While tidal, the variation in tide heights in the Chowan River are normally less than one foot (30 cm) between high and low tide. The average depth is 16 feet and the maximum depth is 40 feet around Holiday Island.
The Chowan River experiences tidal fluctuations with a typical height difference of under one foot (30 cm) between high and low tides. Its average depth is 16 feet, reaching a maximum of 40 feet near Holiday Island.