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Apple

Watch SE 3 40mm

  • Apple Watch SE 3 40mm - Starlight Aluminum Case Starlight Sport Band S/M-slide-0

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Full price: $299.99 + tax

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Get the Apple Watch SE 3rd Gen 40mm for $99 with a new watch line

Recurring promotional savings: $200.99

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Apple Watch SE 3

Three Apple Watch SE 3 devices floating next to each other

Walk it. Talk it.
Track it. Love it.

Walk it. Talk it.
Track it. Love it.

Walk it. Talk it.
Track it. Love it.

  • Track the quality of your zzz’s with sleep score. And get sleep apnea notifications. Refer to legal disclaimers.

    Two Apple Watch SE 3 devices with Midnight aluminum cases showing sleep score and a possible sleep apnea alert on screens

  • Wrist temperature sensing enables richer health insights in the Vitals app Refer to legal disclaimers. and retrospective ovulation estimates. Refer to legal disclaimers.

    two Apple Watch SE 3 devices with Starlight aluminum cases showing the Vitals app on screens

  • The Always-On display lets you read the time and more without raising your wrist.

    A person's arm grabbing a breakfast food, Apple Watch SE 3 on wrist, Starlight aluminum case, always-on display, portrait of a person on watch face, starlight Sport Band

  • Motivation? Count on it. Apple Watch SE 3 encourages you to close your Activity rings daily.

    Red, green, and blue Activity rings, representing move, exercise, and stand goals in the Activity app

  • Ready. Set. Whoa. It’s so easy to track all your favorite workouts.

    Workout icons, animated stick people running, walking, swimming, using wheelchair, hiking, cycling, lunging, dancing, stretching, and doing yoga

  • Add a cellular plan to text, call, stream, and download on the go. Now available with 5G speeds. Refer to legal disclaimers.

    Three Apple Watch SE 3 devices next to each other, one showing the Apple Music app, one showing an incoming phone call, and one showing an iMessage exchange

  • Enjoy all-day, 18-hour battery life. Refer to legal disclaimers. Then recharge up to 2x as quickly with fast charging. Refer to legal disclaimers.

  • Safety features like Crash Detection and Fall Detection can get you help in an emergency. Refer to legal disclaimers.

    SOS

  • Set up Apple Watch For Your Kids, even if they don’t have their own iPhone. Refer to legal disclaimers.

    Cartoon illustration of kid's wrist wearing Apple Watch SE 3 with the Activity app open on the screen Cartoon illustration of kid's wrist wearing Apple Watch SE 3 with the Messages app open on the screen

Compare

Which Apple Watch is right for you?

 
Apple Watch Series 11
Apple Watch SE 3
Apple Watch Ultra 3
Apple Watch Series 11
Apple Watch SE 3
Apple Watch Ultra 3
 
Apple Watch SE 2
Apple Watch Series 10
Apple Watch Ultra 2
Apple Watch Series 9
Apple Watch Ultra
Apple Watch Series 8
Apple Watch Series 7
Apple Watch Series 6
Apple Watch SE
Apple Watch Series 5
Apple Watch Series 4
Apple Watch Series 3
Apple Watch Series 2
Apple Watch Series 1
Choose models to compare.
Images
Aluminum

Aluminum

Rose Gold, Silver, Space Gray, Jet Black

Aluminum

Midnight, Starlight

Aluminum not applicable

Aluminum

Midnight, Starlight, Silver

Aluminum

Jet Black, Rose Gold, Silver

Aluminum not applicable

Aluminum

Midnight, Starlight, Silver, Pink, PRODUCT(RED)

Aluminum not applicable

Aluminum

Midnight, Starlight, Silver, PRODUCT(RED)

Aluminum

Midnight, Starlight, Green, Blue, PRODUCT(RED)

Aluminum

Space Gray, Silver, Gold, Blue, PRODUCT(RED)

Aluminum

Space Gray, Silver, Gold

Aluminum

Space Gray, Silver, Gold

Aluminum

Space Gray, Silver, Gold

Aluminum

Space Gray, Silver

Aluminum

Space Gray, Silver, Rose Gold, Gold

Aluminum

Space Gray, Silver, Rose Gold, Gold

Titanium

Titanium

Natural, Gold, Slate

Titanium not applicable

Titanium

Natural, Black

Titanium not applicable

Titanium

Slate, Gold, Natural

Titanium

Black, Natural

Titanium not applicable

Titanium

Natural

Titanium not applicable

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Stainless steel

Stainless steel not applicable

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Stainless steel not applicable

Stainless steel

Graphite, Silver, Gold

Stainless steel not applicable

Stainless steel

Graphite, Silver, Gold

Stainless steel

Graphite, Silver, Gold

Stainless steel

Graphite, Silver, Gold

Stainless steel not applicable

Stainless steel

Space Black, Silver, Gold

Stainless steel

Space Black, Silver, Gold

Stainless steel not applicable

Stainless steel

Black, Silver

Stainless steel not applicable

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Case Size
Display
Heart Health
Sleep
Vitals
Women's Health
Safety
Water resistance
Connectivity
Chip
Power and Battery Life

