Dianas Basin Weather Forecast
- 13
- 26
Mostly clear
- 13
- 22
Sunny
- 15
- 29
Showers increasing
- 11
- 21
Sunny
- 11
- 24
Shower or two
- 13
- 20
Possible shower
- 11
- 19
Cloudy
Today 20 Feb St Helens
Mostly clear. Winds northwesterly 20 to 25 km/h.
Upper East Coastal Waters
St Helens Point to Wineglass Bay- Wind
- Northwesterly 15 to 20 knots, reaching up to 30 knots offshore.
- Seas
- 1 to 1.5 metres, increasing to 2 to 2.5 metres offshore.
- 1st Swell
- Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore.
- Weather
- Clear.
- Weather Situation
- A weak cold front approaches and crosses the south of the state late Friday, clearing to the east by early Saturday as a high pressure system is expected to quickly move over the state during Saturday. A strong cold front approaches from the west on Sunday, expected to cross Tasmania during Sunday afternoon followed by another high pressure system to move over from the west on Monday. The high is expected to move over the Tasman Sea on Tuesday as a trough and associated cold front approach the west of Tasmania.
Dianas Basin Temperature Statistics View More
February Temperature
St Helens Aerodrome (5km)
Lowest 13 February, 2026
8.3 °CAverage February
17.3 °CHighest 4 February, 2026
29.4 °C
Climate (2021–Present)
St Helens Aerodrome (5km)
Average Low 2021–2026
9.3 °CAverage 2021–2026
13.3 °CAverage High 2021–2026
18.2 °C