Why Winchelsea was fought without naval artillery

Was artillery used at the Battle of Winchelsea?

No; contemporary artillery was too unreliable for shipboard combat, so the battle relied on archers and boarding actions.

Edward's armies could carry siege bombards on land, but those cumbersome weapons were not suitable naval guns. Damp powder, immature weapons, and shipboard conditions made artillery impractical. At Winchelsea the decisive tools remained missile fire, grappling, and close combat. The contrast marks an important boundary between early land use of gunpowder and the later development of reliable shipboard artillery.