Waterproof vs. Water-Resistant Watches

A question we always get.

Waterproof vs. Water-Resistant Watches: What’s the Real Difference?

When shopping for a watch, especially one you plan to wear daily or during outdoor adventures, you’ve likely come across the terms “waterproof” and “water-resistant.” While they may sound similar, there’s a world of difference between the two—and understanding that difference is essential to protect your timepiece (and your wallet).

1. “Waterproof” Watches: A Misleading Term

Let’s start with a little industry truth: no watch is truly waterproof.

The term “waterproof” implies that a watch is completely impervious to water under any condition. However, according to international standards (including those from the Federal Trade Commission and ISO), no manufacturer can guarantee absolute water protection forever—materials degrade, seals wear out, and pressure changes. That’s why most reputable brands avoid using “waterproof” and instead use the more accurate and testable term: water-resistant.

2. What “Water-Resistant” Really Means

Water-resistant refers to a watch's ability to withstand water to a certain extent and under specific conditions. But here's the catch: it’s not just about splashes or submersion—it’s also about pressure.

Water resistance is typically measured in meters (m), feet (ft), atmospheres (ATM), or bars:

  • 30m / 3 ATM / 3 Bar – Splash/rain resistant. Not safe for swimming.
  • 50m / 5 ATM / 5 Bar – Okay for light swimming, not for diving or snorkeling.
  • 100m / 10 ATM / 10 Bar – Safe for swimming and snorkeling.
  • 200m / 20 ATM / 20 Bar – Suitable for high-impact water sports and recreational diving.
  • 300 m+ – Professional-grade dive watches.

Important: These numbers don’t mean you can take the watch that deep. For instance, “50 meters” does not mean you can dive 50 meters underwater with it—it refers to the pressure the watch can handle in lab testing conditions.

3. Other Water Resistance Factors

  1. Gaskets and Seals: These are the rubber or silicone rings inside a watch that keep water out. Over time, they wear down and need replacing.
  2. Screw-Down Crowns: These help create a tighter seal, especially useful on dive watches.
  3. Case Design: The overall build—especially in higher-end Swiss watches—plays a critical role in keeping water out.

4. How to Protect Your Water-Resistant Watch

  • Don’t shower or bathe with it (soap and heat degrade seals).
  • Never operate pushers or crowns underwater, unless your watch is specifically designed for it.
  • Get it tested annually if you regularly expose it to water (especially for dive watches).
  • Avoid hot tubs and saunas—high heat + humidity = risk of seal failure.

Bottom Line

  1. “Waterproof” is a marketing myth—there’s no such thing.
  2. “Water-resistant” is the accurate term, and it always comes with limitations.
  3. Understanding the level of water resistance your watch offers helps you use it wisely and prolong its lifespan.

So, whether you’re taking a dip in the pool or diving into the deep blue sea, always check your watch’s water resistance rating—and don’t take “waterproof” at face value. Your watch (and your wrist) will thank you.

 

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