Welcome to 79 Fairwater Avenue, an extraordinary custom-built Bayfront Colonial perfectly positioned along the Great South Bay in Massapequa. Offering breathtaking panoramic water views, this stunning 5-bedroom, 3-bath residence has been meticulously updated to deliver the ultimate in luxury waterfront living. From the moment you enter the grand foyer, you are greeted by timeless elegance and exceptional craftsmanship. The sophisticated sitting room features a gas fireplace accented with sleek black marble, complemented by a matching custom bar with a new beverage refrigerator. The beautifully appointed chef's kitchen showcases custom white cabinetry, a Wolf range, Thermador refrigerator, quartz countertops, a spacious eat-in island, built-in pantry, and a new Thermador dishwasher, flowing seamlessly into the dining area. A gracious formal living room with an additional gas fireplace creates the perfect setting for entertaining. The luxurious primary en-suite is a private sanctuary, featuring a full bath, his-and-hers closets, and a private balcony overlooking the magnificent Great South Bay. Additional highlights include brand-new Lennox 5-ton and Rheem 4-ton central air-conditioning systems, with additional vents installed in the expansive primary bedroom for enhanced comfort, Nest thermostats, central vacuum, a newer boiler, and hot water heater. Step outside to your own waterfront paradise, where a heated saltwater in-ground pool, newly converted from electric to gas heating, features a new 2025 liner and is surrounded by elegant travertine pavers. Additional exterior enhancements include new Nicolock pavers along the sides of the home and newly planted privacy trees throughout the yard and side property. Boating enthusiasts will appreciate the impressive 65-foot pier, vinyl bulkhead, and jet ski lift, offering exceptional access to the Great South Bay. Completing this remarkable property is a spacious 2-car garage with newly installed epoxy flooring, in-ground sprinklers, a roof approximately two years old, and an expansive attic with approximately 10-foot ceilings, offering exciting possibilities for future use. Flood insurance is approximately $932 annually. A rare opportunity to experience refined coastal luxury, spectacular sunsets, and the very best of Great South Bay waterfront living.