Why do my goggles fog so much more at night?

Night air temperatures are significantly colder than daytime, creating a larger temperature differential between your warm face and the goggle lens. This differential drives condensation—warm, moist air from your face hits the cold inner lens surface and fogs instantly. Night goggles address this with premium anti-fog coatings, enhanced ventilation, and dual-lens thermal barriers, but some fogging may still occur during high exertion.