Tampa Bay is one of the best places in the country to be on the water. Summer weekends here mean boats anchored off Caladesi Island, families running through Boca Ciega Bay, and coolers stocked with White Claws and Modelo. Be careful. Although drinking on a boat is perfectly legal in Florida, operating one while impaired is not.
Under Florida Statute 327.35, boating under the influence (BUI) is a criminal offense. It is not a traffic infraction. It is not a ticket you pay and forget. A BUI arrest can result in jail time, fines, probation, and a permanent criminal record. As a criminal defense attorney in St. Petersburg and a former Assistant Public Defender for Pinellas County, I have seen firsthand how quickly a day on the water can turn into a serious legal situation, and how much early legal involvement can matter.
This post is meant to give you a clear picture of what Florida’s BUI law actually covers, how it differs from a DUI, and what you should do if you or someone you care about has been arrested on the water.
What is Florida’s BUI Law?
Florida Statute 327.35 makes it illegal to operate a vessel on Florida waters while impaired by alcohol or drugs. A “vessel” includes essentially any watercraft used for transportation on water, from motorboats and sailboats to airboats and personal watercraft like jet skis.
The law sets a blood alcohol concentration (BAC) limit of 0.08 percent for adults 21 and older, the same threshold as driving a car. But the statute goes beyond just BAC. An officer can arrest you for BUI even if your BAC is below 0.08 percent, as long as they have reason to believe your normal faculties are impaired. That means alcohol, prescription drugs, over-the-counter medication, or any combination can be the basis for a BUI charge.
For boaters under 21, Florida applies a zero-tolerance rule. Any BAC of 0.02 percent or higher can result in enforcement action. The law also specifically prohibits anyone from operating water skis, a sailboard, or similar devices while impaired, so the statute reaches beyond just the person at the helm.
One thing worth knowing: it is not illegal to drink alcohol while you are on a boat in Florida. The offense is operating the boat while impaired. That distinction matters legally, but it can blur quickly when law enforcement gets involved, especially during the heavy patrol season that runs through summer.
In the Tampa Bay area, BUI enforcement is carried out by the Florida Fish and Wildlife Conservation Commission (FWC), the U.S. Coast Guard in federal waters, the Pinellas County Sheriff’s Office Marine Unit, among others. They run regular patrols throughout the summer (especially around outdoor holidays). Some law enforcement agencies have the authority to conduct vessel safety checks on any boat at any time, with no particular suspicion required, as I’ll explain below.
How BUI Compares to a DUI, and Where the Differences Matter
BUI and DUI share the same BAC threshold and many of the same penalties, and prior convictions for either count against you in future cases for both. A prior DUI can enhance the sentencing on a BUI, and vice versa. The two charges are linked in Florida law in ways that most people do not expect.
That said, there are real differences between the two, and some of them actually work in a defendant’s favor.
The most significant is that a BUI conviction does not result in the automatic suspension of your driver’s license. Your boating privileges may be affected, and your boat may be impounded, but your ability to drive a car is not directly at stake as it is in a DUI case.
Field sobriety testing is also different on the water. Standard roadside tests like the walk-and-turn and one-leg stand were designed for flat, stable ground. On a boat, officers typically use alternative exercises such as the finger-to-nose, palm pat, and finger-count tests. The problem is that the physical environment of boating, sun exposure, wind, wave motion, and the rocking of a vessel can all affect a person’s balance and coordination independently of alcohol. That creates legitimate room to challenge the reliability of field sobriety results in many BUI cases.
Perhaps the biggest practical difference is who has the authority to stop you and why. In a standard traffic stop, police generally need at least reasonable suspicion of a traffic violation before pulling over a vehicle. On the water, this is different…and has changed in the last year. All law enforcement and governmental agencies used to be able to stop any vessel for a safety check without probable cause for anything else, and then board the boat. Last year, Florida law was changed, and FWC and other State law enforcement agencies are not supposed to board a vessel solely for a safety or marine sanitation equipment check. FWC has a program for boaters to apply for a decal that shows they have all the required items.
If a State or Federal law enforcement officer stops and boards your boat, there may be challenges to the stop depending on the reason cited. Once an officer approaches your vessel and detects signs of impairment, a safety check or other reason for a stop can quickly turn into a BUI investigation.
What the Penalties Look Like
A first-offense BUI in Florida is typically a second-degree misdemeanor. Fines range from $500 to $1,000, and a conviction carries up to six months in jail, mandatory probation, 50 hours of community service, and the impoundment of your vessel for 10 days. If your BAC was 0.15 percent or higher, or if there was a passenger under 18 on board, the fines increase and the maximum jail time extends to 9 months.
A second offense within five years carries a minimum of 10 days in jail, higher fines, and a 30-day vessel impoundment. A third BUI within 10 years escalates to a third-degree felony, with a potential prison term of up to 5 years and fines up to $5,000. A fourth offense, regardless of timing, is also a third-degree felony.
If the BUI involves an accident that causes serious bodily injury, the charge becomes a third-degree felony. If someone is killed, it can be charged as a second-degree felony, which carries up to 15 years in prison. These are not outcomes most people anticipate when they head out for a day on the bay.
