The Brothers Weather Forecast
- 17
- 27
Sunny
- 17
- 29
Sunny
- 19
- 27
Becoming windy. Sunny
- 17
- 31
Sunny
- 17
- 34
Sunny
- 21
- 37
Mostly sunny
- 25
- 33
Partly cloudy
Today 9 Dec Perth
Sunny. Winds southeasterly 15 to 20 km/h tending southwesterly 25 to 35 km/h in the middle of the day then tending southeasterly 20 to 30 km/h in the late evening.
Perth Local Waters
Two Rocks to Dawesville, inshore from Rottnest Island- Wind
- South to southeasterly 15 to 20 knots tending south to southwesterly 15 to 25 knots in the morning then turning southeasterly 15 to 20 knots in the late evening. Winds reaching up to 30 knots in the late afternoon.
- Seas
- 1 to 1.5 metres, increasing to 1.5 to 2 metres during the afternoon.
- 1st Swell
- Southwesterly around 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing to around 1 metre during the afternoon.
- Weather
- Sunny.
- Weather Situation
- A new ridge to the south of the Local Waters will persist through Tuesday, before a west coast trough deepens on Wednesday. The west coast trough will push inland on Thursday ahead of a new ridge approaching from the west.
The Brothers Temperature Statistics View More
December Temperature
Garden Island (9km)
Lowest 4 December, 2025
16.4 °CAverage December
20.4 °CHighest 1 December, 2025
36.8 °C
Climate (2020–Present)
Garden Island (9km)
Average Low 2020–2025
15.1 °CAverage 2020–2025
18.9 °CAverage High 2020–2025
23.4 °C