Gannons Bay Weather Forecast

    • 18
    • 24

    Shower or two. Possible storm

    • 20
    • 29

    Possible shower

    • 18
    • 20

    Cloudy

    • 18
    • 20

    Cloudy

    • 18
    • 24

    Partly cloudy

    • 18
    • 27

    Sunny

    • 19
    • 29

    Mostly sunny

Today 13 Dec Sydney

Partly cloudy. The chance of fog in the west in the early morning. Medium chance of showers, most likely in the late afternoon and evening. The chance of a thunderstorm in the afternoon and evening. Light winds becoming east to northeasterly 15 to 25 km/h in the middle of the day then becoming light in the late evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Northeasterly 10 to 15 knots turning north to northwesterly below 10 knots before dawn then tending north to northeasterly 15 to 20 knots in the middle of the day.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Easterly around 1 metre.
Weather
Mostly sunny. The chance of a thunderstorm in the afternoon and evening.
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  • 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

    22.8 °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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