Portland Bay Weather Forecast
- 8
- 15
Showers
- 5
- 13
Showers
- 5
- 13
Showers easing
- 6
- 14
Possible shower
- 3
- 15
Partly cloudy
- 5
- 17
Mostly sunny
- 8
- 17
Cloudy
Today 15 Aug South West
Cloudy. Very high chance of showers, most likely during the morning and afternoon. Snow falling above 900 metres. Possible small hail late this afternoon and evening. Damaging winds possible near the Otways. Winds north to northwesterly 25 to 35 km/h turning westerly in the middle of the day then tending west to northwesterly 15 to 25 km/h in the late afternoon. Daytime maximum temperatures between 11 and 14.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- North to northwesterly 25 to 30 knots turning westerly 20 to 30 knots during the morning. Winds reaching up to 35 knots in the east in the early afternoon.
- Seas
- 2 to 3 metres.
- 1st Swell
- Westerly 2 to 3 metres, increasing to 3 to 4 metres by early evening.
- Weather
- Cloudy. 95% chance of showers, with possible small hail during this afternoon and evening.
- Weather Situation
- A high pressure system over the Tasman Sea extends a ridge north of Victoria, with northerly flow strengthening ahead of a cold front which will cross the State during the day today. A subsequent trough on Saturday morning will see a cold air mass extend over the State. On Sunday a low pressure system is forecast to develop near Bass Strait and this will extend another cold front over Victoria before moving over the Tasman Sea on Monday.
Portland Bay Temperature Statistics View More
August Temperature
Portland Airport (25km)
Lowest 3 August, 2025
2.1 °CAverage August
10 °CHighest 11 August, 2025
18.4 °C
Climate (2020–Present)
Portland Airport (25km)
Average Low 2020–2025
9.7 °CAverage 2020–2025
13.5 °CAverage High 2020–2025
18.1 °C