Christchurch Council has confirmed that the cliff path from Highcliffe Castle will remain closed all year.
Retaining walls have weakened and the situation has become worse following dry weather which may have caused cliff falls elsewhere.
Design preparation and the work on site may mean that the path does not open until June next year.
Diversion Walkers on the Christchurch Coastal Path should leave the castle grounds by the front gate and turn right at the main road. Go right into Wharncliffe Road and after the road has turned left go right along a footpath leading to the cliff top.