Packing for a day cruise sits somewhere between a beach day and a flight, and most people get it wrong in the same direction. They bring far too much of the wrong thing, then carry it around two island ports in the heat. Here is what to pack for a day cruise from Athens, and more usefully, what to leave in the hotel.
Quick answer
Essentials: swimwear, sunscreen, a hat, sunglasses, a towel, and sandals or flip-flops.
The one people forget: a light layer for the return leg. Late afternoon at sea is cooler than late afternoon in Athens.
Optional: goggles or snorkeling gear, an action camera, a change of clothes. Everything else is probably already on board.
What smart packing means at sea
A beach day forgives you. If you forget something, the car is a five minute walk away. A day cruise runs nine hours, and what you brought at 09:30 is what you have until 18:30.
That sounds like an argument for packing more. It is the opposite. Two of the stops put you ashore on your feet, at Agistri and later at Aegina, and every extra item becomes something you carry through a port town in the afternoon sun. Meanwhile the ship itself covers most of what a beach cannot.
So the rule is simple. Pack for the water and the walk, and let the boat handle the rest. One small bag per person is the target, not one each of everything.
One thing that belongs in that bag regardless: the ID or passport you booked with. Greek port regulations require passenger details for every sailing, so keep the document on you rather than in the hotel safe.
The six things you actually need
Swimwear, ideally already on
Wear it under your clothes when you board. The swim stop at the islet of Metopi lasts 40 minutes, and the people who spend the first ten of those queuing to change are the ones who wish they had not.
If you would rather change on board, restrooms are available on every deck. It is a preference, not a problem. Just decide before you leave the hotel.
Sunscreen, stronger than you think
This is the single most underpacked item on any boat. Water reflects sunlight back at you, so you are lit from above and below at once, and the sea breeze removes the discomfort that would normally tell you to move into the shade.
Bring a higher SPF than you would use on land, choose a reef-safe formula, and reapply after every swim. A morning application will not survive a 40-minute swim stop and an afternoon on deck.
A towel that dries
A quick-dry microfiber towel folds to nothing and is dry again by the time you go ashore. A hotel bath towel is the classic mistake, since it stays wet all day and doubles the weight of your bag.
Outdoor showers are available on deck for rinsing the salt off, which makes the towel work harder than you expect.
A layer for the ride home
Here is the item nobody packs and everybody wants. The return leg runs into the early evening with the ship moving and the wind picking up, and skin that has been in salt water all day loses heat quickly.
A light hoodie, a linen shirt or a sarong is enough. It weighs almost nothing and it turns the last stretch of the day from something you endure into the best part of it.
Sunglasses and a hat that survives wind
Glare off open water is a different order of magnitude from glare on a street. Polarized lenses genuinely help, and they make the seabed visible at the swim stop.
For the hat, choose one with a strap or a snug fit. A wide brim is excellent at anchor and a liability at cruising speed, and every crew in Greece has stories about hats last seen heading toward Aegina without their owner.
A small waterproof pouch
Phone, cash, room key. During the swim stop these need somewhere dry that is also somewhere you can see, and a zip pouch on a lanyard solves it for a couple of euros.
What is already on board
Most over-packing comes from assuming a boat is a beach with worse facilities. On a purpose-built day cruise ship it is the other way around.
Sun loungers, bean bags and shaded areas are spread across the decks, so the beach umbrella and the folding chair can stay behind. Swim noodles and inflatable water toys are provided at the swim stop. Outdoor showers and restrooms are available on board.
Food and drink are handled too. A chef prepares a fresh Mediterranean buffet on board, and complimentary still water, soft drinks, filter coffee and house wine are served from boarding to docking. Cocktails, beer and spirits are available to purchase from the bar, so there is little reason to bring a cooler. If you are weighing up the two ticket options, our guide to Popular vs VIP covers what changes between them.
The mistakes people make
Over-packing is the big one, and it punishes you twice. You carry it up the gangway in the morning, then you carry it through Agistri and Aegina in the afternoon while everyone else walks around with a phone and a hat.
Forgetting to reapply sunscreen is the second, and the most regretted. Set a reminder for after the swim stop if that is the kind of thing you forget.
Footwear is the quiet third. Sandals or flip-flops are ideal, since they come off easily for swimming and grip a wet deck. Heels and heavy shoes make boarding awkward and spend the rest of the day in your bag.
Packing with children
Bring your own life jackets for children and infants. A familiar, correctly sized jacket is the one that actually gets worn by a nervous four year old.
Pack snacks and formula for the youngest passengers. There is a full buffet on board, and a toddler on their own schedule rarely cares.
Waterproof toys are optional and useful, but keep them small. Swim noodles are already provided, and the inflatable flamingo is more trouble than it is worth on a gangway.
Pack light, swim more
The best-packed guests on any day cruise look almost unprepared. A small bag, a towel, sunscreen and something warm for later, because they worked out that the ship is carrying everything else.
Athens Swimming Cruise departs at 09:30 from Private Marina Delta Kallithea and returns to the same marina at 18:30, with time ashore at Agistri, an anchored swim stop at Metopi, and two hours at Aegina in between. Three decks, a swim platform and a water slide, and no reason to carry anything you will not use.
If you are still deciding whether a day at sea belongs in your trip, start with our guide to day trips from Athens by sea, or the case for the best day trip from Athens for first-time visitors.
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