Grants Lagoon Entrance Weather Forecast

    • 13
    • 24

    Showers increasing

    • 11
    • 20

    Partly cloudy

    • 11
    • 19

    Cloudy

    • 12
    • 23

    Partly cloudy

    • 16
    • 25

    Partly cloudy

    • 13
    • 23

    Cloud clearing

    • 14
    • 24

    Partly cloudy

Today 21 Jan St Helens

Becoming cloudy. Very high chance of showers, most likely during this afternoon and evening. Winds westerly 15 to 20 km/h tending northwesterly in the late afternoon then shifting south to southwesterly 20 to 30 km/h in the evening.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
Variable about 10 knots becoming north to northwesterly 15 to 20 knots in the middle of the day then tending west to northwesterly 15 to 25 knots in the late afternoon. Winds reaching up to 30 knots in the late evening.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Easterly 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Mostly sunny. 60% chance of showers.
Weather Situation
A cold front will move across the state from the west today. A high pressure system moves into waters south of the Bight and extends a ridge over Tasmania on Thursday. That high then moves into the Tasman Sea on Friday, directing a northerly stream over the state ahead of a cold front expected over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grants Lagoon Entrance Temperature Statistics View More

January Temperature

St Helens Aerodrome (9km)

  • Lowest 12 January, 2026

    9.4 °C

  • Average January

    17.3 °C

  • Highest 7 January, 2026

    33.6 °C

Climate (2021–Present)

St Helens Aerodrome (9km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    13.3 °C

  • Average High 2021–2026

    18.2 °C
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