If you own a watch, you’ve likely seen it advertised as “waterproof.” But what does that really mean? Can you swim, dive, or even shower with your watch without damaging it? The truth about waterproof watches might surprise you. Understanding the difference between water-resistant and waterproof, and how to care for your watch, is essential for ensuring it continues to function as intended.
This guide will walk you through everything you need to know about waterproof watches, from technical definitions to practical tips.
What Does “Waterproof” Actually Mean?
The term “waterproof” can be misleading. In reality, no watch is entirely immune to water under all conditions. The International Organization for Standardization (ISO) sets the standards for watch water resistance, and according to them, a watch must withstand submersion at least 100 metres deep to earn the “waterproof” label. However, most watches are better described as water-resistant, with varying degrees of protection against water exposure.
Water Resistance Ratings Explained
Watches typically come with a specific water resistance rating, often expressed in metres (e.g., 30m, 50m, 100m). Here’s what those numbers really mean:
- 30m (3 ATM) – Suitable for daily use, including hand washing and exposure to rain. Not safe for swimming or full submersion.
- 50m (5 ATM) – Can be used for light swimming in shallow water, but not recommended for diving or snorkelling.
- 100m (10 ATM) – Safe for swimming, snorkelling, and water sports, but not intended for serious diving.
- 200m (20 ATM) – Ideal for most water activities, including diving, but limitations still exist at deeper levels.
- 300m+ – Professional-grade diving watches are built for deep-sea diving, offering exceptional water resistance.
It’s worth noting that these ratings don’t mean you can dive to that exact depth. They’re often based on lab tests under controlled conditions, rather than real-world activities that involve temperature changes, movement, and saltwater.
Waterproof vs. Water-Resistant: What’s the Difference?
Many people use the terms “waterproof” and “water-resistant” interchangeably, but they aren’t the same. Waterproof watches, technically, don’t exist. Instead, watches are water-resistant to varying degrees. Here’s a clearer breakdown:
- Waterproof: A watch that cannot be penetrated by water at any level. This is a rare claim and often not accurate in real-world use.
- Water-resistant: A watch that can resist water under specific conditions. This could include exposure to rain, splashes, or brief submersion, depending on the rating.
Even if a watch is advertised as waterproof, its ability to keep water out diminishes over time, particularly if seals (gaskets) degrade or are not serviced regularly.
⌚️ More information on Waterproof vs Water-Resistant Watches can be found here.
How Can You Tell If Your Watch Is Waterproof?
Not sure if your watch can withstand water exposure? There are a few ways to assess its durability:
1. Check the Water Resistance Rating
Look at the back of your watch or consult the manufacturer’s instructions. The water resistance rating is your first clue as to how much exposure your watch can handle. Watches rated at 30m, for example, should never be fully submerged.
2. Inspect the Gaskets
Gaskets, the rubber or silicone seals that keep water out, are essential to water resistance. Over time, these seals can deteriorate due to wear and tear or exposure to extreme temperatures. If they’re cracked, damaged, or missing, water can easily seep in. If your watch is several years old, it’s wise to have a professional inspect the gaskets during a routine service.
3. Test Your Watch in Controlled Conditions
The most definitive way to check water resistance is to submerge your watch in water under controlled conditions. Fill a bowl or sink with water and gently place the watch inside, observing it for any sign of malfunction or condensation behind the crystal. If you notice any fogging, it’s time to have the watch serviced.
4. Take It for Professional Testing
For the most accurate results, have your watch tested by a certified technician. Many jewellers or watch repair shops offer water resistance testing services. They can determine if the gaskets need replacement or if any other components are compromised.
Common Myths About Waterproof Watches
Myth 1: All Waterproof Watches Are Suitable for Diving
As mentioned earlier, even high-end waterproof watches may not be designed for deep-sea diving. Always check the specific depth rating and use a dedicated dive watch if you plan to go beyond shallow waters.
Myth 2: You Can Wear Your Watch in the Shower or Hot Tub
Exposure to hot water, such as in a shower or hot tub, can damage the seals in your watch. The heat causes the materials to expand, allowing water to get in. Even if your watch is water-resistant, it’s better to remove it before jumping into a hot bath or sauna.
Myth 3: The Age of Your Watch Doesn’t Matter
Water resistance diminishes over time. Even if your watch was rated for 100m when you first bought it, years of exposure to different conditions can wear down the gaskets. Always have your watch serviced regularly to maintain its water-resistant capabilities.
How To Care For Your Waterproof Watch
If you want your watch to stay water-resistant, regular maintenance is key. Here’s what you should do:
- Have it serviced regularly: A professional service every 1-2 years can help ensure your watch stays waterproof.
- Rinse after exposure to saltwater: Saltwater is corrosive and can damage your watch. Rinse it with fresh water after swimming in the sea.
- Avoid pressing buttons underwater: If your watch has a chronograph or other buttons, avoid pressing them while submerged, as this can compromise its water resistance.
- Store it in a cool, dry place: High temperatures and humidity can damage your watch over time.
Popular Waterproof Watches To Consider
If you’re in the market for a reliable waterproof watch, here are a few top contenders:
- Seiko Prospex Diver Automatic Watch: Offering 200-metre water resistance, this automatic watch is perfect for both casual swimmers and divers. Its luminous hands ensure easy readability underwater.
- Citizen Eco-Drive Diver Watch: Powered by light and water-resistant up to 200 metres, this eco-friendly option is scratch-resistant and boasts a five-year warranty.
- Omega Seamaster Planet Ocean Chronograph: A high-end choice with a 600-metre water resistance, making it ideal for deep-sea divers. The stylish design doesn’t hurt either.
- TAG Heuer Aquaracer Calibre 16 Chronograph: With a 500-metre water resistance and robust design, this model is perfect for those who need a combination of style and durability.
- Breitling Superocean Héritage II Chronograph 44: Boasting a 200-metre water resistance, this self-winding watch has a power reserve of 70 hours, making it dependable for long adventures.
Every Watch Has Its Limitations…
While many watches are marketed as waterproof, it’s essential to understand the limitations of water resistance. No watch is entirely waterproof in every scenario, so it’s important to follow the manufacturer’s guidelines, inspect the gaskets, and get your watch serviced regularly to keep it functioning optimally.
With the right care, your water-resistant watch can accompany you on many underwater adventures—just be sure to know its limits, regardless of its advertised water resistance. To make sure your watch is really waterproof, check the maker’s instructions for any specific conditions under which it shouldn’t be worn, take a look at the gaskets for signs of wear or damage, and submerge it in water to see how long it keeps running.
