How many letters does the top answer for “on the side exposed to the wind” have?

The most common answer is windward (8 letters).

Crossword clue: on the side exposed to the wind

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

windward 8 letters wn-def

the side of something that is toward the wind

towards the side exposed to wind 75% similar → upwind

on the side away from the wind 50% similar → leeward

the side toward the wind 50% similar → weatherboard