Cruising with Type 1 Diabetes: The Pump and CGM Playbook (2026)

I have had type 1 diabetes for 20 years and I wear a pump, so the device questions below are answered the way I would answer them for myself. The cruise logistics come from the cruise lines' own published policies, linked as we go. As always: this is general guidance, not medical advice. Your care team owns your plan.

Embarkation security: the one checkpoint

Forget the airport routine. At the cruise port there is one checkpoint, and it is simpler. Your bags ride through an X-ray machine. Royal Caribbean's own FAQ describes them as similar to the ones at airport security checkpoints. You walk through a walk-through metal detector. That is the whole screening.

The metal detector is the easy part. Every major pump and CGM (continuous glucose monitor) manufacturer clears their worn devices for walk-through metal detectors. Keep your pod and sensor on and walk through. No pat-down, no tray, no conversation required.

Your spare supplies follow baggage rules, because they ride the belt with your carry-on. The device-by-device answers, from the manufacturers' own guides: Dexcom G7 spares are safe through luggage X-ray. Dexcom G6, Omnipod 5, Tandem, and Medtronic spares should not go through the X-ray, so ask the officer for a hand inspection. If you are unsure about anything in your bag, ask for a visual inspection. It is always an option.

Two port-day rules from the cruise lines themselves. First, hand-carry every diabetes supply. Carnival's special-requirements form says it plainly: hand-carry medical equipment and medications, and do not pack them with checked luggage. Checked cruise luggage can take hours to reach your cabin, and you need your supplies at boarding, not at dinner. Second, Royal Caribbean advises keeping all medications in their original labeled prescription containers, and packing at least three days of extra medication in case the itinerary changes. My own rule is stricter and simpler: pack 20% more than the trip math says. That covers the three-day rule and then some.

One more embarkation note: if you travel with injectable medications and need a sharps container, Carnival says to ask the Housekeeping team once onboard. Do it on day one.

The cabin fridge trap

This is the section that ruins trips, so read it twice. That little cooler in your stateroom is not a refrigerator. Carnival's official guidance says stateroom mini-bars are designed to maintain the temperature of beverages, and tells guests not to use the mini-bar to store medications with specific temperature requirements. Insulin has specific temperature requirements.

Here is what to do instead. Before you sail, request a medical-grade portable refrigerator through the cruise line's special-needs process. They are available in limited quantities on a first-come, first-serve basis, so early matters. If none is available, the ship's Medical Center will arrange storage for your medication once onboard. Do not improvise with the minibar.

The temperature numbers, so you know what you are protecting: unopened insulin belongs in the fridge at 36 to 46F. In-use insulin is fine at room temperature up to about 77F. Frozen insulin, at 32F, must be discarded. None of that survives a beverage cooler that drifts with the cabin temperature. For port days and excursions, a FRIO cooling wallet keeps insulin at safe temperatures for 45+ hours with no ice and no electricity. That is what lives in my day bag.

Pool, hot tubs, and shore excursions

Cruises are water trips, so here are the waterproof numbers that matter. The Omnipod 5 pod carries an IP28 rating: waterproof to 25 feet for 60 minutes. The Omnipod 5 Controller is not waterproof, so it stays in the cabin while you swim. The Dexcom G7 sensor is water-resistant and may be submerged under eight feet of water for up to 24 hours when properly installed.

Waterproof is not the same as stuck-on. Salt water, chlorine, sunscreen, and long pool days all loosen adhesive. Pack extra overpatches and press the sensor and pod edges down firmly after every swim. If a pod edge is lifting on day three of a seven-day sailing, replace the overpatch early rather than nursing it.

Your shore-excursion kit is the same day-pack logic as any travel day, tuned for heat and distance from the ship. Sugar packets are my low treatment: one packet at 60 to 70, two below 60, and I grab extras at every coffee shop. Fast-acting carbs within arm's reach, your medical ID on your wrist, and your CGM low alarm loud. Excursion lows are ordinary lows; the only thing different is that the ship leaves without you, so treat early.

Dining rooms and buffets

Royal Caribbean lists diabetic diets among the special diets it can accommodate onboard. The fine print matters: requests must be made in advance of sailing in writing, they apply to the main restaurant only, and the line says it will endeavor to accommodate reasonable requests without guaranteeing it. So make the request, and still eat like an adult who knows their own patterns.

My travel eating routine works at sea exactly as it works on land. A low-carb, high-protein breakfast stabilizes the day, and I order protein-first for the rest of the day. Buffets reward the same discipline as hotel breakfasts: scan the whole line before you take a plate. For the big dining-room dinner, pre-bolus the way you do at home. I do mine without a timer and it works fine.

Seasickness and sick days at sea

Motion sickness is a diabetes problem, not just a comfort problem. Vomiting with type 1 diabetes is a ketone situation. The ADA recommends testing for ketones every four to six hours when you are sick, and lists nausea and vomiting among the warning signs of diabetic ketoacidosis. Pack ketone strips in your day bag next to the sugar packets, and treat a rough sea day like a sick day at home: keep taking your insulin, keep fluids going, and check ketones.

Bring whatever motion-sickness remedy works for you at home. The ship's shop sells them too, usually at ship prices, which is its own argument for packing your own.

If something goes wrong at sea

Every large ship has a medical center, and it bills at private rates. That is the entire argument for sorting travel insurance before you sail: our travel insurance guide for type 1 diabetes covers what to declare and the evacuation coverage minimums to look for. Buy it before final payment if you can, not at the gangway.

The rest of the emergency plan is boring on purpose. Prescription copies live in your phone. Your 20% extra supplies mean a failed pod or a lost sensor is an inconvenience, not a crisis. Pump users: keep your basal rates written down somewhere that is not the pump, and pack syringes and a vial as backup. The ship cannot replace your devices, but with spares and a plan, it does not have to.

Time zones at sea

Transatlantic and repositioning sailings drift through several time zones over the course of the trip, usually in small daily steps as the captain adjusts ship time. The framework is the same one in our time zone insulin guide: pump users switch the pump clock to local time, long-acting insulin follows home time on travel days and local time on arrival, and dose amounts stay with your care team. Run the full route through our free time zone planner before you sail.

Cruise checklist

Here is the full list, in this order: