Semaphore Weather Forecast

    • 9
    • 20

    Mostly clear

    • 11
    • 20

    Becoming cloudy

    • 13
    • 21

    Partly cloudy

    • 12
    • 17

    Showers

    • 11
    • 17

    Shower or two

    • 9
    • 18

    Shower or two

    • 11
    • 19

    Shower or two

Today 21 May Adelaide

Mostly clear. Light winds.

Adelaide Metropolitan Waters

Wind
Variable below 10 knots.
Seas
Below 0.5 metres.
1st Swell
West to southwesterly below 0.5 metres.
Weather
Mostly clear.
Weather Situation
A high pressure system over southeastern SA will remain dominant as it slowly moves east and into the Tasman Sea on Friday. A cold front move across across South Australia over the weekend. A low pressure system develops and lingers near the southeast early next week whilst a ridge high pressure builds over the west.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Semaphore Temperature Statistics View More

May Temperature

Parafield Airport (13km)

  • Lowest 10 May, 2026

    6.2 °C

  • Average May

    16 °C

  • Highest 1 May, 2026

    31 °C

Climate (2021–Present)

Parafield Airport (13km)

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  • Average Low 2021–2026

    11.2 °C

  • Average 2021–2026

    17.1 °C

  • Average High 2021–2026

    23.6 °C
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