Port Arthur Weather Forecast

    • 4
    • 19

    Shower

    • 9
    • 18

    Shower

    • 9
    • 16

    Rain

    • 7
    • 16

    Shower

    • 8
    • 16

    Shower

    • 6
    • 17

    Shower

    • 7
    • 17

    Partly cloudy

Today 7 Aug Yorke Peninsula

Becoming cloudy. Very high chance of rain, most likely in the evening. Winds northerly 20 to 30 km/h. Daytime maximum temperatures around 17.

Gulf St Vincent Coastal Waters

Wind
Northerly 10 to 15 knots, reaching up to 20 knots south of Port Vincent to Brighton in the late evening.
Seas
Below 1 metre.
1st Swell
South to southwesterly below 1 metre.
Weather
Becoming cloudy. 80% chance of showers.
Weather Situation
A weak high pressure system centred over NSW will slowly move east while maintaining a ridge over SA until Saturday. A strong cold front will then begin to move into the Bight and move east over the state from late Saturday and throughout Sunday. Another cold front is then forecast to move into the Bight from late Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Port Arthur Temperature Statistics View More

August Temperature

Kadina Airport (41km)

  • Lowest 1 August, 2026

    -0.8 °C

  • Average August

    9.3 °C

  • Highest 2 August, 2026

    17.5 °C

Climate (2021–2026)

Kadina Airport (41km)

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  • Average Low 2021–2026

    10.2 °C

  • Average 2021–2026

    16.4 °C

  • Average High 2021–2026

    23.5 °C
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