California boating laws require anyone operating a motorized vessel on state waterways to carry a California Boater Card, register the vessel with the DMV, keep Coast Guard-approved safety equipment on board, stay under a 0.08 blood alcohol concentration, and follow a stack of operating, environmental, and local rules. Most violations are infractions with fines; reckless operation and boating under the influence are misdemeanors, and causing injury or death can bring felony exposure.
Who Needs a California Boater Card
Since January 1, 2025, every person who operates a motorized vessel on California waterways must carry a California Boater Card, regardless of age.1California State Parks – Division of Boating and Waterways. California Boater Card FAQ You earn the card by passing a state-approved boating safety course, and it is good for life.
Alongside the card requirement, California sets a minimum age of 16 to operate a motorboat of 15 horsepower or more, including personal watercraft. Operators between 12 and 15 can run those vessels only with an adult 18 or older on board who holds a Boater Card.2California State Parks. Boating Laws Rules and License Requirements There is no age restriction for sailboats under 30 feet powered mainly by wind, or for dinghies used to travel between a moored vessel and shore.
You do not need a Boater Card if you are operating a rental vessel, boating under the direct supervision of a cardholder 18 or older, participating in an organized race or regatta, or you hold a current U.S. Coast Guard marine operator license or commercial fishing license. Out-of-state residents visiting California for fewer than 60 days are also exempt, provided they meet their home state’s boating education requirements.1California State Parks – Division of Boating and Waterways. California Boater Card FAQ The card rule does not reach sailboats or human-powered craft; those have their own operating rules but no card requirement.
Registering Your Vessel
If you own a motorboat of any size or a sailboat over eight feet long, you must register it with the California Department of Motor Vehicles before putting it on state waters.3California Department of Motor Vehicles. Boat/Vessel Registration Federally documented vessels are the one exception. The initial registration fee is $29 if you first register in an even year and $49 in an odd year, with a biennial renewal fee of $20. Freshwater vessels also owe the Quagga and Zebra Mussel Infestation Fee separately.4California Department of Motor Vehicles. Registration Fees
All vessel registrations expire on December 31 of every odd-numbered year. Miss that date and the DMV adds a 50-percent late penalty.5California Department of Motor Vehicles. Renewal – Agents Handbook for Registration of Undocumented Vessels When you sell a vessel, the new owner has 30 days to pay the transfer fee before a penalty attaches.6California Department of Motor Vehicles. Transfers – Agents Handbook for Registration of Undocumented Vessels
Your registration number must be permanently displayed on each side of the forward half of the vessel in plain vertical block characters at least three inches tall, in a color that contrasts with the hull. The current registration sticker must sit nearby. Officers routinely stop boats with missing or illegible numbers.7Legal Information Institute. California Code of Regulations Title 13, 190.00 – Display of Numbers
Required Safety Equipment
Every recreational vessel must carry specific gear, scaled to size, type, and propulsion. Showing up short gets you fined or ordered off the water.
Life Jackets
Everyone on board needs a U.S. Coast Guard-approved life jacket that fits them and matches the conditions. Vessels 16 feet and longer must also carry at least one throwable flotation device. Children under 13 must actually wear their life jacket while the vessel is underway.8California State Parks – Division of Boating and Waterways. California Required Boat Safety Equipment Sailboats have narrow exceptions allowing a child to go without a jacket if harnessed to the boat or inside an enclosed cabin.
Fire Extinguishers
Most motorized vessels must carry portable fire extinguishers, and the labeling rules shifted in 2022. On boats built in 2018 or later, only extinguishers rated 5-B or 20-B count. Vessels under 26 feet need at least one 5-B, unless the boat has an outboard engine, a portable fuel tank, and no enclosed spaces where vapors can collect. Boats 26 to 40 feet need two, and 40 to 65 feet need three. Older boats built from 1953 through 2017 can still use the legacy B-I or B-II labels, but any disposable extinguisher more than 12 years old has to be replaced.9United States Coast Guard. Fire Extinguishers Requirements for the Recreational Boater FAQ
Visual Distress Signals
Boats 16 feet or longer on coastal waters must carry visual distress signals suitable for day and night use. You can meet the rule with pyrotechnics such as hand-held red flares or floating orange smoke signals (at least three for day and three for night), or with a non-pyrotechnic combination of an orange distress flag for day and an electric SOS distress light for night. Pyrotechnic signals expire 42 months after manufacture, and expired ones do not count. Boats under 16 feet on coastal waters need night signals only.10Legal Information Institute. California Code of Regulations Title 14, 6692 – Visual Distress Signals-Required
Navigation Lights and Sound Signals
Navigation lights are required between sunset and sunrise and during periods of restricted visibility. A whistle, horn, or other sound-producing device must be on board for use in fog or emergencies.8California State Parks – Division of Boating and Waterways. California Required Boat Safety Equipment
Operating Rules on the Water
Reckless or negligent operation of a vessel is a misdemeanor under the Harbors and Navigation Code. The term reaches excessive speed near swimmers, docks, or other boats, along with dangerous maneuvers of any kind. Harbors and marinas carry a 5-mph speed limit, and no-wake zones are posted throughout the state to protect shoreline property and other watercraft from wave damage.2California State Parks. Boating Laws Rules and License Requirements
A first conviction for reckless or negligent operation carries a fine of up to $1,000, up to six months in county jail, or both.11California Legislative Information. California Harbors and Navigation Code 668 If someone is hurt or killed, exposure escalates sharply.
