Water Resistance Guide
Choosing a watch with the right level of water resistance is important, but it's also one of the most misunderstood features of any watch.
A common misconception is that a watch marked 30 metres (30m) can safely be worn underwater to a depth of 30 metres. In reality, this is not how water resistance ratings work.
Water resistance ratings are determined under controlled laboratory conditions using static pressure. Everyday activities such as swimming, showering, diving into water or even rapid arm movements can expose a watch to pressures significantly greater than those experienced during laboratory testing.
This guide explains what water resistance ratings actually mean, what activities they are generally suitable for and how you can help protect your watch.
Understanding Water Resistance
A water resistance rating is not a measure of the depth you can safely take your watch underwater.
Instead, it indicates the level of water pressure the watch was able to withstand during controlled laboratory testing when new.
Real-world conditions are very different. Movement, water impact, temperature changes and ageing seals can all reduce a watch's resistance to water.
For this reason, a watch's water resistance rating should be viewed as guidance for appropriate everyday use rather than the maximum depth at which it can safely operate.
No watch should be regarded as permanently waterproof.
Water Resistance Ratings Explained
The Biggest Misconception
Perhaps the most common misunderstanding is believing that:
30 metres = suitable for diving to 30 metres.
This is incorrect.
A 30m water resistant watch should not be worn for swimming, showering or bathing.
The rating simply reflects the pressure applied during laboratory testing, not real life underwater use.
Similarly:
- 50m does not necessarily mean the watch is suitable for all swimming activities.
- 100m does not automatically mean it is suitable for scuba diving.
- Always follow the manufacturer's guidance for your specific watch model.
Why Showering Can Damage a Watch
Many people assume that because a watch is water resistant, it is safe to wear in the shower.
In reality, showering is one of the most common causes of water damage.
Hot water and steam can cause the rubber seals inside the watch to expand and contract. Soap, shampoo and detergents may also affect the seals over time.
Even if water does not enter immediately, repeated exposure can gradually reduce the watch's ability to resist moisture.
For this reason, Fashion Watch Studio recommends removing your watch before showering, bathing, using a hot tub or entering a sauna, regardless of its stated water resistance rating, unless the manufacturer specifically advises otherwise.
Swimming & Water Sports
If your watch is suitable for swimming:
Before entering the water:
- Ensure the crown is fully pushed in or screwed down where applicable.
- Never operate push-buttons underwater unless the manufacturer specifically states that it is safe to do so.
- Avoid exposing the watch to sudden impacts against pool edges or hard surfaces.
- After swimming in the sea or a chlorinated pool, rinse the watch with clean fresh water and dry it thoroughly with a soft cloth.
Leather Straps & Water
Leather straps are not designed for prolonged contact with water.
Repeated exposure can cause:
- Cracking.
- Discolouration.
- Stiffening.
- Odours.
- Premature wear.
If your watch is fitted with a leather strap, we recommend removing it before any activity involving water.
Maintaining Water Resistance
Water resistance is not permanent.
Over time, normal wear, accidental knocks and ageing seals may reduce your watch's ability to resist water.
If you regularly expose your watch to water, periodic inspection and replacement of seals in accordance with the manufacturer's servicing recommendations can help maintain its water resistance.
Looking After Your Watch
To help maximise the life of your watch, we recommend:
- Avoid wearing your watch in hot showers, baths, hot tubs or saunas.
- Always ensure the crown is fully closed before contact with water.
- Never operate crowns or push-buttons underwater unless specifically permitted.
- Rinse your watch after exposure to salt water or chlorinated pools.
- Avoid exposing your watch to sudden temperature changes
- Have seals inspected during routine servicing where recommended.
Water Resistance & Warranty
Water ingress can occur for many reasons, including accidental damage, impact, deterioration of seals, improper operation of the crown or use outside the manufacturer's recommended water resistance guidance.
For this reason, water damage is not automatically considered a manufacturing defect and may not be covered under the Fashion Watch Studio Warranty.
Please refer to our Warranty Policy for full details of warranty coverage and exclusions.
Frequently Asked Questions
Is a 30m watch waterproof?
No. A 30m watch is designed to resist accidental splashes and rain but is not suitable for swimming, showering or bathing.
Can I wear a 50m watch while swimming?
Some manufacturers consider 50m watches suitable for light swimming, while others recommend avoiding prolonged immersion. Always refer to the manufacturer's guidance for your specific model.
Can I shower wearing my watch?
We recommend removing your watch before showering, regardless of its water resistance rating, unless the manufacturer specifically advises otherwise. Hot water, steam and soap can reduce the effectiveness of water resistant seals over time.
Why did water get into my watch if it is water resistant?
Water resistance can reduce over time due to ageing seals, accidental impacts, improper use of the crown or exposure to hot water and steam. Water resistance is not permanent and should not be considered a guarantee against water ingress under all conditions.
Need Assistance?
If you have any questions about the water resistance of a particular watch before making a purchase, our Customer Support team will be happy to help.
Email: support@fashionwatchstudio.com
Telephone: 0203 456 5368
Customer Service Hours: Monday to Friday, 9:00am – 5:00pm (excluding UK public holidays)
