The weather side (or windward side) in sailing is the side of a boat, ship, or object directly exposed to the wind. It is the side from which the wind is blowing, generally acting as the "upwind" side of the vessel. This side faces higher wind pressure and is the opposite of the leeward side.

Key Aspects of the Weather Side:
Wind Interaction: This is where the wind hits the vessel first.

Sailing Direction: On a sailboat, the weather side is typically the side that is raised (closer to the wind) while heeling.

Tack Identification: On a sailboat, the weather side is the "tack" of the vessel; for example, if the wind is coming from the starboard side, the starboard side is the weather side.

Safety and Navigation: The weather side can experience increased wind and wave impact, often leading to potential spray.