Portsea Weather Forecast
- 12
- 20
Windy
- 7
- 14
Shower
- 10
- 17
Shower
- 9
- 13
Shower
- 9
- 15
Shower
- 9
- 16
Shower
- 9
- 17
Shower
Today 19 Sep Mornington Peninsula
Partly cloudy. Very high chance of showers, most likely in the evening. The chance of a thunderstorm in the late afternoon and evening in the east. Damaging winds possible. Winds northerly 25 to 40 km/h increasing to 40 to 60 km/h in the morning then turning west to northwesterly 25 to 40 km/h in the early afternoon.
Portsea Temperature Statistics View More
September Temperature
Avalon Airport (39km)
Lowest 6 September, 2025
-1.4 °CAverage September
12.4 °CHighest 15 September, 2025
25.7 °C
Climate (2020–Present)
Avalon Airport (39km)
Average Low 2020–2025
9.7 °CAverage 2020–2025
14.5 °CAverage High 2020–2025
20.4 °C