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 Monday 29 June 2026
for the period until midnight CST Thursday 2 July 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 weakening ridge over northern parts of the NT will continue to direct east to southeasterly winds over coastal waters over coming days.

Beagle Bonaparte Coast: WA-NT Border to Cape Fourcroy

Forecast for Monday 29 June until midnight

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

Forecast for Tuesday 30 June

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

Forecast for Wednesday 1 July

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

Forecast for Thursday 2 July

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

North Tiwi Coast: Cape Fourcroy to Cape Don

Forecast for Monday 29 June until midnight

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

Forecast for Tuesday 30 June

Winds: East to southeasterly 10 to 15 knots tending east to northeasterly below 10 knots during the afternoon and evening. Seas: Below 1 metre. Swell: East to northeasterly below 1 metre. Weather: Partly cloudy. 60% chance of showers.

Forecast for Wednesday 1 July

Winds: Easterly about 10 knots increasing to 10 to 15 knots in the early morning then decreasing to about 10 knots in the late evening. Seas: Below 1 metre. Swell: East to northeasterly around 1 metre. Weather: Partly cloudy.

Forecast for Thursday 2 July

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

Van Diemen Gulf

Forecast for Monday 29 June until midnight

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

Forecast for Tuesday 30 June

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

Forecast for Wednesday 1 July

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

Forecast for Thursday 2 July

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

Arafura Coast: Cape Don to Cape Wessel

Forecast for Monday 29 June until midnight

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

Forecast for Tuesday 30 June

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

Forecast for Wednesday 1 July

Winds: Easterly 10 to 15 knots. Seas: Around 1 metre. Swell: Easterly around 1 metre. Weather: Partly cloudy.

Forecast for Thursday 2 July

Winds: Easterly 15 to 20 knots. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore east of Maningrida. Swell: Easterly around 1 metre. Weather: Partly cloudy.

Gove Peninsula Coast: Cape Wessel to Cape Arnhem

Forecast for Monday 29 June until midnight

Winds: Easterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre later in the evening. Swell: Easterly around 1 metre. Weather: Mostly clear.

Forecast for Tuesday 30 June

Winds: Easterly 15 to 20 knots, reaching up to 25 knots in the far northeast in the late evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore. Swell: Easterly below 1 metre. Weather: Mostly sunny.

Forecast for Wednesday 1 July

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

Forecast for Thursday 2 July

Winds: Easterly 15 to 20 knots. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres offshore south of Cape Wessel during the morning. Swell: Easterly around 1 metre. Weather: Partly cloudy.

Roper Groote Coast: Cape Arnhem to QLD-NT Border

Forecast for Monday 29 June until midnight

Winds: Easterly 10 to 15 knots, reaching up to 20 knots northeast of Groote Eylandt in the early afternoon. Winds decreasing to about 10 knots in the evening. Seas: 1 to 1.5 metres, decreasing below 1 metre later in the evening. Swell: Easterly around 1 metre. Weather: Mostly clear.

Forecast for Tuesday 30 June

Winds: Southeasterly 10 to 15 knots, reaching up to 20 knots northeast of Groote Eylandt during the morning and early afternoon. Winds turning easterly during the morning. Seas: Below 1 metre, increasing to 1 to 1.5 metres north of Numbulwar during the morning. Swell: Easterly around 1 metre. Weather: Partly cloudy.

Forecast for Wednesday 1 July

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

Forecast for Thursday 2 July

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

Darwin Harbour

Forecast for Monday 29 June until midnight

Winds: North to northeasterly below 10 knots becoming west to southwesterly in the evening. Seas: Below 0.5 metres. Swell: Below 0.5 metres. Weather: Clear.

Forecast for Tuesday 30 June

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

Forecast for Wednesday 1 July

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

Forecast for Thursday 2 July

Winds: East to southeasterly below 10 knots tending north to northeasterly 10 to 15 knots during the afternoon then decreasing to below 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 Monday.

* 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.