You cannot smoke weed on a cruise ship. Every major cruise line bans cannabis in every form, including medical marijuana and CBD, and cruise ships operate under federal and international jurisdiction where cannabis remains illegal regardless of your home state’s laws. Getting caught can mean confiscation, a lifetime ban from the line, removal from the ship at your own expense, foreign prosecution, or federal fines.
What the Cruise Lines Ban
The four biggest lines leave no room for interpretation, and you agree to their conduct policies when you book.
- Royal Caribbean bans all illegal drugs, including marijuana “even if you have a medical license,” and lists confiscation, removal from the ship, denial of future boarding, and referral to law enforcement as consequences.1Royal Caribbean Cruises. What Items Are Prohibited Onboard a Cruise Ship
- Carnival designates every ship a “drug-free zone” and charges $500 per violation for smoking marijuana in an undesignated area, on top of other penalties.2Carnival Cruise Lines. Drug Free Zones
- Norwegian prohibits illegal drugs including marijuana prescribed for medical purposes, drug paraphernalia, and “all products containing CBD, oils, candies, and gummies or any product containing THC.”3Norwegian Cruise Line. Prohibited Items List
- Virgin Voyages prohibits “illegal drugs (including marijuana and CBD, medical or otherwise).”4Virgin Voyages. Embarkation Guide
The ban covers flower, vape cartridges, edibles, tinctures, and CBD gummies. Cruise lines justify the CBD prohibition by pointing to inconsistent legality in foreign ports and the difficulty of distinguishing legal hemp from illegal cannabis at screening. In one widely reported 2023 case, Carnival issued a lifetime ban to a passenger caught boarding with non-THC CBD gummies she used to sleep, telling her in writing she was “permanently banned from all future Carnival cruises.”
Why State Legalization Doesn’t Help You
Cannabis is still a Schedule I controlled substance under federal law.5Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances That classification matters more at sea than on land. Federal criminal law applies inside the “special maritime and territorial jurisdiction of the United States,” which includes vessels owned by U.S. citizens or corporations and vessels documented under U.S. law.6GovInfo. 18 USC 7 – Special Maritime and Territorial Jurisdiction of the United States Defined The Maritime Drug Law Enforcement Act extends U.S. drug jurisdiction further, reaching vessels in U.S. customs waters and even foreign-flagged ships whose flag states consent to enforcement.7Office of the Law Revision Counsel. 46 USC 70502 – Definitions In international waters, the flag state’s laws also apply under international maritime law.8United Nations. UNCLOS Part VII – High Seas
The practical takeaway: somewhere between your home port, international waters, and every port of call, some government’s drug laws apply. None of them care that you bought your product legally in Colorado or California.
How You Get Caught
Cruise lines have made screening a priority. Carnival’s CEO announced in 2023 that the line had deployed narcotics-sniffing dogs at home ports to screen luggage on both routine and random bases, along with additional security personnel on every ship. Other lines run similar programs. U.S. Customs and Border Protection operates at cruise terminals and runs its own inspections separate from the cruise line.
Screening happens at initial boarding and again every time you reboard after a port stop. That second checkpoint is where passengers who buy cannabis at a legal port often get caught trying to bring it back onto the ship.
What Happens If You’re Caught
Cruise Line Enforcement
Royal Caribbean’s guest conduct policy lists the full range: confiscation, intervention by security or law enforcement, confinement to your stateroom or a holding cell, loss of onboard privileges, permanent revocation of loyalty benefits, removal from the ship, and denial of any future booking.9Royal Caribbean Group. Guest Health, Safety, and Conduct Policy Carnival’s $500 fee applies per violation for smoking in an undesignated area.2Carnival Cruise Lines. Drug Free Zones Passengers removed mid-voyage get no refund for the unused portion of the trip and must arrange and pay for their own travel home.
