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Bureau of Meteorology


Coastal Waters Forecast 

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IDT12331

Australian Government Bureau of Meteorology
Tasmania

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

Issued at 5:24 am EST on Tuesday 25 August 2026
for the period until midnight EST Thursday 27 August 2026.

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 low pressure system over Victoria on Tuesday morning is expected to broaden and move south over Tasmania during the day, before moving away to the east on Wednesday morning. A high pressure system over South Australia is expected to extend a ridge over Tasmania later Wednesday, before moving to north of the state on Thursday. A cold front is expected to approach the southwest late Thursday, crossing during Friday.

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

Forecast for Tuesday 25 August until midnight

Winds: East to southeasterly 10 to 15 knots shifting westerly in the late afternoon. Winds reaching up to 20 knots offshore during the morning and again in the late evening. Seas: Around 1 metre. 1st Swell: Northeasterly around 1 metre, increasing to 1 to 1.5 metres later in the evening. 2nd Swell: Southerly around 1 metre. Weather: Cloudy. 95% chance of showers.

Forecast for Wednesday 26 August

Strong Wind Warning for Wednesday for East of Flinders Island

Winds: Westerly 15 to 20 knots turning south to southwesterly during the morning and early afternoon. Winds reaching up to 30 knots offshore in the late afternoon. Seas: 1 to 2 metres. 1st Swell: South to southeasterly 1 to 1.5 metres, increasing to 2 to 3 metres by early evening. 2nd Swell: Northeasterly around 1 metre. Weather: Mostly sunny.

Forecast for Thursday 27 August

Winds: Southerly 10 to 15 knots becoming variable about 10 knots during the morning then becoming west to northwesterly 15 to 20 knots during the day. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon or evening. Swell: Southerly 2.5 to 4 metres, tending southeasterly 2 to 3 metres during the morning. Weather: Mostly sunny.

Banks Strait and Franklin Sound

Forecast for Tuesday 25 August until midnight

Winds: Variable about 10 knots becoming westerly 10 to 15 knots in the early afternoon. Winds reaching up to 20 knots near Eddystone Point in the late evening. Seas: Below 1 metre. Swell: East to northeasterly around 1 metre. Weather: Cloudy. 95% chance of showers.

Forecast for Wednesday 26 August

Winds: Westerly 15 to 25 knots shifting south to southeasterly below 10 knots in the afternoon. Seas: 1 to 2 metres, decreasing to 1 metre around midday. Swell: Northwest to southwesterly below 1 metre, increasing to 1 to 1.5 metres about Banks Strait later in the evening. Weather: Mostly sunny.

Forecast for Thursday 27 August

Winds: Variable below 10 knots becoming west to northwesterly 15 to 20 knots during the morning. Seas: Around 1 metre. Swell: Southeasterly 2 to 3 metres, decreasing to 1 to 2 metres during the afternoon. Weather: Mostly sunny.

Upper East Coast: St Helens Point to Wineglass Bay

Forecast for Tuesday 25 August until midnight

Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots in the morning then tending west to northwesterly in the evening. Seas: Below 1 metre. 1st Swell: Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. 2nd Swell: Northeasterly around 1 metre. Weather: Cloudy. 90% chance of showers.

Forecast for Wednesday 26 August

Gale Warning for Wednesday for Upper East Coast

Winds: West to southwesterly 15 to 25 knots, reaching up to 35 knots offshore in the late morning and early afternoon. Winds increasing to 30 knots before turning southerly 15 to 25 knots in the afternoon. Seas: 1 to 1.5 metres, increasing to 2 to 3 metres during the morning. 1st Swell: Southerly 1 to 1.5 metres, increasing to 2 to 3 metres during the afternoon. 2nd Swell: Northeasterly around 1 metre. Weather: Partly cloudy. 50% chance of showers.

Forecast for Thursday 27 August

Winds: Variable about 10 knots becoming north to northwesterly 15 to 20 knots during the day then tending west to northwesterly during the evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore during the afternoon or evening. Swell: Southeasterly 2 to 3 metres, decreasing to 2 metres during the evening. Weather: Sunny.

