Johnstons Bay Weather Forecast

    • 16
    • 26

    Possible late shower

    • 18
    • 24

    Possible morning shower

    • 17
    • 25

    Cloudy

    • 18
    • 28

    Partly cloudy

    • 19
    • 30

    Possible shower or storm

    • 21
    • 30

    Shower or two

    • 20
    • 28

    Partly cloudy

Today 31 Dec Sydney

Partly cloudy. Medium chance of showers in the afternoon and evening. The chance of a thunderstorm in the afternoon and early evening. Light winds becoming southeasterly 15 to 25 km/h in the middle of the day.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
Variable below 10 knots becoming southeasterly 10 to 15 knots in the middle of the day.
Seas
Below 0.5 metres.
Weather
Partly cloudy. The chance of a thunderstorm in the late afternoon and evening.
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

    22.2 °C

  • Highest 19 December, 2025

    42.2 °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

    23.5 °C
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