When buying a smartwatch, water resistance is a crucial feature—especially for swimmers, athletes, or those who want durability. But terms like IP68, 5ATM, and WR50 can be confusing. This guide explains all waterproof ratings, their limits, and which watches are truly swim-proof.
1. Understanding Water Resistance Ratings
| Rating | Protection Level | Suitable For | Example Watches |
|---|---|---|---|
| IP68 | Dustproof & can survive 1.5m underwater for 30 mins | Rain, splashes, accidental drops | Samsung Galaxy Watch 6, Xiaomi Mi Band |
| 3ATM (30m) | Light water exposure (rain, handwash) | Not for swimming | Basic fitness trackers |
| 5ATM (50m) | Swim-proof (pool, shallow water) | Swimming, snorkeling | Apple Watch, Garmin Venu |
| 10ATM (100m) | Strong water resistance | Swimming, diving, water sports | Garmin Descent, Casio G-Shock |
| ISO 22810 | Officially certified for swimming | Reliable swim tracking | Fitbit Versa, Huawei Watch GT |
| MIL-STD-810H | Military-grade (shock, dust, water) | Extreme sports | Amazfit T-Rex Pro |
2. What Do These Ratings Really Mean?
A. IP Ratings (Ingress Protection) A. IP Ratings (Ingress Protection) 1. IP65 This number achieves an immune level towards dust as well as water (rain), practically keeping the light work in a dust- and water-proof environment.
IP67→ Dust that can survive in water for 30 minutes at a depth of 1 meter.
IP68 → Improved water resistance ( 1.5m for 30 minutes).
❌Not for Swimming- (Accident (Splash only).
B. ATM Ratings (Atmosphere Pressure) 1.
3ATM (30m) → Washing hands, rain, no swimming.
5ATM(50m)→Can only wash your hands, please don’t wear it to swim and bathe.
10ATM (100m) → Appropriate for snorkeling & swimming.
C. ISO 22810 & Dive Certifications
ISO 22810 → For precision swimming data.
Dive Watches (or 200m+) → Dive ready according to ISO standards (Garmin Descent).
Is it safe to swim with a waterproof smartwatch?
Safe for: ✅ Yes if 5ATM or above
Pool swimming
❌ No, if it’s only IP68 or 3ATM – Avoid:
- High-pressure water (jets, diving)
- Hot water (sauna, steam rooms)
- Saltwater (unless rinsed after)
4. Best Waterproof Smartwatches (2024)
| Smartwatch | Rating | Best For |
|---|---|---|
| Apple Watch Series 9 | 5ATM + IP6X | Swimming, daily use |
| Garmin Venu 3 | 5ATM | Swim tracking, fitness |
| Samsung Galaxy Watch 6 | IP68 + 5ATM | Casual swimming |
| Amazfit T-Rex 2 | 10ATM | Diving, extreme sports |
| Fitbit Versa 4 | 5ATM | Pool workouts |
5. How can the waterproofing be preserved?
- Rinse with fresh water after use in salt water to prevent corrosion.
- Avoid hot water as it is a slow process of sealing weakening.
- Check if there is any damage: Water resistance is low when scratch is present.
- Do not push the keys as this might lead to water getting inside.
Conclusion: What Kind of Rating Is Needed?
Regular Use (Splash, Rain) → IP68 / 3ATM
Bathing & Swimming → 5ATM+
Diving & Water Sports → 10ATM+
Looking for a suitable option? Tell me your budget and how you plan to use it! 🌊⌚