Lower East Coast: Wineglass Bay to Tasman Island

Forecast for Tuesday 25 August until midnight

Winds: Variable about 10 knots becoming west to northwesterly 10 to 15 knots in the evening. Seas: Below 1 metre. Swell: South to southwesterly 1 to 1.5 metres inshore, increasing to 2 to 3 metres offshore. Weather: Cloudy. 90% chance of showers.

Forecast for Wednesday 26 August

Gale Warning for Wednesday for Lower East Coast

Winds: Westerly 15 to 25 knots turning southerly 20 to 30 knots during the morning and early afternoon then decreasing to 10 to 15 knots in the evening. Winds reaching up to 35 knots in the late morning. Seas: Around 1 metre, increasing to 2 to 3 metres during the morning, then decreasing to 1 metre later in the evening. 1st Swell: Southerly 2 to 3 metres. 2nd Swell: Northeast to southeasterly 1 to 1.5 metres, tending southeasterly 2 to 3 metres by early evening. Weather: Partly cloudy. 80% chance of showers.

Forecast for Thursday 27 August

Winds: Variable below 10 knots becoming north to northwesterly 10 to 15 knots during the morning then tending west to northwesterly during the evening. Seas: Below 1 metre. Swell: Southeasterly 2 to 3 metres. Weather: Sunny.

South East Coast: Tasman Island to South East Cape

Forecast for Tuesday 25 August until midnight

Winds: East to northeasterly 10 to 15 knots shifting west to northwesterly 15 to 20 knots in the evening. Seas: Around 1 metre. Swell: Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore. Weather: Cloudy. Near 100% chance of rain.

Forecast for Wednesday 26 August

Gale Warning for Wednesday for South East Coast

Winds: West to southwesterly 15 to 25 knots tending south to southwesterly 20 to 30 knots before dawn then tending southeast to southwesterly 15 to 25 knots in the middle of the day. Winds reaching up to 35 knots during the morning. Seas: 1 to 1.5 metres, increasing to 2 to 4 metres during the morning, then decreasing below 1 metre by early evening. 1st Swell: Southwesterly 2.5 to 3 metres. 2nd Swell: Southeasterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning, then tending east to southeasterly 2.5 to 3 metres later in the evening. Weather: Cloudy. 80% chance of showers, with possible small hail offshore in the early morning.

Forecast for Thursday 27 August

Winds: Northwesterly 15 to 20 knots increasing to 15 to 25 knots during the evening. Seas: Below 1 metre, increasing to 1 to 2 metres offshore during the morning. 1st Swell: Southwesterly 1 to 2 metres inshore, increasing to 2 to 3 metres offshore. 2nd Swell: East to southeasterly 2 to 3 metres. Weather: Mostly sunny.

South West Coast: South East Cape to Low Rocky Point

Forecast for Tuesday 25 August until midnight

Strong Wind Warning for Tuesday for South West Coast

Winds: East to northeasterly 10 to 15 knots tending northwest to southwesterly 15 to 20 knots in the early afternoon then tending southeast to southwesterly in the evening. Winds reaching up to 30 knots offshore in the late evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore by early evening. Swell: Southwesterly 3 to 4 metres, decreasing to 3 metres during the morning. Weather: Cloudy. Near 100% chance of rain.

Forecast for Wednesday 26 August

Strong Wind Warning for Wednesday for South West Coast

Winds: Southerly 15 to 25 knots, reaching up to 30 knots early in the morning. Winds becoming variable about 10 knots in the middle of the day then becoming northwesterly 10 to 15 knots in the evening. Seas: 1.5 to 2.5 metres, decreasing to 1 metre around midday. 1st Swell: Southwesterly 2.5 to 3 metres. 2nd Swell: Southeasterly 1 to 1.5 metres, increasing to 1 to 2 metres during the morning, then tending east to southeasterly 1.5 to 2 metres during the afternoon. Weather: Cloudy. 60% chance of showers, with possible small hail in the early morning.

Forecast for Thursday 27 August

Winds: Northwesterly 15 to 25 knots increasing to 20 to 30 knots during the morning. Seas: 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. 1st Swell: Southwesterly 2 to 2.5 metres, tending westerly 2 to 3 metres during the afternoon or evening. 2nd Swell: Easterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon. Weather: Partly cloudy. 80% chance of showers.

The next routine forecast will be issued at 10:00 am EST Tuesday.

* 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.