Snorkelling looks like the simplest water sport there is: a mask, a tube, a pair of fins and a warm sea. Then you arrive at the beach and discover that the mask strap has taken a bite out of the silicone skirt, the sunscreen has smeared across the camera lens, the car keys are somewhere in a damp towel and the phone, the one thing you promised yourself you would not take into the water, is sitting in sand next to a puddle of seawater. 🤿
Almost nothing that goes wrong on a snorkelling holiday is dramatic. It is a long list of small, avoidable losses: a scratched lens, a flooded action camera, a swollen battery, a key fob that stops working after one dip, a wallet that dries into a lump. This guide walks through ten of them in the order a trip actually unfolds (packing, getting to the water, being in it, and coming home), and for each one it says what really happens and what to do about it. It is written for the 2026/27 winter-sun season, when many Europeans fly to the Red Sea, the Canary Islands, the Maldives, Thailand or the Caribbean for a week of reef-gazing, but nothing here depends on a particular destination.
One note on sources: rules about marine parks, sunscreen and fees change often and are enforced differently from one place to the next. Where this article mentions them, treat them as examples of the kind of rule you may meet, and check the current local rules for your own dates before you travel.
Part 1: Packing and getting there
1. The mask that arrives scratched, bent or smelling of everything else in the suitcase
A snorkel mask is a surprisingly delicate object. The lens is usually tempered glass, which resists scratches better than plastic but is far from immune, and the silicone skirt is what actually keeps water out. If the skirt spends two weeks folded against a hard corner of a suitcase, it can take a set. The mask then leaks on the first morning and you spend your holiday clearing it every few minutes.
The common mistakes are predictable. Buyers pack the mask loose between clothes, where a zip, a bottle or a pair of sunglasses can press on the glass. They fold the strap over the lens so the buckles rest against it. They leave a wet mask in a closed bag for the return flight, and silicone that stays damp and warm picks up odours from sunscreen and neoprene very quickly.
What works: rinse in fresh water, dry it completely and store it with nothing pressing on the skirt. Put it in a rigid shell, either the manufacturer's box or a small hard case, and keep the snorkel beside it instead of coiled over it. If you travel with a prescription or a very good mask, take it in your cabin bag, not in the hold. Keep a spare strap; they are light and cheap, and a snapped strap on day one is a classic way to lose an afternoon.
A small tip from people who guide beginners: never use toothpaste or a lighter to "clean" a new mask without reading the manufacturer's instructions for that exact model. The coating on the glass is the reason it does not fog as much as a cheap one, and aggressive treatments can wear it down.
2. The phone, keys and cards that go to the beach in a pocket
The most common loss on a snorkelling day is not a piece of snorkelling gear at all. It is the stuff you brought to the beach: phone, hotel key card, car key, a little cash, a credit card. Every one of those items dislikes salt water and fine sand, and they all end up in one place, usually the bottom of a bag or the pocket of a pair of shorts that you are about to wear into the sea.
Car keys are the real casualty. A modern key fob is a sealed plastic shell with a battery and a radio chip. It might survive a brief splash, but a dunk in the sea, followed by a drying session in the sun, is a common route to a dead fob and a rental-company call. Hotel key cards with magnetic strips or NFC chips fare no better once they have been wet and bent.
The solution is boring and works: give those items one hard, sealed home. A small waterproof micro case keeps phone, key and cards together, floats or sits in the shade, and goes in the beach bag instead of in a pocket. Dry bags are fine for keeping things damp-free on a boat, but a rigid case also protects against being sat on, kicked, buried in sand and crushed under a cooler. If you are unsure which suits your day, our comparison of when a waterproof case beats a dry bag, and when it does not sets out nine concrete situations.
Look at what the label actually promises. IP67 means the enclosure has been tested against dust and against temporary immersion, in the standard definition up to one metre for thirty minutes. That is a rating for drops in the shallows and a dunked beach bag, not a diving rating. Our explainer on what IP67 means for a Peli case goes through the difference between waterproof, water-resistant and submersible, which is worth reading before you trust any case with a phone at depth.
