Mosman Bay Weather Forecast

    • 11
    • 21

    Clear

    • 12
    • 23

    Sunny

    • 13
    • 26

    Shower or two

    • 15
    • 24

    Possible late shower

    • 11
    • 18

    Shower or two. Becoming windy

    • 10
    • 19

    Shower or two

    • 9
    • 23

    Sunny

Today 12 Sep Sydney

Clear. Winds east to northeasterly 15 to 25 km/h becoming light in the evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
East to northeasterly 10 to 15 knots tending north to northeasterly below 10 knots in the evening.
Seas
Below 0.5 metres.
Weather
Clear.
Weather Situation
A high pressure system is gradually drifting east across the Tasman Sea this weekend. A trough and cold front look set to bring southerly winds to Sydney Waters on Tuesday, which will freshen or strengthen later Tuesday and Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mosman Bay Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (3km)

  • Lowest 9 September, 2026

    9.8 °C

  • Average September

    17.4 °C

  • Highest 5 September, 2026

    32.1 °C

Climate (2021–2026)

Sydney (Observatory Hill) (3km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    14.9 °C

  • Average 2021–2026

    18.5 °C

  • Average High 2021–2026

    23.6 °C
Get WillyWeather+ to remove ads