Urenui Bay Motel owner Kerri Hulbert said the motel hadn't suffered any damage but the Urenui Service Station opposite them had.
The whole front of the building had suffered and parts of the roof had been pulled off, she said.
"We heard the winds though, they scared the jeepers out of us," Ms Hulbert said.
"It was just horrible."
Wild weather to hit North Island
It's a day for gumboots and raincoats for North Island residents as rain lashes the island, MetService says.
Thunderstorms and heavy rain were forecast for Auckland through the day, meteorologist John Law said.
The west of the North Island would also get a drenching, he said.
"So the likes of Mt Taranaki, we've got a severe weather warning through there, and also down to parts of Kapiti Coast and Wellington and even towards, the Bay of Plenty this afternoon we're going to find some wet weather."
There was a chance of flooding in Waikato, Waitomo, parts of Auckland and the Bay of Plenty ranges, Mr Law said.
"Ahead of this system as well is quite blustery with northerly winds."
The weather should clear tomorrow, he said.
"But we are going to find it's a pretty unsettled week - we've got more areas of low pressure down towards the south and they're going to carry on pushing wet weather on towards the western coast of the South Island."
Thunderstorms with heavy rain and winds gusting up to 70km/h could be in store for Auckland this morning, MetService duty forecaster David Miller said.
A severe thunderstorm watch was issued for Auckland from 8.17pm on Monday until 12pm today.
Lightning was currently striking seas west of Auckland but the weather was set to come in, Mr Miller said.
"There's definitely that risk of lightning," he said.
"It's mainly a morning thing though. With any thunderstorms there's always a risk of damaging winds that's where the issue lies."
The winds could get up to 70km but would ease in the afternoon, he said.
The rain would also ease to isolated showers probably before 2pm, Mr Miller said.
The New Zealand Transport Agency (NZTA) urged drivers to take extra care on roads.
Strong wind and heavy rain were expected to make roads more treacherous.
"If the weather is looking particularly rough, we urge people to avoid or delay non-essential travel. It's much safer to stay put with a hot drink until it eases up," an NZTA spokesman said.
