Trefoil Island Weather Forecast
- 11
- 14
Shower
- 10
- 13
Shower
- 10
- 13
Windy
- 10
- 13
Shower
- 11
- 14
Shower
- 9
- 13
Shower
- 8
- 13
Shower
Today 20 Aug North West Coast
Cloudy. Slight chance of a shower. Winds west to northwesterly 15 to 20 km/h.
Far Northwest Coastal Waters
Sandy Cape to Stanley including King Island- Wind
- Northwesterly 10 to 15 knots, reaching up to 20 knots offshore.
- Seas
- Around 1 metre, increasing to 1 to 1.5 metres south of King Island.
- 1st Swell
- Westerly 1 to 2 metres, increasing to 2.5 to 3 metres south of King Island.
- Weather
- Partly cloudy.
- Weather Situation
- A series of troughs and fronts embedded in a westerly flow are expected to cross Tasmania over the coming days. A high pressure system to the north of Tasmania brings stable conditions from late Saturday before it moves into the Tasman Sea on Sunday. A cold front then approaches Tasmania from the west on Monday, directing a northwesterly flow over the state.
Trefoil Island Temperature Statistics View More
August Temperature
Smithton Aerodrome (40km)
Lowest 1 August, 2026
1.4 °CAverage August
10.1 °CHighest 10 August, 2026
16 °C
Climate (2021–2026)
Smithton Aerodrome (40km)
Average Low 2021–2026
8 °CAverage 2021–2026
12.6 °CAverage High 2021–2026
17.7 °C