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Bureau of Meteorology


Coastal Waters Forecast 

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IDT12410

Australian Government Bureau of Meteorology
Tasmania

Local Waters Forecast for South East Inshore

Issued at 10:00 am EST on Saturday 19 September 2026
for the period until midnight EST Tuesday 22 September 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 high to the north of Tasmania is combining with a cold front passing to the south of Tasmania to direct a vigorous westerly flow over the state, with these conditions to continue into later this morning. A weak ridge is forecast to extend over Tasmania this afternoon and evening, ahead of another cold front to cross the state on Sunday evening. The flow will tend colder southwesterly on Monday morning, with a high to establish over the Bight. This high is expected to move to the north of Tasmania on Tuesday morning and lie to the northeast of the state by Tuesday evening.

Derwent Estuary

Forecast for Saturday 19 September until midnight

Winds: Westerly 15 to 20 knots becoming variable about 10 knots in the evening. Seas: Below 1 metre. Weather: Sunny.

Forecast for Sunday 20 September

Strong Wind Warning for Sunday for Derwent Estuary

Winds: Northwesterly 15 to 25 knots increasing to 20 to 30 knots in the late afternoon then tending westerly 15 to 25 knots in the evening. Seas: Below 0.5 metres, increasing to around 1 metre during the morning. Weather: Mostly sunny.

Forecast for Monday 21 September

Winds: Westerly 15 to 20 knots. Seas: Below 1 metre. Weather: Partly cloudy. 50% chance of showers.

Forecast for Tuesday 22 September

Winds: Northwesterly 10 to 15 knots shifting south to southeasterly below 10 knots during the day then becoming west to northwesterly during the evening. Seas: Below 1 metre. Weather: Partly cloudy.

Channel

Forecast for Saturday 19 September until midnight

Strong Wind Warning for Saturday for Channel

Winds: Westerly 20 to 30 knots decreasing to 15 to 25 knots in the middle of the day then turning north to northwesterly 10 to 15 knots in the evening. Seas: 1 to 2 metres, decreasing below 1 metre by early evening. Weather: Mostly sunny.

Forecast for Sunday 20 September

Strong Wind Warning for Sunday for Channel

Winds: Northerly 15 to 25 knots turning westerly 20 to 30 knots in the late afternoon. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Weather: Partly cloudy. 70% chance of showers, with possible small hail at night.

Forecast for Monday 21 September

Winds: Westerly 20 to 30 knots. Seas: 1.5 to 2.5 metres, decreasing below 1 metre during the evening. Weather: Partly cloudy. 80% chance of showers, with possible small hail.

Forecast for Tuesday 22 September

Winds: West to northwesterly 10 to 15 knots tending west to southwesterly during the afternoon then tending northwest to northeasterly during the evening. Seas: Below 1 metre. Weather: Partly cloudy.

Storm Bay

Forecast for Saturday 19 September until midnight

Strong Wind Warning for Saturday for Storm Bay

Winds: Westerly 20 to 30 knots tending west to southwesterly 15 to 25 knots in the middle of the day then becoming west to northwesterly about 10 knots in the late evening. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon. Weather: Sunny.

Forecast for Sunday 20 September

Strong Wind Warning for Sunday for Storm Bay

Winds: Northerly 15 to 20 knots turning west to northwesterly 20 to 30 knots in the early afternoon. Seas: Around 1 metre, increasing to 1 to 1.5 metres around midday. Weather: Mostly sunny.

Forecast for Monday 21 September

Winds: Westerly 20 to 30 knots. Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the evening. Weather: Partly cloudy. 60% chance of showers, with possible small hail.

Forecast for Tuesday 22 September

Winds: Northwesterly 10 to 15 knots shifting east to southeasterly below 10 knots during the day then becoming variable during the evening. Seas: Below 1 metre. Weather: Partly cloudy.

Frederick Henry Bay and Norfolk Bays

Forecast for Saturday 19 September until midnight

Winds: Southwesterly 15 to 20 knots becoming variable about 10 knots in the evening. Seas: Around 1 metre, decreasing below 0.5 metres later in the evening. Weather: Sunny.

Forecast for Sunday 20 September

Strong Wind Warning for Sunday for Frederick Henry Bay and Norfolk Bay

Winds: Northerly 10 to 15 knots turning west to northwesterly 20 to 30 knots in the late morning and afternoon. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Weather: Sunny.

Forecast for Monday 21 September

Winds: Westerly 15 to 25 knots decreasing to 10 to 15 knots during the evening. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Weather: Partly cloudy. 50% chance of showers, with possible small hail in the morning.

Forecast for Tuesday 22 September

Winds: Northwesterly 10 to 15 knots shifting southeasterly below 10 knots during the day then becoming variable during the afternoon. Seas: Below 1 metre. Weather: Partly cloudy.

The next routine forecast will be issued at 4:05 pm EST Saturday.

* Calls to 1300 number cost around 27.5c inc. 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 Forecast or Local Waters Forecast at http://www.bom.gov.au/tas/forecasts/map.shtml for information on wind, wave and weather conditions for these coastal zones.