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Bureau of Meteorology


Coastal Waters Forecast 

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IDT12331

Australian Government Bureau of Meteorology
Tasmania

Coastal Waters Forecast for Tasmania
Eastern Zones: Northern Tip of Flinders Island to Tasman Island

Issued at 4:00 am EDT on Thursday 11 December 2025
for the period until midnight EDT Saturday 13 December 2025.

Please be aware
Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height.

Warning Information

For latest warnings go to www.bom.gov.au, subscribe to RSS feeds, call 1300 659 210* or listen for warnings on relevant TV and radio broadcasts.

Weather Situation

A high pressure system is expected to move over the state today and continue moving eastwards over the Tasman Sea during Friday. A cold front is then forecast to cross the state during Saturday

East of Flinders Island: Northern Tip of Flinders Island to St Helens Point

Forecast for Thursday 11 December until midnight

Winds: South to southeasterly 15 to 20 knots turning east to northeasterly in the late morning and early afternoon. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: Southeast to southwesterly around 1 metre. Weather: Sunny.

Forecast for Friday 12 December

Strong Wind Warning for Friday for East of Flinders Island

Winds: Northeasterly 15 to 20 knots, reaching up to 30 knots offshore in the late evening. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres during the morning. 1st Swell: Southeasterly below 0.5 metres, tending northeasterly 1 to 1.5 metres during the morning. 2nd Swell: Southerly around 1 metre. Weather: Sunny.

Forecast for Saturday 13 December

Winds: Northerly 15 to 25 knots turning west to northwesterly 10 to 15 knots during the day. Seas: 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Swell: Northeasterly 1.5 to 2 metres, decreasing to 1.5 metres during the evening. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

Banks Strait and Franklin Sound

Forecast for Thursday 11 December until midnight

Winds: Southeasterly 10 to 15 knots, reaching up to 20 knots offshore early in the morning. Winds turning east to northeasterly in the late morning and early afternoon. Seas: Around 1 metre. Swell: Northwest to southwesterly below 1 metre. Weather: Sunny.

Forecast for Friday 12 December

Winds: Northeasterly 15 to 20 knots. Seas: Around 1 metre. Swell: Northeast to southeasterly below 0.5 metres, tending northeasterly 1 to 1.5 metres around midday. Weather: Mostly sunny.

Forecast for Saturday 13 December

Winds: Northerly 15 to 20 knots turning west to northwesterly 10 to 15 knots during the day. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: East to northeasterly 1 to 1.5 metres, increasing to 1 to 2 metres about Banks Strait. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

Upper East Coast: St Helens Point to Wineglass Bay

Forecast for Thursday 11 December until midnight

Winds: Southerly 10 to 15 knots, reaching up to 20 knots offshore early in the morning. Winds shifting east to northeasterly below 10 knots in the late morning then tending north to northeasterly 10 to 15 knots in the evening. Seas: Around 1 metre. Swell: Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore. Weather: Mostly sunny.

Forecast for Friday 12 December

Strong Wind Warning for Friday for Upper East Coast

Winds: Northerly 15 to 20 knots increasing to 15 to 25 knots in the early afternoon. Winds reaching up to 30 knots inshore in the late afternoon. Seas: Around 1 metre, increasing to 1 to 2 metres during the morning. Swell: Southerly around 1 metre. Weather: Partly cloudy.

Forecast for Saturday 13 December

Winds: Northerly 15 to 25 knots tending northeast to southeasterly 15 to 20 knots during the afternoon then becoming variable about 10 knots during the evening. Seas: 1 to 2 metres, decreasing to 1 metre during the morning. Swell: Northeasterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

Lower East Coast: Wineglass Bay to Tasman Island

Forecast for Thursday 11 December until midnight

Winds: Southwesterly 10 to 15 knots, reaching up to 20 knots offshore early in the morning. Winds becoming variable about 10 knots in the late afternoon then becoming north to northeasterly 10 to 15 knots in the evening. Seas: 1 to 1.5 metres, decreasing below 1 metre around midday. Swell: Southwesterly around 1 metre inshore, increasing to 1.5 to 2.5 metres offshore. Weather: Partly cloudy.

Forecast for Friday 12 December

Strong Wind Warning for Friday for Lower East Coast

Winds: Northerly 15 to 25 knots, reaching up to 30 knots during the afternoon and evening. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 2 to 3 metres around midday. Swell: Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres around midday. Weather: Mostly sunny.

Forecast for Saturday 13 December

Winds: North to northwesterly 20 to 30 knots shifting south to southeasterly 15 to 20 knots during the morning then becoming variable about 10 knots during the evening. Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning. 1st Swell: Southwesterly 1 to 1.5 metres, increasing to 1 to 2 metres during the afternoon or evening. 2nd Swell: Northeasterly below 1 metre, increasing to 1.5 to 2 metres during the morning. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

South East Coast: Tasman Island to South East Cape

Forecast for Thursday 11 December until midnight

Winds: West to southwesterly 15 to 20 knots becoming variable about 10 knots in the late afternoon then becoming north to northeasterly 10 to 15 knots in the late evening. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon. Swell: Southwesterly 2.5 to 3 metres. Weather: Partly cloudy.

Forecast for Friday 12 December

Strong Wind Warning for Friday for South East Coast

Winds: North to northeasterly 15 to 25 knots, reaching up to 30 knots in the evening. Winds tending north to northwesterly in the late evening. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 1.5 to 2.5 metres during the afternoon. 1st Swell: Southwesterly 1.5 to 2.5 metres. 2nd Swell: Northeast to southeasterly below 1 metre inshore, increasing to 1 to 1.5 metres offshore during the afternoon. Weather: Mostly sunny.

Forecast for Saturday 13 December

Winds: North to northwesterly 20 to 30 knots tending northwest to southwesterly 15 to 20 knots during the morning then tending north to northwesterly during the evening. Seas: 1.5 to 2.5 metres. 1st Swell: Southwesterly 1.5 to 2.5 metres. 2nd Swell: Northeasterly 1 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

South West Coast: South East Cape to Low Rocky Point

Forecast for Thursday 11 December until midnight

Winds: Westerly 10 to 15 knots, reaching up to 20 knots inshore during the morning. Winds becoming variable about 10 knots in the evening. Seas: 1 to 1.5 metres, decreasing below 1 metre around midday. Swell: Southwesterly 2.5 to 3 metres. Weather: Partly cloudy.

Forecast for Friday 12 December

Winds: Northwest to northeasterly 10 to 15 knots tending northeast to southeasterly in the early afternoon then becoming variable about 10 knots in the late afternoon. Seas: Below 1 metre. 1st Swell: Southwesterly 2 to 2.5 metres. 2nd Swell: Northeast to southeasterly around 1 metre. Weather: Mostly sunny.

Forecast for Saturday 13 December

Winds: West to northwesterly 20 to 30 knots. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning. 1st Swell: Southwesterly 2 to 2.5 metres. 2nd Swell: East to northeasterly 1 to 1.5 metres, decreasing to around 1 metre during the morning. Weather: Partly cloudy. 70% chance of showers.

The next routine forecast will be issued at 10:00 am EDT Thursday.

* Calls to 1300 numbers cost around 27.5c incl. GST, higher from mobiles or public phones. Marine forecasts are also available on VHF and HF radio. View the radio schedule on www.bom.gov.au/marine

Check the latest Coastal Waters Forecasts for information on wind, wave and weather conditions for neighbouring coastal zones.