Watch a report by ITV News Anglia's Stuart Leithes.
From Boston in Lincolnshire to Bedford, dozens of narrowboats are heading to the town for its annual river festival via The Wash.
They've been navigating the open sea from Boston as part of a 160 mile trip in time for the 40th Bedford River Festival which starts on 13th July.
Narrowboats are designed for inland waterways and are not used to heavy seas.
Members of the Cotswolds Canals Cruising Club left Boston for Wisbech on the first part of their journey and will be crossing across Cambridgeshire and along to Bedford.