An easy test: sit in the cabin by the porta-potty and have someone run a hose over the boat. Look at all penetrations: bolts under the bow rail, cleats, any antennas or added equipment, etc.
If you see drops forming anywhere, that's a spot to repair. Tightening the bolts might help temporarily but would also seal moisture in the core; better to remove the offending fitting, clean out any wet core, fill with new resin and re-mount with good sealant.