At or above a breath alcohol level of 0.08% (0.08), a boater in Florida is legally considered “under the influence.”

Key point

  • Florida’s boating under the influence (BUI) law sets the legal limit at a breath or blood alcohol concentration of 0.08% or higher for adults 21 and over.
  • Below 0.08%, an officer can still charge BUI if your abilities appear impaired (field sobriety tests, erratic operation, etc.).

Why this matters on the water

  • Alcohol affects balance, vision, and judgment, and those effects are worse on the water because of sun, motion, and fatigue.
  • The U.S. Coast Guard reports that operators with a BAC above 0.10% are over 10 times more likely to die in a boating accident than those with zero BAC.

In practical terms: if a breath test shows 0.08% or more , you’re over the legal limit and presumed impaired for boating in Florida.

TL;DR: For the question “at what breath alcohol level would a boater be considered under the influence in Florida,” the answer is 0.08%.

Information gathered from public forums or data available on the internet and portrayed here.