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Tempe
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Operating Under The Influence Charges in Arizona?
Your Freedom Can't Wait.
While boating DUIs are less common than driving DUI’s, because of the many lakes in Arizona, the lawyers at Matthew Lopez Law, PLLC, have represented countless clients for operating a boat while under the influence of alcohol. Our law firm has found that most people who are arrested for OUI did not consume alcohol with the intent to become impaired. Generally, the boat operator is out on the lake all day, has received significant sun exposure and has not had much else to drink. Under these circumstances, it does not take much alcohol consumption for a person to become impaired.
A day on Lake Havasu or Lake Pleasant can end with handcuffs. Arizona enforces boating under the influence just as aggressively as roadway DUI, and many boaters never see it coming. There is no open-container ban on the water, so people drink freely all day, then get stopped by an Arizona Game and Fish Department warden running a saturation patrol. Those wardens are certified peace officers with full arrest authority, and Arizona runs OUI checkpoints on the water during summer weekends and holidays.
Arizona calls the offense Operating Under the Influence, or OUI, and it is prosecuted under ARS 5-395. Like a roadway DUI, an OUI is a Class 1 misdemeanor that can mean mandatory jail, thousands in fines, and a permanent criminal record. Unlike a roadway DUI, it applies to boats, jet skis, and any motorized watercraft.
Matthew Lopez Law defends boating OUI charges across Arizona, including cases on Lake Havasu and the Colorado River. Contact our firm for a confidential consultation.
Under ARS 5-395, it is unlawful to operate or be in actual physical control of a motorized watercraft that is underway while:
The phrase “impaired to the slightest degree” means you can be charged even below 0.08 if alcohol affected your ability to operate safely. Sun, heat, and dehydration can amplify alcohol’s effects on the water, which is one reason boaters test higher than they expect.
OUI applies only to a motorized watercraft that is “underway.” A vessel that is anchored, moored, or aground is not underway. This is a meaningful distinction. A boat drifting with the engine off, tied to a buoy, or beached on a sandbar may fall outside the statute. When the state cannot prove the watercraft was underway, the OUI charge itself is in question. This gives responsible boaters who stop and anchor before drinking a genuine defense that roadway drivers do not have.
OUI is a Class 1 misdemeanor. First-offense penalties parallel a roadway DUI and include a minimum fine of $1,250 plus surcharges, mandatory jail, alcohol screening, and treatment as directed.
| Offense | BAC | First-Offense Penalties |
| Standard OUI | 0.08-0.149 | Minimum $1,250 fine, mandatory jail, screening and treatment |
| Extreme OUI | 0.15-0.199 | Increased mandatory jail and higher fines |
| Super Extreme OUI | 0.20+ | Highest mandatory jail and fines |
The tiered structure comes from ARS 5-395.01, which sets classifications and sentencing, and the extreme thresholds under ARS 5-397. Penalties escalate with prior OUI convictions in the previous 84 months, mirroring the roadway repeat-offense structure.
Under ARS 5-396, an OUI becomes an aggravated felony offense when the operator:
Aggravated OUI carries the possibility of prison time and, under ARS 5-396.01, forfeiture of the watercraft itself. Losing the boat on top of a felony conviction makes these among the most serious offenses on the water.
Arizona’s boating implied consent law works like the roadway version. Under ARS 5-395.03, operating a motorized watercraft means you have consented to chemical testing if lawfully arrested for OUI. Refusing triggers civil consequences, and officers can seek a warrant to compel a blood draw. Evidence of a refusal is admissible in court. A preliminary breath test may be offered under ARS 5-395.04, similar to the roadside PBT for drivers.
One key difference: an OUI does not automatically suspend your car driver license the way a roadway DUI does, because boating privileges and driving privileges are separate. The OUI still creates a criminal record and counts as a prior for 84 months.
Most Arizona OUI arrests come from:
The stop. Game and Fish wardens still need a lawful basis to stop and detain a boater. An unjustified stop can suppress the resulting evidence.
The “underway” element. If the watercraft was anchored, moored, or aground, it may not have been underway, defeating a core element of the offense.
Field sobriety tests on water. Standardized field sobriety tests were designed for dry, level roadsides. Sun exposure, dehydration, fatigue, “boater’s hypnosis,” a rocking dock, and sea legs all distort performance and undermine reliability.
Breath and blood testing. The same challenges that apply to roadway testing apply here: calibration, observation period, warrant requirements, chain of custody, and the two-hour window.
Rising BAC. A long day of intermittent drinking can leave a boater still absorbing alcohol at the time of testing, meaning the operating-time BAC was lower than the tested number.
Reduction. Where the evidence is weak, negotiation toward a reduced charge can avoid the mandatory OUI jail and the 84-month prior.
Boating OUI carries the same mandatory penalties as roadway DUI, but with unique defenses tied to the “underway” requirement and the difficulty of running field sobriety tests on the water. Because these cases often arise far from home over a holiday weekend, early legal help is especially important.
We serve clients in Tempe, Mesa, Apache Junction, Lake Havasu, Parker, and statewide. Payment plans available. Every interaction confidential.
Contact us for a free consultation.
Every minute counts when you’re facing criminal charges in Arizona. Whether you were just arrested or have court next week, our team is ready to start building your defense right now. We offer free consultations and can start protecting your rights today with flexible payment plans that work for your budget.
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