A foresail refers to one of several types of sail set on the foremost mast (foremast) of a sailing vessel:

• Any triangular sail set forward of the foremast, such as a jib.
• A square fore and aft sail set on the foremast, but behind it, on a schooner or other similar vessel.
• The lowest square-sail on the foremast of a full-rigged vessel, or any other vessel which is square-rigged on the foremast (such as a brigantine or barquentine).

See also

• Sail plan

Sailing vessels and rigging