Coastal Weather

Issued at 12:31 on Tuesday 17 March 2026.

Abel

Tuesday 17 March

Variable 10 knots. Sea slight.

Wednesday 18 March

Variable 10 knots. Westerly 15 knots developing north of Separation Point in the morning, then easing back to variable 10 knots in the evening. Sea slight.

Thursday 19 March

Variable 10 knots, changing Southeast 20 knots north of Separation Point for a time in the and afternoon.

Friday 20 March

Southeast 15 knots.

Saturday 21 March

Southeast 15 knots, easing to variable 10 knots early.

Brett

Tuesday 17 March

Southeast 15 knots. Sea slight. Southeast swell 1 metre.

Wednesday 18 March

Southeast 20 knots. Sea moderate. Easterly swell 1 metre.

Thursday 19 March

Southeast 20 knots. Easterly swell becoming moderate.

Friday 20 March

Southerly 15 knots. Moderate easterly swell.

Saturday 21 March

Southwest 10 knots. Moderate easterly swell easing.

Castlepoint

Tuesday 17 March

Variable 10 knots. Northeast 15 knots developing in the evening. Sea slight. Long period southwest swell 2 metres easing.

Wednesday 18 March

Northerly 20 knots, rising to 30 knots south of Cape Palliser in the morning. Becoming variable 10 knots but southerly 20 knots in the south in the evening. Sea becoming rough in the south for a time. Long period southwest swell 1 metre.

Thursday 19 March

Variable 10 knots but southerly 15 knots south of Cape Palliser, becoming variable 10 knots everywhere in the afternoon.

Friday 20 March

Southeast 10 knots, rising to southerly 20 knots early. Easterly swell becoming moderate.

Saturday 21 March

Southerly 15 knots, easing to variable 10 knots late. Moderate southeast swell.

Chalmers

Tuesday 17 March

Northeast 15 knots, rising to 25 knots in the evening. Sea becoming rough. Long period southwest swell 2 metres.

Wednesday 18 March

Northerly 30 knots, becoming southwest 25 knots in the morning. Easing to variable 10 knots in the evening. Rough sea easing. Southwest swell 2 metres easing for a time. Poor visibility in morning rain.

Thursday 19 March

Variable 10 knots, becoming northeast 15 knots for a time in the morning and afternoon. Moderate southwest swell easing.

Friday 20 March

Variable 10 knots. Southwest swell becoming moderate.

Saturday 21 March

Becoming northerly 15 knots early. Moderate southwest swell easing.

Chatham Islands

Tuesday 17 March

Variable 10 knots. Sea slight. Long period southwest swell 3 metres, easing. Fair visibility in morning showers.

Wednesday 18 March

Variable 10 knots. Northerly 20 knots developing early morning. Sea becoming moderate. Long period southwest swell 2 metres.

Thursday 19 March

Northeast 15 knots.

Friday 20 March

Easterly 15 knots, rising to southeast 25 knots early. Sea becoming rough. Moderate southeast swell developing.

Saturday 21 March

Southerly 25 knots. Sea rough. Moderate southerly swell.

Colville

Tuesday 17 March

Variable 10 knots. Sea slight. Southeast swell 1 metre.

Wednesday 18 March

Variable 10 knots. Southeast 15 knots developing in the morning. Sea slight. Easterly swell 1 metre.

Thursday 19 March

Southeast 15 knots, rising to 25 knots in the morning. Sea becoming rough. Easterly swell becoming moderate.

Friday 20 March

Southerly 20 knots, easing to southwest 10 knots early. Moderate easterly swell.

Saturday 21 March

Variable 10 knots. Moderate easterly swell easing.

Conway

Tuesday 17 March

Variable 10 knots. Northeast 15 knots developing early afternoon. Sea slight. Long period southwest swell 2 metres, easing.

Wednesday 18 March

Northerly 20 knots, becoming variable 10 knots early afternoon, before changing southwest 25 knots south of Kaikoura Peninsula late afternoon. Becoming southwest 15 knots but 30 knots in the north in the evening. Sea becoming rough. Southwest swell 1 metre easing for a time.

Thursday 19 March

Southerly 10 knots but southwest 25 knots north of Kaikoura Peninsula, becoming northeast 15 knots but variable 10 knots in the north in the morning. Rough sea in the north easing.

