River Tamar - Johnstons Flats Weather Forecast

    • 10
    • 19

    Showers increasing

    • 11
    • 17

    Showers

    • 8
    • 17

    Possible shower

    • 7
    • 16

    Shower or two

    • 7
    • 18

    Possible shower

    • 7
    • 17

    Possible shower

    • 8
    • 17

    Shower or two

Today 30 Sep Central North

Cloudy. Very high chance of showers. Winds north to northwesterly 25 to 35 km/h. Daytime maximum temperatures between 17 and 20.

Central North Coastal Waters

Stanley to Flinders Island
Wind
Northwesterly 10 to 15 knots, reaching up to 20 knots offshore during the morning and early afternoon. Winds decreasing to about 10 knots in the late evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres offshore.
1st Swell
Northeasterly below 1 metre.
Weather
Cloudy. 80% chance of showers.
Weather Situation
Northerly flow builds over Tasmania today ahead of an approaching trough, forecast to cross Wednesday morning. A broad trough is forecast to cross the state during the day Thursday and then a cold front in the evening. A ridge of high pressure is then expected to approach Tasmania from the west during Friday, concurrently with a trough deepening over Victoria. The trough is forecast to move to the east of Tasmania on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

River Tamar - Johnstons Flats Temperature Statistics View More

September Temperature

Low Head (24km)

  • Lowest 11 September, 2026

    4.2 °C

  • Average September

    12 °C

  • Highest 20 September, 2026

    19.4 °C

Climate (2021–2026)

Low Head (24km)

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  • Average Low 2021–2026

    10.9 °C

  • Average 2021–2026

    14 °C

  • Average High 2021–2026

    17.2 °C
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