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BoM Cethana Marine Weather Forecast

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Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: Variable about 10 knots becoming northerly 10 to 15 knots in the evening.
Seas: Below 1 metre.
Swell: Southerly below 1 metre.
Forecast for Monday, 14 September
Weather: Partly cloudy.
Winds: Northerly 10 to 15 knots turning west to northwesterly 15 to 20 knots during the morning. Winds reaching up to 30 knots about Banks Strait in the late afternoon.
Seas: Around 1 metre, increasing to 1.5 to 2.5 metres around midday.
Swell: South to southeasterly below 1 metre.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 70% chance of showers. The chance of a thunderstorm about Banks Strait in the afternoon and evening.
Winds: Westerly 20 to 25 knots increasing to 20 to 30 knots before dawn then tending southwesterly 15 to 25 knots in the evening.
Seas: 1.5 to 2.5 metres.
Swell: Northwest to southwesterly around 1 metre.
Forecast for Wednesday, 16 September
Weather: Partly cloudy.
Winds: Southwesterly 15 to 20 knots decreasing to about 10 knots during the evening.
Seas: 1 to 1.5 metres, decreasing to 1 metre during the afternoon.
Swell: Northwest to southwesterly below 1 metre, increasing to 1 to 1.5 metres about Banks Strait during the evening.

Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: North to northeasterly about 10 knots, reaching up to 20 knots offshore in the late evening.
Seas: Around 1 metre.
Swell: Westerly below 1 metre.
Forecast for Monday, 14 September
Weather: Partly cloudy. 70% chance of showers.
Winds: Northerly 10 to 15 knots turning west to northwesterly 15 to 25 knots early in the morning. Winds reaching up to 30 knots inshore in the late afternoon.
Seas: Around 1 metre, increasing to 1 to 2 metres around midday.
Swell: Westerly below 1 metre.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 80% chance of showers, with possible small hail offshore. The chance of a thunderstorm inshore in the afternoon.
Winds: Westerly 20 to 30 knots turning southwesterly in the early afternoon.
Seas: 2 to 3 metres.
Swell: Westerly below 1 metre inshore, increasing to 1 to 2 metres offshore during the morning.
Forecast for Wednesday, 16 September
Weather: Partly cloudy.
Winds: Southwesterly 20 to 30 knots decreasing to 15 to 20 knots during the morning.
Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the afternoon.
Swell: Westerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.

Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: North to northwesterly 15 to 25 knots, reaching up to 30 knots offshore in the late evening.
Seas: 1.5 to 2 metres.
Swell: Southwesterly 2 to 2.5 metres.
Forecast for Monday, 14 September
Weather: Cloudy. 95% chance of showers, with possible small hail in the evening.
Winds: North to northwesterly 15 to 25 knots, reaching up to 30 knots during the afternoon and evening. Winds turning westerly 20 to 25 knots in the evening.
Seas: 1.5 to 2 metres, increasing to 2 to 3 metres during the afternoon.
Swell: Southwesterly 1.5 to 2 metres, tending westerly 2 to 3 metres by early evening.
Forecast for Tuesday, 15 September
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the morning. Possible small hail.
Winds: Westerly 20 to 30 knots turning southwesterly 25 to 30 knots in the morning.
Seas: 2 to 3 metres.
Swell: Westerly 3 metres, increasing to 3 to 5 metres during the morning, then tending southwesterly 5 metres during the afternoon.
Forecast for Wednesday, 16 September
Weather: Cloudy. 60% chance of showers.
Winds: Southwesterly 20 to 30 knots.
Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning.
Swell: Southwesterly 5 to 6 metres.

Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: Northerly 10 to 15 knots, reaching up to 20 knots offshore in the evening.
Seas: Below 1 metre, increasing to 1 to 1.5 metres offshore later in the evening.
Swell: Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Forecast for Monday, 14 September
Weather: Mostly sunny.
Winds: North to northwesterly 15 to 20 knots tending west to northwesterly 15 to 25 knots during the morning. Winds reaching up to 30 knots during the afternoon and evening.
Seas: 1 to 2 metres, increasing to 2 to 3 metres by early evening.
Swell: Southerly around 1 metre.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 90% chance of showers. The chance of a thunderstorm in the afternoon and evening. Possible small hail offshore from the late morning.
Winds: Westerly 20 to 30 knots turning southwesterly in the late afternoon.
Seas: 1.5 to 2.5 metres.
Swell: Southerly below 1 metre inshore, increasing to 1 to 1.5 metres offshore during the afternoon.
Forecast for Wednesday, 16 September
Weather: Partly cloudy.
Winds: Southwesterly 20 to 30 knots decreasing to 10 to 15 knots during the evening.
Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the evening.
Swell: Southerly 1.5 to 2.5 metres.

Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: North to northwesterly 15 to 20 knots.
Seas: 1 to 1.5 metres, decreasing to 1 metre later in the evening.
Swell: Southwesterly 1.5 to 2.5 metres.
Forecast for Monday, 14 September
Weather: Cloudy. 80% chance of showers.
Winds: Northwesterly 15 to 20 knots turning westerly 20 to 25 knots during the day. Winds reaching up to 30 knots south of King Island in the evening.
Seas: Around 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 1.5 to 2.5 metres during the afternoon.
Swell: Southwesterly 1 to 2 metres, tending westerly 1.5 to 2.5 metres by early evening.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 95% chance of showers, with possible small hail.
Winds: Westerly 25 to 30 knots turning southwesterly in the morning.
Seas: 2 to 3 metres.
Swell: West to southwesterly 2 to 3 metres, increasing to 4 to 5 metres south of King Island during the morning.
Forecast for Wednesday, 16 September
Weather: Cloudy.
Winds: South to southwesterly 20 to 30 knots decreasing to 15 to 20 knots during the morning.
Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning.
Swell: Southwesterly 3 to 5 metres.

Forecast for Sunday, 13 September
Weather: Mostly clear.
Winds: Northerly 15 to 20 knots, reaching up to 25 knots offshore in the evening.
Seas: 1 to 1.5 metres, increasing to 1.5 to 2 metres offshore by early evening.
Swell: South to southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2.5 metres offshore.
Forecast for Monday, 14 September
Weather: Mostly sunny. 50% chance of showers.
Winds: Northerly 15 to 20 knots turning west to northwesterly in the late afternoon. Winds reaching up to 25 knots offshore early in the morning and again in the evening.
Seas: 1 to 1.5 metres, increasing to 1 to 2 metres offshore.
Swell: South to southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres around midday, then tending southwesterly 1 to 2 metres by early evening.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 95% chance of showers, with possible small hail.
Winds: Westerly 15 to 25 knots turning southwesterly 20 to 30 knots in the middle of the day.
Seas: 1.5 to 2 metres, increasing to 2 to 3 metres around midday.
Swell: Southwesterly 2 to 3 metres.
Forecast for Wednesday, 16 September
Weather: Cloudy. 80% chance of showers, with possible small hail in the morning.
Winds: Southwesterly 20 to 30 knots.
Seas: 2 to 3 metres.
Swell: Southwesterly 3 to 5 metres.

Forecast for Sunday, 13 September
Weather: Mostly clear.
Winds: Northerly 15 to 20 knots.
Seas: 1 to 1.5 metres.
Swell: Southwesterly 2.5 to 3 metres.
Forecast for Monday, 14 September
Weather: Partly cloudy. 90% chance of showers, with possible small hail offshore at night.
Winds: North to northwesterly 15 to 20 knots tending west to northwesterly 15 to 25 knots in the late morning. Winds reaching up to 30 knots during the day.
Seas: 1 to 1.5 metres, increasing to 2 to 3 metres around midday.
Swell: Southwesterly 2 to 2.5 metres, tending westerly 2 to 3 metres by early evening.
Forecast for Tuesday, 15 September
Weather: Cloudy. Near 100% chance of showers. The chance of a thunderstorm in the early morning. Possible small hail.
Winds: Westerly 25 to 30 knots tending southwesterly in the middle of the day.
Seas: 2.5 to 3 metres.
Swell: Westerly 2.5 to 4 metres, tending southwesterly 3 to 5 metres around midday.
Forecast for Wednesday, 16 September
Weather: Cloudy. 80% chance of showers, with possible small hail in the morning.
Winds: Southwesterly 20 to 30 knots turning westerly 25 to 30 knots during the afternoon.
Seas: 2 to 3 metres.
Swell: Southwesterly 4 to 6 metres.

