At least three businesses on Paihia's waterfront that were doused with seawater during the weekend's storm will be closed for days to allow for a clean-up.
Firefighters were forced to close a stretch of State Highway 11 that runs past central Paihia on Saturday morning as high swells pushed seawater on to the road and into adjacent cafes and restaurants.
Paihia fire chief Shane Schrafft said the businesses would be shut for a few days to enable their premises to be cleaned.
"There was very little rain but the swells out at sea meant tides were pushed across the road so we've had close that road and divert traffic flow," he said.
Mr Schrafft said business owners of properties contaminated by sea water were aware of the weather conditions and in future, they could be better prepared.