Semaphore South Weather Forecast

    • 9
    • 24

    Sunny

    • 11
    • 19

    Showers increasing

    • 10
    • 15

    Showers

    • 11
    • 17

    Showers

    • 11
    • 17

    Possible morning shower

    • 8
    • 17

    Cloudy

    • 9
    • 19

    Partly cloudy

Today 18 Sep Adelaide

Sunny. Winds north to northwesterly 20 to 30 km/h becoming light in the late evening.

Adelaide Metropolitan Waters

Wind
Northerly 10 to 15 knots, reaching up to 20 knots south of Port Noarlunga in the early afternoon. Winds turning west to northwesterly below 10 knots in the evening.
Seas
Around 1 metre.
1st Swell
West to southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A high pressure system lies over NSW with a ridge extending into the east of the state. A weak trough will move over South Australian waters later today, settling over the far northeast tonight before clearing on Friday. A cold front will pass over the south during Friday afternoon with a southwesterly flow persisting through the weekend as a ridge of high pressure extends over northern parts of the state.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Semaphore South Temperature Statistics View More

September Temperature

Adelaide Airport (12km)

  • Lowest 13 September, 2025

    5.4 °C

  • Average September

    14 °C

  • Highest 6 September, 2025

    26.8 °C

Climate (2020–Present)

Adelaide Airport (12km)

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  • Average Low 2020–2025

    12.2 °C

  • Average 2020–2025

    16.8 °C

  • Average High 2020–2025

    21.9 °C
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