Johnstons Bay Weather Forecast
- 11
- 17
Mostly sunny
- 9
- 20
Sunny
- 9
- 20
Sunny
- 10
- 18
Shower or two
- 11
- 19
Shower or two
- 12
- 19
Shower or two
- 13
- 19
Shower or two
Today 12 Jul Sydney
Slight chance of a shower in the early morning. The chance of a thunderstorm in the outer west in the early morning. Sunny day. Winds north to northwesterly 15 to 20 km/h tending west to northwesterly 15 to 25 km/h during the morning.
Sydney Enclosed Waters
Sydney Harbour, Pittwater and Botany Bay- Wind
- West to northwesterly 10 to 15 knots decreasing to about 10 knots in the late evening.
- Seas
- Below 0.5 metres.
- Weather
- Mostly sunny.
- Weather Situation
- North to northwesterly winds prevail early this morning ahead of a cold front approaching from the west. The cold front will cross the Sydney Waters during mid-morning, bringing fresh westerly winds in its wake. West to northwesterly winds are forecast to maintain over early next week as a series of fronts and troughs brush the south of the state, ahead of the next trough that may brush the Sydney Waters during mid week, bringing a fresh southerly change.
Johnstons Bay Temperature Statistics View More
July Temperature
Sydney (Observatory Hill) (1km)
Lowest 11 July, 2026
8.3 °CAverage July
13.8 °CHighest 2 July, 2026
22.9 °C
Climate (2021–2026)
Sydney (Observatory Hill) (1km)
Average Low 2021–2026
14.9 °CAverage 2021–2026
18.4 °CAverage High 2021–2026
23.6 °C