Cassie Rock Weather Forecast

    • 13
    • 18

    Shower or two

    • 12
    • 19

    Possible shower

    • 13
    • 18

    Possible shower

    • 11
    • 19

    Cloud clearing

    • 11
    • 21

    Mostly sunny

    • 15
    • 22

    Partly cloudy

    • 13
    • 19

    Sunny

Today 22 Aug Sydney

Partly cloudy. Patchy morning fog. Medium chance of showers, becoming less likely late this evening. Light winds becoming southeasterly 15 to 20 km/h in the early afternoon then becoming light in the late afternoon.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
Northeasterly 15 to 20 knots, reaching up to 30 knots offshore in the evening.
Seas
1 to 2 metres.
1st Swell
Northeasterly 1.5 metres, increasing to 2 to 2.5 metres around midday.
Weather
Cloudy. 90% chance of showers. The chance of a thunderstorm in the morning and afternoon.
Weather Situation
A trough lies near the coast while a high pressure system over the southwestern Tasman Sea is slowly drifting eastwards, bringing east to northeasterly winds along the coast. The trough will continue to move offshore today, while another trough brushes the coast on Saturday, with fresh southerly winds in its wake. These two troughs may interact and form an offshore low pressure system before heading further eastwards, then winds will tend northerly early next week as a high pressure ridge drifts across the state. Then, a series of cold fronts looks set to cross the 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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