Belle Haven is located at 38°47'7" North, 77°3'47" West (38.785278, -77.063056).
According to the United States Census Bureau, the town has a total area of 2.65 mi2 (6.86 km2). 1.97 mi2 (5.10 km2) of it is land and 0.68 mi2 (1.76 km2) of it is covered by water. The total area is 25.61% water.
Belle Haven is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).