Johnstons Bay Weather Forecast
- 9
- 18
Partly cloudy
- 7
- 19
Sunny
- 8
- 20
Sunny
- 11
- 20
Partly cloudy
- 9
- 22
Mostly sunny
- 10
- 20
Sunny
- 11
- 24
Sunny
Today 30 Aug Sydney
Partly cloudy. Slight chance of a shower along the coastal fringe, near zero chance elsewhere. Winds west to northwesterly 20 to 30 km/h turning southwesterly 25 to 40 km/h in the morning then decreasing to 20 to 30 km/h in the early afternoon.
Sydney Enclosed Waters
Sydney Harbour, Pittwater and Botany Bay- Wind
- Northwesterly 15 to 20 knots turning southwesterly 15 to 25 knots in the middle of the day.
- Seas
- Below 0.5 metres.
- Weather
- Partly cloudy.
- Weather Situation
- A strong cold front over the east of the state will move offshore today, and will be followed by a high pressure ridge that will persist through to mid next week.
Johnstons Bay Temperature Statistics View More
August Temperature
Sydney (Observatory Hill) (1km)
Lowest 18 August, 2025
6.6 °CAverage August
13.7 °CHighest 5 August, 2025
22.9 °C
Climate (2020–Present)
Sydney (Observatory Hill) (1km)
Average Low 2020–2025
14.7 °CAverage 2020–2025
18.2 °CAverage High 2020–2025
23.4 °C