Cassie Rock Weather Forecast

    • 12
    • 19

    Possible shower

    • 12
    • 18

    Mostly sunny

    • 11
    • 19

    Sunny

    • 12
    • 21

    Sunny

    • 15
    • 22

    Partly cloudy

    • 12
    • 19

    Mostly sunny

    • 12
    • 17

    Partly cloudy

Today 23 Aug Sydney

Partly cloudy. Slight chance of a shower, most likely in the afternoon. Winds south to southwesterly 25 to 35 km/h.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
West to southwesterly 15 to 20 knots tending south to southwesterly 25 to 30 knots in the late morning and afternoon.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres around midday.
1st Swell
Southerly below 1 metre, increasing to 1 to 2 metres by early evening.
Weather
Partly cloudy. 70% chance of showers. The chance of a thunderstorm.
Weather Situation
A trough lies off the NSW coast, bringing northwesterly to northeasterly winds to NSW waters. The trough is set to move east over the Tasman Sea while a ridge forms along the NSW coast in its wake, bringing fresh to strong southwesterly winds. This ridge will persist through early next week, before winds turn north to northwesterly ahead of a cold front set to cross coastal waters mid next week.
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  • Temperature Forecast Bureau of Meteorology

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Cassie Rock Temperature Statistics View More

August Temperature

Terrey Hills (10km)

  • Lowest 18 August, 2025

    5.1 °C

  • Average August

    11.6 °C

  • Highest 5 August, 2025

    20.6 °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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