Coastal Forecasts and Warnings
Warnings
Gale warning in effect for Stephens, Castlepoint, Portland and Grey
The Situation
Cyclone Tam is expected to remain slow-moving to the west of the country during Friday and Saturday, with associated troughs affecting much of New Zealand. Strong northeasterly winds and periods of heavy rain are expected across parts of the upper North Island and northwestern South Island.For most of the outlook period Cyclone Tam is expected to gradually weaken while remaining to the west of the country. A moist northeasterly flow associated with the system will cover much of New Zealand, while southeasterlies are forecast to develop over the southern South Island on Sunday. During Monday and Tuesday, Cyclone Tam is expected to shift northwards, while remaining weak to the west of the North Island. On Wednesday, the remains of Cyclone Tam move over, and to the north of the North Island, and southerly winds spread north over New Zealand.
Issued: 10:16am Friday 18 Apr 2025
Coastal Forecasts
Plenty
Warning: Nil
Friday: Northeast 30 knots. Sea rough. Northeast swell 4 metres. Northwest swell 1 metre developing. Poor visibility in rain. Thunderstorms possible east of Moutohora Island.
Saturday: Northeast 25 knots, easing to 15 knots in the morning. Rough sea easing. Northeast swell 4 metres, easing. Northwest swell 1 metre. Poor visibility in rain. Afternoon thunderstorms possible.
Sunday: Northerly 20 knots, easing to 10 knots in the morning. Moderate northeast swell.
Monday: Northeast 10 knots. Moderate northeast swell.
Tuesday: Variable 10 knots, becoming westerly 15 knots early. Moderate northeast swell.
Issued: 4:28pm Friday 18 Apr 2025
Colville
Warning: Nil
Friday: Northeast 25 knots. Sea rough. Northeast swell 4 metres, easing. Northwest swell 1 metre developing. Fair visibility in showers.
Saturday: Northeast 20 knots. Sea moderate. Northeast swell 3 metres, easing. Northwest swell 1 metre. Poor visibility in morning rain, with possible thunderstorms.
Sunday: Northerly 20 knots, easing to 10 knots in the afternoon. Moderate northeast swell.
Monday: Variable 10 knots. Moderate northeast swell.
Tuesday: Westerly 10 knots. Moderate northeast swell.
Issued: 4:28pm Friday 18 Apr 2025
Brett
Warning: Nil
Friday: Northerly 25 knots. Sea rough. Northeast swell 4 metres easing. Northwest swell 1 metres developing. Poor visibility in showers, heavy at times. Thunderstorms possible.
Saturday: Northerly 20 knots. Sea moderate. Northeast swell 3 metres, easing. Northwest swell 1 metre. Poor visibility in morning rain, with possible thunderstorms.
Sunday: Northwest 20 knots, easing to 10 knots in the morning. Moderate northeast swell.
Monday: Westerly 10 knots. Moderate northeast swell.
Tuesday: Southwest 10 knots, rising to westerly 20 knots early. Moderate northeast swell.
Issued: 4:28pm Friday 18 Apr 2025
Kaipara
Warning: Nil
Friday: Northeast 25 knots. Sea rough. North of Cape Reinga: Northerly swell 4 metres. South of Cape Reinga: long period southwest swell 2 metres, easing. Northwest swell 2 metres developing. Poor visibility in showers, heavy at times. Possible thunderstorms.
Saturday: Northerly rising to 30 knots in the morning, easing to 20 knots in the afternoon. Rough sea easing. North of Cape Reinga: Northerly swell 4 metres, easing. South of Cape Reinga: long period southwest swell 1 metre. Northwest swell rising to 3 metres. Poor visibility in rain, with possible morning thunderstorms.
Sunday: Northwest 15 knots. Heavy westerly swell.
Monday: Westerly 15 knots. Heavy westerly swell easing.
Tuesday: Westerly 10 knots, rising to 20 knots early. Moderate southwest swell easing.
Issued: 4:28pm Friday 18 Apr 2025
Raglan
Warning: Nil
Friday: Northeast 30 knots. Sea rough. Long period southwest swell 2 metres, easing. Northwest swell 2 metres developing. Poor visibility in scattered rain.
