I got my new to me 1992 Hunter 30 in July. This is my first winter of ownership. When I bought the boat, the bilge had some water in it, but with the ice box and shower draining there, I didn't worry about it. (And my surveyor found no evidence of leaks anywhere.) Since my purchase, we haven't used the shower, and we've only had melted ice in the ice box a couple of times. So the bilge has been virtually dry. The front portion (where the some of the keel bolts are visible) has been completely dry. The middle portion, where the bilge pump is, has only had the small amount that the bilge pump wouldn't remove.I winterized the boat about a month ago, and I returned to it this weekend for the first time since then. I was very surprised to find water in both the front portion of the bilge and the middle portion. I stayed on the boat for several hours and never heard the bilge pump kick on, so I don't think I have major water coming in. This afternoon, I fully sponged out both sections. I will go back tomorrow and check the status. Today I also checked the keel bolts - all felt tight.So my question is where could the water be coming from? I am in fresh water, so I can't test for salt. I don't see any other evidence of leaks anywhere - like water leaking in through port holes or toe rail and running down. The key distinction between now and summer is that the water temp here has dropped about 30 degrees. I would assume that such a change could cause things to flex or contract?? But I still can't think of what could be leaking. Any ideas on how to track this down?