3. The action camera, spare batteries and memory cards that get dumped in a bag
Action cameras are sold as tough, and many of them are, but the things around them are not. Spare batteries rattle against coins and keys. Memory cards sit loose in a pocket and take a trip through the washing machine. The little rubber door on the camera body collects a grain of sand, and the next time you shut it, it does not seal.
The simplest habit is a dedicated small case for everything that is not on the camera: two spare batteries in their sleeves, a card wallet, a lens cloth, a short cable and the charger. When the case is open on a towel, the card you took out is the card that goes back, because there is only one place for it. Label full cards, and never put a card that has not been backed up back into the camera for another dive.
Batteries need care. Lithium-ion cells dislike heat and physical damage. Do not leave them in a parked car, do not carry them loose with metal items, and take them in your cabin luggage when flying; airline rules treat spare lithium batteries as cabin items, and the exact limits differ by airline, so check the carrier's page before you go. A case with a snug foam cut-out for the camera and a lid you can close with one hand is better than a padded pouch, because it stops the lens from pressing on anything.
Grab & go: small Peli cases for the beach bag 🏖️
Part 2: On the beach and on the boat
4. Sunscreen: on your skin, on the lens, and (sometimes) against the rules
Sunscreen causes trouble in three separate ways on a snorkelling trip. First, it gets onto your hands, and from your hands onto the camera lens, the mask glass and the screen of the phone. A greasy smear on the inside of a mask makes it fog constantly; a film on a dome port ruins a photo that you will not notice until you are back at the hotel. Second, it softens and marks some plastics and rubbers, so a case or a mask strap that spends the week coated in lotion ages faster than one kept clean. Third, in some places it is a legal matter.
A number of destinations restrict sunscreens containing certain chemical filters because of concerns about coral. Reporting at the time of writing indicates that Palau started restricting a list of ingredients in 2020, that Hawaii banned the sale of products with oxybenzone and octinoxate from January 2021, and that Thailand restricts several ingredients inside its national marine parks, with fines possible. Sources disagree on some details, such as exact start dates and how strictly each rule is applied, so check the current rule for the exact park or island you plan to visit. The practical answer in most cases is the same: pick a water-resistant mineral product, apply it well before you get in the water so that it has time to bind to your skin, and wear a rash vest or leggings so you need less of it.
Habits that save your kit: put sunscreen on before you handle any gear, wash your hands before you touch the mask or camera, and carry a microfibre cloth in a sealed pocket of your case so the first thing you do with a lens is wipe it, not smear it. Never apply cream to the inside of a mask, and never wipe the glass with a dry, sandy finger.
5. Heat: the hot car, the sunny boat deck and the black bag in the sun
Heat wrecks more snorkelling gear than saltwater does, mostly because nobody thinks of it as a hazard. A closed car in the sun can become far hotter inside than the air outside, and it is a poor place for a phone, a camera, a battery or a tube of lotion. A dark bag on a boat deck, with no shade, does the same job. Heat shortens battery life, can cause a swollen cell, softens adhesive that holds camera housings together, and bends the foam in a mask or a fin pocket.
It also has a slower side effect: thermal shock. A warm camera that you drop into cool water will fog on the inside if there is any moisture trapped in the housing, which is why experienced underwater photographers close their housings in a dry, shaded place and not in a humid boat cabin. If you notice fogging, do not keep dunking it. Get it out of the sun, open it away from spray and let it dry before trying again.
Plan for shade: a pale-coloured towel over the gear, a cooler lid that doubles as a shelf, a case in the footwell and not on the dashboard. A white or light-coloured hard case reflects more sun than a black one, and a closed hard case with a good lid keeps the interior closer to the surrounding temperature for longer. Never leave electronics in a parked car if you can avoid it, and never charge a battery that has been sitting in the sun until it has cooled.
6. Sand in the zips, hinges and O-rings
Sand is the quiet enemy. It gets into dry bag roll-tops, into zips, into the mask strap buckle and into the one place where it matters most: the seal of whatever is supposed to keep water out. A single grain on an O-ring or a gasket is enough to create a path for a drop of water, and a drop is enough to ruin a phone.
