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 2:30 pm CST on Thursday 9 April 2026
for the period until midnight CST Sunday 12 April 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 weak ridge persists over the Territory, maintaining east to southeasterly winds over coastal waters. A new ridge strengthens winds in the Gulf of Carpentaria from Sunday.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Thursday 9 April until midnight

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm.

Forecast for Friday 10 April

Winds: Variable about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: The chance of a thunderstorm in the morning. Sunny afternoon.

Forecast for Saturday 11 April

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

Forecast for Sunday 12 April

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

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Thursday 9 April until midnight

Winds: East to southeasterly below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm.

Forecast for Friday 10 April

Winds: East to southeasterly about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning.

Forecast for Saturday 11 April

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Sunday 12 April

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Sunny.

Van Diemen Gulf

Forecast for Thursday 9 April until midnight

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm.

Forecast for Friday 10 April

Winds: East to southeasterly about 10 knots becoming north to northeasterly in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: 50% chance of showers in the early morning. The chance of a thunderstorm in the early morning. Mostly sunny day.

Forecast for Saturday 11 April

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

Forecast for Sunday 12 April

Winds: Variable about 10 knots becoming northeasterly 10 to 15 knots during the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Arafura Coast: Cape Don to Cape Wessel

Forecast for Thursday 9 April until midnight

Winds: East to southeasterly 10 to 15 knots decreasing to about 10 knots in the late afternoon then increasing to 10 to 15 knots in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm inshore.

Forecast for Friday 10 April

Winds: Southeasterly 10 to 15 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Saturday 11 April

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

Forecast for Sunday 12 April

Winds: East to southeasterly about 10 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Thursday 9 April until midnight

Winds: Southeasterly 10 to 15 knots decreasing to about 10 knots in the late evening. Seas: Below 1 metre. Weather: Mostly clear.

Forecast for Friday 10 April

Winds: Southeasterly about 10 knots increasing to 10 to 15 knots before dawn then decreasing to about 10 knots in the middle of the day. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Saturday 11 April

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

Forecast for Sunday 12 April

Winds: Southeasterly 10 to 15 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Thursday 9 April until midnight

Winds: East to southeasterly 10 to 15 knots decreasing to about 10 knots in the late evening. Seas: Below 1 metre. Weather: Mostly clear.

Forecast for Friday 10 April

Winds: East to southeasterly 10 to 15 knots decreasing to about 10 knots in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Saturday 11 April

Winds: Variable about 10 knots becoming east to southeasterly 10 to 15 knots in the morning then becoming variable about 10 knots in the middle of the day. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Forecast for Sunday 12 April

Winds: South to southeasterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore south of Numbulwar during the afternoon. Swell: Below 0.5 metres. Weather: Sunny.

Darwin Harbour

Forecast for Thursday 9 April until midnight

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm.

Forecast for Friday 10 April

Winds: East to southeasterly below 10 knots becoming northeasterly in the middle of the day then becoming north to northwesterly in the evening. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: The chance of a thunderstorm in the early morning. Mostly sunny day.

Forecast for Saturday 11 April

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Sunday 12 April

Winds: South to southwesterly below 10 knots becoming east to southeasterly during the morning then becoming west to northwesterly during the afternoon. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly sunny.

The next routine forecast will be issued at 8:30 pm 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.