Boating Under the Influence
Operating a recreational vessel with a blood alcohol concentration of 0.08 percent or higher is illegal in California. The limit drops to 0.04 percent for commercial vessels and to just 0.01 percent for boaters under 21. Officers can conduct sobriety tests on the water, and the legal consequences track drunk driving on land.
A first BUI conviction is a misdemeanor punishable by up to $1,000 in fines, up to six months in jail, or both. Courts can also order completion of an alcohol or drug education program as a condition of probation. A second BUI within seven years raises the maximum jail term to one year, and prior DUI convictions on land count when determining whether an offense is a repeat.11California Legislative Information. California Harbors and Navigation Code 668
A BUI that injures or kills another person is a different animal. Conviction can bring a state prison sentence or a county jail term of 90 days to one year, plus fines ranging from $250 to $5,000.11California Legislative Information. California Harbors and Navigation Code 668
When You Must Report an Accident
The operator or owner of any vessel involved in a boating accident must file a written report with the Division of Boating and Waterways when the incident causes a death, an injury requiring medical treatment beyond first aid, a person missing from the vessel under circumstances suggesting death or injury, or property damage above $500.
The deadlines depend on severity. For a death within 24 hours, a disappearance, or a medical injury beyond first aid, the report is due within 48 hours. For property damage above $500 or a death occurring more than 24 hours after the incident, you have 10 days.12Legal Information Institute. California Code of Regulations Title 14, 6504 – Boat Accident Reports in Writing Failing to report is itself a violation, so if you have been involved in anything beyond a minor bump, file.
Environmental Rules
California enforces some of the strictest environmental rules for boaters in the country, covering sewage, fuel, and invasive species.
Any vessel with an installed toilet must have a U.S. Coast Guard-certified marine sanitation device. In designated no-discharge zones, even treated sewage cannot be released into the water. California’s no-discharge zones include Lake Tahoe, Mission Bay, San Diego Bay, Newport Bay, Avalon Bay Harbor, and Huntington Harbor, among others. In those waters, all waste must be retained on board and emptied at onshore pump-out stations.13California State Parks – Division of Boating and Waterways. Federal Marine Sanitation Device Regulations
Discharging oil, fuel, or hazardous substances into state waters is prohibited under the California Water Code. Violations can bring fines of up to $5,000 per day, and failing to report a discharge is itself a misdemeanor.14California Legislative Information. California Water Code 13272 – Waste Discharge Requirements Separate civil penalties for pollutant discharge can reach $25,000 per violation under other Water Code provisions.
Freshwater boaters also face inspection and decontamination rules at many lakes aimed at stopping quagga and zebra mussels from spreading between water bodies.
Owner Liability When Someone Else Is Driving
You can be held liable for injuries caused by someone else operating your boat. Under the doctrine of negligent entrustment, if you lend your vessel to someone you know or should know is inexperienced, reckless, or impaired, and that person causes an accident, you share legal responsibility for the harm. This comes up often when owners hand the wheel to friends or family without thinking about whether those people can safely run the boat.
Federal maritime law offers one potential shield. Under 46 U.S.C. ยง 30505, a vessel owner can petition to limit liability for certain claims to the value of the vessel and any pending freight, provided the loss happened without the owner’s knowledge or involvement. The limitation does not apply to wage claims, and it requires proving genuine lack of awareness of the dangerous condition.15Justia Law. 46 USC 30505 – General Limit of Liability For most recreational owners, the practical answer is simpler: do not hand the wheel to anyone who is not competent and sober.
Local Rules That Add to State Law
Counties, cities, and special districts write their own rules for their waterways, and those rules often reach further than state law.
Lake Tahoe has some of the strictest local controls in California. Strict engine emission rules apply, and every watercraft must pass an inspection program designed to block invasive species. Boats that fail inspection can be denied launch access. The Sacramento-San Joaquin Delta uses designated slow-speed zones to protect fragile levees from wake erosion. Harbors in areas like Santa Barbara and Monterey enforce buffer zones around docks and marinas.
Noise is also regulated locally. The California Division of Boating and Waterways sets statewide noise standards, and individual counties can impose tighter limits. Some areas enforce curfews on motorized boating during nighttime hours.
How Enforcement Works
Boating laws in California are enforced by the Department of Fish and Wildlife, county sheriffs, harbor patrols, and the U.S. Coast Guard. Unlike a traffic stop, law enforcement does not need probable cause to stop and board your vessel for a routine safety inspection. The U.S. Supreme Court upheld this authority in United States v. Villamonte-Marquez, reasoning that fixed checkpoints are impractical on open water where vessels can move in any direction.16Justia Law. Vessel Searches – Fourth Amendment Assume an officer can check your registration, safety equipment, and sobriety at any time.
Penalties scale with severity. Operating an unregistered vessel or lacking required safety gear draws fines that start around $100. Reckless operation and BUI are misdemeanors carrying fines up to $1,000 and jail time up to six months on a first offense, rising to one year on a repeat.11California Legislative Information. California Harbors and Navigation Code 668 When gross negligence causes serious injury or death, felony charges and state prison time become real possibilities. Vessels can also be impounded, and the consequences for repeat offenders compound quickly.