one adjacent water space (Athletics - no difficulty number).
A strong current or other circumstances may provide a modifier to this roll.
You grant advantage to all enemies until you leave the water. Divide the check result by 5; this is the number of paces that you may swim through the water as part of this move action. If your check result is less than 5, you do not move, or are swept up by the current. On a critical failure, you suffer 1d6 damage as you begin to drown.