Dianas Basin Weather Forecast

    • 11
    • 23

    Mostly clear

    • 15
    • 24

    Partly cloudy

    • 15
    • 20

    Cloudy

    • 14
    • 23

    Partly cloudy

    • 14
    • 25

    Possible shower

    • 16
    • 22

    Showers

    • 10
    • 19

    Mostly sunny

Today 27 Jan St Helens

Mostly clear. Winds northerly 20 to 30 km/h tending northwesterly 15 to 20 km/h in the late evening.

Upper East Coastal Waters

St Helens Point to Wineglass Bay
Wind
Northerly 20 to 30 knots.
Seas
1.5 to 2.5 metres.
1st Swell
Southeasterly 1 to 1.5 metres.
Weather
Mostly clear.
Weather Situation
A high pressure system positioned over the Tasman Sea is bringing a northerly flow over Tasmania, ahead of a trough and cold front expected to cross the state this evening. On Wednesday a high pressure system south of the Bight will extend a ridge over Tasmania, with the high centre to cross the state on Thursday and linger over the Tasman Sea into Friday. A trough is expected to approach Tasmania from the west during Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dianas Basin Temperature Statistics View More

January Temperature

St Helens Aerodrome (5km)

  • Lowest 12 January, 2026

    9.4 °C

  • Average January

    16.9 °C

  • Highest 7 January, 2026

    33.6 °C

Climate (2021–Present)

St Helens Aerodrome (5km)

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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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