Williamstown Weather Forecast
- 11
- 18
Cloudy
- 12
- 21
Partly cloudy
- 12
- 33
Sunny
- 18
- 36
Sunny
- 18
- 30
Shower or two
- 20
- 27
Shower or two
- 16
- 23
Showers
Today 15 Dec Melbourne
Cloudy. Slight chance of a shower about the Dandenongs in the early afternoon. Near zero chance of rain elsewhere. Winds southwesterly 25 to 35 km/h turning southerly in the afternoon.
Port Phillip Local Waters
- Wind
- South to southwesterly 15 to 20 knots, reaching up to 30 knots in the south in the late morning and afternoon.
- Seas
- 1 to 1.5 metres.
- Weather
- Cloudy.
- Weather Situation
- A high pressure system well to the west directs a southwesterly flow over Victoria, before a ridge moves in from the west by the late evening. The ridge is expected to persist over the state as the high pressure centre moves through Bass Strait on Tuesday, and out to the Tasman Sea by Wednesday. A trough is then forecast to move over Victoria late Thursday.
Williamstown Temperature Statistics View More
December Temperature
Laverton RAAF Base (12km)
Lowest 7 December, 2025
6.6 °CAverage December
17.2 °CHighest 4 December, 2025
34.9 °C
Climate (2020–Present)
Laverton RAAF Base (12km)
Average Low 2020–2025
10.5 °CAverage 2020–2025
15 °CAverage High 2020–2025
20.4 °C