rain in one day.

April is moderately variable: 24 mm in the driest year against 639 mm in the wettest, around an average of 191 mm. Roughly two Aprils in three land near that average, and the third does something else entirely.

Wind is light at 6.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 87% is the real story though — it is the number that decides how the day feels, not the 28.1 °C.

How April sits in the year

Temperatures hold steady either side: 29.4 °C in March, 28.1 here, 26.7 in May. Nothing about the timing within the month matters much. Rain has already shifted: 5 days fewer than March had.

Daylight in April

April sits at the dark end of Cairns's year — 11.7 hours of daylight against 13.1 at midsummer, losing 0.4 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 27.7 °C in April — warm enough that the water offers no relief from the heat. 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

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

April in Cairns versus nearby

If Cairns is one option among several, the nearby comparison is worth making. Port Douglas 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 April — within a degree on temperature, 11 days less rain.

So: April is a compromise. August is 36 points better and is what Cairns 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 Cairns

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