Eastern Sister Weather Forecast
- 16
- 21
Partly cloudy
- 12
- 18
Shower
- 11
- 16
Windy
- 11
- 18
Cloudy
- 11
- 26
Sunny
- 16
- 28
Sunny
- 15
- 23
Partly cloudy
Today 13 Dec Mornington Peninsula
Partly cloudy. Medium chance of showers, most likely in the evening. The chance of a thunderstorm in the afternoon. Winds west to southwesterly 15 to 20 km/h tending south to southwesterly 20 to 30 km/h in the middle of the day then becoming light in the late evening.
Port Phillip Local Waters
- Wind
- South to southwesterly 15 to 20 knots tending west to southwesterly below 10 knots in the late evening.
- Seas
- Around 1 metre.
- Weather
- Partly cloudy. The chance of a thunderstorm in the afternoon and early evening.
- Weather Situation
- A high pressure system lies over the Tasman Sea and extends a broad ridge over eastern Bass Strait. A low pressure trough extends across the SA border into western Victoria and Bass Strait. The trough is expected to slowly move east over Victoria and Bass Strait during Saturday, entering from the west in the early morning and moving into eastern Coastal waters by the evening. The next cold front will cross Bass Strait during Sunday with a new high pressure ridge developing in its wake on Monday.
Eastern Sister Temperature Statistics View More
December Temperature
Cerberus (36km)
Lowest 3 December, 2025
6 °CAverage December
15.6 °CHighest 4 December, 2025
34 °C
Climate (2020–Present)
Cerberus (36km)
Average Low 2020–2025
10.1 °CAverage 2020–2025
14.5 °CAverage High 2020–2025
19.5 °C