Third Rocks Weather Forecast
- 12
- 20
Sunny
- 13
- 20
Possible shower
- 12
- 19
Partly cloudy
- 13
- 19
Partly cloudy
- 11
- 18
Possible shower
- 11
- 19
Possible shower
- 13
- 18
Partly cloudy
Today 22 Sep Perth
Mostly sunny. The chance of fog early this morning, mainly about the hills. Light winds becoming southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening.
Perth Local Waters
Two Rocks to Dawesville, inshore from Rottnest Island- Wind
- South to southwesterly 10 to 15 knots decreasing to about 10 knots in the morning.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 1.5 to 2.5 metres.
- Weather
- Mostly sunny.
- Weather Situation
- A ridge sits over the local waters, weakening tonight and strengthening late Tuesday ahead of the next cold front on Thursday.
Third Rocks Temperature Statistics View More
September Temperature
Garden Island (8km)
Lowest 1 September, 2026
10.2 °CAverage September
16.7 °CHighest 16 September, 2026
29.3 °C
Climate (2021–2026)
Garden Island (8km)
Average Low 2021–2026
15.1 °CAverage 2021–2026
18.9 °CAverage High 2021–2026
23.3 °C