Weather in Sydney in August 2025
Average weather
Average temperature in Sydney in August
Going from a maximum of +26°C during the day to a minimum of +7°C during the night, the temperature in August averages around +20°C.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +21°C to +19°C.
Is Sydney warm or cold in August?
Sydney is typically mild in August.
Maximum temperatures go up compared to the previous month from +17°C to +18°C. The minimum temperature also goes up from +9°C to +9°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the coolest months in Sydney, here is the comparison with other months:
Water temperature in Sydney in August
Water in Sydney in August is Fresh. It varies from +17°C to +21°C, with an average of +19°C. Note that the air temperature is lower than the water temperature, averaging around +18°C.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Sydney in August?
Climate in Sydney in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +17°C | +18°C | +20°C | ||||
| Min. temperature | ||||||
| +2°C | +4°C | +6°C | ||||
| Max. temperature | ||||||
| +26°C | +29°C | +34°C | ||||
| Rainfall | ||||||
| 48 mm | 53 mm | 46 mm | ||||
| Wind | ||||||
| 3 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +19°C | +19°C | +19°C | ||||
| Humidity | ||||||
| 67% | 63% | 62% | ||||
| Air pressure | ||||||
| 1018 HPa | 1017 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 14 | 15 | 13 | ||||
| Cloudy days | ||||||
| 5 | 4 | 4 | ||||
| Rainy days | ||||||
| 11 | 11 | 11 | ||||
| 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 +17°C to +18°C during the day. Prepare for more rain. Average rainfall goes from 48 mm to 53 mm. It feels drier, as humidity decreases from 67% to 63%. Winds are stronger in comparison to July, going up from 3 m/s to 4 m/s on average. The good news is there are likely to be more sunny days in August, from 14 to 15.
September brings much the same weather, it remains good.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Sydney is gradually increasing during August, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Sydney?
Climate Change over Years
The climate in Sydney in August has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+20°C) and the highest in 2019 (+23°C). The driest year was 2006 with only 423 mm of rainfall, and the wettest year was 2022 with 2786 mm.
FAQ
Is August a good time to visit Sydney?
Can you sunbathe in Sydney in August?
Can you swim in Sydney in August?
Is Sydney rainy in August?
Is it sunny in Sydney in August?
Other cities in Australia
Monthly weather in Sydney
Source of the data
For this page, we’ve looked at the typical weather in Sydney, 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.