Portland Offshore Weather Forecast
- 11
- 16
Rain
- 8
- 15
Showers increasing
- 8
- 15
Showers increasing
- 9
- 15
Shower or two
- 7
- 16
Cloudy
- 9
- 15
Showers
- 8
- 14
Showers
Today 19 Aug South West
Cloudy. Very high chance of rain, most likely in the morning and afternoon. The chance of a thunderstorm in the morning. Winds north to northeasterly 25 to 35 km/h increasing to 45 km/h before turning northwesterly 25 to 35 km/h in the late morning and early afternoon. Overnight temperatures falling to around 11 with daytime temperatures reaching between 14 and 17.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- Northerly 20 to 25 knots, reaching up to 30 knots offshore during the day. Winds turning northwesterly 15 to 25 knots in the middle of the day.
- Seas
- 1 to 2 metres, increasing to 2 to 3 metres offshore.
- 1st Swell
- Southwesterly 2 metres.
- Weather
- Cloudy. Near 100% chance of rain. The chance of a thunderstorm during the morning and afternoon.
- Weather Situation
- A large high pressure system over the Tasman Sea is responsible for northerly winds across Victoria. A weak front will move across the state later today. A ridge of high pressure will become established over the north with further weak features passing to the south in a broad westerly flow. A high pressure system is expected to be centred over the state on the weekend.
Portland Offshore Temperature Statistics View More
August Temperature
Cape Nelson Lighthouse (9km)
Lowest 1 August, 2026
5.6 °CAverage August
11.6 °CHighest 2 August, 2026
15.7 °C
Climate (2021–2026)
Cape Nelson Lighthouse (9km)
Average Low 2021–2026
11.9 °CAverage 2021–2026
14.4 °CAverage High 2021–2026
17.6 °C