Forecast for Sunday, 13 September
Weather: Partly cloudy.
Winds: Northwesterly 20 to 25 knots, reaching up to 30 knots in the late evening.
Seas: 1.5 to 2 metres.
Swell: Southwesterly 2.5 to 3 metres.
Forecast for Monday, 14 September
Weather: Cloudy. 95% chance of showers, with possible small hail in the evening.
Winds: Northwesterly 20 to 30 knots, reaching up to 35 knots near Maatsuyker Island in the late afternoon. Winds tending westerly 25 to 30 knots in the evening.
Seas: 2 to 3 metres.
Swell: Southwesterly 2 to 2.5 metres, tending westerly 2.5 to 3 metres by early evening.
Forecast for Tuesday, 15 September
Weather: Cloudy. Near 100% chance of showers. The chance of a thunderstorm in the early morning. Possible small hail.
Winds: Westerly 25 to 30 knots turning southwesterly in the morning.
Seas: 2.5 to 3 metres.
Swell: Westerly 3 to 5 metres, tending southwesterly 5 metres by early evening.
Forecast for Wednesday, 16 September
Weather: Cloudy. 80% chance of showers.
Winds: Southwesterly 20 to 30 knots turning westerly during the afternoon.
Seas: 1.5 to 2.5 metres.
Swell: Southwesterly 5 to 6 metres.

Forecast for Sunday, 13 September
Weather: Mostly clear.
Winds: Northerly 15 to 20 knots.
Seas: 1 to 1.5 metres.
Swell: Southerly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Forecast for Monday, 14 September
Weather: Sunny.
Winds: Northerly 15 to 20 knots turning northwesterly 20 to 25 knots during the morning and early afternoon. Winds reaching up to 30 knots offshore during the afternoon and evening.
Seas: 1 to 1.5 metres, increasing to 1.5 to 2.5 metres offshore around midday.
Swell: Southerly 1 to 1.5 metres, decreasing to around 1 metre during the morning.
Forecast for Tuesday, 15 September
Weather: Partly cloudy. 90% chance of showers. The chance of a thunderstorm in the afternoon. Possible small hail offshore.
Winds: Northwesterly 20 to 30 knots turning west to southwesterly 15 to 25 knots before dawn then becoming southwesterly 20 to 30 knots in the late afternoon.
Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 2 to 3 metres by early evening.
Swell: South to southwesterly below 1 metre inshore, increasing to 1 to 2 metres offshore during the afternoon.
Forecast for Wednesday, 16 September
Weather: Cloudy. 60% chance of showers, with possible small hail in the morning.
Winds: Southwesterly 20 to 30 knots decreasing to 15 to 20 knots during the evening.
Seas: 2 to 3 metres, decreasing to 1.5 to 2 metres during the afternoon or evening.
Swell: Southerly 2 to 3 metres.
Sheffield
▲ N
Calm
· 11 °C
Warnings
No warnings within 100 km.
State Wide
Marine
View all TAS warnings
Temperature
Cethana
11 °C 17 °C 3pm 5 °C 4am
↓ Cooling
Now: 11 °C
Tides
Ulverstone
7:35pm 0.66m 1:36am 3.24m
↑ Rising
Current: 0.71m
Weather Now for Cethana
Shower or two.
11 °C
Feels like 11 °C
Wind
Calm E
Humidity
94%
Pressure
1017 hPa
At Sheffield
Nearby Wind
50 km radius
N S W E Calm Sheffield 7 kn Devonport
Cethana
Calm E
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