Boston Weather Forecast

    • 14
    • 24

    Mostly clear

    • 14
    • 25

    Possible morning shower

    • 14
    • 26

    Sunny

    • 15
    • 30

    Mostly sunny

    • 14
    • 24

    Mostly sunny

    • 12
    • 24

    Cloudy

    • 12
    • 21

    Cloudy

Today 9 Dec Port Lincoln

Mostly clear. Winds southeasterly 20 to 30 km/h.

Spencer Gulf Coastal Waters

Wind
South to southeasterly 15 to 20 knots, reaching up to 25 knots north of Cowell to Wallaroo in the evening.
Seas
1 to 1.5 metres.
1st Swell
South to southwesterly below 1 metre, increasing to 1 to 1.5 metres south of Cowell to Wallaroo.
Weather
Clear.
Weather Situation
A high pressure system over the Bight extends a ridge of high pressure over most of the state and will persist over southern SA during Wednesday and Thursday. Meanwhile, a trough of low pressure over the far northwest is expected to move along the northern border on Wednesday. The trough will extend further south on Thursday then move eastwards across the west and south of SA on Friday. Another ridge of high pressure will move over the south over the weekend and the trough will move slowly northeastwards.
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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

    17.6 °C
  • Highest 3 December, 2025

    35.3 °C

Climate (2020–Present)

Port Lincoln Airport (6km)

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  • Average Low 2020–2025

    11.4 °C
  • Average 2020–2025

    15.7 °C
  • Average High 2020–2025

    21.3 °C
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