Apple Watch is designed to work best in ambient temperatures between 32° to 95° F (0° and 35° C), and should be stored between ambient temperatures of -4° and 113° F (-20° and 45° C).
For example, Apple Watch shouldn’t sit unattended in direct sun for long periods, undergo dramatic changes in temperature or humidity, or be left in a car on hot days. Storing and using your device outside of the recommended temperature range could shorten its battery life or cause other damage.
Learn about temperature management for Apple Watch
If necessary, Apple Watch will regulate its internal temperature. There are several things you might notice if this happens:
- Charging times might increase, or charging might stop
- The display might dim
- A temperature warning screen might appear
- Data transfers could pause or slow down
- Apps might close
If your Apple Watch experiences above-normal temperatures:
- If you're wearing your device, turn it off and remove it from your wrist.
If your Apple Watch is in the process of charging, remove it from its charger.
- Move your Apple Watch to a cooler place and let it cool down before putting it back on or continuing to charge it.
Handle your Apple Watch and its accessories safely
Apple Watch, its power adapter, and Apple Watch Magnetic Charging Cable follow applicable surface-temperature standards and limits. Even within these limits, sustained contact with warm surfaces for long periods of time might cause discomfort or injury.
Here are some safety tips:
- Be aware that Apple Watch, its power adapter, and Apple Watch Magnetic Charging Cable warm up when plugged in to a power source.
- If plugged in, Apple Watch, Apple Watch Magnetic Charging Cables, and power adapters shouldn't be in prolonged contact with skin.
- While charging, Apple Watch, its power adapter, and Apple Watch Magnetic Charging Cable should stay in a well-ventilated area. For example, if these devices are charging or plugged in to power sources, they shouldn't be covered.
- Take off your Apple Watch if it becomes uncomfortably hot. Take special care if you have a physical condition that affects your ability to sense heat against the body.
Apple Watch, its adapter, and Apple Watch Magnetic Charging Cable meet the standard for Safety of Information Technology Equipment, IEC 60950-1:2005+A1:2009+A2:2013. Many countries and regions have adopted this safety standard. For example, it’s referred to as:
- UL 60950-1 in the United States
- CSA 60950-01 in Canada
- EN 60950- in Europe
- AS/NZS 60950:1 in Australia and New Zealand