A campervan driver became stranded when he attempted to cross a causeway at high tide.
The man had to be rescued when the van became submerged on the Holy Island road, which is underwater twice a day.
He managed to escape and reach a refuge box. It is thought he did not realise it was unsafe to cross because he spoke little English.
Ian Clayton, from Seahouses RNLI, said: “We suspect that language problems may have contributed to this incident.”
He added: “Fortunately he was safely brought ashore and did not require medical assistance.”
The rescue happened just after 15:00 GMT on Saturday. Safe crossing times to the island – also known as Lindisfarne – on Saturday were 08:20 until 13:50 and it was unsafe to cross until 20:50.
Northumberland County Council installed warning signs at either end of the mile-long causeway in 2012 in a bid to cut the number of strandings.
They display a message to check the tide tables followed by the safe crossing times.