Gymea Bay Weather Forecast

    • 18
    • 29

    Sunny

    • 20
    • 34

    Sunny

    • 23
    • 36

    Partly cloudy

    • 20
    • 23

    Shower or two. Becoming windy

    • 18
    • 24

    Cloudy

    • 20
    • 29

    Sunny

    • 20
    • 25

    Cloudy

Today 4 Dec Sydney

Sunny. Light winds becoming northwest to northeasterly 20 to 30 km/h in the middle of the day then becoming light in the late evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
North to northeasterly 15 to 20 knots increasing to 20 to 25 knots in the late afternoon. Winds reaching up to 30 knots in the evening.
Seas
Around 1 metre, increasing to 1.5 to 2.5 metres during the afternoon.
1st Swell
Southerly below 1 metre.
Weather
Sunny.
Weather Situation
A high pressure system lies over the Tasman Sea, extending a ridge over the state. Northerly winds strengthening by the weekend, with a brief weak southerly change expected along the south coast on Friday. Then, a cold front will cross the state during the weekend, bringing a fresh to strong southerly wind change over coastal waters in its wake.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Gymea Bay Temperature Statistics View More

December Temperature

Sydney Airport (13km)

  • Lowest 2 December, 2025

    13.4 °C

  • Average December

    18.6 °C

  • Highest 1 December, 2025

    26.5 °C

Climate (2020–Present)

Sydney Airport (13km)

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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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