Cassie Rock Weather Forecast

    • 13
    • 20

    Clear

    • 13
    • 23

    Late shower or two

    • 17
    • 21

    Sunny

    • 11
    • 21

    Sunny

    • 13
    • 21

    Possible shower developing

    • 11
    • 17

    Shower or two

    • 13
    • 20

    Mostly sunny

Today 18 Sep Sydney

Clear. Winds northeasterly 15 to 20 km/h becoming light in the evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Northeasterly 15 to 20 knots turning northerly in the evening. Winds reaching up to 25 knots offshore in the late evening.
Seas
Around 1 metre, increasing to 1.5 metres later in the evening.
1st Swell
Southerly 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Mostly clear.
Weather Situation
In the wake of a cold front, south to southwesterly winds will tend northerly and strengthen today as a high pressure system drifts across the coastal waters. Winds will shift west to southwesterly again over the weekend as a stronger cold front moves over NSW coastal waters, with southwesterly winds persisting into early next week as a series of fronts brush the south of the state.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cassie Rock Temperature Statistics View More

September Temperature

Terrey Hills (10km)

  • Lowest 1 September, 2025

    7 °C
  • Average September

    15.8 °C
  • Highest 8 September, 2025

    27.7 °C

Climate (2020–Present)

Terrey Hills (10km)

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  • Average Low 2020–2025

    13.4 °C
  • Average 2020–2025

    16.9 °C
  • Average High 2020–2025

    21.7 °C
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