A cove is a small type of bay or coastal inlet. Coves usually have narrow, restricted entrances, are often circular or oval, and are often situated within a larger bay. Small, narrow, sheltered bays, inlets, creeks, or recesses in a coast are often considered coves. Colloquially, the term can be used to describe a sheltered bay.

Geomorphology describes coves as precipitously walled and rounded cirque-like openings as in a valley extending into or down a mountainside, or in a hollow or nook of a cliff or steep mountainside.

Coves are formed by differential erosion. Differential erosion occurs when softer rocks are worn away faster than the harder rocks surrounding them. These rocks further erode to form a circular bay with a narrow entrance called a cove.

An example of a cove is Lulworth Cove on the Jurassic Coast in Dorset, England. West of it a second cove, Stair Hole, is forming.