Reflected sunlight from outside flickers across the water and reflects on the stone ceiling in this mostly submerged cave. The waters are cold, but not to a life-threatening degree, and the motion of the surf outside sends mild, rocking waves across the chamber. A passageway extends to the north, and to the south is the cave entrance.
Variel: I rolled you a perception of 11 on roll20. The reflected sunlight does light up the cave, acting as a natural mirror. The water inside the cave is calmer than in the bay, making it a DC 5 swim check. The sound of water flowing in and out echo's off the cave walls.