Yes, you can easily walk from the St. Maarten cruise port (A.C. Wathey Pier) to Great Bay Beach in Philipsburg. The walk takes approximately 10 to 15 minutes along a well-maintained sidewalk and pedestrian path. Once you reach the end of the port area, you will find the "Boardwalk," a vibrant 2-mile stretch lined with bars, restaurants, and shops that runs directly alongside the beach. For those who prefer not to walk or are carrying heavy beach gear, a Water Taxi service is available from the pier for a small fee (around $7 for an all-day pass), which drops you off right at the center of the Boardwalk. While Great Bay Beach is the most accessible, it is worth noting that it is a busy city beach; for the famous "airplane" experience at Maho Beach or the turquoise waters of Orient Bay, you will need to take a taxi or bus.
That depends on which St. Maarten port your ship is docking at, as there are two main cruise ports on the Dutch side of the island:
This is the large, modern pier where the vast majority of cruise ships dock. Walking to a beach? YES, absolutely. The closest beach is Great Bay Beach. It’s a long, crescent-shaped beach lining the capital city of Philipsburg. Walking time: About a 15-25 minute walk from the cruise port, depending on your ship’s exact berth. The route: You’ll walk along the harbor front, past the courthouse, and into the heart of Philipsburg. The beach is just on the other side of the main street (Front Street). It’s a flat, easy, and safe walk with plenty of other passengers heading the same way. What to expect: Great Bay Beach has calm water, plenty of beach bars/restaurants (with chairs/umbrellas for rent), and all the amenities. It’s a great, convenient option.
A few smaller ships might dock right in downtown Philipsburg at this older pier. Walking to a beach? YES, even easier. You are essentially already in downtown Philipsburg. Great Bay Beach is just a 2 to 5-minute walk across Front Street.