Semaphore Weather Forecast

    • 9
    • 24

    Clear

    • 10
    • 19

    Showers increasing

    • 9
    • 16

    Showers

    • 11
    • 18

    Showers

    • 10
    • 17

    Cloudy

    • 7
    • 17

    Partly cloudy

    • 8
    • 18

    Partly cloudy

Today 18 Sep Adelaide

Clear. Winds north to northwesterly 15 to 20 km/h becoming light in the late evening.

Adelaide Metropolitan Waters

Wind
Northerly 10 to 15 knots turning west to northwesterly below 10 knots in the evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly below 1 metre.
Weather
Clear.
Weather Situation
A high pressure system lies over the Tasman Sea with a ridge extending into the east of the state. A weak trough over South Australian waters will continue moving through eastern waters tonight. 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 Temperature Statistics View More

September Temperature

Adelaide Airport (13km)

  • Lowest 13 September, 2025

    5.4 °C

  • Average September

    14 °C

  • Highest 6 September, 2025

    26.8 °C

Climate (2020–Present)

Adelaide Airport (13km)

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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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