Cascades Bay Weather Forecast
- 8
- 12
Showers
- 7
- 15
Possible shower
- 9
- 14
Possible shower
- 8
- 15
Partly cloudy
- 9
- 15
Mostly sunny
- 8
- 16
Mostly sunny
- 10
- 17
Showers
Today 26 Aug South East
Partly cloudy. Slight chance of a shower, becoming less likely later this evening. Winds southwesterly 25 to 35 km/h turning west to northwesterly 15 to 20 km/h in the late evening.
Frederick Henry Bay and Norfolk Bay Boating
- Wind
- Southwesterly 15 to 25 knots decreasing to about 10 knots in the late evening.
- Seas
- 1.5 to 2.5 metres, decreasing to 1 metre later in the evening.
- Weather
- Cloudy. 50% chance of showers.
- Weather Situation
- A high pressure system over South Australia will extend a ridge over Tasmania this evening, with the high to move to north of the state on Thursday. A cold front will approach the southwest late Thursday and cross Tasmania early Friday. Another high pressure system is expected to build south of the Bight on Saturday and extend a ridge to the north of Tasmania, with the high centre to move near Adelaide on Sunday and extend a ridge over Tasmania.
Cascades Bay Temperature Statistics View More
August Temperature
Tasman Island (25km)
Lowest 23 August, 2026
6 °CAverage August
10 °CHighest 20 August, 2026
17.1 °C
Climate (2021–2026)
Tasman Island (25km)
Average Low 2021–2026
9.4 °CAverage 2021–2026
11.6 °CAverage High 2021–2026
14.6 °C