Yes, Mandalay Bay heats its pools to ensure guest comfort, although the availability of its massive 11-acre aquatic playground is highly seasonal. While the famous "Mandalay Bay Beach" wave pool and Lazy River typically close during the colder winter months (usually November to February), the resort maintains at least one heated pool year-round for guests, such as the West Lagoon. In 2026, Las Vegas resorts generally keep their active pools at a temperature of around 80°F to 82°F. During the peak "pool season" (March to October), all areas—including the beach-entry pools and the Moorea Beach Club—are heated. Guests looking for a soak in even warmer water can utilize the multiple heated whirlpools and spas located throughout the complex. Always check the specific "Pool Hours" on the MGM Resorts app during your 2026 visit, as adverse weather can occasionally cause temporary closures.