Cape Portland Weather Forecast

    • 11
    • 27

    Fog

    • 12
    • 21

    Shower

    • 13
    • 20

    Storm

    • 11
    • 21

    Shower

    • 11
    • 21

    Shower

    • 11
    • 19

    Shower

    • 11
    • 19

    Windy

Today 18 Dec North East

Partly cloudy. The chance of fog near the coast early this morning. Slight chance of a light shower during this afternoon and early evening. Winds west to northwesterly 15 to 25 km/h tending west to southwesterly 15 to 20 km/h in the late evening. Daytime maximum temperatures 23 to 29.

Banks Strait and Franklin

Wind
Westerly 10 to 15 knots becoming variable about 10 knots in the early afternoon.
Seas
Below 1 metre.
1st Swell
East to northeasterly below 1 metre.
Weather
Partly cloudy. The chance of morning fog about Banks Strait with reduced visibility.
Weather Situation
A trough approaches from the southwest today and is forecast to cross the state during this afternoon. A weak ridge is then expected to pass to the south on Friday, before a low pressure system moves over the state on Saturday, lingering about the east coast on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cape Portland Temperature Statistics View More

December Temperature

Swan Island (12km)

  • Lowest 2 December, 2025

    8.3 °C

  • Average December

    14.8 °C

  • Highest 13 December, 2025

    24.2 °C

Climate (2020–Present)

Swan Island (12km)

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  • Average Low 2020–2025

    11.9 °C

  • Average 2020–2025

    14.3 °C

  • Average High 2020–2025

    17.5 °C
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