Foreign Ports
Local authorities in the port country have jurisdiction while the ship is docked, and the penalties are real. In 2018, a passenger on Royal Caribbean’s Anthem of the Seas was fined $4,000 by a Bermuda court after customs officers found cannabis in her purse and cabin during boarding. Another passenger caught smoking in his cabin aboard Adventure of the Seas while docked in Barbados received a one-month jail sentence plus $1,750 in combined fines for possession and importation. Bermuda, the Bahamas, and much of the Caribbean impose serious criminal penalties for cannabis possession, and a U.S. embassy has limited ability to intervene.
CBP at U.S. Terminals
Customs and Border Protection treats cruise terminals as federal inspection stations and enforces a zero-tolerance policy. Even a half-gram of marijuana can trigger a $500 civil penalty.10U.S. Customs and Border Protection. Zero Tolerance at the Baltimore Cruise Terminal If you hold Global Entry or NEXUS, a cannabis incident will almost certainly end your membership. CBP has revoked Global Entry for travelers found with as little as two grams of marijuana, on top of the civil fine.11U.S. Customs and Border Protection. Baltimore CBP Reminds Global Entry Members That Marijuana Possession Still Violates Federal Law
Medical Cards Don’t Change Anything
Every major line explicitly rejects medical exemptions. Royal Caribbean’s policy bans marijuana “even if you have a medical license.”1Royal Caribbean Cruises. What Items Are Prohibited Onboard a Cruise Ship Norwegian’s prohibited items list names “Marijuana prescribed for medical purposes” specifically.3Norwegian Cruise Line. Prohibited Items List Federal law recognizes no medical use for Schedule I substances, and the ship operates under federal rules.
If you use cannabis medically, talk to your doctor before the cruise about alternatives. Dronabinol (synthetic THC, sold as Marinol) is a Schedule III drug with recognized medical uses and can be carried aboard with a valid prescription. Bring any prescription medications in their original labeled containers, and declare liquid medications over 3.4 ounces at security.12Transportation Security Administration. What Can I Bring – Medical
If You’re Not a U.S. Citizen
Non-citizens face consequences beyond fines. A non-citizen who admits marijuana possession to a CBP officer at a cruise terminal can be found inadmissible and denied entry to the United States, even if the possession was legal under state law. The State Department states plainly: “Whether a controlled substance is legal under a state law is not relevant to its illegality under federal law.” The inadmissibility ground is generally permanent. A discretionary waiver exists for a single offense involving 30 grams or less of marijuana, but it requires showing the offense occurred more than 15 years ago, that admission wouldn’t harm national welfare, and that the person has been rehabilitated.13U.S. Department of State. 9 FAM 302.4 – Ineligibility Based on Controlled Substances
Green card holders returning from a cruise aren’t insulated either. A lawful permanent resident who admits marijuana use to a border officer on reboarding can be treated as an arriving alien seeking admission, which strips away protections permanent residents ordinarily rely on. Do not discuss past or present marijuana use with CBP officers, and do not carry any cannabis products.
Buying at a Legal Port
Jamaica, parts of Mexico, and some U.S. cruise ports sit in jurisdictions where cannabis is legal or decriminalized. Consuming on shore and hoping the ship won’t notice creates two separate problems. Returning to the ship visibly impaired or smelling of cannabis can trigger the same enforcement actions as being caught with product. And bringing anything back aboard runs you through the reboarding checkpoint, where sniffer dogs don’t distinguish legally purchased cannabis from anything else.
What Removal Actually Costs
Getting removed mid-voyage is expensive in ways passengers rarely think through. The cruise line refunds nothing. You pay for a last-minute international flight home, potentially from a small Caribbean island with limited service. If a foreign court is involved, you pay for legal representation and any fines. Hotel nights while you sort travel come out of your pocket.
Travel insurance won’t cover it. Standard policies exclude losses resulting from illegal drug use, and that exclusion sweeps in the unused fare, the emergency flight, hotels, and legal fees. Passengers have spent thousands of dollars getting home after a cannabis-related removal with no reimbursement from any source.