Comparison · Fitness watches · Desk research
Apple Watch SE (2nd generation) vs Apple Watch SE 3
Quick Answer
Apple Watch SE (2nd generation, Support 111853) is a 40mm or 44mm aluminum watch with the S8 SiP, a 2-core Neural Engine, 32GB, an LTPO OLED that is not Always-On, 1000 nits, 324×394 / 368×448, L1 GPS, 50m, Crash Detection, and Fall Detection. Apple lists up to 18 hours and about 80% charge in 1.5 hours. ECG, Blood Oxygen, and temperature sensing are not on that sheet. SE 3 (Support 125094, year introduced 2025) keeps 40/44mm aluminum, L1 GPS, 50m.
The verdict
Apple Watch SE (2nd generation) or Apple Watch SE 3 — quote the two manufacturer sheets.
Why: SE-family hop. Both are 40/44mm aluminum value Watches with L1 GPS, 50m swimproof, Crash/Fall Detection, and no ECG (Apple’s ECG footnote excludes SE models). SE 2 (Support 111853, 2022) is S8, 32GB, LTPO OLED that is not Always-On, 1000 nits, 18-hour table, about 80% in 1.5 hours. It is not named on Apple’s watchOS 27 list. SE 3 (Support 125094, 2025) is S10, 64GB, Always-On LTPO OLED at 1,000 nits, temperature sensor, 18-hour / 32-hour Low Power table, about 80% in 45 minutes. SE 3 is named on the watchOS 27 list.
Buy Apple Watch SE (2nd generation) if
You already wear SE (2nd generation), you do not need Always-On, temperature sensing, or watchOS 27, and Crash/Fall Detection plus 50m still cover what you do.
Buy Apple Watch SE 3 if
You want the current SE: Always-On, a temperature sensor, 64GB, and a Watch Apple names on the watchOS 27 list.
Spec comparison
OEM rows only. SE 2 from Apple Support 111853. SE 3 from Apple Support 125094.
| Spec | SE (2nd generation) | SE 3 |
|---|---|---|
| Year introduced | 2022 | 2025 |
| Case size(s) | 40mm and 44mm aluminum | 40mm and 44mm aluminum |
| Display | LTPO OLED (Always-On not listed); 324×394 / 368×448; 326 ppi; up to 1000 nits | Always-On OLED + LTPO; same pixel grid; 326 ppi; up to 1,000 nits; 2 nits minimum |
| Front crystal | Ion-X | Ion-X (Apple 4x crack-resistance footnote) |
| Chip / storage | S8; 2-core Neural Engine; 32GB | S10; 4-core Neural Engine; 64GB |
| Battery — normal use | Up to 18 hours (August 2022) | Up to 18 hours (July–August 2025) |
| Battery — Low Power | Not listed on 111853 | Up to 32 hours |
| Fast charge (OEM) | ~80% in about 1.5 hours | ~80% in about 45 minutes; 15 min ≈ 8 hours |
| Weight (44mm GPS) | 32.9g | 32.9g GPS; 33.0g GPS+Cellular |
| GNSS | L1 GPS | L1 GPS |
| Water | 50m | 50m |
| ECG | Not listed; SE excluded | Not applicable (Apple compare + ECG footnote) |
| Temperature | Not listed | Temperature sensor listed |
| Safety | Emergency SOS, Crash Detection, Fall Detection | Emergency SOS, Crash Detection, Fall Detection |
| watchOS 27 (Apple list) | Not named | Named (SE 3) |
Who each watch is for
SE 2 is the 2022 value Watch. Crash/Fall Detection is already there. Always-On, temperature, and watchOS 27 are not.
SE 3 is the current SE. Buy it when those three rows matter.
Frequently asked questions
Does SE 2 get watchOS 27?
Apple’s Series 12 Newsroom (9 September 2026) names Series 9 or later, SE 3, and Ultra 2 or later. SE 3 is named. SE (2nd generation) is not.
Does either SE have ECG?
Apple’s ECG footnote excludes Apple Watch SE models. Support 111853 and 125094 do not list an ECG app.
Is SE 3 Always-On?
Yes on Support 125094. Support 111853 does not list Always-On on SE 2.