Sylvania Weather Forecast

    • 22
    • 27

    Possible shower

    • 21
    • 31

    Possible shower or storm

    • 23
    • 30

    Possible shower

    • 20
    • 28

    Shower or two

    • 19
    • 27

    Partly cloudy

    • 19
    • 23

    Shower or two

    • 18
    • 23

    Cloudy

Today 20 Dec Sydney

Partly cloudy. Medium chance of showers, most likely in the morning and afternoon. The chance of a thunderstorm in the afternoon and early evening. Light winds becoming east to northeasterly 15 to 20 km/h in the middle of the day then becoming light in the evening.

Sydney Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
South to southwesterly about 10 knots tending south to southeasterly 10 to 15 knots in the morning then turning east to northeasterly in the middle of the day.
Seas
Below 0.5 metres.
Weather
Partly cloudy. The chance of a thunderstorm in the afternoon and early evening.
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  • Temperature Forecast Bureau of Meteorology

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Sylvania Temperature Statistics View More

December Temperature

Sydney Airport (9km)

  • Lowest 2 December, 2025

    13.4 °C

  • Average December

    22.5 °C

  • Highest 6 December, 2025

    39.2 °C

Climate (2020–Present)

Sydney Airport (9km)

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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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