Can you drink and drive a boat in Australia?

By Trendy Publishing editorial team · Published 15 October 2026 · Sources

A cold one in the esky and a day on the water feel like they go together — but the moment you take the wheel of a boat, the law treats you much like a driver. In most of Australia the skipper of a recreational vessel must stay under 0.05 BAC, the same as the full-licence driving limit. Here's how the rules work state by state and why alcohol is even more dangerous afloat.

The short answer: 0.05 in most states, the same as the road

Each state and territory writes its own marine laws, so there's no single national number — but they land in almost the same place. In every state the person in control of a recreational vessel is held to a blood alcohol limit, and in most of them that limit is under 0.05, matching the general driving limit you already know. The one standout is the Northern Territory, which, according to Royal Life Saving Australia, has no legal BAC limit for boating at all.

Because the detail differs between jurisdictions — and the rules can change — always check your own state or territory's maritime authority before you head out. The figures above are drawn from the NSW Government, Maritime Safety Queensland and Transport WA.

Who the limit applies to

The BAC limit attaches to the person in control of the vessel — the one steering or directing its course, speed or propulsion. That's usually the skipper, but if you hand the wheel to a mate, the limit follows whoever is driving. In a vessel towing a water-skier, the limits also reach the designated observer and the person being towed.

Passengers aren't subject to a numeric limit, but the skipper is legally responsible for everyone on board and, in states like Queensland and Tasmania, must not let an intoxicated person take control. A passenger who has been drinking is also more likely to fall overboard and less able to help if something goes wrong.

Lower and zero limits for some operators

Just as the road has stricter limits for learner and professional drivers, the water has tighter rules for some operators:

• Commercial vessels: NSW sets the limit at under 0.02 for commercial operators, Queensland requires a zero BAC for the master of a Class 1 commercial vessel, and Tasmania sets 0.00 for commercial vessel operators.
• Under-18 skippers: NSW applies a 0.00 limit to anyone under 18 operating any vessel. Not every state has a special youth limit — Tasmania, for example, does not — so again, check locally.

The principle is the same everywhere: the more responsibility you carry for other people, the less alcohol the law allows in your system.

Yes, there's random breath testing on the water

Plenty of boaties assume the open water is a law-free zone. It isn't. Marine police can carry out random breath and drug testing on a vessel that is underway — and in NSW that explicitly includes a boat that is simply drifting. If you're over the limit, police can issue a court attendance notice and a conviction can see your marine licence suspended or cancelled.

Why alcohol hits harder on the water

Drinking impairs a skipper the same way it impairs a driver — slower reactions, poorer judgement, worse coordination — but a boat adds a layer the road doesn't. Sun, glare, wind, engine noise and the constant motion of the hull produce what researchers call boater's hypnosis: fatigue and dulled awareness that set in before the first drink, then compound with every one after it. Alcohol also tends to make people overconfident just as their abilities drop.

The numbers back this up. Royal Life Saving Australia reports that drunk boaters made ten times more errors when changing course than sober ones, and that drinking just two standard drinks almost doubles the risk of most types of injury. People who drink while boating are also less likely to wear a lifejacket — removing the one thing most likely to save them if they end up in the water.

The penalties

Penalties are set by each state and they are not trivial. In Western Australia, a first offence over 0.05 carries a $1,000 infringement or a fine of up to $1,250, rising to $750–$2,250 and a six-month disqualification over 0.08, while operating under the influence and causing death can carry up to 20 years' imprisonment. In Tasmania, courts can impose fines of up to $1,000 and disqualifications of up to 15 months. In Queensland, a conviction involving a recreational vessel can see your marine licence cancelled or suspended. A boating alcohol offence can cost you your marine licence — and in several states can affect your road licence too.

Anchored, moored or drifting — when does it count?

This is where states genuinely differ. In Tasmania and Western Australia the limit generally doesn't apply once a vessel is safely secured, berthed or at anchor. But in NSW breath testing can apply to a drifting boat, and authorities everywhere recommend staying under the limit in case you suddenly need to move. If there's any chance you'll take control, treat yourself as the skipper.

How to enjoy a day on the water safely

• Pick a sober skipper — whoever is driving stays off the alcohol, exactly like a designated driver on land.
• Count your standard drinks. There are no empties lining up on a boat and the sun hides how much you've had, so log each one.
• Match every drink with water — heat and sun dehydrate you fast afloat, which makes alcohol feel stronger.
• Wear your lifejacket. It buys you time if you go overboard, and drinkers are the ones who skip it.
• Save the serious drinking for shore — once the boat is tied up and no one needs to drive it.

Frequently asked questions

Can you drink and drive a boat in Australia?

In most states the skipper must stay under 0.05 BAC — the same as the general driving limit. The Northern Territory has no legal limit, but alcohol is still dangerous afloat, and since the skipper is responsible for everyone aboard, staying sober in control is safest.

What is the alcohol limit for boating in Australia?

Under 0.05 for recreational skippers in most states. Lower or zero limits apply to commercial operators (such as under 0.02 in NSW and zero for a Queensland Class 1 vessel master), and some states apply a zero limit to skippers under 18.

Does the alcohol limit apply to passengers on a boat?

The legal limit applies to the person controlling the vessel, not passengers. But the skipper is responsible for everyone's safety, and alcohol makes passengers more likely to fall overboard and less able to help in an emergency.

Can police breath-test you on the water?

Yes. Police can carry out random breath and drug testing on vessels underway, including while drifting. Being over the limit can cost you your marine licence and, in serious cases, lead to fines and imprisonment.

Does the boating limit apply when anchored or moored?

It depends on the state. In some, such as Tasmania, it doesn't apply when the vessel is safely secured or at anchor — but authorities still recommend staying under the limit in case you need to move, and in NSW testing can apply to a drifting boat.