The best sunglasses for a cruise are the same ones experts recommend as the best sunglasses for boating: polarized lenses to cut glare off the water, a label promising 100% UV protection (UV400), and a close-fitting or wraparound frame that will not blow off on a windy deck. Designer names such as Ray-Ban, Persol and Prada look great on shore days, while marine-focused brands like Costa, Maui Jim and Oakley are built specifically for bright sun on open water.
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A week at sea means far more sun than a normal holiday. Light hits you from above and bounces back off the ocean, the pool deck and white ship paintwork. Here is what to look for, which lens colours work best, and how to stop salt air ruining an expensive pair.
Why sunglasses matter more on a cruise
On land, much of the sun’s glare is broken up by trees, buildings and shade. On a ship, there is often nothing between you and the horizon. Water reflects a lot of light, and reflected glare is what makes you squint, gives you headaches and tires your eyes by mid-afternoon.
The American Academy of Ophthalmology notes that UV light passes through clouds and haze, so an overcast sea day is not a day off from protection. Long-term UV exposure is linked to cataracts and growths on the eye, which is why a good pair is a health item as well as an accessory.
What to look for in the best sunglasses for boating and cruising
1. 100% UV protection (UV400)
This is the non-negotiable feature. Look for a label that says “100% UVA/UVB” or “UV400”; both mean full blocking. According to the American Academy of Ophthalmology, a darker lens is not a sign of better protection, and inexpensive glasses can protect just as well as costly ones if they carry the right label.
2. Polarized lenses
Polarization does not add UV protection, but it does cut horizontal glare from shiny surfaces such as water. This is the feature that makes the biggest difference at sea. With polarized lenses you can watch for dolphins, see into clear Caribbean shallows on a tender ride and read the sea surface without squinting. If you only upgrade one thing, make it polarized lenses.
3. Coverage and fit
Larger and wraparound frames let less light in from the sides, which matters when the sun bounces up from the water. Eyewear maker Julbo recommends a curved, close-fitting frame for sailing and suggests checking that glasses stay put when you lower your head and shake it gently. That is a good test for windy top decks and open-air tenders.
4. Lens material
Glass lenses give excellent clarity and resist scratches but are heavier and can break if dropped on deck. Polycarbonate and other plastic lenses are lighter and more impact-resistant, which suits active shore excursions such as snorkelling trips and kayaking.
5. Coatings
Hydrophobic (water-repelling) and oleophobic (oil-repelling) coatings help spray, sunscreen and fingerprints wipe off more easily. Mirrored coatings reduce the amount of light reaching your eyes in very bright conditions.
Best lens colours for a cruise
Lens tint does not change UV protection, but it does change how the world looks. Costa, a brand with roots in fishing and boating, matches its tints to water and light conditions, and that is a useful way to think about a cruise too.
| Lens colour | Best for | What it does |
|---|---|---|
| Grey | All-day wear, bright open sea | Cuts brightness evenly and keeps colours natural |
| Blue mirror | Very bright sun on deep, open water | Mirrored outer layer reflects extra light and glare |
| Brown, copper or amber | Variable light, ports, beaches | Boosts contrast and depth perception |
| Green or green mirror | Shallow, clear water such as lagoons | Good contrast with a fairly natural look |
| Rose or red-based | Spotting detail on the water | Enhances reds and greens; used in some open-water sport lenses |
| Photochromic | Moving between sun and shade | Darkens in strong light and lightens in shade |
For most cruise passengers, a grey or brown polarized lens is the most versatile single pair. If you are heading somewhere very bright, such as the Caribbean (see our guide to Western Caribbean cruise ports), a mirrored lens is worth considering. For Alaska’s mix of cloud, glare from glaciers and sudden sunshine, a contrast-boosting brown or a photochromic lens works well; our guide to the best cruise line to Alaska covers what to pack for that trip.
