Johnstons Bay Weather Forecast

    • 19
    • 31

    Sunny

    • 19
    • 25

    Possible shower

    • 19
    • 23

    Showers. Possible storm

    • 19
    • 24

    Showers. Possible afternoon storm

    • 17
    • 28

    Shower or two

    • 20
    • 30

    Mostly sunny

    • 19
    • 25

    Shower or two

Today 9 Dec Sydney

Mostly sunny. The chance of fog in the outer west in the early morning. Slight chance of a shower along the coastal fringe in the evening. Near zero chance of rain elsewhere. Light winds becoming southeast to southwesterly 15 to 25 km/h in the middle of the day then tending south to southeasterly 25 to 35 km/h in the late afternoon.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Variable below 10 knots becoming east to southeasterly 15 to 20 knots in the early afternoon then turning southerly 20 to 30 knots in the evening.
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

December Temperature

Sydney (Observatory Hill) (1km)

  • Lowest 2 December, 2025

    13.3 °C

  • Average December

    22.4 °C

  • Highest 5 December, 2025

    37.8 °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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