Apple Watch and Bluetooth: What Happens If You Turn It Off
Last updated July 26, 2026
You do not have to keep Bluetooth on for your Apple Watch. The watch falls back to a WiFi network it shares with your iPhone, and a cellular Apple Watch can also use its own cellular data.
So why keep Bluetooth on for Apple Watch at all? Because Bluetooth is the most power efficient link between the two devices, and leaving it on saves battery on both the watch and the phone.
Turn it off and your watch keeps working. It just reaches your phone a slower, hungrier way, and both batteries drain faster.
How does an Apple Watch connect to your iPhone?
Your Apple Watch does not rely on a single connection. It picks the cheapest one available and switches on its own.
Apple lays out the order on its Bluetooth, WiFi, and cellular support page. It works like this:
- Bluetooth first, whenever your iPhone is nearby (about 33 feet, or 10 meters). This uses the least power.
- WiFi second, if your iPhone has connected to that network before and the network is compatible.
- Cellular third, on GPS plus Cellular models, when both Bluetooth and WiFi are out of reach.
The WiFi step is the part people miss. Your watch can hop onto a WiFi network your phone already knows, even when the phone is in another room. That is how texts and notifications still land on your wrist with Bluetooth off.
One catch: your watch will not join public networks that need a login, subscription, or profile.
What happens when you turn Bluetooth off?
The short version: your watch keeps working, and it uses more battery to do it.
With Bluetooth off, your watch drops to WiFi (or cellular on a cellular model). Calls, texts, and notifications keep coming as long as one of those is available.
A few things do change. Features that expect your phone within Bluetooth range get less reliable, such as using your watch to unlock your Mac or iPhone, and quick handoff between the two. Downloads and syncing also slow down.
Here is how the connection types stack up:
| Connection | What still works | Battery cost |
|---|---|---|
| Bluetooth (phone nearby) | Calls, texts, alerts, unlock, handoff, syncing | Lowest |
| Shared WiFi network | Calls, texts, alerts, app data | More than Bluetooth |
| Cellular (cellular models) | Calls, texts, data, apps away from phone | More than Bluetooth |
| Airplane Mode | Offline apps, workouts, downloaded music | Lowest |
If you own a cellular model and want to know when the extra data plan actually earns its keep, this breakdown of whether cellular is worth paying for uses the same logic that applies to a watch.
How to turn Bluetooth off on your iPhone
Most people tap the Bluetooth button in iPhone Control Center and assume the watch is cut off. It is not. That button leaves your Apple Watch and Continuity features connected on purpose.
To fully turn Bluetooth off on your iPhone, use Settings instead:
- Open the Settings app on your iPhone. The screen should show your name at the top and a list of options.
- Tap Bluetooth. The screen should show the Bluetooth switch and your paired devices.
- Tap the green switch so it turns gray. Bluetooth is now off, and your watch drops its Bluetooth link to the phone, then falls back to WiFi or cellular.
How to turn Bluetooth off on the Apple Watch itself
The Apple Watch Control Center does not include a standalone Bluetooth button by default. It has WiFi, Cellular, and Airplane Mode, but no separate Bluetooth toggle you can confirm on screen. Confirm the layout on your own watch, since Apple can move controls between watchOS versions.
On the watch, Settings then Bluetooth is for pairing accessories like headphones and speakers, not a master switch. You turn the watch’s own WiFi and Bluetooth on or off through Airplane Mode in the Settings app. To reach it:
- Press the Digital Crown, then open the Settings app (the gray gear icon).
- Tap Airplane Mode. The screen should show separate switches for WiFi and Bluetooth.
- Turn the Bluetooth switch off. Your watch stops using Bluetooth and falls back to WiFi or cellular. By default Airplane Mode leaves Bluetooth on, so you set this switch yourself.
Is turning off Bluetooth the same as Airplane Mode?
No, and the difference surprises people. By default, Airplane Mode does the opposite of what you might expect: it turns off WiFi and cellular and keeps Bluetooth on.
You can change that. Apple explains it on the Airplane Mode support page: open the Settings app on your watch, tap Airplane Mode, then switch WiFi and Bluetooth on or off to set your own defaults.
So if your goal is a quiet, low power watch, Airplane Mode does that in one tap.
Does leaving Bluetooth on drain your battery?
Leaving Bluetooth on is the battery friendly choice, not the costly one.
Apple states plainly that the Apple Watch is most efficient when it has a Bluetooth connection to its paired iPhone, and that Bluetooth conserves power. Keep the two within range and both devices sip less power. As a general rule, WiFi and cellular both draw more power than Bluetooth.
This matters overnight too. If you use your watch for sleep tracking through the night, keeping Bluetooth on with the phone on the nightstand keeps the drain low until your morning charge.
The one time turning Bluetooth off saves power is when your phone is far away for hours and the watch keeps hunting for it. In that case, Airplane Mode is the cleaner fix.
When should you actually turn Bluetooth off?
For daily use, leave it on. Turn it off (or use Airplane Mode) in three cases: on a flight when the crew asks, during a phone free stretch when you want maximum battery, and when you are troubleshooting a stuck connection.
A cellular watch changes the calculation, because it can stand alone. If you like to leave your phone behind during a workout, cellular plus WiFi keeps you reachable without Bluetooth at all. Deciding how much of that freedom you need is part of picking which Apple Watch fits you best.
Frequently asked questions
Will my Apple Watch still get texts with Bluetooth off?
Yes, as long as your watch is on a WiFi network your iPhone knows, or has its own cellular plan. Texts, calls, and notifications still come through. They just travel over WiFi or cellular instead of Bluetooth.
Does turning off Bluetooth in iPhone Control Center disconnect my watch?
No. Tapping the Bluetooth button in iPhone Control Center keeps your Apple Watch and Continuity features connected. To fully turn Bluetooth off, open the Settings app on your iPhone and switch Bluetooth off there.
Does Bluetooth drain the Apple Watch battery faster?
No, the reverse is true. The watch is most power efficient over Bluetooth. WiFi and cellular both use more, so leaving Bluetooth on helps your battery last longer.
Can a WiFi only Apple Watch work without Bluetooth?
Yes, on a known WiFi network. A GPS model with no cellular relies on Bluetooth and WiFi, so it stays useful at home or work but goes quiet once it leaves every saved network.
What does Airplane Mode do to Bluetooth on the watch?
By default, Airplane Mode leaves Bluetooth on while turning off WiFi and cellular. You can change that in the Settings app under Airplane Mode, where you set whether WiFi and Bluetooth stay on.
Sources
Apple Support: About Bluetooth, WiFi, and cellular on your Apple Watch