Seal Island Weather Forecast

    • 13
    • 21

    Clear

    • 14
    • 25

    Sunny

    • 14
    • 33

    Mostly sunny

    • 14
    • 21

    Partly cloudy

    • 11
    • 22

    Cloudy

    • 12
    • 19

    Cloudy

    • 12
    • 21

    Sunny

Today 10 Dec Mount Lofty Ranges

Clear. Winds southeasterly 20 to 30 km/h.

South Central Coastal Waters

Wind
Southeasterly 20 to 25 knots.
Seas
1.5 metres, increasing to 1.5 to 2 metres west of Kangaroo Island.
1st Swell
Southwesterly 2.5 metres.
Weather
Mostly clear.
Weather Situation
A ridge of high pressure persists over southern SA, continuing into Thursday before the high centre moves eastwards over the Tasman Sea late Thursday. A trough of low pressure is expected to move eastwards across the SA waters on Friday. Another ridge of high pressure will move over the south during the weekend.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Seal Island Temperature Statistics View More

December Temperature

Encounter Bay (4km)

  • Lowest 3 December, 2025

    6.9 °C

  • Average December

    18.5 °C

  • Highest 4 December, 2025

    33.4 °C

Climate (2020–Present)

Encounter Bay (4km)

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  • Average Low 2020–2025

    10.4 °C

  • Average 2020–2025

    15.1 °C

  • Average High 2020–2025

    20.6 °C
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