Coastal Forecasts and Warnings
Warnings
Gale warning in effect for Stephens, Cook, Castlepoint and Portland
The Situation
Today, the cool and showery southerlies gradually ease across the country as a ridge of high pressure spreads onto the South Island. Tomorrow the ridge continues to move north to span the country.A ridge spans the country from Thursday through to Sunday. However, weak troughs may bring showers to eastern and northern New Zealand as well as the west of the South Island. On Sunday, the ridge tracks east away from the country as northerly flow start to build about Fiordland.
Issued: 8:58pm Tuesday 19 Aug 2025
Coastal Forecasts
Plenty
Warning: Nil
Wednesday: Southerly 25 knots. Sea rough. Northerly swell 1 metre, easing.
Thursday: Southerly 20 knots.
Friday: Southeast 15 knots, becoming easterly 15 knots but southeast 25 knots east of White Island later. Sea becoming rough in the east.
Saturday: Becoming easterly 20 knots everywhere early. Rough sea in the east easing.
Issued: 10:51pm Tuesday 19 Aug 2025
Colville
Warning: Nil
Wednesday: Southerly 30 knots, easing to 20 knots in the morning. Rough sea easing. Northerly swell 1 metre, easing. Fair visibility in morning showers.
Thursday: Southeast 20 knots. Moderate southeast swell easing.
Friday: Southeast 15 knots.
Saturday: Easterly 20 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Brett
Warning: Nil
Wednesday: Southerly 30 knots, easing to 20 knots early afternoon. Rough sea easing. Northerly swell 1 metre, easing. Fair visibility in morning showers.
Thursday: Southeast 20 knots.
Friday: Southeast 15 knots.
Saturday: Easterly 15 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Kaipara
Warning: Nil
Wednesday: Southerly 30 knots, easing to 20 knots in the evening. Rough sea easing. Long period southwest swell 4 metres, easing. Fair visibility in morning showers.
Thursday: Southeast 20 knots. Moderate southwest swell.
Friday: Southeast 15 knots. Moderate southwest swell.
Saturday: Easterly 10 knots. Moderate southwest swell easing.
Issued: 10:51pm Tuesday 19 Aug 2025
Raglan
Warning: Nil
Wednesday: Southerly 25 knots. Sea rough. Long period southwest swell 4 metres, easing. Fair visibility in early showers.
Thursday: Southerly 20 knots. Moderate southwest swell.
Friday: Southeast 20 knots, easing to 10 knots early. Moderate southwest swell.
Saturday: Easterly 15 knots. Moderate southwest swell easing.
Issued: 10:51pm Tuesday 19 Aug 2025
Stephens
Warning: Gale warning
Wednesday: Southerly 25 knots but 35 knots east of Stephens Island to Hawera. Easing to southeast 25 knots everywhere in the morning, then rising to back to southerly 35 knots in the east for a time in the afternoon and evening. Very rough sea easing for a time. West of Farewell Spit to Hawera: Long period southwest swell 4 metres, easing. Southeast swell 2 metres developing. East of Farewell Spit to Hawera: Long period westerly swell 2 metres, easing. Southeast swell rising to 3 metres for a time. Poor visibility in showers in the east.
Thursday: Southerly 25 knots but easterly 10 knots west of Farewell Spit to Hawera. Becoming southeast 20 knots everywhere in the morning. Rough sea easing. Heavy southwest swell easing in the west.
Friday: Southeast 20 knots. Moderate southwest swell easing.
Saturday: Easterly 15 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Cook
Warning: Gale warning
Wednesday: Southerly 35 knots. Sea very rough. Southerly swell 4 metres, easing. Fair visibility in showers.
Thursday: Southerly 30 knots, easing to 20 knots in the evening. Rough sea easing. Moderate southerly swell.
Friday: Southerly 20 knots, easing to southeast 10 knots late. Moderate southerly swell easing.
Saturday: Variable 10 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Castlepoint
Warning: Gale warning
Wednesday: Southerly 35 knots, easing to 25 knots north of Cape Palliser in the morning, then elsewhere late evening. Very rough sea easing in the north. Southerly swell 4 metres, easing.
Thursday: Southerly 25 knots, easing to 15 knots in the evening. Rough sea easing. Moderate southerly swell.
Friday: Southerly 15 knots, easing to variable 10 knots late. Moderate southerly swell.
Saturday: Variable 10 knots, becoming northerly 15 knots later. Moderate southerly swell easing.
Issued: 10:51pm Tuesday 19 Aug 2025
Portland
Warning: Gale warning
Wednesday: Southerly 35 knots, easing to 25 knots in the evening. Very rough sea easing. Southerly swell rising to 5 metres offshore for a time. Northerly swell 1 metre, easing. Poor visibility in showers.
Thursday: Southerly 30 knots. Sea rough. Moderate southerly swell.
Friday: Southerly 20 knots, easing to southeast 10 knots late. Moderate southerly swell.
