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 Friday 9 October 2026
for the period until midnight CST Monday 12 October 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 ridge lies across the Gulf of Carpentaria and Top End. The ridge will strengthen over the Gulf of Carpentaria from Saturday into early next week.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Friday 9 October until midnight

Winds: Northwesterly 10 to 15 knots decreasing to about 10 knots in the evening. Seas: Below 0.5 metres, increasing to around 1 metre south of Channel Point. Swell: Westerly below 1 metre. Weather: Clear.

Forecast for Saturday 10 October

Winds: Northwesterly 10 to 15 knots becoming variable about 10 knots in the early morning then becoming northwesterly 10 to 15 knots in the early afternoon. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Sunny morning. The chance of a thunderstorm inshore in the afternoon and evening.

Forecast for Sunday 11 October

Winds: Variable about 10 knots becoming northwest to northeasterly 10 to 15 knots in the middle of the day then tending west to northwesterly in the early afternoon. Seas: Below 0.5 metres, increasing to below 1 metre south of Channel Point. Swell: Westerly below 1 metre. Weather: Mostly sunny.

Forecast for Monday 12 October

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

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Friday 9 October until midnight

Winds: Variable about 10 knots. Seas: Below 0.5 metres. Swell: Westerly below 1 metre. Weather: Clear.

Forecast for Saturday 10 October

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

Forecast for Sunday 11 October

Winds: East to northeasterly about 10 knots increasing to 10 to 15 knots in the late afternoon. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Mostly sunny.

Forecast for Monday 12 October

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

Van Diemen Gulf

Forecast for Friday 9 October until midnight

Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots in the early afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Saturday 10 October

Winds: Variable about 10 knots becoming northwest to northeasterly 10 to 15 knots in the early afternoon then tending northeasterly in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Sunday 11 October

Winds: East to northeasterly 10 to 15 knots tending north to northeasterly 15 to 20 knots in the early afternoon. Seas: Around 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Monday 12 October

Winds: East to northeasterly 10 to 15 knots tending north to northeasterly 15 to 20 knots during the afternoon then decreasing to about 10 knots during the evening. Seas: Around 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Arafura Coast: Cape Don to Cape Wessel

Forecast for Friday 9 October until midnight

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

Forecast for Saturday 10 October

Winds: Easterly about 10 knots increasing to 10 to 15 knots in the morning. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny.

Forecast for Sunday 11 October

Winds: Easterly 15 to 20 knots. Seas: Below 1 metre, increasing to 1 to 1.5 metres east of Maningrida during the morning. Swell: East to northeasterly around 1 metre. Weather: Mostly sunny.

Forecast for Monday 12 October

Winds: Easterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres in the far north. Swell: Easterly around 1 metre. Weather: Mostly sunny.

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Friday 9 October until midnight

Winds: Easterly 10 to 15 knots, reaching up to 20 knots in the far northeast in the evening. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: Clear.

Forecast for Saturday 10 October

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

Forecast for Sunday 11 October

Winds: Easterly 15 to 25 knots. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres during the morning. Swell: Easterly around 1 metre. Weather: Partly cloudy.

Forecast for Monday 12 October

Winds: Easterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 2 metres offshore. Swell: Easterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore north of Cape Wessel during the morning. Weather: Mostly sunny.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Friday 9 October until midnight

Winds: Northeasterly 10 to 15 knots, reaching up to 20 knots inshore in the evening. Seas: Around 1 metre. Swell: Northeasterly below 1 metre. Weather: Clear.

Forecast for Saturday 10 October

Winds: North to northeasterly 10 to 15 knots tending east to northeasterly in the middle of the day then decreasing to about 10 knots in the late evening. Winds reaching up to 20 knots inshore in the evening. Seas: Around 1 metre. Swell: Northeasterly below 1 metre. Weather: Mostly sunny.

Forecast for Sunday 11 October

Winds: East to northeasterly about 10 knots increasing to 10 to 15 knots in the morning then decreasing to about 10 knots in the evening. Seas: Around 1 metre. Swell: Northeasterly around 1 metre. Weather: Mostly sunny.

Forecast for Monday 12 October

Winds: Variable about 10 knots becoming east to northeasterly 10 to 15 knots during the morning then becoming variable about 10 knots during the evening. Seas: Around 1 metre. Swell: Northeasterly around 1 metre. Weather: Mostly sunny.

Darwin Harbour

Forecast for Friday 9 October until midnight

Winds: West to northwesterly about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Saturday 10 October

Winds: Variable below 10 knots becoming northerly 10 to 15 knots in the middle of the day then turning west to northwesterly below 10 knots in the late afternoon. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Sunday 11 October

Winds: Variable about 10 knots becoming north to northeasterly 10 to 15 knots in the early afternoon then becoming north to northwesterly about 10 knots in the evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Sunny.

Forecast for Monday 12 October

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

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

* 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.