Green Island Weather Forecast
- 15
- 19
Mostly sunny
- 15
- 19
Possible morning shower
- 14
- 19
Partly cloudy
- 13
- 19
Possible shower. Windy
- 11
- 17
Shower or two. Wind easing
- 11
- 18
Shower or two
- 13
- 18
Partly cloudy
Today 22 Sep Lower West
Sunny. Light winds becoming southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures in the low 20s.
Perth Local Waters
Two Rocks to Dawesville, inshore from Rottnest Island- Wind
- South to southwesterly about 10 knots.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 1.5 to 2 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.
Green Island Temperature Statistics View More
September Temperature
Rottnest Island (1km)
Lowest 9 September, 2026
11.5 °CAverage September
16.7 °CHighest 16 September, 2026
27.8 °C
Climate (2021–2026)
Rottnest Island (1km)
Average Low 2021–2026
16.1 °CAverage 2021–2026
18.9 °CAverage High 2021–2026
22.8 °C