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 Monday 18 October 2021
for the period until midnight CST Thursday 21 October 2021.

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 will extend across the Gulf of Carpentaria and Timor Sea this week, while a heat trough will be located near the northeast Kimberley.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Monday 18 October until midnight

Winds: West to northwesterly 10 to 15 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly clear. The chance of a thunderstorm inshore.

Forecast for Tuesday 19 October

Winds: West to northwesterly 10 to 15 knots tending west to southwesterly in the morning then tending west to northwesterly in the early afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny. The chance of a thunderstorm inshore from the late morning.

Forecast for Wednesday 20 October

Winds: Westerly 10 to 15 knots turning northwesterly during the morning and early afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny. The chance of a thunderstorm inshore from the late morning.

Forecast for Thursday 21 October

Winds: West to northwesterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore south of Channel Point during the evening. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm in the afternoon.

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Monday 18 October until midnight

Winds: Variable about 10 knots. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Mostly clear. The chance of a thunderstorm early this evening.

Forecast for Tuesday 19 October

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

Forecast for Wednesday 20 October

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

Forecast for Thursday 21 October

Winds: West to northwesterly about 10 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny morning. The chance of a thunderstorm in the afternoon.

Van Diemen Gulf

Forecast for Monday 18 October until midnight

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

Forecast for Tuesday 19 October

Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots in the middle of the day then decreasing to about 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 Wednesday 20 October

Winds: North to northwesterly about 10 knots tending west to northwesterly 10 to 15 knots in the middle of the day then tending north to northwesterly in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Thursday 21 October

Winds: Northwesterly 10 to 15 knots. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny morning. The chance of a thunderstorm in the afternoon and evening.

Arafura Coast: Cape Don to Cape Wessel

Forecast for Monday 18 October until midnight

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

Forecast for Tuesday 19 October

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

Forecast for Wednesday 20 October

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

Forecast for Thursday 21 October

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

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Monday 18 October until midnight

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

Forecast for Tuesday 19 October

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

Forecast for Wednesday 20 October

Winds: East to northeasterly about 10 knots increasing to 10 to 15 knots before dawn then becoming variable about 10 knots in the middle of the day. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Mostly sunny.

Forecast for Thursday 21 October

Winds: East to northeasterly about 10 knots tending north to northeasterly 10 to 15 knots during the morning then becoming variable about 10 knots during the afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Monday 18 October until midnight

Winds: East to northeasterly 10 to 15 knots tending north to northeasterly in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Tuesday 19 October

Winds: Northwest to northeasterly 10 to 15 knots tending east to northeasterly in the middle of the day then tending north to northeasterly in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny.

Forecast for Wednesday 20 October

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

Forecast for Thursday 21 October

Winds: North to northwesterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore south of Numbulwar. Swell: Below 0.5 metres. Weather: Mostly sunny.

Darwin Harbour

Forecast for Monday 18 October until midnight

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

Forecast for Tuesday 19 October

Winds: North to northwesterly about 10 knots tending west to northwesterly 10 to 15 knots in the middle of the day then decreasing to about 10 knots in the late evening. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Mostly sunny. The chance of a thunderstorm from the late morning.

Forecast for Wednesday 20 October

Winds: West to northwesterly 10 to 15 knots decreasing to about 10 knots in the late afternoon. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm from the late morning.

Forecast for Thursday 21 October

Winds: West to northwesterly about 10 knots increasing to 15 to 20 knots during the day. Seas: Below 1 metre. Swell: Below 0.5 metres. Weather: Partly cloudy. The chance of a thunderstorm.

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

* 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.