Third Rocks Weather Forecast
- 17
- 28
Sunny
- 18
- 31
Sunny
- 20
- 29
Sunny
- 19
- 31
Mostly sunny
- 17
- 34
Sunny
- 21
- 37
Partly cloudy
- 26
- 35
Partly cloudy
Today 9 Dec Perth
Sunny. Winds southwesterly 25 to 35 km/h turning southeasterly 15 to 25 km/h in the late evening.
Perth Local Waters
Two Rocks to Dawesville, inshore from Rottnest Island- Wind
- Southwesterly 15 to 25 knots, reaching up to 30 knots in the late afternoon. Winds turning south to southeasterly 15 to 20 knots in the evening.
- Seas
- Around 1 metre, increasing to 1.5 to 2 metres during the afternoon.
- 1st Swell
- Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the afternoon.
- Weather
- Sunny.
- Weather Situation
- An inland trough will move closer to the west coast by the weekend where it is expected to deepen. The trough will move offshore on Sunday as a high pressure system moves into the Bight and strengthens.
Third Rocks Temperature Statistics View More
December Temperature
Garden Island (8km)
Lowest 4 December, 2025
16.4 °CAverage December
20.4 °CHighest 1 December, 2025
36.8 °C
Climate (2020–Present)
Garden Island (8km)
Average Low 2020–2025
15.1 °CAverage 2020–2025
18.9 °CAverage High 2020–2025
23.4 °C