One procedural note that often catches people off guard: refusing a breath, blood, or urine test during a BUI stop is handled differently than a DUI refusal. In a BUI situation, refusal results in a $500 civil fine, and you must complete 50 community service hours before your boating privileges can be restored. It does not trigger an automatic driver’s license suspension the way a DUI refusal would. If you have recently been through a DUI arrest and want to understand how the two processes compare, my earlier post on the first 10 days after a DUI arrest in St. Petersburg covers that timeline in detail.
If you or a family member was arrested for BUI in Pinellas County or anywhere in the Tampa Bay area, reach out to my office at 727-746-4343 as soon as possible. The steps you take early on have a real impact on where your case ends up.
What to Do Immediately After a BUI Arrest
The same principles that apply after any criminal arrest apply here. Exercise your right to remain silent. Be respectful with officers, but understand that anything you say can and will be used against you in court. This is true on the water just as it is on the road.
Do not volunteer information about how much you had to drink, when you last ate, how long you had been out on the water, or anything else about your condition. Officers are trained to listen carefully during those exchanges, and casual statements can become evidence.
A BUI arrest often includes vessel impoundment, and there may be separate civil consequences related to your boating privileges. Understanding how those administrative and criminal components interact is part of what a defense attorney helps you manage. You can read more about the broader category of traffic and license-related offenses in Florida to get a sense of how these consequences can stack.
Contact an attorney before you speak to law enforcement, insurance representatives, or anyone else about the incident. The earlier you get legal counsel involved, the more options tend to be available.
Can a BUI Charge Be Defended?
Yes, and there are several angles worth examining depending on the facts of your case. I want to be clear that this is legal education, not a promise of any particular result, because every case is different. But BUI charges are not automatically airtight just because someone was arrested.
One of the most common areas to examine is probable cause for the stop or the arrest. There will be a factual inquiry and dissection of how everything happened. Was there a valid reason to stop the boat? Was there a valid reason to board the boat? Was there probable cause to make the arrest? Even though officers can sometimes board a vessel, a full BUI arrest still requires additional probable cause. If that standard was not met, it may be possible to challenge the evidence obtained as a result.
Field sobriety test results can also be contested. As I mentioned earlier, boating conditions, sun exposure, fatigue, wave motion, and the general physical environment on the water can all contribute to performance on balance-based tests in ways unrelated to impairment. Whether the officer who administered those tests was properly trained to conduct them in a marine environment is also a legitimate question.
Breathalyzer and chemical test results can be challenged on grounds of improper administration, calibration issues, or problems with the chain of custody of blood or urine samples. In some cases, identifying who was actually operating the vessel at the time of the alleged offense is genuinely contested, especially on boats with multiple adults on board.
None of this guarantees a specific outcome. But it does mean that a BUI arrest marks the beginning of a legal process, not its end. Having an attorney who understands how these cases move through Pinellas County courts, and who has experience handling criminal charges at this level, puts you in a meaningfully better position to evaluate your options.
Frequently Asked Questions About BUI in Florida
What is the legal BAC limit for boating in Florida?
For adults 21 and older, the legal BAC limit is 0.08 percent, the same as operating a motor vehicle. For anyone under 21, Florida’s zero-tolerance policy applies, and a BAC of 0.02 percent or higher can result in enforcement action. A person can also be arrested for BUI even if their BAC is below the legal limit if an officer believes their normal faculties are impaired.
Is a BUI the same as a DUI in Florida?
They are similar charges with overlapping penalties, but they are governed by different statutes and differ in important ways. A BUI falls under Florida Statute 327.35, while a DUI is covered by Section 316.193. The key practical difference is that a BUI conviction does not automatically suspend your driver’s license. However, prior BUI and DUI convictions count against each other, meaning a past DUI can enhance the penalties on a new BUI charge and vice versa.
Will a BUI charge suspend my driver’s license in Florida?
Not automatically. A BUI conviction affects your boating privileges and can lead to vessel impoundment, but it does not trigger an automatic driver’s license suspension the way a DUI arrest would. That said, if a future DUI charge is filed and a prior BUI is on your record, that prior conviction will factor into sentencing and could accelerate the consequences you face.
Can I drink alcohol on a boat in Florida?
Yes. Florida law allows adults to consume alcohol on a vessel. The offense is operating the vessel while impaired, not drinking while on one. The distinction is important legally, but in practice, it can become complicated quickly if you are the person at the helm when law enforcement arrives.
What happens if I refuse a breath test during a BUI stop in Florida?
Refusing a breath, blood, or urine test during a BUI stop results in a $500 civil penalty. You will also be required to complete 50 community service hours before your boating privileges can be restored. Unlike a DUI refusal, a BUI test refusal does not automatically suspend your driver’s license. The refusal can still be used as evidence in court, however, so it is not a consequence-free decision.
A BUI arrest often comes as a complete shock. The day started out fun, and now you are facing criminal charges, a potential criminal record, and a legal process you did not expect to be part of. That disorientation is completely understandable. What matters most right now is getting clear information and sound legal counsel before you make any decisions about your case.
At Nunnally Law Firm, I represent clients facing criminal charges throughout St. Petersburg, Pinellas County, and the greater Tampa Bay area. If you have been arrested for BUI or have questions about a recent incident on the water, I encourage you to call my office at 727-746-4343 to schedule a free consultation. You can also learn more about my approach to criminal defense in St. Petersburg on our practice area page. The sooner we talk, the more I can do to help.
