Port Arthur Weather Forecast
- 16
- 26
Partly cloudy
- 12
- 26
Partly cloudy
- 12
- 23
Cloudy
- 11
- 29
Sunny
- 16
- 37
Sunny
- 18
- 40
Partly cloudy
- 20
- 36
Partly cloudy
Today 13 Dec Yorke Peninsula
The chance of a thunderstorm in the morning. Sunny afternoon. Winds southerly 25 to 40 km/h. Overnight temperatures falling to between 13 and 16 with daytime temperatures reaching 25 to 30.
Gulf St Vincent Coastal Waters
- Wind
- Southerly 15 to 25 knots, reaching up to 30 knots south of Port Vincent to Brighton early in the morning.
- Seas
- 1 to 2 metres.
- 1st Swell
- West to southwesterly below 0.5 metres.
- Weather
- The chance of a thunderstorm in the morning. Mostly sunny afternoon.
- Weather Situation
- A trough will move eastwards to clear South East coastal waters during Friday evening. A slow moving broad high pressure system in the Indian Ocean will then build a ridge across coastal waters on Saturday and establish itself south of the Bight on Sunday and Monday. The high is forecast to move east into the Tasman Sea on Tuesday while maintaining a ridge over coastal waters.
Port Arthur Temperature Statistics View More
December Temperature
Kadina Airport (41km)
Lowest 8 December, 2025
7 °CAverage December
20.4 °CHighest 4 December, 2025
37.5 °C
Climate (2020–Present)
Kadina Airport (41km)
Average Low 2020–2025
10.1 °CAverage 2020–2025
16.3 °CAverage High 2020–2025
23.3 °C