Designer and sport sunglasses brands worth a look
There is no single best pair for everyone, and fit matters more than the logo. These are well-known brands with genuine strengths for time on the water. Check that any specific model you choose is polarized, as many designer frames are sold both with and without polarization.
Costa
Every pair of Costa sunglasses is polarized and blocks 100% of UV. Its 580 lenses are designed to filter harsh yellow light and sharpen contrast. It offers both glass and polycarbonate options, plus a range of mirror tints for different water conditions. A strong choice if you want something made for life on boats.
Oakley
Oakley’s Prizm Deep Water Polarized lens is built for open water, with a rose base and mirrored finish. Its sport frames, such as the Split Shot, are often recommended for boating and come with grippy, close-fitting designs that suit excursions and windy decks.
Maui Jim
Maui Jim is known for its PolarizedPlus2 lens technology, which is designed to reduce glare and make colours look richer. It offers a broad range of styles, from sporty wraparounds to dressier frames that work equally well at dinner in port.
Ray-Ban
Classic Aviator and Wayfarer shapes have been popular for decades, and both are sold with polarized lens options. They are a good middle ground if you want one recognisable pair for deck, pool and city sightseeing.
Persol
The Italian brand is known for its silver arrow hinges, flexible Meflecto temples and the folding 714 model, which packs neatly into a day bag. Persol suits travellers who want a refined, timeless look.
Prada Linea Rossa
Prada’s sport-inspired line pairs luxury styling with lighter, more active frames, making it a fashion-led option for passengers who want designer looks with a sportier fit.
Smith
Smith’s ChromaPop lenses are designed to boost contrast and colour, and the brand has a range of polarized frames popular with anglers and paddlers. A practical pick for active shore excursions.
Practical tips for sunglasses on a cruise
Even the best sunglasses for boating will not last long if they are dropped over the rail or scratched by salt. These habits help.
- Use a retainer strap or floating cord. Tender rides, ship’s rails and windy open decks are where sunglasses go overboard. A floating cord keeps them on you and helps them stay afloat if they drop in the water.
- Pack a spare pair. An inexpensive UV400 pair for the pool or beach means your good pair stays safe in the cabin.
- Rinse before you wipe. Salt spray dries into tiny crystals that can scratch lenses if you rub them with a shirt. Rinse with fresh water first, then dry with a microfibre cloth.
- Keep them out of the heat. Do not leave sunglasses on a sun lounger or dashboard for hours; heat can damage coatings and warp some frames.
- Bring a hard case. Soft pouches will not protect frames in a packed beach bag.
- Consider prescription sunglasses. If you wear glasses, prescription polarized lenses or well-fitting clip-ons save you swapping pairs all day.
- Watch out for screens. Polarized lenses can make some phone screens, cameras and digital displays look dark or patchy at certain angles. That is normal, and tilting the screen usually helps. You can also use it to test whether a pair is genuinely polarized.
Planning where you will need them most? Sun-soaked itineraries like those in our best Mediterranean cruises guide are exactly where a quality pair earns its place in your suitcase.
FAQs
Do I need polarized sunglasses for a cruise?
They are not essential, but they make a big difference. Polarized lenses cut glare reflected off the sea, which reduces squinting and eye strain on deck. Make sure they also block 100% of UV, as polarization alone does not.
What colour polarized lens is best for boating?
Grey or blue mirror lenses suit bright sun on open, deep water. Brown, copper or green lenses boost contrast in changing light or shallow water. Grey or brown is the most versatile choice for a cruise.
Who shouldn’t wear polarized sunglasses?
Polarized lenses can make some digital screens hard to read, so people who rely on LCD displays, such as pilots, often avoid them. For most cruise passengers they are a good choice.
Are expensive designer sunglasses better at blocking UV?
No. The American Academy of Ophthalmology says inexpensive sunglasses can block UV as well as costly ones. Look for a “100% UVA/UVB” or “UV400” label. You pay more for frame quality, lens clarity and style.