Friday 20 March

Easterly 10 knots. Southeast swell becoming moderate.

Saturday 21 March

Southeast 10 knots. Moderate easterly swell easing.

Cook

Tuesday 17 March

Variable 10 knots. Northerly 15 knots developing late evening. Sea slight. Long period southerly swell 1 metre easing.

Wednesday 18 March

Northerly 20 knots, becoming northwest 20 knots but northerly 30 knots south of Cape Terawhiti in the morning. Changing to variable 10 knots but southerly 25 knots in the south late evening. Sea becoming rough in the south.

Thursday 19 March

Southerly 25 knots, easing to 15 knots in the afternoon. Rough sea easing.

Friday 20 March

Southerly 10 knots, rising to 20 knots early.

Saturday 21 March

Southeast 15 knots.

Foveaux

Weather warning: Gale warning

Tuesday 17 March

Variable 10 knots. Northerly 20 knots developing late morning, rising to 30 knots in the evening. Sea becoming rough. Southwest swell 2 metres. Fair visibility in evening rain.

Wednesday 18 March

Northerly 35 knots, becoming westerly 25 knots but 35 knots about Foveaux strait early morning, then easing to southwest 20 knots everywhere late morning. Easing to variable 10 knots in the evening. Very rough sea easing. Southwest swell rising to 3 metres offshore. Poor visibility in morning rain.

Thursday 19 March

Northwest 10 knots. Moderate southwest swell.

Friday 20 March

Northwest 10 knots. Moderate southwest swell.

Saturday 21 March

Northwest 15 knots. Moderate southwest swell.

Grey

Tuesday 17 March

Variable 10 knots. Northerly 20 knots developing south of Abut Head in the afternoon. Sea becoming moderate in the south. Long period southwest swell 2 metres. Fair visibility in showers in the south, spreading north late.

Wednesday 18 March

Northwest 15 knots but 25 knots south of Abut Head. Turning southwest 20 knots in the south in the morning. Then becoming northeast 15 knots but southwest 10 knots in the south in the evening. Rough sea in the south easing. Long period southwest swell 2 metres. Poor visibility in rain, easing in the evening.

Thursday 19 March

Southwest 10 knots but northeast 15 knots north of Abut head, becoming variable 10 knots everywhere in the morning. Moderate westerly swell.

Friday 20 March

Southwest 10 knots. Moderate southwest swell.

Saturday 21 March

Variable 10 knots. Moderate southwest swell.

Kaipara

Tuesday 17 March

Southeast 15 knots. Sea slight. Very long period southwest swell 3 metres, easing. North of Cape Reinga: Easterly swell 1 metre.

Wednesday 18 March

Southeast 15 knots. Sea slight. Long period southwest swell 2 metres, easing. North of Cape Reinga: Easterly swell 1 metre.

Thursday 19 March

Southerly 15 knots.

Friday 20 March

Southerly 15 knots.

Saturday 21 March

Southerly 10 knots. Southwest swell becoming moderate.

Milford

Weather warning: Gale warning

Tuesday 17 March

Variable 10 knots. Northerly 25 knots developing in the morning, rising to 40 knots in the evening. Sea becoming very rough. Long period southwest swell 2 metres. Very poor visibility in heavy rain late evening.

Wednesday 18 March

Northerly 40 knots, becoming southwest 25 knots in the morning, easing to 15 knots in the evening. Very rough sea easing. Long period southwest swell 2 metres. Northwest swell 2 metres for a time. Very poor visibility in rain, easing early morning.

Thursday 19 March

Southwest 15 knots. Moderate southwest swell.

Friday 20 March

Southwest 20 knots. Moderate southwest swell.

Saturday 21 March

Southerly 15 knots, changing northerly 10 knots early. Moderate southwest swell.

Plenty

Tuesday 17 March

Variable 10 knots. Sea slight. Easterly swell 1 metre offshore, easing.

Wednesday 18 March

Variable 10 knots. Easterly 15 knots developing in the morning. Sea slight.

Thursday 19 March

Southeast 15 knots, rising to 25 knots in the morning. Sea becoming rough. Easterly swell becoming moderate.

