Gunnamatta Beach Weather Forecast
- 14
- 21
Shower
- 10
- 15
Rain
- 8
- 16
Partly cloudy
- 7
- 18
Partly cloudy
- 8
- 22
Partly cloudy
- 14
- 22
Shower
- 12
- 22
Shower
Today 25 Sep Mornington Peninsula
Cloudy. High chance of showers, most likely late this afternoon and evening. The chance of a thunderstorm during this afternoon and evening. Winds north to northwesterly 15 to 25 km/h becoming light in the early morning then becoming southerly 15 to 20 km/h in the early afternoon.
Central Victoria Coastal Waters
Cape Otway to Wilsons Promontory- Wind
- West to northwesterly 10 to 15 knots turning southwesterly in the early afternoon.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly around 1 metre, increasing to 1 to 1.5 metres in the west.
- Weather
- Cloudy. 80% chance of showers. The chance of a thunderstorm inshore during this afternoon and evening.
- Weather Situation
- A high pressure system over the Tasman Sea is directing a warm northerly airstream over Victoria as a low pressure trough approaches from the west. The trough is forecast to cross Victoria during today as a band of mid-level cloud crosses the Bight. The cloud band is expected to cross Bass Strait on Saturday as a strong high pressure system crosses the Southern Ocean. During Sunday the high is forecast to approach Tasmania with a ridge extending across Bass Strait. The high is then expected to move over the Tasman Sea on Monday with airflow tending east to northeasterly over coastal waters.
Gunnamatta Beach Temperature Statistics View More
September Temperature
Cerberus (28km)
Lowest 23 September, 2026
1.8 °CAverage September
12.9 °CHighest 20 September, 2026
26.2 °C
Climate (2021–2026)
Cerberus (28km)
Average Low 2021–2026
10.2 °CAverage 2021–2026
14.6 °CAverage High 2021–2026
19.7 °C