Saturday: Northerly 30 knots, easing to 20 knots in the evening. Rough sea easing. Long period southwest swell 1 metres. Northwest swell rising to 3 metres. Poor visibility in periods of rain. Afternoon thunderstorms possible.
Sunday: Northerly 20 knots. Moderate westerly swell.
Monday: Northeast 20 knots, easing to 10 knots early. Moderate westerly swell.
Tuesday: Variable 10 knots, becoming southerly 15 knots later. Moderate southwest swell easing.
Issued: 4:28pm Friday 18 Apr 2025
Stephens
Warning: Gale warning
Friday: Northeast 20 knots but 35 knots west of Farewell Spit to Hawera. Sea very rough in the west. West of Farewell Spit to Hawera: Northerly swell 3 metres developing. Long period southwest swell 2 metres, easing. Throughout: Northwest swell 2 metres developing. Poor visibility in showers. Possible thunderstorms west of Farewell Spit.
Saturday: Northeast 25 knots but 35 knots west of Farewell Spit to Hawera, becoming northerly 25 knots everywhere in the evening. Very rough sea in the west, easing. West of Farewell Spit to Hawera: Northwest swell 3 metres. Long period southwest swell 1 metre. Throughout: Northwest swell rising to 3 metres. Poor visibility in periods of rain. Afternoon thunderstorms possible in the west.
Sunday: Northerly 20 knots, becoming southeast 15 knots but northeast 20 knots west of Farewell Spit to Hawera in the evening. Moderate northwest swell.
Monday: Becoming southeast 35 knots but easterly 25 knots west of Farewell Spit to Hawera early. Sea becoming very rough. Moderate westerly swell dying out.
Tuesday: Southeast 30 knots but 20 knots west of Farewell Spit to Hawera. Sea rough.
Issued: 4:28pm Friday 18 Apr 2025
Cook
Warning: Nil
Friday: Southerly 20 knots, changing northerly 15 knots this evening. Moderate sea easing. Long period southerly swell 1 metre.
Saturday: Northerly 20 knots. Sea moderate. Long period southerly swell 1 metre, easing. Fair visibility in evening showers.
Sunday: Northerly 20 knots, changing southerly 25 knots in the afternoon. Sea becoming rough.
Monday: Southerly 25 knots, rising to 35 knots early. Sea becoming very rough. Southerly swell becoming moderate.
Tuesday: Southerly 30 knots. Sea rough. Moderate southerly swell easing.
Issued: 4:28pm Friday 18 Apr 2025
Castlepoint
Warning: Gale warning
Friday: Northeast 35 knots. Sea very rough. Northeast swell rising to 3 metres. Long period southwest swell 1 metre. Poor visibility in periods of rain.
Saturday: Northeast 35 knots, easing to northeast 25 knots in the morning. Very rough sea easing. Northeast swell 3 metres, easing. Long period southwest swell 1 metre.
Sunday: Northerly 20 knots, becoming variable 10 knots but northeast 20 knots north of Cape Palliser in the afternoon. Moderate northeast swell.
Monday: Becoming southwest 20 knots everywhere early. Moderate easterly swell.
Tuesday: Southerly 20 knots. Moderate southeast swell.
Issued: 4:28pm Friday 18 Apr 2025
Portland
Warning: Gale warning
Friday: Northeast 35 knots. Sea very rough. Northeast swell rising to 4 metres. Long period southwest swell 2 metres, easing. Poor visibility in periods of rain.
Saturday: Northerly 35 knots, easing to 25 knots in the morning. Very rough sea easing. Northeast swell 4 metres, easing. Long period southwest swell 1 metre. Poor visibility in rain, clearing morning.
Sunday: Northerly 25 knots, easing to 15 knots in the evening. Rough sea easing. Moderate northeast swell.
Monday: Northerly 15 knots, easing to variable 10 knots early. Moderate northeast swell.
Tuesday: Southerly 10 knots, rising to southwest 20 knots early, easing to 10 knots north of East Cape late. Moderate northeast swell.
Issued: 4:28pm Friday 18 Apr 2025
Abel
Warning: Nil
Friday: Northeast 25 knots. Sea rough. Northerly swell 1 metre developing. Poor visibility in rain, heavy at times. Possible evening thunderstorms north of Separation Point.
