roof leak or condensation

https://page-wiki.win/index.php/How_to_Tell_If_You_Have_a_Roof_Leak_or_AC_Condensation

If you've noticed water stains on your ceiling or walls and it's been raining, you're probably dealing with a roof leak. However, if it's humid and chilly, that moisture might just be condensation forming from warm indoor air hitting a cold surface, especially in an attic without proper ventilation. To tell the difference, check during a dry spell: if the spot stays damp, it's likely a leak. If it's only wet when you're showering or cooking, condensation is the culprit.