Tumby Bay Weather Forecast

    • 12
    • 20

    Shower

    • 12
    • 27

    Storm

    • 11
    • 18

    Shower

    • 8
    • 19

    Cloudy

    • 8
    • 20

    Shower

    • 12
    • 24

    Shower

    • 11
    • 21

    Shower

Today 20 Oct Lower Eyre Peninsula

Cloudy. High chance of showers, most likely in the late morning and afternoon. The chance of a thunderstorm in the morning and early afternoon. Winds southeasterly 15 to 25 km/h turning easterly 15 to 20 km/h in the evening. Daytime maximum temperatures between 19 and 24.

Spencer Gulf Coastal Waters

Wind
Southerly 10 to 15 knots increasing to 20 knots before turning southeasterly 10 to 15 knots in the late morning and afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres north of Cowell to Wallaroo around midday.
1st Swell
South to southwesterly below 1 metre, increasing to around 1 metre south of Cowell to Wallaroo.
Weather
Cloudy. 70% chance of showers. The chance of a thunderstorm.
Weather Situation
A weak ridge extends through the coastal waters today. Tomorrow a low pressure system will move into the Bight bring a strong cold front with its passing. As the low moves off the Lower South East Coast Wednesday morning, the associated front will exit eastern waters and continue through Bass Strait. In the wake of this front a high pressure system will move into the Bight, passing over central coasts late Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Tumby Bay Temperature Statistics View More

October Temperature

Port Lincoln Airport (32km)

  • Lowest 15 October, 2025

    4.8 °C

  • Average October

    15.6 °C

  • Highest 4 October, 2025

    34 °C

Climate (2020–Present)

Port Lincoln Airport (32km)

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  • Average Low 2020–2025

    11.4 °C

  • Average 2020–2025

    15.8 °C

  • Average High 2020–2025

    21.3 °C
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