Boston Weather Forecast

    • 13
    • 23

    Possible shower developing

    • 14
    • 24

    Showers easing

    • 12
    • 24

    Cloudy

    • 13
    • 23

    Cloudy

    • 12
    • 24

    Cloudy

    • 13
    • 24

    Partly cloudy

    • 14
    • 26

    Mostly sunny

Today 20 Dec Port Lincoln

Partly cloudy. Medium chance of showers in the late afternoon and evening. Winds southerly 15 to 20 km/h tending southeasterly 15 to 25 km/h in the morning then becoming light in the late evening.

Spencer Gulf Coastal Waters

Wind
Southerly 15 to 20 knots, reaching up to 25 knots north of Cowell to Wallaroo in the late afternoon. Winds turning east to southeasterly 10 to 15 knots in the late evening.
Seas
1 to 1.5 metres, decreasing to 1 metre during the morning, increasing to 1 to 1.5 metres north of Cowell to Wallaroo around midday.
1st Swell
South to southwesterly 1 to 1.5 metres, decreasing to around 1 metre around midday.
Weather
Partly cloudy.
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  • Temperature Forecast Bureau of Meteorology

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Boston Temperature Statistics View More

December Temperature

Port Lincoln Airport (6km)

  • Lowest 7 December, 2025

    8.1 °C

  • Average December

    18.9 °C

  • Highest 18 December, 2025

    42.7 °C

Climate (2020–Present)

Port Lincoln Airport (6km)

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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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