Tentsmuir Beach car park and the adjacent picnic area will be closed for three weeks from Monday.
The closure, which will include weekends, will allow foresters to safely remove unstable trees from the site after recent storms.
Robin Lofthouse, for Forest Enterprise Scotland, said: “We appreciate that a lot of people will be disappointed at the closure but we need to do this for long-term visitor safety.
“Many of the trees at the car park have shallow, poorly developed roots growing in a weak sandy soil.
“The size and weight of these trees is now so large that they have reached a point where they are unstable and could easily be blown over in the next big storm.
“Before that happens, we’re going to remove the trees and take the opportunity to re-model the car park layout.
“I know our visitors share our views that these trees are part of the character of Tentsmuir.
“However, in knowing that these problems exist, we simply have to act.
“As work is going on, there will be no vehicle access to the car park at all but Tentsmuir forest will still be accessible on foot, bicycle or horse and we’ll make sure to maintain access to the toilets, the beach and trails in the wider area.”
Visitors are also being advised not to park cars on or near the ‘Z’ bends before the electronic barrier, or in the residential/stables junction area at Kinshaldy, to ensure access is maintained for timber haulage.
Heavy machinery will also be used to move fine branch wood on to the dunes on the seaward side of the car park area to protect against sand erosion.