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Boating Under the Influence in California

How California law treats boating under the influence (bui): what is illegal, whether it is a misdemeanor or felony, and the penalties, from the state code.

Short answer: It is illegal to operate a boat, or water skis or a similar device, while under the influence of alcohol or drugs, with a blood alcohol level of 0.08% or more in a recreational vessel, or 0.04% or more in any other (for example commercial) vessel. Cal. Harb. & Nav. Code 655(b)-(f), 668(e)-(h); Pen. Code 17, 18, 19, 1170(h)

Boating under the influence (BUI)It is illegal to operate a boat, or water skis or a similar device, while under the influence of alcohol or drugs, with a blood alcohol level of 0.08% or more in a recreational vessel, or 0.04% or more in any other (for example commercial) vessel. A first offense is a misdemeanor punishable by up to 6 months in county jail and/or a $1,000 fine, and the court may order an alcohol or drug program. A second offense within 7 years of a prior boating or driving DUI conviction is up to 1 year in jail and/or $1,000. Boating under the influence that causes injury to another person is punishable by a 1170(h) felony term or 90 days to 1 year in county jail, plus a $250 to $5,000 fine.
Penalties: https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HNC&sectionNum=668 . Penalty background (Pen. Offenses punishable either in county jail up to 1 year or as a felony are 'wobblers' that can be charged as a misdemeanor or felony (Pen. Code 17(b)).

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FAQ

What is the penalty for boating under the influence in California?
It is illegal to operate a boat, or water skis or a similar device, while under the influence of alcohol or drugs, with a blood alcohol level of 0.08% or more in a recreational vessel, or 0.04% or more in any other (for example commercial) vessel. A first offense is a misdemeanor punishable by up to 6 months in county jail and/or a $1,000 fine, and the court may order an alcohol or drug program. A second offense within 7 years of a prior boating or driving DUI conviction is up to 1 year in jail and/or $1,000. Boating under the influence that causes injury to another person is punishable by a 1170(h) felony term or 90 days to 1 year in county jail, plus a $250 to $5,000 fine.
Can I get a court-appointed lawyer for boating under the influence (bui) in California?
California's rule on court-appointed lawyers: At the arraignment, if the defendant cannot afford a lawyer, the judge will appoint one, typically a public defender, free of charge. If the public defender cannot take the case or there is no public defender in the area, the court will usually appoint another lawyer. California Courts Self-Help Guide, 'The arraignment'
How much does a lawyer for boating under the influence (bui) cost in California?
Lawyers set their own fees, and California has rules on how they may charge. See hiring a criminal defense lawyer in California for fee rules, how to check a lawyer's license and free help.
What happens after an arrest for boating under the influence (bui) in California?
How release before trial works in California: Each county superior court adopts a bail schedule under Penal Code § 1269b; it fixes the amount on which a person arrested without a warrant may be released before appearing in court. After the first court appearance, the amount of bail is within the judge's discretion and may be higher or lower than the schedule, subject to Penal Code § 1275 and controlling case law, including In re Humphrey (2021) 11 Cal.5th 135. Persons not entitled to bail are those charged with capital crimes when the facts are evident or the presumption great; felonies involving acts of violence when the facts are evident or the presumption great and the court finds by clear and convincing evidence a substantial likelihood that release would result in great bodily harm to others; and felonies when the facts are evident or the presumption great and the court finds by clear and convincing evidence that the person threatened another with great bodily harm and would likely carry out the threat. For serious and violent felonies and certain domestic-violence and stalking offenses, release on bail in an amount other than the schedule requires a hearing in open court. At arraignment the judge may release a defendant on his or her own recognizance, release under supervision, set bail, or not set bail; typically, someone charged only with misdemeanors will be released on their own recognizance. Cal. Const. art. I, § 12; Cal. Penal Code §§ 1269b, 1270.1, 1270.5, 1275; Santa Clara County Superior Court 2026 Criminal Bail Schedule; California Courts Self-Help Guide What happens after an arrest.
Can a conviction for boating under the influence (bui) be removed from my record in California?
Each state sets its own rules for sealing or expunging records. See California expungement and record sealing rules.

General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.