Watch Water Resistance Guide

If you've ever wondered whether your watch is safe to wear swimming, in the shower, or just caught in the rain, you're not alone. Water resistance is one of the most misunderstood things about watches — and the labelling doesn't always help. Here's what it all means in plain English.

Water Resistant Doesn't Mean Waterproof

No watch is truly waterproof. "Water resistant" means a watch has been tested to withstand a certain static pressure — but that's very different from real-world conditions. Moving your wrist quickly through water, diving in, or even a powerful shower creates far more pressure than the rating suggests. As a rule of thumb, always go one level above what you think you need.

Water Resistance Ratings — What They Actually Mean

A 30M rated watch is fine for accidental splashes — washing your hands, getting caught in the rain — but not for swimming or showering. A 50M rating is the minimum we'd suggest for regular swimming.

A Few Golden Rules

Never pull the crown out when the watch is wet — this is one of the most common ways moisture gets inside. Always make sure the crown is pushed fully in before any contact with water.

Don't wear any watch in a hot shower, bath, or sauna — even a highly rated one. Heat and steam cause gaskets to expand and contract, which degrades them faster than cold water ever would.

After swimming in the sea or a pool, rinse your watch with clean fresh water and dry it thoroughly. Salt and chlorine are hard on seals and finishes over time.

Water Resistance Doesn't Last Forever

The gaskets and seals that keep water out degrade naturally over time — and every time a watch is opened (for a battery change, for example) there's a risk to the seal. We recommend having your watch re-sealed and tested at a specialist service centre at least every couple of years, or whenever the case is opened.

If you notice any condensation under the glass, stop wearing the watch immediately and bring it in — moisture inside the case can cause serious damage if left.

Watch Without a Water Resistance Rating

If your watch has no water resistance marking at all, treat it as having none. Keep it away from moisture, steam, and even humid environments where possible.

Need Your Watch Serviced or Repaired?

If you're in Bridgwater, pop into Jools on the High Street and we'll take a look. Or visit our watch repairs and servicing page for details on what we offer and how to get a quote.