The Garmin Forrunner watches are waterproof. They have a water rating of 5ATM, or 5 atmospheres. They are waterproof down to a depth of 50 meters. Many models measure metrics for pool and open water swimming and can measure heart rate underwater. The Forrunner is a waterproof watch that is suitable for swimming. , The Garmin Forerunner comes with a variety of modes and functions and includes walking, running, and many other forms of activities. It does not track any water activities and is mainly designed for runners and cyclists although it is waterproof up to 50 meters. , The Garmin Forerunner is waterproof in depths up to 50 meters. It is designed for use in rain and snow and for water activities like showering, swimming, and snorkeling.