Chinaman Island Weather Forecast
- 9
- 20
Rain. Possible storm
- 11
- 20
Possible shower
- 11
- 19
Shower or two
- 11
- 20
Shower or two
- 11
- 17
Cloudy
- 10
- 18
Cloudy
- 9
- 26
Sunny
Today 21 Dec Melbourne
Cloudy. Very high chance of rain, becoming less likely at night. A thunderstorm likely in the afternoon and early evening, possibly severe with damaging winds, large hail and heavy rain which may lead to flash flooding. Winds south to southeasterly 15 to 20 km/h turning southwesterly 15 to 25 km/h in the early afternoon.
Western Port Local Waters
- Wind
- South to southeasterly 15 to 20 knots turning west to southwesterly in the evening. Winds reaching up to 30 knots west of Sandy Point in the evening.
- Seas
- Below 1 metre, increasing to 1.5 metres west of Sandy Point by early evening.
- Weather
- Cloudy. 90% chance of rain. The chance of a thunderstorm in the afternoon and early evening with possible squalls above 40 knots.
- Weather Situation
- A low pressure system south of the Bight will move east and combine with a broad trough over western Victoria early Sunday. The low pressure system will then deepen and slowly move southeast across the State during Sunday to clear into eastern Bass Strait late Sunday. A high pressure ridge then builds across Victoria and Bass Strait during Monday. A weak cold front crosses Bass Strait during late Monday and early Tuesday with the ridge re-establishing itself from Tuesday to Thursday.
Chinaman Island Temperature Statistics View More
December Temperature
Cerberus (17km)
Lowest 3 December, 2025
6 °CAverage December
16.5 °CHighest 18 December, 2025
35.8 °C
Climate (2020–Present)
Cerberus (17km)
Average Low 2020–2025
10.1 °CAverage 2020–2025
14.5 °CAverage High 2020–2025
19.5 °C