The Old Mans Hat Weather Forecast

    • 11
    • 17

    Partly cloudy

    • 11
    • 23

    Sunny

    • 15
    • 27

    Sunny

    • 16
    • 27

    Sunny

    • 18
    • 24

    Becoming cloudy

    • 15
    • 19

    Shower or two

    • 15
    • 21

    Shower or two

Today 17 Sep Sydney

Partly cloudy. Winds south to southwesterly 15 to 25 km/h tending south to southeasterly 15 to 20 km/h in the early afternoon then becoming light in the late afternoon.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
South to southwesterly 15 to 20 knots tending south to southeasterly 10 to 15 knots in the early afternoon then becoming variable below 10 knots in the late afternoon.
Seas
Below 0.5 metres.
Weather
Partly cloudy.
Weather Situation
A strong high over the Great Australian Bight is moving east in the wake of a trough over the Tasman Sea, directing strong and blustery southerly winds over Sydney waters. The winds will ease from the evening as the high moves across the state later in the week and into the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Old Mans Hat Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (9km)

  • 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) (9km)

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  • Average Low 2021–2026

    14.9 °C

  • Average 2021–2026

    18.5 °C

  • Average High 2021–2026

    23.6 °C
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