Johnstons Bay Weather Forecast

    • 19
    • 35

    Sunny

    • 23
    • 36

    Partly cloudy

    • 20
    • 26

    Shower or two

    • 18
    • 26

    Cloudy

    • 19
    • 30

    Mostly sunny

    • 19
    • 26

    Possible shower

    • 18
    • 24

    Shower or two

Today 5 Dec Sydney

Mostly sunny. Light winds becoming west to northwesterly 15 to 25 km/h in the morning then turning north to northeasterly 20 to 30 km/h in the late morning and afternoon.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
North to northwesterly about 10 knots tending northeasterly 15 to 20 knots in the middle of the day then tending northerly 10 to 15 knots in the late evening.
Seas
Below 0.5 metres.
Weather
Mostly sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Johnstons Bay Temperature Statistics View More

December Temperature

Sydney (Observatory Hill) (1km)

  • Lowest 2 December, 2025

    13.3 °C

  • Average December

    18.6 °C

  • Highest 1 December, 2025

    24.6 °C

Climate (2020–Present)

Sydney (Observatory Hill) (1km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.3 °C

  • Average High 2020–2025

    23.4 °C
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