The Old Mans Hat Weather Forecast

    • 18
    • 29

    Sunny

    • 20
    • 34

    Sunny

    • 23
    • 36

    Possible late shower

    • 20
    • 23

    Shower or two

    • 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 Enclosed Waters

Sydney Harbour, Pittwater and Botany Bay
Wind
North to northwesterly about 10 knots tending northeasterly 15 to 20 knots in the middle of the day then tending northerly 10 to 15 knots in the late evening.
Seas
Below 0.5 metres.
Weather
Sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Old Mans Hat Temperature Statistics View More

December Temperature

Sydney (Observatory Hill) (9km)

  • Lowest 2 December, 2025

    13.3 °C

  • Average December

    18 °C

  • Highest 1 December, 2025

    24.6 °C

Climate (2020–Present)

Sydney (Observatory Hill) (9km)

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  • Average Low 2020–2025

    14.7 °C

  • Average 2020–2025

    18.3 °C

  • Average High 2020–2025

    23.4 °C
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