Fossil Island Weather Forecast
- 10
- 21
Rain increasing
- 11
- 19
Showers easing
- 10
- 17
Shower or two
- 10
- 16
Showers. Windy
- 8
- 15
Showers. Windy
- 9
- 17
Shower or two
- 10
- 19
Sunny
Today 21 Dec South East
Partly cloudy. Very high chance of rain late this afternoon and evening. Winds west to northwesterly 15 to 20 km/h tending northeast to southeasterly 15 to 25 km/h in the middle of the day then tending southeast to southwesterly 20 to 30 km/h in the evening. Daytime maximum temperatures between 18 and 23.
Lower East Coastal Waters
Wineglass Bay to Tasman Island- Wind
- Variable about 10 knots becoming northeasterly 15 to 20 knots in the middle of the day then turning east to southeasterly 10 to 15 knots in the evening.
- Seas
- Below 1 metre, decreasing below 0.5 metres during the morning, then increasing to around 1 metre around midday.
- 1st Swell
- Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore.
- Weather
- Partly cloudy. 90% chance of rain.
- Weather Situation
- A broad low pressure system near the west of Tasmania clears to the southeast into Sunday morning before a second, more intense, low pressure system is forecast to move across Bass Strait during Sunday and clear to the east Monday morning. A ridge of high pressure is expected to extend across the southern mainland, forecast to direct a westerly flow over Tasmania from Monday. Cold fronts embedded in the flow are expected to cross Tasmania late Monday and again Wednesday.
Fossil Island Temperature Statistics View More
December Temperature
Tasman Island (23km)
Lowest 7 December, 2025
5.4 °CAverage December
12.4 °CHighest 4 December, 2025
24.6 °C
Climate (2020–Present)
Tasman Island (23km)
Average Low 2020–2025
9.3 °CAverage 2020–2025
11.5 °CAverage High 2020–2025
14.5 °C