Only winter time when the season is you might need a shorty wetsuit when the cold fronts are going through during the air might be the lower 60°F and water around 70°F. The sason is from October till May.
Drive down US 1 towards Key West. The park is located along both sides of U.S. 1 starting at Little Crawl Key, Mile Marker 56.2, 11 miles west of Long Key (56200 Overseas Hwy). The entrance to the facilities is on the ocean side of US 1. The state park is open from 8 a.m. until sundown 365 days a year.