Australian Government

Bureau of Meteorology


Coastal Waters Forecast 

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IDD11030

Australian Government Bureau of Meteorology
Northern Territory

Coastal Waters Forecast for the Northern Territory

Issued at 4:00 pm CST on Wednesday 18 September 2019
for the period until midnight CST Saturday 21 September 2019.

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 strong high pressure ridge along the Queensland coast begins weakening from Thursday. A stronger trough will move into the southwest Territory late on Thursday and pushes towards the Top End by the weekend.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Wednesday 18 September until midnight

Winds: Northwest to southwesterly 10 to 15 knots becoming variable about 10 knots in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Thursday 19 September

Winds: Northwest to northeasterly 10 to 15 knots becoming variable about 10 knots early in the morning then becoming west to northwesterly 10 to 15 knots in the early afternoon. Seas: Below 1 metre. Swell: Northwest to northeasterly below 1 metre. Weather: Sunny.

Forecast for Friday 20 September

Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Forecast for Saturday 21 September

Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots during the afternoon then becoming west to northwesterly about 10 knots during the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Wednesday 18 September until midnight

Winds: Northeasterly 10 to 15 knots, reaching up to 20 knots offshore in the evening. Seas: 1 to 1.5 metres. Swell: East to northeasterly below 1 metre. Weather: Clear.

Forecast for Thursday 19 September

Winds: East to northeasterly 10 to 15 knots tending east to southeasterly before dawn then tending east to northeasterly in the early afternoon. Seas: 1 to 1.5 metres, decreasing below 1 metre during the morning. Swell: East to northeasterly around 1 metre. Weather: Mostly sunny.

Forecast for Friday 20 September

Winds: North to northeasterly about 10 knots becoming southeasterly before dawn then becoming east to northeasterly in the middle of the day. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny.

Forecast for Saturday 21 September

Winds: East to northeasterly about 10 knots. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny.

Van Diemen Gulf

Forecast for Wednesday 18 September until midnight

Winds: Northeasterly 10 to 15 knots. Seas: Around 1 metre. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Thursday 19 September

Winds: Variable about 10 knots becoming northerly 10 to 15 knots in the late afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Friday 20 September

Winds: Variable about 10 knots becoming north to northeasterly 10 to 15 knots in the late afternoon. Seas: Below 1 metre, decreasing below 0.5 metres during the morning, then increasing to around 1 metre by early evening. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Saturday 21 September

Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Arafura Coast: Cape Don to Cape Wessel

Forecast for Wednesday 18 September until midnight

Winds: East to southeasterly 10 to 15 knots tending east to northeasterly in the evening. Seas: Around 1 metre. Swell: Easterly below 1 metre. Weather: Mostly clear.

Forecast for Thursday 19 September

Winds: Easterly 10 to 15 knots. Seas: Around 1 metre. Swell: Easterly below 1 metre. Weather: Mostly sunny.

Forecast for Friday 20 September

Winds: East to southeasterly 10 to 15 knots. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: Partly cloudy.

Forecast for Saturday 21 September

Winds: Easterly 10 to 15 knots decreasing to about 10 knots during the evening. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny.

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Wednesday 18 September until midnight

Winds: Southeasterly 10 to 15 knots. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly clear.

Forecast for Thursday 19 September

Winds: East to southeasterly 10 to 15 knots, reaching up to 20 knots in the far northeast early in the morning and again in the late evening. Seas: Around 1 metre. Swell: Easterly below 1 metre. Weather: Partly cloudy.

Forecast for Friday 20 September

Winds: East to southeasterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres during the morning, then decreasing to 1 metre by early evening. Swell: East to northeasterly below 1 metre. Weather: Partly cloudy.

Forecast for Saturday 21 September

Winds: East to southeasterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore during the morning. Swell: Easterly below 1 metre. Weather: Partly cloudy.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Wednesday 18 September until midnight

Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Northeasterly below 1 metre. Weather: Clear.

Forecast for Thursday 19 September

Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny. Areas of morning fog west of Groote Eylandt with reduced visibility.

Forecast for Friday 20 September

Winds: Variable about 10 knots becoming easterly 10 to 15 knots before dawn. Seas: Around 1 metre. Swell: Northeasterly below 1 metre. Weather: Mostly sunny. Areas of morning fog west of Groote Eylandt with reduced visibility.

Forecast for Saturday 21 September

Winds: East to southeasterly about 10 knots tending east to northeasterly 10 to 15 knots during the morning then becoming variable about 10 knots during the afternoon. Seas: Below 1 metre. Swell: Northeasterly below 1 metre. Weather: Mostly sunny.

Darwin Harbour

Forecast for Wednesday 18 September until midnight

Winds: North to northwesterly 10 to 15 knots becoming variable about 10 knots in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Thursday 19 September

Winds: West to southwesterly below 10 knots becoming southerly before dawn then becoming north to northwesterly in the morning. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Forecast for Friday 20 September

Winds: West to southwesterly below 10 knots becoming southerly before dawn then becoming west to northwesterly in the morning. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Forecast for Saturday 21 September

Winds: North to northwesterly below 10 knots becoming northeasterly during the morning then becoming north to northwesterly during the day. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly sunny.

The next routine forecast will be issued at 4:45 am CST Thursday.

* 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 Forecasts for information on wind, wave and weather conditions for neighbouring coastal zones.