Fort Denison Weather Forecast

    • 10
    • 18

    Cloudy

    • 11
    • 20

    Partly cloudy

    • 11
    • 21

    Mostly sunny

    • 13
    • 23

    Sunny

    • 13
    • 26

    Sunny

    • 15
    • 27

    Shower or two

    • 12
    • 19

    Shower or two

Today 10 Sep Sydney

Cloudy. Slight chance of a shower along the coastal fringe, becoming less likely in the late morning. Near zero chance of rain elsewhere. Winds south to southwesterly 15 to 25 km/h tending south to southeasterly 20 to 30 km/h in the middle of the day then becoming light in the evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Southwesterly 10 to 15 knots turning southerly 15 to 20 knots in the morning.
Seas
Below 0.5 metres.
Weather
Cloudy.
Weather Situation
A trough will move away from the New South Wales coast today, bringing fresh to strong southerly winds over Sydney waters in its wake. Winds will ease and shift south to southeasterly later in the week as another high pressure ridge extends over the region. A high pressure system will then move into the Tasman Sea over the weekend, directing northeasterly winds over Sydney Waters.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Fort Denison Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (2km)

  • Lowest 9 September, 2026

    9.8 °C

  • Average September

    18.2 °C

  • Highest 5 September, 2026

    32.1 °C

Climate (2021–2026)

Sydney (Observatory Hill) (2km)

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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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