Water Resistance Table

Water resistance is the ability to withstand pressure in/under water.  In this sense, the term water resistant can be misleading because it relates to pressure and not physical depth.  Generally speaking, a watch used for water sports and swimming should have at least 100m (10bar) water resistance. This table is designed as a guide to pressure/water resistance but always check the manufacturer’s specification to make sure you are using your watch in the correct manner in the appropriate environment:

Water resistance levelSuitabilityRecommendations
Water resistant 30 m or 50 m

(3 ATM or 5 ATM)

Suitable for washing hands and light splashes.Not suitable for swimming or diving
Water resistant 100 m (10ATM)Suitable for recreational surfing, swimming, snorkeling, sailing and water sports.Not suitable for diving
Water resistant 200 m (20ATM)Suitable for professional marine activity and serious surface water sports.Suitable for diving
Diver’s 1000+m (100+ ATM)Suitable for all water activitiesTypical rating for modern diving watches


Watches and humidity – the real foe!

Please note all watches, even those with 100m+ water resistance, should be kept away from humid shower and spa conditions.  Although these watches are watertight, they are not necessarily resistant against humid/hot air which can permeate the watch and allow moisture into the movement.