A Are marine boat fenders enough to protect my vessel in rough conditions? Marine boat fenders are helpful for temporary protection, but they often fall short in rough or windy conditions. They can shift, deflate, roll away from critical impact points, an even end up sitting on top of the dock due to wave action. For high-risk docking environments or frequent use, we recommend supplementing or replacing hanging fenders with heavy duty dock mounted bumpers for consistent, all-season protection.