Haystack Island Weather Forecast

    • 15
    • 21

    Becoming windy. Partly cloudy

    • 10
    • 15

    Cloudy

    • 10
    • 17

    Sunny

    • 11
    • 21

    Sunny

    • 14
    • 23

    Partly cloudy

    • 14
    • 21

    Possible shower

    • 13
    • 19

    Partly cloudy

Today 20 Sep Yorke Peninsula

Mostly sunny day. Slight chance of a shower in the evening. Winds west to northwesterly 25 to 35 km/h increasing to 40 km/h before turning southwesterly 25 to 35 km/h in the early afternoon. Daytime maximum temperatures in the low to mid 20s.

Investigator Strait Coastal Waters

Wind
West to northwesterly 15 to 20 knots increasing to 25 knots before turning southwesterly 15 to 20 knots in the evening.
Seas
1 to 2 metres.
1st Swell
West to southwesterly around 1 metre.
Weather
Becoming cloudy.
Weather Situation
A cold front will cross the west of the state this morning and will track across the east of the state during the day. Another high pressure system will move eastwards across waters to the south during Monday then over Victoria and the Tasman Sea on Tuesday. This high will extend a ridge westwards over SA ahead of a low pressure trough that is expected to move over the far west of SA during Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Haystack Island Temperature Statistics View More

September Temperature

Stenhouse Bay (5km)

  • Lowest 17 September, 2026

    6.7 °C

  • Average September

    14.1 °C

  • Highest 12 September, 2026

    25.2 °C

Climate (2021–2026)

Stenhouse Bay (5km)

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  • Average Low 2021–2026

    13.2 °C

  • Average 2021–2026

    16.1 °C

  • Average High 2021–2026

    20.5 °C
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