Semaphore Weather Forecast

    • 21
    • 27

    Mostly sunny

    • 15
    • 26

    Rain. Possible storm

    • 13
    • 17

    Showers

    • 10
    • 18

    Shower or two

    • 10
    • 19

    Possible shower

    • 11
    • 20

    Mostly sunny

    • 13
    • 23

    Partly cloudy

Today 23 Oct Adelaide

Mostly sunny. Slight chance of a shower, most likely later tonight. The chance of a thunderstorm about the northern suburbs in the late morning and afternoon. Light winds becoming northwest to southwesterly 15 to 20 km/h in the morning then tending south to southeasterly 15 to 25 km/h in the late afternoon.

Adelaide Metropolitan Waters

Wind
Variable below 10 knots becoming southwesterly 10 to 15 knots in the middle of the day then turning south to southeasterly in the late afternoon. Winds reaching up to 20 knots north of Grange in the evening.
Seas
Around 1 metre.
1st Swell
West to southwesterly below 1 metre.
Weather
Mostly sunny.
Weather Situation
A slow moving high pressure system in the Tasman Sea maintains a ridge across eastern parts of the state. A trough of low pressure over the far west is forecast to slowly move eastwards on Friday. Another trough and multiple cold fronts move over the state over the weekend. A ridge of high pressure moves into the west on Monday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Semaphore Temperature Statistics View More

October Temperature

Parafield Airport (13 km)

  • Lowest 6 October, 2026

    6.6 °C

  • Average October

    18 °C

  • Highest 18 October, 2026

    31.3 °C

Climate (2021–2026)

Parafield Airport (13 km)

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  • Average Low 2021–2026

    11.3 °C

  • Average 2021–2026

    17.2 °C

  • Average High 2021–2026

    23.7 °C
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