Portland Weather Forecast
- 10
- 18
Sunny
- 9
- 27
Partly cloudy
- 12
- 18
Partly cloudy
- 11
- 17
Shower or two. Windy
- 10
- 16
Cloudy
- 10
- 17
Cloudy
- 9
- 25
Sunny
Today 11 Dec South West
Sunny. Winds southeasterly 20 to 30 km/h. Daytime maximum temperatures 21 to 27.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- East to southeasterly 15 to 20 knots.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
- 1st Swell
- Southwesterly 2 metres.
- Weather
- Sunny.
- Weather Situation
- A ridge of high pressure extends across Victoria today with the high centre to the south of the Bight forecast to move eastwards across Tasmania. A trough is forecast to extend from NSW into the northeast of Victoria during today, before a more significant trough is forecast to move across the far west on Friday then over the remainder of the state on Saturday. A cold front in expected to move through Bass Strait during Sunday with increasing south to southwesterly flow over the state as a secondary high pressure ridge extends over from the west.
Portland Temperature Statistics View More
December Temperature
Cape Nelson Lighthouse (10km)
Lowest 5 December, 2025
9.7 °CAverage December
15.2 °CHighest 3 December, 2025
25.3 °C
Climate (2020–Present)
Cape Nelson Lighthouse (10km)
Average Low 2020–2025
11.8 °CAverage 2020–2025
14.3 °CAverage High 2020–2025
17.5 °C