Wellington declares a state of emergency and orders south coast evacuations as 10 metre swells bear down

Wellington has declared a local state of emergency and ordered hundreds of people off the capital’s south coast as some of the largest swells in years close in on the lower North Island. Mayor Andrew Little signed the declaration for the city’s Southern and Eastern wards on Monday evening, and a mandatory evacuation took effect from 9am on Tuesday for residents in Ōwhiro Bay, Island Bay, Houghton Bay and Breaker Bay.

The order followed a heavy swell warning from MetService for the Wellington and South Wairarapa coasts, with combined waves of eight to ten metres forecast to roll in from the Southern Ocean. Civil Defence issued the evacuation notice about 6.30pm on Monday and urged people to move out while it was still safe to do so, warning that conditions could make leaving far more dangerous once the sea built up overnight. Lyall Bay was left out of the order because its shape gives it some shelter from the worst of the southerly fetch.

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Forecasters described the event as unusual both for its size and for how fast the water would rise. The most dangerous windows were expected for the two hours either side of high tide at about 11.19am on Tuesday and again near 11.42pm, when waves on the exposed south coast could reach eight to nine metres and push seawater well past the normal shoreline. Offshore, swells were predicted to climb toward ten and a half metres, dwarfing a 2020 event that brought waves of around five and a half metres to the same beaches.

Wellington Civil Defence Controller Phil Becker said the scale of the forecast left little room for doubt about the call to move people out. He said the size of the forecast waves meant there was a real risk to the safety of residents. The council set up an emergency assistance centre at the Wellington South Baptist Church at 284 The Parade, which opened from 9pm on Monday for anyone who did not have somewhere else to stay.

Authorities were just as firm with the wider public, who in past swell events have driven to the coast to watch the surf. Civil Defence spokesperson Dan Neely said the public was urged to avoid Wellington’s south coast roads, as well as the coastal roads around Wairarapa. MetService meteorologist Lewis Ferris put it more bluntly, telling people not to take the dog for a walk and not to go just to see the large waves roll in. Sightseers crowding the foreshore not only put themselves in danger but also get in the way of crews trying to manage the response.

The threat was not confined to the capital. MetService warned that the swell would batter much of the country’s eastern edge, with the Wairarapa coast from Turakirae Head to Mataikona facing combined waves of nine to ten metres by late Tuesday morning. Forecasters also flagged hazardous conditions for Banks Peninsula, the southern Kaikōura coast, the Catlins south of Dunedin and the Chatham Islands, with eastern offshore waters tipped to exceed seven and a half metres. MetService meteorologist Devlin Lynden said the warning used the term rapidly rising to underline how quickly the sea would build in the affected areas.

Cook Strait sailings were among the first casualties. Interislander cancelled all of its Tuesday crossings, while Bluebridge pulled sailings from Monday night through to early Wednesday, stranding freight and passengers on both sides of the strait until the swell eased. The cancellations are a reminder of how exposed the country’s main inter-island link is to weather that funnels straight up the strait from the south.

For Island Bay in particular, the swell warning landed on a community already having a rough few weeks. The suburb was hit by a major sewage spill earlier in June after debris blocked a pipe during heavy rain, pushing raw wastewater onto streets and into the sea. Wellington Water later said the overflow had been traced back to two pieces of timber lodged in the network. With saltwater now forecast to surge over the same low lying streets, residents have had little chance to draw breath between one coastal hazard and the next.

The declaration gives Civil Defence extra powers to direct people, restrict access to roads and call on resources during the response. A local state of emergency lasts seven days unless it is extended or lifted earlier, and it can be renewed if conditions warrant. Officials stressed that the priority through Tuesday was keeping people away from the water rather than any clean up, which would only begin once the sea dropped back and crews could safely assess any damage to homes, roads and seawalls along the coast.

Residents who left were asked to take essential medicines, important documents and enough supplies for a few days, and to check on elderly or less mobile neighbours before heading out. Anyone in the evacuation zone who needed help to move, or who had nowhere to go, was directed to the assistance centre or told to call Wellington Emergency Management for support. The council said it would update the public as the swell peaked and as it became clear whether the second high tide late on Tuesday brought a fresh round of inundation.

The event is a stark reminder that even a sheltered looking harbour city sits on an open and energetic coast, and that a big Southern Ocean swell can turn familiar beaches into genuine danger in a matter of hours. For now, the message from emergency managers is simple. Stay back, stay safe, and let the sea do its worst without an audience.

Were you affected by the south coast evacuation, or have you lived through a big Wellington swell before? Share your experience in the comments below.

This article was written by AI, briefed to report the facts, hopefully without some of the bias people bring to the job 🙂