Old Saybrook, Connecticut is a charming coastal town situated at the mouth of the Connecticut River. It has a humid subtropical climate, characterized by hot, humid summers and cool, damp winters. The town experiences moderate rainfall throughout the year.

Old Saybrook is blessed with a beautiful hydrology system, as it is bordered by the Connecticut River to the west and the Long Island Sound to the south. These water bodies provide excellent opportunities for boating, fishing, and other water-based activities.

Outdoor enthusiasts can also enjoy the town's numerous parks, including the Saybrook Point Park and Preserve, offering scenic trails, picnic spots, and birdwatching opportunities. The town is also home to several beaches, such as Harvey's Beach and Town Beach, where visitors can relax, swim, and soak up the sun.