Short answer: For summer kayaking, wear a lightweight long-sleeve UPF 50+ shirt, quick-dry synthetic shorts or pants, a brimmed hat, polarized sunglasses with a retainer, and water-friendly footwear — and skip cotton entirely. On the water you get hit by direct sun plus reflected glare off the surface, so sun protection matters more than on any trail, and everything you wear will get splashed, so it needs to dry in minutes, not hours.
Why is dressing for kayaking different from dressing for a hike?
Three things change the math on the water. First, reflected UV: water bounces a meaningful share of UV radiation back up at you, so you're getting exposure from above and below at the same time — including under your chin, your forearms, and the tops of your thighs, spots sunscreen users routinely miss. Second, you will get wet. Paddle drip, splash, boat wakes, and re-entries mean your clothing is damp most of the day. Third, there's no shade. On a trail you duck under trees; mid-lake or mid-river, you carry your shade with you in the form of fabric and a hat brim.
That's why the counterintuitive move — long sleeves in July — is standard among experienced paddlers. A loose, light-colored UPF long sleeve blocks UV better than sunscreen that sweats and washes off, and when it's wet it actually cools you through evaporation.
What shirt should you wear kayaking?
The ideal paddling shirt checks four boxes:
- A stated UPF rating, or a tight, dense weave — a garment rated UPF 50+ blocks the large majority of UV, and unlike sunscreen it doesn't wear off or need reapplying every two hours. Where no rating is printed, a tightly woven synthetic in a darker shade still gives real physical coverage.
- Quick-dry synthetic fabric (polyester or nylon) — sheds water and dries far faster than cotton after a soaking. Cotton stays wet for hours, chafes, and gets heavy.
- Long sleeves with a relaxed fit — covers forearms that sit directly in reflected glare while you paddle, and a bit of air gap between fabric and skin improves cooling.
- Full range of motion — the paddle stroke rotates your torso and raises your arms thousands of times a day; a shirt that binds at the shoulders gets old fast.
This is exactly the use case sun-coverage fishing-style shirts were built for — and the key detail is sleeve length, which is easy to get wrong when shopping online. FREDD MARSHALL's Men's Lightweight Sun-Protective Shirt is the paddling pick: a nylon-stretch quick-dry weave with tight-weave physical sun coverage across the torso and arms, back-panel mesh ventilation, and button-tab roll-up sleeves so you can adjust coverage as the sun moves. The Men's Adventure Tech Shirt is a second long-sleeve option in the same vein, and paddlers who want a women's cut with a stated UPF 50+ rating should look at the summer sun-protection collection. For shaded rivers or overcast days when drying speed matters more than coverage, a short-sleeve technical shirt like the Aero-Force SL Expedition Shirt works — just note it is short-sleeve, so your forearms are on sunscreen duty. Keeping a dedicated "boat shirt" in the dry bag is the easy win here.
Cotton vs. quick-dry on the water: what's the real difference?
| Cotton t-shirt | Quick-dry UPF shirt | |
|---|---|---|
| Dry time after splash | Hours; stays heavy and clammy | Dries quickly, often while you keep paddling |
| UV protection when wet | Drops sharply once soaked | Coverage largely maintained when wet |
| Weight when soaked | Heavy, clings | Minimal change |
| Chafing risk | High under PFD straps | Low |
| Cooling effect | Clammy, then overheats as it insulates poorly | Evaporative cooling as it dries |
The wet-cotton UV number surprises people: a soaked white cotton tee can transmit a large share of UV straight to your skin. If you've ever been sunburned through a shirt at the lake, that's why.
What should you wear on your legs and feet?
Legs: quick-dry shorts for short outings, or lightweight quick-dry pants for all-day trips where the tops of your thighs bake in the sun — in a sit-on-top kayak, your legs are the most exposed part of your body. Avoid denim and cotton sweat shorts for the same reasons as above. A pair with a zip or velcro pocket is worth it for lip balm and a car key — our Men’s Lightweight Quick-Dry Cargo Shorts and Women’s Quick-Dry Hiking Shorts both use zip pockets for exactly that.
Feet: anything that can get wet and stay comfortable — water shoes, sport sandals with a heel strap, or old trail runners with synthetic uppers. Skip flip-flops (they float away during launches) and skip bare feet (boat ramps and riverbeds are rougher than they look).
Head and eyes: a wide-brim or cap-style hat with a chin cord, and polarized sunglasses with a retainer strap. Polarization cuts surface glare so you can actually see into the water — and squint less for eight hours.
When should you bring a layer, even in summer?
Two situations. First, wind: a 10–15 mph breeze over a wet shirt produces serious evaporative chill even at 85°F air temperature. A packable wind shell or lightweight softshell in your dry bag weighs almost nothing and fixes it — if you are unsure which, we compared the two in windbreaker vs. rain jacket, and the packable options live in our jackets collection. Second, cold water: on big reservoirs, spring-fed rivers, or early-season trips, water temperature — not air temperature — determines what happens if you capsize. If the water is below about 60°F, dress for immersion, keep your PFD on, and stay close to shore.
And always: the PFD goes on over everything and stays zipped. A loose-fitting shirt under a snug PFD beats the reverse.
Frequently asked questions
Should I wear long sleeves or short sleeves kayaking in summer?
Long sleeves, in almost every case. Reflected UV off the water hits your forearms all day, and a loose UPF 50+ long sleeve is cooler than bare sunburned skin by the afternoon. Save short sleeves for shaded rivers or short evening paddles.
Can I just use sunscreen instead of a UPF shirt?
Sunscreen works where fabric can't cover (face, hands, tops of feet), but on your torso and arms a UPF shirt is more reliable — it doesn't sweat off, wash off in splash, or depend on you remembering to reapply every two hours. Most paddlers use both: shirt for coverage, sunscreen for the gaps.
What should I not wear kayaking?
Cotton anything (stays wet, loses UV protection, chafes), denim, flip-flops, and jewelry you'd hate to lose. Also avoid tight shirts that restrict paddle-stroke rotation.
Do I really need special clothes to try kayaking once?
No — a synthetic athletic tee, board shorts, and strap sandals will get you through a one-hour rental. But if you’ll be out more than a couple of hours in summer sun, a long-sleeve sun-protective shirt is the single upgrade that prevents the classic first-timer sunburn.