Seal Island Weather Forecast

    • 13
    • 22

    Cloud clearing

    • 14
    • 24

    Sunny

    • 16
    • 29

    Sunny

    • 18
    • 31

    Sunny

    • 18
    • 26

    Partly cloudy

    • 15
    • 24

    Mostly sunny

    • 16
    • 25

    Possible shower

Today 15 Dec Yorke Peninsula

Cloud clearing. Winds southeasterly 25 to 40 km/h. Daytime maximum temperatures in the low to mid 20s.

Investigator Strait Coastal Waters

Wind
Southerly 10 to 15 knots turning southeasterly 15 to 20 knots in the late morning.
Seas
Around 1 metre, increasing to 1 to 1.5 metres by early evening.
1st Swell
West to southwesterly around 1 metre, increasing to 1 to 2 metres through the Backstairs Passage.
Weather
Partly cloudy.
Weather Situation
A high pressure system in the Bight, maintains a ridge over SA as it slowly moves eastwards and out to the Tasman Sea by Wednesday. A trough of low pressure forecast to drift into the far northeast of SA late Wednesday, slowing moving south during Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Seal Island Temperature Statistics View More

December Temperature

Stenhouse Bay (6km)

  • Lowest 3 December, 2025

    9.1 °C

  • Average December

    17.9 °C

  • Highest 3 December, 2025

    33.4 °C

Climate (2020–Present)

Stenhouse Bay (6km)

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  • Average Low 2020–2025

    13.1 °C

  • Average 2020–2025

    16 °C

  • Average High 2020–2025

    20.4 °C
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