PART of Beaumaris was flooded after 7ft waves battered the town's sea defences.
Mayor and chief flood warden of Beaumaris councillor Jason Zalot said force four to eight winds blew up to three and a half feet of water flooded the green, the boatyard and Gallows Point. this morning (Friday, December 14).
He said: "Alan Jones of Anglesey Council's highways department called to warn me of the forecast at about 8pm last night.
"If it hadn't been for him this town would have gone under."
The waters receeded as the winds calmed shortly after lunch time, and cllr Zalot said the town's flood defences had proved themselves once again.
The B5109 from Beaumaris to Llangoed was closed, and traffic was diverted, and Beaumaris leisuire centre was opened as a rest centre should residents need to leave their homes.
Fire fighters were on standby at Beaumaris station, and police officers warned residents about the flooding.
No major damage to property has been reported.
An Anglesey Council spokesman said high tides were forecast for tonight (Friday, December 14) and tomorrow morning.
He added: "The Environment Agency is keeping an eye on situation.
"The flood warning has been removed Beaumaris for time being, but there is a flood alert in place for north Wales coast.."