Grant Bay Weather Forecast
- 16
- 25
Partly cloudy
- 12
- 18
Cloudy
- 11
- 17
Showers
- 11
- 18
Shower or two
- 11
- 17
Shower or two
- 12
- 18
Cloudy
- 11
- 17
Cloudy
Today 19 Dec South West
Partly cloudy. Medium chance of showers. The chance of a thunderstorm in the evening. Light winds becoming northwest to northeasterly 15 to 20 km/h in the morning then tending west to southwesterly 20 to 30 km/h in the middle of the day. Overnight temperatures falling to around 17 with daytime temperatures reaching 28 to 36.
West Victoria Coastal Waters
SA-Vic Border to Cape Otway- Wind
- Variable about 10 knots becoming westerly 10 to 15 knots in the early afternoon. Winds reaching up to 20 knots in the west in the evening.
- Seas
- Below 1 metre, decreasing below 0.5 metres during the morning, then increasing to around 1 metre during the afternoon.
- 1st Swell
- Below 0.5 metres, tending southwesterly 1 to 1.5 metres during the morning, then tending south to southwesterly 1.5 to 2.5 metres around midday.
- Weather
- Partly cloudy. The chance of a thunderstorm in the far east in the evening.
Grant Bay Temperature Statistics View More
December Temperature
Cape Nelson Lighthouse (8km)
Lowest 5 December, 2025
9.7 °CAverage December
15.7 °CHighest 17 December, 2025
26 °C
Climate (2020–Present)
Cape Nelson Lighthouse (8km)
Average Low 2020–2025
11.8 °CAverage 2020–2025
14.3 °CAverage High 2020–2025
17.5 °C