Australian Government

Bureau of Meteorology


Coastal Waters Forecast 

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IDD11030

Australian Government Bureau of Meteorology
Northern Territory

Updated Coastal Waters Forecast for the Northern Territory

Issued at 7:00 am CST on Wednesday 8 October 2025
for the period until midnight CST Friday 10 October 2025.

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 over northeastern Australia directs moderate to fresh east to southeasterly winds over the Gulf of Carpentaria for the week. A trough lies over northern Western Australia, helping to steer west to northwesterly winds over the Beagle Bonaparte Gulf.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Wednesday 8 October until midnight

Winds: West to northwesterly about 10 knots increasing to 10 to 15 knots in the middle of the day. Seas: Around 1 metre. Swell: Westerly below 1 metre. Weather: The chance of a thunderstorm offshore north of Channel Point in the morning. Sunny afternoon.

Forecast for Thursday 9 October

Winds: Northwesterly 10 to 15 knots decreasing to about 10 knots in the early morning then increasing to 10 to 15 knots in the morning. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Mostly sunny.

Forecast for Friday 10 October

Winds: Northwesterly 10 to 15 knots becoming variable about 10 knots during the morning then becoming northwest to southwesterly 10 to 15 knots during the afternoon. Seas: Below 1 metre. Swell: Westerly below 1 metre. Weather: Partly cloudy.

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Wednesday 8 October until midnight

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

Forecast for Thursday 9 October

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

Forecast for Friday 10 October

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Westerly below 1 metre. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the afternoon.

Van Diemen Gulf

Forecast for Wednesday 8 October until midnight

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

Forecast for Thursday 9 October

Winds: Variable about 10 knots becoming north to northeasterly 10 to 15 knots in the late afternoon then decreasing to below 10 knots in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny morning. The chance of a thunderstorm inshore in the late afternoon and evening.

Forecast for Friday 10 October

Winds: Variable about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. 60% chance of showers. The chance of a thunderstorm in the afternoon.

Arafura Coast: Cape Don to Cape Wessel

Forecast for Wednesday 8 October until midnight

Winds: Southeasterly 10 to 15 knots turning easterly in the early afternoon. Seas: Below 1 metre. Swell: Easterly below 1 metre. Weather: Partly cloudy. The chance of a thunderstorm offshore east of Maningrida in the morning.

Forecast for Thursday 9 October

Winds: Easterly about 10 knots. Seas: Below 1 metre. Swell: Easterly below 1 metre. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm in the morning and afternoon.

Forecast for Friday 10 October

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

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Wednesday 8 October until midnight

Winds: Southeasterly 10 to 15 knots, reaching up to 20 knots offshore during the morning. Winds turning easterly during the day. Seas: 1 to 1.5 metres, decreasing to 1 metre during the afternoon. Swell: Easterly below 1 metre. Weather: Partly cloudy. 60% chance of showers. The chance of a thunderstorm offshore during the morning and afternoon.

Forecast for Thursday 9 October

Winds: Easterly 10 to 15 knots, reaching up to 20 knots offshore during the morning. Winds decreasing to about 10 knots in the early afternoon. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore south of Cape Wessel during the morning. Swell: Easterly below 1 metre. Weather: Partly cloudy. 60% chance of showers. The chance of a thunderstorm in the morning.

Forecast for Friday 10 October

Winds: Easterly 10 to 15 knots. Seas: Below 1 metre. Swell: Easterly below 1 metre. Weather: Partly cloudy. 50% chance of showers.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Wednesday 8 October until midnight

Winds: Variable about 10 knots becoming easterly 10 to 15 knots in the early morning. Seas: Around 1 metre. Swell: East to northeasterly below 1 metre. Weather: The chance of a thunderstorm northeast of Groote Eylandt this morning. Mostly sunny afternoon.

Forecast for Thursday 9 October

Winds: Variable about 10 knots becoming east to northeasterly 10 to 15 knots in the early morning then decreasing to about 10 knots in the early afternoon. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Partly cloudy. The chance of a thunderstorm in the morning and afternoon.

Forecast for Friday 10 October

Winds: Variable about 10 knots becoming easterly 10 to 15 knots during the morning then becoming variable about 10 knots during the day. Seas: Below 1 metre. Swell: Northeasterly below 1 metre. Weather: Mostly sunny.

Darwin Harbour

Forecast for Wednesday 8 October until midnight

Winds: North to northeasterly below 10 knots becoming west to northwesterly in the morning. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Partly cloudy.

Forecast for Thursday 9 October

Winds: North to northwesterly about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy.

Forecast for Friday 10 October

Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Partly cloudy. 70% chance of showers. The chance of a thunderstorm in the morning and afternoon.

The next routine forecast will be issued at 8:30 am CST Wednesday.

* 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.