Grants Lagoon Entrance Weather Forecast

    • 12
    • 20

    Partly cloudy

    • 13
    • 23

    Sunny

    • 10
    • 20

    Mostly sunny

    • 10
    • 18

    Sunny

    • 9
    • 21

    Partly cloudy

    • 14
    • 25

    Shower or two

    • 12
    • 20

    Shower or two

Today 8 Dec St Helens

Partly cloudy. Slight chance of a shower, most likely in the late afternoon and evening. Winds northwesterly 25 to 40 km/h.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
Northwesterly 15 to 25 knots, reaching up to 30 knots in the late morning and afternoon.
Seas
1.5 to 2.5 metres.
1st Swell
Southeast to southwesterly around 1 metre offshore.
Weather
Partly cloudy.
Weather Situation
A northwesterly flow over Tasmania ahead of a cold front crossing the state during the day. Westerly flow behind the cold front then persists on Tuesday, with a trough of low pressure embedded in the westerly flow moving over the state. A high pressure system south of the Bight then extends a ridge over Bass Strait, with another cold front clipping the south later Wednesday. The high moves eastwards to be centred east of Tasmania later Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grants Lagoon Entrance Temperature Statistics View More

December Temperature

St Helens Aerodrome (9km)

  • Lowest 2 December, 2025

    6.6 °C

  • Average December

    15.1 °C

  • Highest 4 December, 2025

    27.3 °C

Climate (2020–Present)

St Helens Aerodrome (9km)

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  • Average Low 2020–2025

    9.3 °C

  • Average 2020–2025

    13.3 °C

  • Average High 2020–2025

    18.2 °C
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