Port Arthur Weather Forecast
- 15
- 21
Shower or two. Windy
- 10
- 19
Morning shower or two
- 11
- 22
Mostly sunny
- 13
- 21
Partly cloudy
- 13
- 19
Shower or two
- 12
- 19
Shower or two
- 12
- 19
Possible shower
Today 10 Jan South East
Partly cloudy. High chance of showers, with possible small hail in the far south this evening. The chance of a thunderstorm this morning. Damaging winds possible. Winds northwesterly 35 to 50 km/h turning southwesterly in the early afternoon then tending west to southwesterly 25 to 40 km/h in the evening. Daytime maximum temperatures between 14 and 21.
South East Coastal Waters
Tasman Island to South East Cape- Wind
- Northwest to southwesterly 15 to 20 knots increasing to 20 to 30 knots in the morning then becoming southwesterly 25 to 30 knots in the late afternoon. Winds reaching up to 35 knots offshore in the early afternoon.
- Seas
- 1 to 2 metres, increasing to 2 to 3 metres during the morning.
- 1st Swell
- West to southwesterly 1 to 1.5 metres inshore, increasing to 1 to 2 metres offshore.
- Weather
- Partly cloudy. 80% chance of showers, with possible small hail this evening. The chance of a thunderstorm in the early afternoon.
- Weather Situation
- A strong cold front will cross over Tasmania early Saturday, followed by a post frontal trough in the afternoon. A ridge of high pressure will begin to develop from the west on Sunday, with multiple small high pressure centres crossing over the state in the following days. This broad ridge will persist over Tasmania into Tuesday.
Port Arthur Temperature Statistics View More
January Temperature
Tasman Island (16km)
Lowest 1 January, 2026
9.9 °CAverage January
14.1 °CHighest 6 January, 2026
20.3 °C
Climate (2021–Present)
Tasman Island (16km)
Average Low 2021–2026
9.3 °CAverage 2021–2026
11.5 °CAverage High 2021–2026
14.5 °C