Trefoil Island Weather Forecast

    • 12
    • 14

    Shower

    • 9
    • 12

    Windy

    • 5
    • 12

    Partly cloudy

    • 4
    • 13

    Sunny

    • 9
    • 15

    Shower

    • 12
    • 15

    Shower

    • 11
    • 15

    Shower

Today 25 Sep North West Coast

Cloudy. High chance of showers in the west, medium chance elsewhere. Winds west to northwesterly 15 to 20 km/h turning southwesterly 15 to 25 km/h in the early afternoon. Daytime maximum temperatures between 15 and 20.

Far Northwest Coastal Waters

Sandy Cape to Stanley including King Island
Wind
West to northwesterly 10 to 15 knots turning southwesterly in the late morning and early afternoon.
Seas
Around 1 metre.
1st Swell
Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres around midday, then increasing to 1 to 2 metres during the afternoon.
Weather
Cloudy. 70% chance of rain.
Weather Situation
A weak trough moves over the state today ahead of a cold front which crosses early tomorrow morning. A high pressure system is then forecast to extend a ridge over Tasmania from the southwest during Saturday, before moving across the state on Sunday and Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Trefoil Island Temperature Statistics View More

September Temperature

Marrawah (30km)

  • Lowest 23 September, 2026

    4.5 °C

  • Average September

    11.1 °C

  • Highest 20 September, 2026

    18.8 °C

Climate (2021–2026)

Marrawah (30km)

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  • Average Low 2021–2026

    9.9 °C

  • Average 2021–2026

    12.6 °C

  • Average High 2021–2026

    16.9 °C
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