By definition from the Saffir/Simpson Hurricane Scale:
Category 1: Winds 74-95 mph, Storm Surge 4-5 ft
Category 2: Winds 96-110 mph, Storm Surge 6-8 ft
Category 3: Winds 111-130 mph, Storm Surge 9-12 ft
Category 4: Winds 131-155 mph, Storm Surge 13-18 ft
Category 5: Winds >156 mph, Storm Surge > 19 ft