Big Marley Beach Weather Forecast

    • 22
    • 34

    Possible shower or storm

    • 24
    • 29

    Shower or two

    • 20
    • 28

    Becoming windy. Mostly sunny

    • 20
    • 28

    Partly cloudy

    • 19
    • 22

    Shower or two

    • 17
    • 22

    Partly cloudy

    • 17
    • 24

    Mostly sunny

Today 21 Dec Sydney

Partly cloudy. Medium chance of showers. The chance of a thunderstorm in the late afternoon and evening. Winds south to southwesterly 15 to 20 km/h becoming light in the late evening.

Illawarra Coastal Waters

Port Hacking to Ulladulla
Wind
East to northeasterly 10 to 15 knots, reaching up to 20 knots offshore north of Port Kembla during the afternoon and evening. Winds tending north to northeasterly in the evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres offshore north of Port Kembla by early evening.
1st Swell
Northeasterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore north of Port Kembla.
Weather
Cloudy. The chance of a thunderstorm.
Weather Situation
A high in the Tasman Sea is directing northerly winds along the coast. A cold front will bring a fresh to strong southerly change to the southern half on Monday. This will be followed by another southerly surge on Tuesday through to northern parts of the coast.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Big Marley Beach Temperature Statistics View More

December Temperature

Sydney Airport (19km)

  • Lowest 2 December, 2025

    13.4 °C

  • Average December

    23.1 °C

  • Highest 19 December, 2025

    42.6 °C

Climate (2020–Present)

Sydney Airport (19km)

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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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