Saturday: Northeast 20 knots. Sea moderate. Northerly swell rising to 2 metres. Poor visibility in rain, heavy at times. Afternoon thunderstorms possible.
Sunday: Northerly 20 knots, turning easterly 15 knots in the afternoon. Moderate northerly swell easing.
Monday: Southeast 20 knots, easing to southerly 10 knots south of Separation Point early.
Tuesday: Southeast 10 knots but 20 knots north of Separation Point.
Issued: 4:28pm Friday 18 Apr 2025
Grey
Warning: Gale warning
Friday: Northeast 25 knots but 35 knots north of Grey River, becoming 35 knots everywhere this evening. Sea becoming very rough everywhere. Northerly swell rising to 4 metres. Long period southwest swell 2 metres, easing. Fair visibility in scattered rain.
Saturday: Northeast 35 knots, easing to 25 knots south of Grey River, then easing to 25 knots but 15 knots in the south in the evening. Very rough sea easing. Northerly swell 4 metres, easing. Long period southwest swell 1 metres. Poor visibility in rain, heavy from evening.
Sunday: Northeast 25 knots but 15 knots south of Grey River, turning southeast 20 knots in the south in the afternoon. Sea rough. Heavy northerly swell easing.
Monday: Becoming southeast 20 knots everywhere early, easing to variable 10 knots later. Rough sea in the north easing. Moderate northwest swell dying out. Moderate southwest swell developing.
Tuesday: Southerly 10 knots, rising to southwest 20 knots early. Easing to southerly 10 knots inshore late. Moderate southwest swell.
Issued: 4:28pm Friday 18 Apr 2025
Milford
Warning: Nil
Friday: Southeast 15 knots, rising to northeast 30 knots late evening. Sea becoming rough. Northerly swell rising to 4 metres. Long period southwest swell 2 metres, easing. Fair visibility in scattered rain.
Saturday: Easterly 15 knots but 25 knots offshore. Rising to northeast 30 knots everywhere in the morning, easing to 20 knots in the afternoon. Sea becoming rough for a time. Northerly swell 4 metres, easing. Long period southwest swell 1 metre. Poor visibility in rain, possibly heavy from afternoon.
Sunday: Easterly 15 knots, becoming southerly 25 knots in the morning. Easing to southwest 15 knots inshore in the afternoon. Sea becoming rough. Moderate northwest swell dying out. Moderate southwest swell developing.
Monday: Becoming southerly 20 knots everywhere early, easing to variable 10 knots in the morning. Rough sea offshore easing. Moderate southwest swell.
Tuesday: Southwest 10 knots, rising to 30 knots early. Sea becoming rough. Moderate southwest swell.
Issued: 4:28pm Friday 18 Apr 2025
Puysegur
Warning: Nil
Friday: Southeast 20 knots. Sea moderate. Long period southwest swell 3 metres. Northerly swell 2 metres developing west of West Cape. Fair visibility in scattered rain.
Saturday: Southeast 20 knots, becoming southeast 15 knots but northeast 20 knots north of West Cape in the morning, then northeast 15 knots everywhere in the afternoon. The changing to southwest 20 early evening. Sea moderate at times. Long period southwest swell 3 metres. Northerly swell 2 metres west of West Cape. Poor visibility in periods of rain, possibly heavy.
Sunday: Southwest 20 knots, becoming southwest 20 knots but southerly 30 knots north of West Cape in the morning. Sea becoming rough in the north. Moderate southwest swell.
Monday: Becoming southerly 25 knots everywhere early, becoming easterly 20 knots but southeast 30 knots in the west in the morning. Sea rough. Moderate southwest swell.
Tuesday: Becoming southerly 25 knots everywhere early. Sea rough. Moderate southwest swell.
Issued: 4:28pm Friday 18 Apr 2025
Foveaux
Warning: Nil
Friday: Southeast 15 knots but northeast 25 knots east of Slope Point to Shelter Point. Easing to variable 10 knots in the west late evening. Rough sea in the east. Northeast swell rising to 3 metres offshore. Long period southwest swell 2 metres, easing. Possible fog.
