Condoms are rated for storage at 15‑25 °C; prolonged exposure to higher temperatures weakens the latex and raises the chance of breakage. Experts note that temperatures above 30 °C, especially in direct sunlight, can make the material brittle and less elastic.
The most hazardous locations include parked cars on hot days, sun‑lit windows, glove compartments, wallets, back pockets, beach bags left in the sun and even overly humid bathrooms. Rapid shifts from very cold to hot environments also damage the material.
Recommended storage is a cool, dry, dark place such as a bedside drawer or wardrobe, away from direct sunlight. While refrigeration or freezing is not advised, condoms can be kept in luggage during travel as aircraft cargo holds rarely reach damaging temperatures. Gemma Nice of Condoms.uk and medical nurse Sarah Mulindwa emphasized checking for signs of damage and replacing any condom that has been exposed to extreme heat.