The £3.1m Pier to Pier Way, which is jointly funded by North Somerset Council, National Highways, Department for Transport via Sustrans and the European Agricultural Fund for Rural Development, is set to open in the summer.
In order to upgrade the path, the public footway which leads from Lower Strode Road to the Old Clevedon Seawall, adjacent to Dowlais Farm in Clevedon, was closed on Monday (7 February) and will remain closed until Friday 1 April.
Cllr Mike Solomon, North Somerset Council's executive member for neighbourhoods and community services, said: "Upgrading the path surface will allow better access for cyclists and disabled users as part of the eagerly-awaited Weston to Clevedon cycle route.
"We appreciate that this is a popular recreational area and the closure will be an inconvenience for some. We would urge people to be patient as the upgrading of the path is an exciting step forward in delivering this important route that has been wanted for so long."
The works will also include maintenance to the seawall.
A later phase of the project will see the resurfacing of the path adjacent to Marshals Field in Clevedon.