Portland Weather Forecast
- 10
- 18
Clear
- 9
- 27
Partly cloudy
- 12
- 19
Partly cloudy
- 11
- 16
Possible shower. Windy
- 10
- 16
Cloudy
- 10
- 17
Cloudy
- 9
- 27
Sunny
Today 11 Dec South West
Clear. Winds southeasterly 15 to 20 km/h.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- Easterly 10 to 15 knots, reaching up to 20 knots in the west.
- Seas
- 1 to 1.5 metres.
- 1st Swell
- Southwesterly 2 metres.
- Weather
- Clear.
- Weather Situation
- A ridge of high pressure over Tasmania will clear into the Tasman Sea on Friday with a trough lingering just across the NSW border along the east coast. A separate trough will then sweep across the state on Saturday, entering from the west in the early morning and clearing in the east by the evening. On Sunday a cold front will skim across the south with a new high pressure ridge developing in its wake on Monday.
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