Punctures and leaks on inflatable boats are rare, but risky and unpredictable. It is wise to inspect your boat on a regular basis, otherwise you may find yourself on a sinking ship.
To check if your dinghy has a leak, you can simply leave it inflated for a period of time. A dinghy in good condition will remain tightly inflated. But if it is losing air pressure and has become soft over time, it might either be caused by cold temperature or by a puncture or tear that is slowly leaking air.
If you suspect that your dinghy has a leak, below is a complete guide on how to find leaks and how to correctly use boat sealants in repairing your SIB.