Friday 20 March

Southerly 20 knots, easing to southwest 10 knots west of White Island later. Moderate easterly swell.

Saturday 21 March

Becoming southerly 10 knots everywhere early. Moderate easterly swell easing.

Portland

Tuesday 17 March

Variable 10 knots. Northeast 15 knots developing in the afternoon. Sea slight. Long period southwest swell 2 metres.

Wednesday 18 March

Northeast 15 knots, turning southeast 15 knots north of East Cape in the afternoon. Sea slight. Long period southwest swell 2 metres easing. Fair visibility in showers north of Mahia Peninsula.

Thursday 19 March

Northeast 10 knots but southeast 20 knots north of Mahia Peninsula. Becoming southeast 15 knots but 30 knots in the north in the morning. Sea becoming rough in the north. Heavy easterly swell, but moderate easterly swell south of East Cape.

Friday 20 March

Becoming southerly 25 knots but 35 knots north of Mahia Peninsula early, easing to 20 knots everywhere late. Sea becoming very rough in the north for a time. Heavy southeast swell, but moderate southeast swell south of East Cape.

Saturday 21 March

Southerly 20 knots, easing to 10 knots late. Heavy southeast swell, but moderate southeast swell south of East Cape, becoming moderate southeast swell everywhere.

Puysegur

Weather warning: Storm warning

Tuesday 17 March

Northerly 15 knots, rising to 25 knots west of Puysegur Point in the morning. Rising to northerly 25 knots but 35 knots in the west in the afternoon, then rising to northerly 35 knots but 60 knots in the west in the evening. Sea becoming very high in the west. Southwest swell 2 metre. Northwest swell 3 metres developing. Very poor visibility in heavy rain from late evening.

Wednesday 18 March

Northerly 35 knots but 60 knots west of Puysegur Point. Changing southwest 20 knots everywhere in the morning. Becoming southerly 15 knots but variable 10 knots south of West Cape in the evening. Very high sea in the west easing. Long period southwest swell rising to 3 metre. Northwest swell 3 metres dying out. Very poor visibility in rain, easing early morning.

Thursday 19 March

Variable 10 knots but southwest 15 knots north of West Cape. Becoming northwest 20 knots everywhere in the morning. Moderate southwest swell.

Friday 20 March

Westerly 15 knots. Moderate southwest swell.

Saturday 21 March

Northwest 15 knots, rising to 25 knots later. Sea becoming rough. Moderate westerly swell.

Raglan

Tuesday 17 March

Variable 10 knots. Sea slight. Long period southwest swell 2 metres.

Wednesday 18 March

Variable 10 knots, becoming southerly 15 knots in the afternoon. Sea slight. Long period southwest swell 2 metres, easing.

Thursday 19 March

Southerly 15 knots.

Friday 20 March

Southerly 20 knots, becoming southwest 10 knots but southeast 20 knots south of Kawhia Harbour late.

Saturday 21 March

Variable 10 knots but southeast 20 knots south of Kawhia Harbour.

Rangitata

Tuesday 17 March

Variable 10 knots. Northeast 20 knots developing in the afternoon. Sea becoming moderate. Long period southwest swell 2 metres offshore, easing.

Wednesday 18 March

Northerly 20 knots, becoming southerly 20 knots around midday, easing to 10 knots in the evening. Moderate sea easing. Southwest swell 2 metres offshore developing. Fair visibility in showers, clearing before evening.

Thursday 19 March

Variable 10 knots, becoming northeast 15 knots in the morning. Easing to variable 10 knots in the evening. Moderate southerly swell easing.

Friday 20 March

Southeast 10 knots.

Saturday 21 March

Easterly 15 knots. Easterly swell becoming moderate.

Stephens

Tuesday 17 March

Westerly 10 knots. Sea slight. West of Farewell Spit to Hawera: Long period southwest swell 2 metres. Elsewhere: Long period westerly swell 1 metres, easing.

Wednesday 18 March

Westerly 15 knots. Sea slight. West of Farewell Spit to Hawera: Long period southwest swell 2 metres, easing.

Thursday 19 March

Westerly 10 knots, turning southeast 20 knots in the morning.

Friday 20 March

Southeast 20 knots.

Saturday 21 March

Southeast 20 knots, easing to 10 knots later.

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