Steve, You don't say if you have a MKll. I am in the water all year hear in Anacortes Washington. My cabin doors get tight just due to additional moisture in the winter. Never not able to close them however. Look to see if the cabin walls are spreading apart at the motor enclosure. With a MKll you can see the gaps on both sides of the top engine hatch getting wider than normal. I would bet it is how the boat is blocked and it will come out when back in the water.
Jack
Jack