All crew members confirmed safely off ship. Maritime and Coastguard Agency to inspect damage at dawn.
A cargo ship ran aground in rough seas with several crew members on board. It happened at Llandulas near Colwyn Bay on Tuesday evening.
The A55 remains closed between between the Promenade and Abergele Road in Old Colwyn to allow sea rescue helicopters to land.
A spokesman said: "Two RNLI all-weather lifeboats launched at 8:30pm this evening after reports that a commercial vessel had ran ashore against a rock on the breakwater at Llanddulais, North Wales."
ITV reporter Ian Lang at the scene of the rescue said the ship is right up against the sea defences where it is being battered by very high seas.
He added: “It looks structurally sound from what we can see, and certainly not like it’s being broken up.”
He also described the air sea rescue which was carried out to lift some of the crew to safety.
“The helicopter crew carried out an amazing rescue.
“The waves seemed to be flying up almost to the aircraft itself when they were lifting people off the deck.
It was difficult to understand how they could have done this so successfully because of the high winds and dreadful conditions.”
Five crew members were winched to safety by helicopter but the rescue had to be interrupted. The winchman from the helicopter was left stranded on the ship with two remaining crew members. They were all successfully rescued at 0100 on Wednesday morning.
The efforts were hampered by a northerly wind blowing directly on to shore at Severe Gale Force 9.
The environmental authorities have been notified about a risk of pollution.