How BWI Works in Texas — and Why It's Easier to Get Charged
Under Texas Penal Code §49.06, operating a watercraft while intoxicated is a crime with the same penalty ladder as DWI: a Class B misdemeanor first offense (72 hours to 180 days in jail, up to $2,000 fine), Class A with a prior, and felony exposure for a third offense, serious injury (intoxication assault), or death (intoxication manslaughter). BWI and DWI priors stack together — a BWI conviction today makes a future DWI a second offense.
What makes BWI different is the stop: game wardens and marine patrol may board any vessel for a “water safety check” without reasonable suspicion — no bad driving required. Add sun, heat, dehydration, wave motion, and hours on the water, and the standard field sobriety tests become even less reliable than they are on land. Those two facts define both the risk and the defense.
Water safety checks let wardens board and inspect any vessel. But the scope of the check has limits — exceeding them can make everything after the boarding suppressible.
NHTSA's tests were validated on dry, level ground. Texas uses 'seated battery' tests on the water — with far weaker scientific support that a defense expert can dismantle.
Sun exposure, dehydration, wind, and 'sea legs' after hours on a rocking deck produce the exact symptoms officers list as intoxication cues: red eyes, unsteady balance, flushed face.
Refusing a breath or blood test after a BWI arrest triggers driver's license suspension under Texas implied-consent law — and the same 15-day ALR deadline applies.
Three Things About BWI Most People Don't Expect
Federal waters are closer than they sound. Galveston Bay's ship channel and other federally-navigable waterways fall under concurrent U.S. Coast Guard jurisdiction, meaning a BWI incident there can potentially draw federal as well as state involvement — not just the county-level charge most boaters expect.
The rules are stricter for boaters under 21. Texas applies the same zero-tolerance standard to underage boating that it applies to underage driving — any detectable alcohol, not just a 0.08+ BAC, exposes a boater under 21 to a charge, mirroring underage DWI law rather than the adult BWI standard above.
There's no boating equivalent of an occupational driver's license. A driver whose license is suspended after a DWI has a path to limited driving privileges through an ODL — there is no comparable restricted-privilege process for a suspended boating privilege after a BWI, which is a meaningful practical difference from the DWI side of this firm's practice that boaters often assume works the same way.
Where BWI Cases Happen Around Houston
Enforcement concentrates where Houston boats: Lake Conroe (Montgomery County — a year-round No Refusal county), Clear Lake and Galveston Bay (Kemah, Seabrook, League City), Lake Houston, and the San Jacinto River. Summer weekends, Memorial Day, July 4th, and Labor Day bring saturation patrols by Texas Parks & Wildlife game wardens, sheriff's marine units, and the Coast Guard. Cases are filed in the county where the water sits — Herman practices in Harris, Montgomery, Galveston, and Fort Bend County courts. If your arrest was on Lake Conroe, see the Montgomery County DWI page; for summer prevention tips, see how to avoid a BWI.
BWI — Boating While Intoxicated Questions
Yes — identical penalty ranges, and the convictions cross-count: a BWI prior enhances a later DWI to a second offense and vice versa. A BWI also triggers the same license-suspension machinery if you refused testing. Treat a BWI arrest with exactly the seriousness of a DWI arrest.
For a water safety check, yes — no reasonable suspicion is required to board and check registration, life jackets, and equipment. But the check has legal limits: it is not a roving license to interrogate and run sobriety tests without developing actual signs of intoxication. Where wardens blur that line, suppression becomes possible.
No. Like roadside FSTs, the seated battery is voluntary — and politely declining deprives the State of its most subjective 'evidence.' The seated tests (finger-to-nose, palm pat, hand coordination) have far weaker validation than even the roadside tests, which is a powerful cross-examination theme at trial.
Refusing a breath or blood test after a BWI arrest triggers an ALR driver's-license suspension under Texas implied-consent law — the same 15-day deadline to request a hearing applies. Yes, an arrest on the water can cost you your license on the road; request the hearing immediately.
Passengers can; Texas has no open-container ban on boats. The operator commits BWI only when intoxicated — .08 BAC or loss of normal faculties. That gap between 'drinking' and 'intoxicated' is where many BWI cases are fought, since wardens often treat the presence of alcohol as proof of impairment.
A boating accident with serious bodily injury becomes intoxication assault (third-degree felony); a death becomes intoxication manslaughter (second-degree). These cases add reconstruction experts, maritime factors, and causation defenses — call immediately, before speaking to investigators.
Related Pages
Montgomery County DWI, Breath & Blood Test Defense, Field Sobriety Tests, ALR Hearings