Sydney weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: April – May, July – February
What is the weather like in Sydney in August?
In August, Sydney is mild: daytime highs average 17 °C, and nights cool down to about 10 °C. The sea averages 18.3 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 44 mm. All in all, August is an excellent month for a holiday in Sydney.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 80 | 87 | 93 |
| Day | 16° | 17° | 20° |
| Night | 10° | 10° | 12° |
| Sea | 19° | 18° | 19° |
| Sun | 7 h | 8 h | 9 h |
| Rain days | 6 | 6 | 7 |
More details for August
- Daylight
- 10 h 50 min06:35 – 17:25
- UV index
- 4 · moderateclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 16 km/haverage daily peak
- Cloud cover
- 34 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+10Australia/Sydney
How the score comes together
- Temperatureweight 50 %91 %
- Sunshineweight 20 %78 %
- Few rainy daysweight 30 %86 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Sunscreen
- A jumper for the evenings
Sydney in August: quick answers
Is Sydney hot in August?
No. In August, Sydney is mild: daytime highs average 17 °C and nights drop to about 10 °C.
Can you swim in Sydney in August?
Only if you don't mind cold water: in August the sea averages just 18.3 °C. Comfortable swimming is possible from November to May.
Does it rain much in Sydney in August?
Rain falls on about 6 days, adding up to 44 mm.
Sydney month by month
The whole year in SydneyAll destinations: Australia
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)