Pebble smartwatches have different levels of water resistance. Please find your model below for more information.
Pebble Classic, Pebble Time, Pebble 2:
Water resistant to 30m with water resistant bands, these watches can be used in the pool, the shower, or the rain with no problems.
Pebble Steel, Pebble Time Steel:
The watch body is water resistant to 30m, but the default band is leather. These watches with their original bands are not designed for contact with water, however switching to a rubber, silicone, or metal band allows them to be submerged up to 30m without issue.
Pebble Time Round:
The Round is splash resistant and the default leather bands are not water resistant. If the Round gets splashed while washing your hands, or you get caught in the rain, it will be just fine, but it should be removed when swimming or diving.