Cassie Rock Weather Forecast
- 17
- 22
Sunny day. Late shower or two
- 11
- 16
Partly cloudy
- 11
- 17
Partly cloudy
- 10
- 21
Sunny
- 13
- 25
Sunny
- 14
- 28
Sunny
- 17
- 24
Becoming cloudy
Today 15 Sep Sydney
Sunny day. Medium chance of showers late this afternoon and evening. Light winds becoming south to southeasterly 20 to 30 km/h in the middle of the day.
Sydney Coastal Waters
Broken Bay to Port Hacking- Wind
- North to northwesterly 15 to 20 knots shifting southerly 15 to 25 knots in the late morning. Winds reaching up to 30 knots in the evening.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1.5 to 2.5 metres by early evening.
- 1st Swell
- Southerly below 1 metre, increasing to 1.5 metres later in the evening.
- Weather
- Sunny day. 70% chance of showers late this afternoon and evening.
- Weather Situation
- Northerly winds will increase during today ahead of a trough bringing a southerly change to most of the coast during today. After this, southerly winds will persist as a ridge of high pressure extends across from the west.
Cassie Rock Temperature Statistics View More
September Temperature
Terrey Hills (10km)
Lowest 10 September, 2026
8.1 °CAverage September
16.2 °CHighest 5 September, 2026
30.8 °C
Climate (2021–2026)
Terrey Hills (10km)
Average Low 2021–2026
13.6 °CAverage 2021–2026
17.1 °CAverage High 2021–2026
21.9 °C