Key features

326 pixels

Always-On Retina display with OLED and LTPO

Talk Time

18 Hours Standby Time

Other features

  • Health essentials¹˒⁴˒⁵˒⁶
  • Great battery Life ²
  • Always on Display
  • A Great Fitness Partner⁸
  • Stay Connected
  • Safety Features ⁹
  • Apple watch for your kids¹⁰
Apple Watch SE 3 is packed with health, fitness, connectivity, and safety essentials—all for a great value. Track your sleep score. Get richer health insights in the Vitals app.1 Stay active with a wide range of workouts. Save time with fast charging.2 See your info at a glance with the Always-On display. And still get all-day, 18-hour battery life.3

Need help with choosing which Apple Watch is right for you? Apple Watch comparison chart to help you decide based on features and options for each smartwatch side-by-side.

Get our best Apple Deals on the newest iPhones, newest iPads and Apple Watches Also, be sure to explore the stunning new Apple Watch SE 3 44mm, Apple Watch Series 11 42mm , Apple Watch Series 11 46mm and Apple Watch Ultra 3 , available on the nation’s largest and fastest nationwide 5G network.

Apple Watch SE 3 40mm Quick Facts
  • When was the Apple Watch SE 3 40mm released? The Apple Watch SE 3 40mm was released on September 19th, 2025.
  • What colors are available for the Apple Watch SE 3 40mm? The Apple Watch SE 3 40mm is available in 2 colors: Starlight Aluminum, and Midnight Aluminum, and can be customized with colorful watch bands.
*Color and memory size options may vary in availability online or in store. 1The Vitals app is for wellness purposes only and not for medical use.
2Fast charging is compatible with Apple Watch Series 7 and later, any Apple Watch Ultra model, and Apple Watch SE 3.
3Battery life varies by use and configuration. See apple.com/watch/battery for more information.
4The temperature sensing feature is not intended for medical use. Temperature sensing is available only on Apple Watch Series 8 and later and all Apple Watch Ultra models.
5Sleep apnea notifications are available on Apple Watch Series 9 and later, Ultra 2 and later, and SE 3. The feature is intended to detect signs of moderate to severe sleep apnea for people 18 years old or older without a diagnosis of sleep apnea.
6Irregular rhythm notification requires the latest versions of watchOS and iOS. It is not intended for use by people under 22 years old or those who have been previously diagnosed with atrial fibrillation (AFib).
7Testing conducted by Apple in July and August 2025 using preproduction Apple Watch SE 3 (GPS + Cellular) and Apple Watch SE 2 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, Apple Watch Magnetic Fast Charger to USB-C Cable (Model A2515), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.
8Requires an Apple Intelligence–enabled iPhone nearby and Bluetooth headphones with device and Siri language set to English. Apple Intelligence is available in beta. Some features may not be available in all regions or languages. For feature and language availability and system requirements, see support.apple.com/en-us/121115.
9Emergency SOS requires a cellular connection or Wi-Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that cellular service is available. Some cellular networks may not accept an emergency callfrom your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular cellular network, if isn’t set up for cellular service, or if the cellular network does not support emergency calling over IMS. See support.apple.com/108374 and apple.com/watch/cellular for more information.
10Not all features will be available if the Apple Watch is set up through Apple Watch For Your Kids. Check support.apple.com/en-us/109036 for details. Wireless service plan required for cellular service. Check apple.com/watch/cellular for participating wireless carriers and eligibility.
11Wireless service plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/watch/cellular for participating wireless carriers and eligibility. See support.apple.com/HT207578 for additional setup instructions.
12Data plan required. 5G is available in select markets and through select carriers. Speeds vary based on site conditions and carrier. For details on 5G support, contact your carrier and see apple.com/watch/cellular.

What’s in the box

  • Apple Watch SE 3 40mm
  • Band
  • Apple Watch Magnetic Fast Charger to USB-C Cable (1m)

Additional spec details

Battery Description
Built-in rechargeable lithium-ion battery
Ports
Magnetic Charger to USB-C Cable
Connectivity
Wi-Fi 802.11b/g/n 2.4GHz, 5G and LTE,Support for 2.4GHz Wi-Fi networks, Bluetooth 5.3, L1 GPS, NFC
Processor
S10 chip with 64‑bit dual core processor
Operating System
watchOS
Maximum Expandable Memory
0 GB
Wireless Network Technology Generations
4G LTE, 5G
Supported Email Platforms
Apple Mail, POP3, IMAP4, SMTP, Microsoft® Exchange, AOL, AIM, Yahoo!® Mail, GMail
WEA Capable
true
Mobile Hotspot Capable
true
Frequency
LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 40, 41, 66, 71; 5G: n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n66, n71
Weight
0.93 Ounces
Length
0.42 Inches
Height
1.57 Inches
Width
1.49 Inches

If you select to pay monthly and cancel wireless service, the remaining balance on the device becomes due. For well-qualified buyers, 0% APR. Qualifying service required.