The routine is simple and takes half a minute. Before you close any waterproof container, look at the seal, wipe it with a clean, lint-free cloth, check for hair, sand or lint, and then close it. After a day of use, rinse the outside under fresh water, open it in a clean spot and let it dry before you store it. On a hard case, the latches and the pressure valve, where fitted, also benefit from a quick rinse. Do not use oils or solvents on a seal unless the manufacturer says to, because some lubricants attract sand and others can damage the rubber.
If you are travelling for more than a few days, pack a small cloth, a spare seal if one is available for your model, and a sealed bag for wet items so that sandy neoprene and a clean phone case never share a pocket. An O-ring is a wearing part, not a lifetime component, and replacing a worn one before a trip is far cheaper than finding out on the beach that it has flattened.
7. The boat trip: spray, wet decks and cash in the wrong pocket
Many snorkelling holidays include at least one boat day, and boats are hard on gear. Decks are wet. Space is tight. Bags get stepped on, spray goes everywhere, and everyone is climbing in and out with wet hands and dripping gear. A phone left on a bench is a phone that ends up in the bilge.
Cash is a surprisingly common issue. In some destinations, boat operators or local authorities ask for small fees to be paid in cash at the marina or on the day; one operator in Sharm el-Sheikh, for example, advertised a per-person marine fee of 10 US dollars payable in cash from December 2025. Whether a similar fee applies to your trip depends on the operator and the protected area, so ask when you book. If you are going to carry cash, a rigid, sealed case is a far better home than a plastic bag, which tears, and than a pocket, which gets wet. Put a small, clearly labelled amount in a separate compartment from your card.
For your own comfort, take only what you need for the day. Wear your valuables on a leash or a lanyard if you must, but keep the case on board and close to the centre of the boat. Ask the crew where dry storage is; a good operator will have a locked box or shelf for guests' belongings. And never hand a phone to someone in the water: the exchange between a boat ladder and a swimmer is the classic moment when something slips.
Bigger boxes for cameras, masks and the whole day kit 🎒
Part 3: In the water
8. Things that go overboard: floating nothing, sinking everything
If it can come loose in the water, it will. Snorkellers lose sunglasses, GoPros, car keys on lanyards, hats, fins that were not strapped on properly and even phones in waterproof pouches that were not closed correctly. The sea has a strict rule: anything that is not attached sinks, and anything that floats drifts away faster than you can swim.
The fix is a short list of habits. Fit a wrist strap or a floating handle to every camera. Never leave a phone in a pouch you have not tested by closing it empty and pushing it under water first. Use fins with secure straps or fit a keeper. Keep sunglasses and hats on the boat or beach. If you are on a boat day, avoid carrying anything you cannot afford to lose on the swimming platform, because that is where most items fall in.
Visibility matters for you, too. The British Sub-Aqua Club advises that snorkel vests, which provide buoyancy and a high-visibility shape, are an important part of safe snorkelling and should be worn for open-water snorkelling; a brightly coloured vest or tow float also makes you easier to spot for boats. Whatever you decide, keep your inflation mechanism clean and tested, and treat a surface marker or float as a safety item, not an accessory. If you are new to open water or travelling with children, join a guided group the first time, and read our guide to a first dive course to see what other beginners tend to lose in their first week.
9. The flooded housing, the fogged dome and the scratched lens
Underwater photography is where small mistakes become expensive. Most flooded housings fail at the seal, and the cause is nearly always a hair, a speck of sand or a seal that was not fitted flat. A mistake on a Tuesday morning can end a week's worth of pictures. Fogging usually comes from trapped humidity, which is why experts close their housings in a dry room, not on a humid boat.
Scratches usually come from the places photographers feel safest: a camera set down on the sand, a dome rubbed with a dry cloth, a lens cap that has gone missing. Rinse the housing in fresh water before you open it. Dry your hands first. Use a clean, damp microfibre cloth and not the corner of a towel. Store the housing open once it is dry, and pack the camera in a rigid case with a cut-out foam, not loose in a bag.
The short version for snorkellers is this: a camera that has spent a day in the sea needs a calm, clean place to rest at the end of it. A snug case with foam does that job better than any bag. Bear in mind that the sea itself is an environment where you should keep your hands to yourself. Official guidance for marine protectorates, for example in Egypt, asks visitors not to touch or break coral, not to stand or walk on the reef and not to feed fish. Camera arms, fins and tripods should stay clear of the reef too.
