Why Your Waterproof Watch Might Not Be as Water-Resistant as You Think

Don't Get Soaked: Why Your "Waterproof" Watch Might Not Be Pool-Proof

Many of us are captivated by the sleek, stylish waterproof watches showcased in advertisements, often seen on the wrists of models effortlessly splashing in rocky beaches or withstanding powerful waterfalls. These images create an enticing image of durable timepieces that promise to protect against water damage for a lifetime. However, the truth is that the reality of most watches labelled as ‘waterproof’ can be quite different. 

Here’s the reality check: your beloved waterproof watch may not be as resilient as you might think. Let's explore some important factors that contribute to this discrepancy and help you understand the actual limitations of waterproof watches.

Water Resistant vs. Waterproof: Understanding the Difference

The precise difference always seems to be embedded in the words used to refer to the concept. “Waterproof” means absolutely protected from water, and on the other hand, “Water resistant” means it can endure water exposure to an extent. The vast majority of digital watches are of the latter type.

This water resistance is expressed in ATM – Atmosphere or Metres. Thus, a 5 ATM or 50m rating means that, in theory, the watch is protected against pressure that is equivalent to that at 50 metres underwater.

However, there are crucial factors to consider beyond this static depth rating:

• Activity: All the above ratings, however, are based on the understanding that the watch is stationary. Swimming, for instance, constantly involves the pressing and movement of water, and this puts pressure on the seals.

• Temperature: Sealants can swell or shrink due to the heat that comes from hot tubs or using hot showers. This contributes to a bad seal.

• Chemicals: Chlorine from pools and salt in seas and oceans affect the seals, thereby degrading them. 

• Everyday Wear: Typically, there are seals in the shower area that can be weakened by soap, shampoo, and constant sweating, resulting in the wearing down of the watch. 

• Crown and Pushers: These are the most vulnerable areas where water can enter a watch. Ensure that your watch is securely fastened and screwed tight before use. 

Decoding the Water Resistance Rating: A Guide

Here's a breakdown of common water resistance ratings and their suitability for different activities:

• 3 ATM (30 metres): Splash-proof only. Can handle rain or washing hands, but not submersion.

• 5 ATM (50 metres): Suitable for shallow swimming or showering, but not ideal for diving or high-impact water sports.

• 10 ATM (100 metres): Good for swimming and snorkelling, but not for deep diving.

• 20 ATM (200 metres) & Above: Ideal for recreational diving and water sports with high water pressure.

These are just general guidelines. Always refer to your digital watch's specific user manual for detailed recommendations.

Understanding Different Water Resistance Markings: Beyond ATM and Metres

As much as ATM and metres are standard measurements of water resistance, you could come across some additional symbols on your watch or on the product’s packaging. Here's a quick guide to understanding them:

• "Water Resistant": This is the most fundamental classification and typically refers to a product that has only splash-proofing, meaning it is resistant to water droplets.

• "Shower Resistant": Is good under light splashes, which may occur in the shower, but cannot withstand direct water hose streams.

• "Diver's X Metres": This refers to professional diving watches and is assigned the ISO 6422 number. Said watches are tested for water resistance and shock resistance, among other factors that are especially important for underwater usage. The “X” will be substituted with another depth rating for recreational or saturation divers.

However, please bear in mind that what you are about to read is just a template, or rather, a standard pattern. It is always important to consult the user’s manual of your watch to know how to clean it, and other restricted activities you are supposed to avoid. With this understanding of the markings, it is possible to make informed decisions about wearing a watch in various situations.

Taking Care of Your Water-Resistant Digital Watch

Just like any prized possession, your digital watch deserves proper care to maintain its water resistance:

• If your watch has come in contact with saltwater, you need to rinse it with fresh water, as salt will lead to corrosion of the metal components. 

• Wipe gently with a soft cloth, especially around the crown area and the pushers, until the watch is thoroughly dry.

• Avoid extreme temperatures.

• Have the seals inspected and potentially replaced by a professional watchmaker every 1-2 years, especially for frequently used watches.

When to Leave Your Watch on Land

Here are some situations where it's best to leave your watch behind, regardless of its rating:

• High-impact water sports:
  Surfing, whitewater rafting, and other activities with sudden water pressure changes pose a high risk.

• Hot springs and saunas:
  The extreme heat can damage the seals and internal components.

• Direct chemical exposure:
  Avoid harsh chemicals, such as bleach or certain cleaning agents.

Just In Time for Peace of Mind

Water resistance is a beneficial feature for waterproof digital watch connoisseurs; however, expectations should be properly set. For actual diving or other activities that require immersion in water, it is recommended that one obtain a professional dive watch with a higher level of water resistance, as indicated by a higher ATM rating.

However, if you plan to use it for daily purposes and swim at least once or twice a week, a waterproof digital watch with a high ATM rating and in good condition from a reputable manufacturer can suffice.

Just In Time is a reputable showroom chain that specialises in the sale of waterproof digital watches, with 80+ outlets in India. All our digital watches are available, and our friendly staff will help you select a watch that is ideal for you, taking into account your everyday activities, as well as offering advice on how to maintain it. Therefore, run to your nearest Just In Time store to get your waterproof digital watch that meets the activities of the active life without getting damaged by water!

FAQs on Waterproof Watches

1. Are waterproof watches truly 100% waterproof?
No. Most so-called waterproof watches are technically water-resistant, meaning they can handle a certain level of water exposure but are not completely impervious to water under all conditions.

2. What does a 3 ATM, 5 ATM, or 10 ATM rating on waterproof watches mean?

• 3 ATM (30 m): Splash-proof; safe for rain or hand-washing.

• 5 ATM (50 m): Suitable for light swimming or showering.

• 10 ATM (100 m): Good for swimming and snorkelling.

• 20 ATM (200 m)+: Appropriate for recreational diving.
  These ratings assume the watch is stationary—movement, pressure surges, or heat can lower real-world resistance.

3. Can I wear my waterproof watch in a hot shower or sauna?
It’s not recommended. High heat causes seals to expand or shrink, weakening protection and risking internal condensation even in high-rated waterproof watches.

4. How often should the seals of waterproof watches be checked?
Have the gaskets and seals inspected and replaced every 1–2 years, or sooner if the watch is used frequently in water. This maintenance preserves the watch’s original resistance level.

5. What activities can damage waterproof watches despite a high rating?
High-impact water sports (surfing, jet skiing), exposure to chlorine or saltwater without rinsing, and contact with harsh chemicals can degrade seals and compromise resistance.