Sun Safety
The best sunscreen for swimming
Eighty minutes is the longest water-resistance claim a US sunscreen may make. These are the ones that carry it, plus what the claim does not cover.
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Our overall pick is Thinksport SPF 50+: 20% non-nano zinc oxide with the maximum 80 minutes of water resistance, in tubes big enough to reapply from all afternoon. Every product on this page carries that 80-minute claim — nothing with 40 minutes made the list, because a pool afternoon exhausts 40 minutes before the first snack.
The claim is also narrower than it sounds. Eighty minutes is the longest US labels may state, it is measured in water, and it says nothing about towels: drying off removes sunscreen regardless of what the bottle claimed. So the pick matters, and the reapplication habit matters more.
Quick picks
Tap any row to read the full write-up below.
| # | Product | Best for | Price |
|---|---|---|---|
| 1 |  Thinksport Sunscreen SPF 50+Best overall · SPF 50+ | A pool or beach day for the whole household | $19.97 · View on Amazon #ad We earn from qualifying purchases · Price as of October 10, 2026 |
| 2 |  Blue Lizard Sport Mineral Sunscreen Spray SPF 50+Fastest to reapply · SPF 50+ | Getting a second coat on between swims | $16.98 · View on Amazon #ad We earn from qualifying purchases · Price as of October 10, 2026 |
| 3 |  Blue Lizard Kids Mineral Sunscreen SPF 50+Best for children · SPF 50+ | Kids in and out of a pool all afternoon | $14.88 · View on Amazon #ad We earn from qualifying purchases · Price as of October 10, 2026 |
| 4 |  Sun Bum Mineral Sunscreen Lotion SPF 50Best for surf and open water · SPF 50 | Long sessions in salt water | $16.99 · View on Amazon #ad We earn from qualifying purchases · Price as of October 10, 2026 |
| 5 |  Thinksport Sunscreen Stick SPF 30+Best for the spots that burn · SPF 30+ | Ears, noses, partings and the tops of feet | $9.99 · View on Amazon #ad We earn from qualifying purchases · Price as of October 10, 2026 |
What water resistance actually means
A US sunscreen may claim water resistance for 40 or 80 minutes and nothing else. The number comes from a test in which the product is applied, the subject immerses for set intervals, and the SPF is measured again — so the label means the product still delivered its stated SPF after that much time in water. The words *waterproof* and *sweatproof* were banned from US labels in 2012 precisely because they implied something no sunscreen does.
Three things the claim does not cover, all of which matter at a pool: toweling, which physically removes the film; sand, which does the same thing more aggressively; and the time you spend out of the water between swims, during which the two-hour reapplication clock is still running. Water-resistant sunscreen explained covers the test in detail.
What we looked for
- The 80-minute water-resistance claim, with no exceptions on this page.
- SPF 50 or 50+, because swimming is long exposure and the higher number buffers thin application.
- Mineral filters, which satisfy every reef-protection law and do not sting eyes — the two things that decide a pool day with children.
- A format that can realistically be reapplied wet, which rules out some otherwise fine lotions.
- Enough volume to reapply three or four times without rationing. Our methodology.
Our picks in detail
01 · Best overall
Thinksport Sunscreen SPF 50+
Thinksport · Read our Thinksport review
20% non-nano zinc with the maximum 80 minutes of water resistance, in large tubes — the bottle you can reapply from four times in an afternoon without counting the cost.
- Actives:
- 20% non-nano zinc oxide
- SPF:
- SPF 50+
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only — no oxybenzone, octinoxate or octocrylene
- Best for:
- A pool or beach day for the whole household
What works
- Maximum labeled water resistance
- Zinc-only, so unrestricted everywhere
- Large sizes make generous reapplication realistic
The trade-off
- Visible white cast
- Thick on a face
#ad We earn from qualifying purchases · Price as of October 10, 2026
02 · Fastest to reapply
Blue Lizard Sport Mineral Sunscreen Spray SPF 50+
Blue Lizard · Read our Blue Lizard review
24% zinc oxide as the sole filter with 80 minutes of water resistance in a continuous spray — the quickest way to re-cover arms, legs and backs before everyone is back in the water.
- Actives:
- 24% zinc oxide as the sole active filter
- SPF:
- SPF 50+
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only — no oxybenzone or octinoxate
- Best for:
- Getting a second coat on between swims
What works
- High published zinc percentage
- 80-minute water resistance
- Covers large areas in seconds
The trade-off
- Must still be rubbed in to deliver the tested dose
- Never spray near a face
#ad We earn from qualifying purchases · Price as of October 10, 2026
03 · Best for children
Blue Lizard Kids Mineral Sunscreen SPF 50+
Blue Lizard · Read our Blue Lizard review
Mineral filters with the maximum 80 minutes of water resistance in a formula built for children — nothing in it to sting eyes, which is what decides whether a child stands still for the second coat.
- Actives:
- Zinc oxide and titanium dioxide
- SPF:
- SPF 50+
- Water resistance:
- 80 minutes
- Reef status:
- Mineral filters only
- Best for:
- Kids in and out of a pool all afternoon
What works
- 80-minute water resistance
- Mineral filters only
- Does not sting eyes
The trade-off
- Noticeable cast
- Thicker than an adult lotion
#ad We earn from qualifying purchases · Price as of October 10, 2026
04 · Best for surf and open water
Sun Bum Mineral Sunscreen Lotion SPF 50
Sun Bum
Mineral filters at SPF 50 with 80 minutes of water resistance in a formula that spreads easily over a wet-and-dry cycle — the one that holds up through repeated salt and sand.