Saturday: Variable 10 knots but northeast 25 knots east of Slope Point to Shelter Point, easing to northerly 15 knots in the east in the afternoon, then becoming southwest 10 knots everywhere late evening. Sea becoming rough for a time. Northeast swell 3 metres offshore, easing. Long period southwest swell 1 metre. Possible fog. Fair visibility in evening rain.
Sunday: Southwest 15 knots. Moderate southeast swell.
Monday: Southerly 15 knots, turning easterly 20 knots early. Moderate southerly swell.
Tuesday: Northeast 15 knots, becoming westerly 15 knots early. Rising to southwest 25 knots later. Sea becoming rough. Moderate southwest swell.
Issued: 4:28pm Friday 18 Apr 2025
Chalmers
Warning: Nil
Friday: Northeast 25 knots. Sea rough. Northeast swell rising to 3 metres. Long period southwest swell 2 metres, easing. Possible fog.
Saturday: Northeast 25 knots, easing to northerly 15 knots in the evening. Rough sea easing. Northeast swell 3 metres. Long period southwest swell 1 metre. Possible fog.
Sunday: Northerly 15 knots, turning southwest 15 knots early morning. Moderate easterly swell.
Monday: Southerly 15 knots, turning easterly 15 knots early. Moderate southeast swell.
Tuesday: Easterly 15 knots, easing to variable 10 knots early. Becoming southwest 25 knots later. Sea becoming rough. Moderate southerly swell.
Issued: 4:28pm Friday 18 Apr 2025
Rangitata
Warning: Nil
Friday: Northeast 25 knots. Sea rough. Northeast swell rising to 3 metres. Long period southwest swell 2 metres, easing. Possible fog.
Saturday: Northeast 25 knots. Sea rough. Northeast swell 3 metres offshore. Long period southwest swell 1 metre. Possible fog.
Sunday: Northeast 20 knots, easing to variable 10 knots inshore early morning, then becoming southerly 20 knots everywhere late morning. Moderate easterly swell.
Monday: Southerly 15 knots. Moderate southeast swell.
Tuesday: Southeast 10 knots, turning southwest 15 knots early, rising to 25 knots offshore late. Sea becoming rough offshore. Moderate southeast swell easing.
Issued: 4:28pm Friday 18 Apr 2025
Conway
Warning: Nil
Friday: Northeast 25 knots. Sea rough. Northeast swell rising to 3 metres offshore. Long period southwest swell 2 metres, easing. Possible fog.
Saturday: Northeast rising to 30 knots in the morning. Sea rough. Northeast swell 3 metres offshore. Long period southwest swell 1 metre. Possible fog.
Sunday: Northerly 25 knots, changing southwest 20 knots in the afternoon. Rough sea easing. Moderate northeast swell.
Monday: Southwest 20 knots, becoming southwest 25 knots but 35 knots north of Kaikoura Peninsula early. Sea becoming very rough in the north. Moderate easterly swell.
Tuesday: Easing to southwest 20 knots everywhere early, easing to southerly 10 knots in the morning. Rising to southwest 20 knots late. Very rough sea in the north easing. Moderate southeast swell easing.
Issued: 4:28pm Friday 18 Apr 2025
Chatham Islands
Warning: Nil
Friday: Northeast 15 knots. Sea slight. Long period southwest swell 3 metres, easing. Northeast swell 2 metres developing.
Saturday: Northeast 20 knots. Sea moderate. Long period southwest 1 metre. Northeast swell rising to 3 metres.
Sunday: Northerly 20 knots. Rough sea easing. Moderate northerly swell.
Monday: Northerly 20 knots. Moderate northwest swell.
Tuesday: Northeast 20 knots, easing to northerly 10 knots late. Moderate northerly swell.
Issued: 4:28pm Friday 18 Apr 2025
Auckland VHF Warning
Issued: 4:47pm Friday 18 Apr 2025
Northeast rising to 25 knots gusting 25 knots this evening, easing below advisory criteria Saturday afternoon.
STRONG WIND ADVISORY A58 FOR HAURAKI GULF:
Northeast rising to 25 knots gusting 35 knots this evening, easing below advisory criteria Saturday afternoon.
STRONG WIND ADVISORY A58 FOR WAITEMATA HARBOUR:
Northeast rising to 25 knots gusting 35 knots this evening, easing below advisory criteria late Saturday afternoon.
This warning cancels and replaces WARNING A57