Key Biscayne gives Miami beachgoers two very different ways to spend a day by the Atlantic. Crandon Park Beach is the easygoing, amenity-rich choice, with a long protected shoreline and plenty of room for a classic family beach setup. At the island’s southern tip, Bill Baggs Cape Florida State Park feels more tucked away: come for the beach, but stay for the lighthouse, nature trails and Biscayne Bay views.

At a glance

  • Best for families and cautious swimmers: Crandon Park Beach.
  • Best for a quieter, more outdoorsy beach day: Bill Baggs Cape Florida State Park.
  • Best for a historic add-on: Bill Baggs, thanks to the Cape Florida Lighthouse.
  • Best if you arrive later on a busy weekend: Crandon, which has substantially more parking.

Parking costs and getting in

At Crandon, parking is currently $7 plus tax Monday through Thursday and $10 plus tax Friday through Sunday. The beach area has parking for just under 3,000 vehicles, a major practical advantage for families hauling coolers, strollers and shade gear. It is still a beloved local beach, though, so an early arrival makes weekends smoother.

Bill Baggs charges a park-entry fee rather than a separate beach-parking rate: $8 per vehicle for two to eight people, $4 for a single-occupant vehicle or motorcycle, and $2 for pedestrians, bicyclists and additional passengers. The park is open daily from 8 a.m. until sundown. Its smaller, more contained footprint is part of the appeal, but it comes with a real weekend catch: the entrance closes once the park reaches capacity, and it does not reopen for at least two hours. That closure applies to cars, walkers and cyclists alike. For a Saturday, Sunday or holiday visit, get there early rather than treating Bill Baggs as an afternoon backup plan.

Water conditions: calm does not mean risk-free

Crandon’s offshore sandbar helps soften the surf, making its water generally calmer and more forgiving-looking than many open-ocean Miami beaches. It also has Miami-Dade Ocean Rescue lifeguards; county public beaches are guarded from 8 a.m. to 6 p.m. every day. That combination makes Crandon the stronger pick for families with younger swimmers, provided you stay within the guarded area and follow the day’s flags.

Bill Baggs has gentle waves much of the time, aided by a reef offshore, and its 1.25-mile Atlantic beach is lovely for a long swim or a float near shore. But there are no lifeguards, so swimming is at your own risk. Winter visitors should also pay close attention to Portuguese man-of-war warnings. At either beach, surf, currents, lightning, marine-life flags and water-quality advisories can change the plan quickly; check current conditions and posted warnings before getting in.

Amenities and beach-day comfort

Crandon is designed for a low-fuss full day. Along its two miles of sand, you will find a promenade, concessions, chair and umbrella rentals, cabanas, picnic areas with tables and grills, restrooms and a beachside carousel. The nearby Family Amusement Center adds another option when little ones need a break from the water. It is the better choice for a multi-generation group that wants maximum convenience and minimal walking between the car, shade, snacks and sand.

Bill Baggs feels less built-up, but it is far from bare-bones. The park has restrooms, outdoor showers, picnic tables and grills, 18 covered pavilions, beach chair and umbrella rentals, accessible beach and swimming wheelchairs, a Mobi Mat at Beach Access No. 6, and water-bottle refill stations. The Lighthouse Café faces the ocean, while Boater’s Grill sits across the park at No Name Harbor. A refillable insulated water bottle is especially handy here if you plan to walk the grounds between beach sessions.

The lighthouse difference

This is where Bill Baggs decisively wins. The 1825 Cape Florida Lighthouse is included with park entry, and guided tower tours run from 10 a.m. to noon Thursday through Monday. The tower is closed Tuesdays and Wednesdays. Visitors must be at least 42 inches tall to climb, and everyone going up needs to manage 109 narrow spiral steps, so it is not a fit for every child or visitor with mobility limitations. Even if you skip the climb, the lighthouse grounds, coastal trails and western-facing views toward Stiltsville turn a beach outing into a proper Key Biscayne day trip.

The bottom line

Pick Crandon Park Beach when your priorities are lifeguards, calm water, easy parking and kid-friendly conveniences. Pick Bill Baggs when you want a more scenic, nature-forward beach day with a lighthouse tour, trails and a quieter atmosphere—just commit to an early start on busy days. Whichever you choose, pack sun protection, watch the flags and leave enough time to enjoy Key Biscayne at its unhurried best.