- Actives:
- Zinc oxide and titanium dioxide
- SPF:
- SPF 50
- Water resistance:
- 80 minutes
- Reef status:
- Mineral filters only
- Best for:
- Long sessions in salt water
What works
- 80-minute water resistance
- Mineral filters only
- Spreads well on damp skin
The trade-off
- Visible cast
- Scented
#ad We earn from qualifying purchases · Price as of October 10, 2026
05 · Best for the spots that burn
Thinksport Sunscreen Stick SPF 30+
Thinksport · Read our Thinksport review
24% zinc oxide with 80 minutes of water resistance in a stick — the format that reaches the reflected-UV spots a lotion pass always misses, and will not leak in a wet bag.
- Actives:
- 24% zinc oxide
- SPF:
- SPF 30+
- Water resistance:
- 80 minutes
- Reef status:
- Zinc only — no oxybenzone, octinoxate or octocrylene
- Best for:
- Ears, noses, partings and the tops of feet
What works
- Maximum water resistance
- Precise on awkward spots
- No spill risk
The trade-off
- Obvious white film
- Slow over large areas
#ad We earn from qualifying purchases · Price as of October 10, 2026
The picks compared
| Product | Actives | SPF | Water resistance | Format |
|---|---|---|---|---|
| Thinksport SPF 50+ | 20% non-nano zinc oxide | SPF 50+ | 80 minutes | Lotion |
| Blue Lizard Sport Mineral Spray | 24% zinc oxide | SPF 50+ | 80 minutes | Spray |
| Blue Lizard Kids Mineral SPF 50+ | Zinc oxide and titanium dioxide | SPF 50+ | 80 minutes | Lotion |
| Sun Bum Mineral SPF 50 | Zinc oxide and titanium dioxide | SPF 50 | 80 minutes | Lotion |
| Thinksport Sunscreen Stick SPF 30+ | 24% zinc oxide | SPF 30+ | 80 minutes | Stick |
Pool, lake or ocean — does it change the choice?
Less than people expect, with two exceptions. Chlorinated pools are harder on a sunscreen film than fresh water, so the 80-minute claim is worth treating as a ceiling rather than a promise. And salt water comes with sand, which means toweling and friction, which means more frequent reapplication than the clock alone suggests.
The genuine difference is reflection. Water bounces UV back up at you, so time spent floating or sitting at the edge delivers more than the same time on a lawn. That is why the undersides of chins, the backs of ears and the tops of feet burn at pools and almost nowhere else — and they are exactly the spots a lotion pass misses.
Reapplying on wet skin
- Towel first, properly. Sunscreen will not adhere to a water film, so a quick pat is a wasted application.
- Reapply at the two-hour mark whatever the label said, and immediately after toweling off, which ends water resistance outright.
- Use a stick for the awkward spots — ears, noses, the tops of feet, the parting on a head. These are where pool burns happen.
- Do not spray near a face. Spray into a hand and apply from there. The FDA's advice against inhaling sunscreen sprays applies to mineral cans as much as chemical ones.
- Count the dose, not the gesture. An adult body needs about an ounce — a shot glass. How much sunscreen to apply breaks it down by body area.
The change that beats a better sunscreen
A rash guard. A UPF 50+ swim top blocks at least 98% of UV across the entire torso for as long as it is worn, wet or dry, and never needs reapplying — which removes the largest and most awkward area from the job and leaves sunscreen handling faces, necks, hands and lower legs. On children it is the single highest-leverage purchase in sun care. The best kids rash guards and sun shirts, and does UPF clothing work when wet? answers the obvious follow-up.
Sources
- Questions and Answers: FDA Requirements for Over-the-Counter Sunscreen Products — U.S. Food and Drug Administration
- Sunscreen: How to Help Protect Your Skin from the Sun — U.S. Food and Drug Administration
- Sunscreen FAQs — American Academy of Dermatology
- Sunscreen — Skin Cancer Foundation
- 21 CFR 201.327 — Over-the-counter sunscreen drug products; required labeling — Legal Information Institute, Cornell Law School
Frequently asked questions
What is the best sunscreen for swimming?
Thinksport SPF 50+ — 20% non-nano zinc oxide with the maximum 80 minutes of water resistance, in tubes large enough to reapply from all afternoon. Every pick on our list carries the 80-minute claim.
How long does water-resistant sunscreen last in a pool?
Forty or eighty minutes of water immersion, depending on which claim the label carries — those are the only two claims US labels may make. Treat the number as a ceiling in chlorinated water, and reapply at two hours regardless.
Do I need to reapply sunscreen after swimming?
Yes, and specifically after toweling off. Drying with a towel removes the sunscreen film whatever the water-resistance claim said, so the clock resets the moment you dry yourself.
Is there such a thing as waterproof sunscreen?
No. Waterproof and sweatproof were banned from US sunscreen labels in 2012 because no product delivers either. The only permitted claim is water resistance for 40 or 80 minutes.
Is a rash guard better than sunscreen for swimming?
For the torso, yes. A UPF 50+ swim top blocks at least 98% of UV wet or dry and never needs reapplying. Sunscreen is still needed for the face, neck, hands and lower legs.
Read next
Sun Safety
What water-resistant sunscreen actually means
What the 40 and 80-minute claims measure, why toweling ends them, and how to plan a pool day around it.
Sun Safety
The best sunscreens
One pick per situation — face, body, kids, water, sensitive skin — chosen on the label, not the packaging.
Sun Protective Gear
The best kids rash guards and sun shirts
UPF 50+ swim shirts for children, how to size them, and why they beat any sunscreen upgrade.
Sun Safety
How much sunscreen to apply
The measures by body area, and why under-application costs more protection than it seems.
Kids & Baby
The best sunscreen for kids
Zinc-first kids formulas chosen on water resistance, sting and how fast they go on.