Weather in Cairns in August 2025
Average weather
Average temperature in Cairns in August
Going from a maximum of +24°C during the day to a minimum of +18°C during the night, the temperature in August averages around +23°C.
The average maximum temperature goes up 17% by the end of the month, compared with the beginning of the month, from +23°C to +24°C.
Is Cairns warm or cold in August?
Cairns is typically warm in August.
Maximum temperatures go up compared to the previous month from +23°C to +24°C. The minimum temperature also goes up from +19°C to +19°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the coolest months in Cairns, here is the comparison with other months:
Water temperature in Cairns in August
Water in Cairns in August is Comfortable. It varies from +23°C to +25°C, with an average of +24°C. This is almost similar to the air temperature, which averages +24°C.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Cairns in August?
Climate in Cairns in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +24°C | +26°C | ||||
| Min. temperature | ||||||
| +10°C | +10°C | +10°C | ||||
| Max. temperature | ||||||
| +31°C | +31°C | +33°C | ||||
| Rainfall | ||||||
| 31 mm | 27 mm | 20 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +24°C | +24°C | +25°C | ||||
| Humidity | ||||||
| 75% | 74% | 72% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 7 | 8 | 8 | ||||
| Cloudy days | ||||||
| 12 | 11 | 12 | ||||
| Rainy days | ||||||
| 12 | 12 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +23°C to +24°C during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 31 mm to 27 mm. It feels drier, as humidity decreases from 75% to 74%. The average wind speed doesn’t change much during August, staying around 3 m/s. The good news is there are likely to be more sunny days in August, from 7 to 8.
But maybe it is worth considering traveling in September as the weather gets better.
Wind
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cairns is gradually decreasing during August, going from 5 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Cairns?
Climate Change over Years
The climate in Cairns in August has not changed much over the last 43 years.
The average temperature was the lowest in 1982 (+24°C) and the highest in 2013 (+30°C). The driest year was 2002 with only 513 mm of rainfall, and the wettest year was 2023 with 3123 mm.
FAQ
Is August a good time to visit Cairns?
Can you sunbathe in Cairns in August?
Can you swim in Cairns in August?
Is Cairns rainy in August?
Is it sunny in Cairns in August?
Other cities in Australia
Monthly weather in Cairns
Source of the data
For this page, we’ve looked at the typical weather in Cairns, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.