Saint Mary Bay Weather Forecast

    • 13
    • 22

    Clear

    • 15
    • 30

    Partly cloudy

    • 15
    • 24

    Partly cloudy

    • 13
    • 29

    Sunny

    • 17
    • 28

    Partly cloudy

    • 19
    • 27

    Partly cloudy

    • 15
    • 22

    Partly cloudy

Today 20 Apr West Coast

Clear. Winds northeast to southeasterly 15 to 20 km/h.

Upper West Coastal Waters

Fowlers Bay to Elliston
Wind
East to southeasterly 10 to 15 knots decreasing to about 10 knots in the evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Clear.
Weather Situation
A strong high pressure system east of Tasmania will maintain a ridge over SA this week. A cold front is expected to weaken and slide across western and southern coasts during Tuesday and Wednesday. A second cold front may pass over the south again on Saturday with a high pressure system to follow over waters south of the Bight on Sunday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Saint Mary Bay Temperature Statistics View More

April Temperature

Streaky Bay (45km)

  • Lowest 14 April, 2026

    5.3 °C

  • Average April

    16.9 °C

  • Highest 18 April, 2026

    30.7 °C

Climate (2021–Present)

Streaky Bay (45km)

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  • Average Low 2021–2026

    11.9 °C

  • Average 2021–2026

    16.5 °C

  • Average High 2021–2026

    23.6 °C
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