Saturday: Southeast 10 knots. Moderate southerly swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Abel
Warning: Nil
Wednesday: Southerly 15 knots, easing to variable 10 knots in the morning. Sea slight.
Thursday: Variable 10 knots, southeast 15 knots developing in the evening.
Friday: Southeast 10 knots.
Saturday: Variable 10 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Grey
Warning: Nil
Wednesday: Southerly 15 knots, easing to variable 10 knots in the morning. Sea slight. Long period southwest swell 3 metres.
Thursday: Variable 10 knots. Moderate southwest swell.
Friday: Variable 10 knots. Moderate southwest swell.
Saturday: Northeast 10 knots. Moderate southwest swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Milford
Warning: Nil
Wednesday: Southerly 25 knots, easing to southwest 15 knots inshore in the afternoon. Becoming southeast 10 knots but southerly 20 knots offshore in the evening. Rough sea easing. Long period southwest swell 3 metres.
Thursday: Southerly 10 knots but 20 knots offshore. Becoming southerly 10 knots everywhere in the evening. Moderate southwest swell.
Friday: Variable 10 knots. Moderate southwest swell.
Saturday: Northerly 10 knots. Moderate southwest swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Puysegur
Warning: Nil
Wednesday: Southwest 25 knots, easing to 15 knots early morning. Rough sea easing. Long period southwest swell 4 metres.
Thursday: Westerly 15 knots but southerly 20 knots north of West Cape. Easing to southwest 10 knots everywhere in the evening. Heavy southwest swell easing.
Friday: Southwest 10 knots, turning northwest 15 knots later. Moderate southwest swell.
Saturday: Northwest 15 knots, rising to 25 knots early. Easing to northerly 15 knots north of West Cape late. Sea becoming rough everywhere for a time. Moderate westerly swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Foveaux
Warning: Nil
Wednesday: Southwest 25 knots, easing to 15 knots in the morning. Rough sea easing. Long period southwest swell 4 metres offshore.
Thursday: Westerly 15 knots. Heavy southwest swell easing.
Friday: Westerly 15 knots. Moderate southwest swell.
Saturday: Northwest 10 knots. Moderate southwest swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Chalmers
Warning: Nil
Wednesday: Southwest 25 knots, easing to 15 knots in the afternoon. Rough sea easing. Long period southwest swell 3 metres offshore.
Thursday: Southwest 15 knots. Moderate southwest swell.
Friday: Westerly 15 knots, easing to variable 10 knots later. Moderate southwest swell.
Saturday: Northerly 10 knots. Moderate southwest swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Rangitata
Warning: Nil
Wednesday: Southwest 20 knots, easing to 10 knots in the evening. Moderate sea easing. Long period southwest swell 3 metres offshore.
Thursday: Southwest 10 knots. Moderate southerly swell.
Friday: Westerly 10 knots. Moderate southerly swell easing.
Saturday: Variable 10 knots.
Issued: 10:51pm Tuesday 19 Aug 2025
Conway
Warning: Nil
Wednesday: Southerly 30 knots, easing to 20 knots south of Kaikoura Peninsula in the afternoon. Rough sea easing in the south. Southerly swell 4 metres, easing. Poor visibility in showers.
Thursday: Southwest 20 knots. Moderate southerly swell.
Friday: Southwest 15 knots, easing to variable 10 knots late. Moderate southerly swell.
Saturday: Variable 10 knots, becoming northeast 15 knots early. Moderate southerly swell easing.
Issued: 10:51pm Tuesday 19 Aug 2025
Chatham Islands
Warning: Nil
Wednesday: Southwest 25 knots. Sea rough. Long period southwest swell 3 metres. Fair visibility in showers.
Thursday: Southerly 20 knots. Southwest swell becoming heavy.
Friday: Southwest 20 knots. Heavy southwest swell easing.
Saturday: Southwest 15 knots. Moderate southwest swell.
Issued: 10:51pm Tuesday 19 Aug 2025
Auckland VHF Warning
Issued: 10:51pm Tuesday 19 Aug 2025
Southwest 30 knots gusting 40 knots, easing to 25 knots gusting 35 knots in the morning, then easing below advisory criteria Wednesday afternoon.
STRONG WIND ADVISORY A51 FOR HAURAKI GULF:
Southwest 30 knots gusting 40 knots, easing to 25 knots gusting 35 knots in the morning, then easing below advisory criteria Wednesday afternoon.
STRONG WIND ADVISORY A51 FOR WAITEMATA HARBOUR:
Southwest 25 knots gusting 35 knots, easing below advisory criteria Wednesday afternoon.
STRONG WIND ADVISORY A51 FOR MANUKAU HARBOUR:
Southwest 30 knots gusting 40 knots, easing to 25 knots gusting 35 knots in the morning, then easing below advisory criteria Wednesday afternoon.
This warning cancels and replaces WARNING A50