Grants Lagoon Entrance Weather Forecast

    • 10
    • 17

    Mostly sunny

    • 8
    • 15

    Partly cloudy

    • 4
    • 19

    Sunny

    • 5
    • 16

    Partly cloudy

    • 5
    • 21

    Sunny

    • 5
    • 20

    Sunny

    • 6
    • 20

    Partly cloudy

Today 6 Sep St Helens

Slight chance of a shower in the early morning. Mostly sunny day. Winds southeast to southwesterly 20 to 30 km/h tending east to northeasterly 15 to 20 km/h in the middle of the day then turning north to northwesterly in the late afternoon.

East of Flinders Island Coastal Waters

North Flinders Island to St Helens Point
Wind
West to southwesterly 20 to 25 knots, reaching up to 30 knots during the morning. Winds tending south to southwesterly 15 to 25 knots before dawn then turning west to northwesterly 15 to 20 knots in the early afternoon.
Seas
2 to 3 metres, decreasing below 1 metre during the afternoon, then increasing to 1 to 1.5 metres later in the evening.
1st Swell
South to southeasterly around 1 metre inshore, increasing to 1.5 to 2.5 metres offshore.
Weather
Mostly sunny. 50% chance of showers.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Grants Lagoon Entrance Temperature Statistics View More

September Temperature

St Helens Aerodrome (9km)

  • Lowest 4 September, 2026

    6.1 °C

  • Average September

    12.5 °C

  • Highest 1 September, 2026

    17.3 °C

Climate (2021–2026)

St Helens Aerodrome (9km)

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  • Average Low 2021–2026

    9.4 °C

  • Average 2021–2026

    13.4 °C

  • Average High 2021–2026

    18.3 °C
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