Offshore breakwaters could buy Britain’s eroding beaches ‘precious decades’, researchers say

Britain’s sandy beaches are vanishing faster as storms intensify, but researchers say a network of offshore breakwaters could buy coastlines precious decades by slowing erosion. Throughout history, Britain’s coastlines have been shaped by tides, waves and winds, but severe storms have made new ways of protecting homes and other buildings increasingly urgent.

One affected area is Thorpeness in Suffolk, where officials are developing a long-term plan with new measures after part of the coastline was severely damaged last autumn and winter. As reported by the East Suffolk Council, emergency measures have already been taken, with rock protection installed in the most vulnerable parts of the coast.

An offshore breakwater is a barrier, often built from boulders or concrete, positioned away from the shore, acting as a barrier that absorbs wave energy before it reaches the coast. This helps reduce erosion by slowing sediment loss, and can eventually lead to an accumulation of sediment behind the breakwater that helps maintain the beach as further protection.

Studies in the journal Ocean Engineering have examined how offshore structures affect wave patterns, sediment transport and shoreline behaviour, though their effectiveness depends on local conditions such as tidal currents and geology. According to the UK’s Environment Agency, defences should be designed based on specific places since there is no universal solution.