Cozumel, Mexico, is well-known for its nice mild waters, which are popular with both beachgoers and divers. The average temperature of Cozumel's seas ranges from 77°F (25°C) in the winter to 84°F (29°C) during the summer. Swimming, snorkelling, and diving are all enjoyable year-round because the cozumel mexico water temperature rarely drops. Whether you're planning a winter getaway or a summer adventure, the waters surrounding Cozumel provide an ideal setting for enjoying the spectacular marine life and bright coral reefs that Cozumel is known for.