Blackwattle Bay Marina Weather Forecast

    • 17
    • 25

    Mostly sunny

    • 11
    • 21

    Sunny

    • 12
    • 25

    Late shower or two

    • 17
    • 22

    Possible early shower

    • 11
    • 23

    Mostly sunny

    • 11
    • 23

    Mostly sunny

    • 11
    • 21

    Partly cloudy

Today 17 Sep Sydney

Mostly sunny. Winds westerly 15 to 25 km/h turning southwesterly 15 to 20 km/h in the late afternoon.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Variable below 10 knots becoming east to southeasterly 10 to 15 knots in the early afternoon then shifting southwesterly below 10 knots in the evening.
Seas
Below 0.5 metres.
Weather
Mostly sunny.
Weather Situation
A front and its associated trough crossing the state will bring a west to southwesterly change to Sydney Waters early Wednesday morning, before the front moves away to the Tasman Sea and the trough continues crossing the northern coastal waters. Then, a ridge of high pressure will drift across the coastal waters midweek ahead of the second cold front that looks set to cross the coast on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Blackwattle Bay Marina Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (2km)

  • Lowest 1 September, 2025

    9.3 °C

  • Average September

    16.9 °C

  • Highest 8 September, 2025

    29 °C

Climate (2020–Present)

Sydney (Observatory Hill) (2km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.2 °C

  • Average High 2020–2025

    23.4 °C
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