I've travelled to Cozumel many times but this time rates have skyrocketed. Either book a tour with the ship or rent a car but be aware that entrance fees for their best beaches can run from $20-30 per person in U.S. Dollars. A cab to take you to the north part of the island will cost approx. $120.00. Not much to do but shop within walking distance. Definitely planning a spa day on the ship and skipping this port next year!
We took a cab to the club beach and it was amazing. Entrance to the beach with free wi-FI was $2.00 for adults and children under 12 free. The cab was round trip $24.00 as 5 and under ride free. The sand was like sugar and chair and umbrella rentals were $14.00 per set. Excellent port.
We took a local taxi to Doctors Beach and it was fabulous. The sand is smooth and the waters are so clear you don't need a mask. The taxi fair and beach entrance for a family of four was $56.00.