Johnstons Bay Weather Forecast

    • 11
    • 22

    Sunny

    • 12
    • 25

    Sunny day. Shower or two

    • 17
    • 22

    Sunny

    • 9
    • 21

    Mostly sunny

    • 11
    • 23

    Possible shower developing

    • 11
    • 19

    Shower or two

    • 10
    • 21

    Sunny

Today 18 Sep Sydney

Mostly sunny. Winds west to southwesterly 15 to 20 km/h shifting northeasterly in the late morning then becoming light in the evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
West to southwesterly 10 to 15 knots tending easterly in the middle of the day then tending north to northeasterly 15 to 20 knots in the late afternoon.
Seas
Below 0.5 metres.
Weather
Sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Johnstons Bay Temperature Statistics View More

September Temperature

Sydney (Observatory Hill) (1km)

  • Lowest 1 September, 2025

    9.3 °C

  • Average September

    17.2 °C

  • Highest 8 September, 2025

    29 °C

Climate (2020–Present)

Sydney (Observatory Hill) (1km)

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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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