Gannons Bay Weather Forecast

    • 22
    • 27

    Partly cloudy

    • 22
    • 33

    Possible shower or storm

    • 23
    • 28

    Partly cloudy

    • 20
    • 28

    Partly cloudy

    • 19
    • 27

    Partly cloudy

    • 20
    • 23

    Shower or two

    • 18
    • 23

    Cloudy

Today 20 Dec Sydney

Partly cloudy. Slight chance of a shower. The chance of a thunderstorm in the afternoon and early evening. Winds east to northeasterly 15 to 20 km/h becoming light in the evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
North to northeasterly about 10 knots increasing to 10 to 15 knots in the early afternoon.
Seas
Below 1 metre.
1st Swell
Northeasterly around 1 metre.
Weather
Partly cloudy. The chance of a thunderstorm in the afternoon and evening.
Weather Situation
A high in the Tasman Sea is directing northerly winds over central and northern Coastal Waters while a weak coastal trough brings southerly winds to the remainder. A cold front will bring a fresh to strong southerly change later on Sunday or Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Gannons Bay Temperature Statistics View More

December Temperature

Sydney Airport (14km)

  • Lowest 2 December, 2025

    13.4 °C

  • Average December

    23 °C

  • Highest 6 December, 2025

    39.2 °C

Climate (2020–Present)

Sydney Airport (14km)

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  • Average Low 2020–2025

    14.8 °C

  • Average 2020–2025

    18.6 °C

  • Average High 2020–2025

    23.3 °C
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