Seal Island Weather Forecast

    • 9
    • 18

    Shower or two. Becoming windy

    • 7
    • 16

    Possible shower

    • 9
    • 18

    Shower or two

    • 9
    • 16

    Possible shower

    • 8
    • 17

    Cloudy

    • 8
    • 18

    Cloudy

    • 7
    • 20

    Partly cloudy

Today 19 Sep Mount Lofty Ranges

Partly cloudy. High chance of showers, most likely in the afternoon and evening. Winds west to northwesterly 25 to 40 km/h increasing to 45 km/h before tending west to southwesterly 25 to 30 km/h during the afternoon and evening. Overnight temperatures falling to between 7 and 10 with daytime temperatures reaching between 15 and 19.

South Central Coastal Waters

Wind
Westerly 15 to 20 knots increasing to 20 to 30 knots in the morning then turning southwesterly in the late afternoon. Winds reaching up to 35 knots in the early afternoon.
Seas
1 to 1.5 metres, increasing to 2 to 3 metres during the morning.
1st Swell
Westerly 2.5 to 4 metres, tending southwesterly 4 to 5 metres by early evening.
Weather
Partly cloudy. 90% chance of showers.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Seal Island Temperature Statistics View More

September Temperature

Encounter Bay (4km)

  • Lowest 18 September, 2025

    2.2 °C

  • Average September

    14.4 °C

  • Highest 6 September, 2025

    27.4 °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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