True wind is the actual speed and direction of the wind blowing across the water's surface, measured relative to a fixed point (not moving). It is the "real" wind, often called ground wind, independent of a boat's motion, and is used for weather forecasting, navigation, and determining overall sea conditions.

Key Aspects of True Wind:
Stationary Reference: You feel the true wind when at anchor or standing on land.

Vs. Apparent Wind: While true wind is the real wind, Apparent Wind is what you feel while moving, combining true wind with wind created by the boat's speed and direction.

True Wind Direction/Angle (TWA): Refers to where the wind is coming from relative to True North or the boat's bow.

Calculation: Sailing instruments calculate true wind by removing the effect of boat speed from the apparent wind.

True Wind Examples:
At anchor: If you are stationary, the wind on your face is the true wind.

While Sailing: If true wind is 10 knots and you sail directly into it at, the apparent wind feels like 15 knots (True + Boat Speed), but the true wind remains 1o knots.