Portland Harbour Weather Forecast
- 15
- 28
Partly cloudy
- 14
- 19
Shower or two. Very windy
- 12
- 17
Cloudy
- 11
- 19
Partly cloudy
- 12
- 20
Partly cloudy
- 13
- 18
Shower or two
- 13
- 17
Possible shower
Today 9 Jan South West
Partly cloudy. Slight chance of a shower in the southeast, most likely in the early morning. Near zero chance of rain elsewhere. The chance of a thunderstorm with little or no rainfall in the afternoon and evening. Damaging winds possible. Winds east to southeasterly 15 to 25 km/h shifting west to northwesterly 40 to 60 km/h in the late morning then becoming westerly 25 to 35 km/h in the evening. Overnight temperatures falling to between 14 and 18 with daytime temperatures reaching 32 to 41.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- East to southeasterly 15 to 20 knots shifting west to northwesterly 15 to 25 knots in the late morning and early afternoon.
- Seas
- 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1.5 metres by early evening.
- 1st Swell
- Southwesterly 1.5 to 2.5 metres.
- Weather
- Partly cloudy. The chance of a thunderstorm in the morning and afternoon.
- Weather Situation
- A trough lingers over Victoria, forecast to remain relatively stationary over the state until a cold front enters from the west late Friday. This front will move across Victoria on Saturday then a ridge of high pressure will follow in its wake, persisting throughout the weekend into Monday.
Portland Harbour Temperature Statistics View More
January Temperature
Cape Nelson Lighthouse (11km)
Lowest 6 January, 2026
11.4 °CAverage January
17.1 °CHighest 7 January, 2026
32.6 °C
Climate (2021–Present)
Cape Nelson Lighthouse (11km)
Average Low 2021–2026
11.8 °CAverage 2021–2026
14.3 °CAverage High 2021–2026
17.6 °C