The Coastline Rule
A straight beach facing the wind gives stable wind. A curved coastline creates wind lines that bend and twist. This produces gusts.
Headland Effects
Wind accelerates around a point and slows behind it. If you ride near a headland, expect a mix of strong gusts and weak lulls.
Bay Effects
Wind entering a deep bay spreads out like a fan. This creates uneven pressure. Near the center of the bay the wind is steady. Near the sides, it becomes patchy.
Beach Shapes:
Straight Beach
Even wind arrows = stable conditions
Curved Bay
Arrows bending and spreading = patchy wind
Summary
The beach shape controls the wind quality. Ride where the wind can hit the shore cleanly.