10. Coming home: salt crystals, damp neoprene and the sealed bag nobody opens
The last mistake is made on the last evening. After a week of use, everything is wet, salty and sandy, and the easiest thing to do is to stuff it all into a bag and zip it up. Salt stays in the fibres of a rash vest, in the hinges of a case, under the rubber of a snorkel purge valve and in the buckle of every strap. A wet mask in a closed bag grows smells within a day, and a battery that was packed hot can swell in a hold that is cold.
Make a rinse routine part of the last day. Rinse masks, snorkels, fins and housings in fresh water; soak them if you can; dry everything out of the sun; and only pack it once it is dry to the touch. Wash neoprene and rash vests with fresh water and hang them in the shade. Wipe each case and let its lid stand open for an hour so that no moisture gets sealed in. Pack batteries in your hand luggage, because the cabin is warmer and more controlled than the hold.
At home, give the kit a second look. Check the strap buckles, the mask skirt, the snorkel mouthpiece and the O-rings. Replace anything that has gone stiff, cracked or sticky. If a case has seen a lot of salt, a rinse in fresh water and an hour on a windowsill is a cheap form of insurance for the next trip. It is also a good moment to plan where you want to go next: our guide to the best diving destinations in Europe has many places where the surface is as good as the depths, and our overview of winter water adventures covers what to do when the sea turns cold.
The quick checklist: one case, one routine
If you only remember one page of this article, make it this one. Print it, photograph it, or copy it into your phone before you leave.
- Before you go: check local park, sunscreen and fee rules for your dates; buy mineral sunscreen; test the mask fit at home; pack a spare strap and a lens cloth.
- Packing: mask and snorkel in a rigid shell; camera, batteries and cards in a dedicated case; spare lithium batteries in the cabin bag; a small sealed bag for wet items.
- At the beach: one sealed micro case for phone, keys and cards; sunscreen first, gear second; keep everything in the shade.
- On the boat: cash in a sealed case, valuables in the centre of the boat, nothing loose on the swimming platform.
- In the water: straps and leashes on everything; a high-visibility vest or float; hands off the reef.
- After the dive: rinse in fresh water, dry in the shade, check seals, leave lids open for an hour before packing.
Frequently asked questions
Can I take my phone snorkelling in a waterproof case?
Many people do, but treat it as a calculated risk, not a guarantee. A case or pouch with an IP67-type rating is tested for temporary immersion, not for use at depth, and a speck of sand on the seal is enough to let water in. Test any pouch empty first, keep your phone in a case when you are not using it for photos, and consider leaving it on the shore or boat if you can.
Is a hard case better than a dry bag for snorkelling?
They solve different problems. A dry bag is light and keeps water out; a hard case also protects from being crushed, sat on or buried in sand. For keys, phone and cards, a small hard case is usually the better choice. For a wet towel and a change of clothes, a dry bag is fine.
Which sunscreen should I use when snorkelling?
Check the rules of the destination first, since some places restrict certain chemical filters and rules change. In general, a water-resistant mineral sunscreen, applied well before you enter the water, plus a rash vest or leggings, is a sensible low-impact choice. If you are in doubt, ask your hotel or tour operator.
Should I wear a snorkel vest?
Safety organisations such as the British Sub-Aqua Club recommend vests for open-water snorkelling because they add buoyancy and make you easier to see. If you are a weaker swimmer, travelling with children or snorkelling in currents or boat traffic, a vest or float is a strong option. Check the inflation mechanism before every trip.
How do I stop my mask fogging?
Start with a clean mask, avoid touching the inside of the glass with sunscreen-covered fingers, and use a mask defogger or a drop of baby shampoo, rinsed lightly, as many guides suggest. Keep the mask out of the sun between swims. If a mask fogs constantly even after careful cleaning, it may have a leaking skirt, which is a sign it needs replacing.
One last thing before you pack
A snorkelling holiday should be about the colour of a reef at 3 metres, not about a dead key fob. Give every important item a proper home, keep the sand out of the seals, rinse everything on the last day, and you will come back with the same kit and the same pictures you took. If you want a case sized for your own set-up, browse our Peli 1200 and the micro cases above, and have a great season in the water. 🌊
