Sun Safety for Kids: Sunscreen Rules, Babies Under 6 Months, Shade, Heat Illness and Sunburn Care
A parent's guide to sun safety for kids: how much sunscreen to use and when to reapply, what the AAP says about babies under 6 months, UV Index basics, clothing and sunglasses, heat illness warning signs, hot car dangers and how to treat a sunburn.
Quick answer: keep babies younger than 6 months out of direct sun; for older children, use a broad-spectrum, water-resistant sunscreen of at least SPF 15 (many dermatologists recommend SPF 30 or higher), apply it about 15 to 30 minutes before going outside, and reapply at least every two hours and after swimming or sweating. Add shade, a wide-brimmed hat, UV-blocking sunglasses and lightweight long sleeves, plan outdoor time around the strongest sun from about 10 a.m. to 4 p.m., and give kids water often to prevent heat illness. Never leave a child alone in a parked car, even for a minute.
Sun protection is one of those parenting tasks that seems simple until you are standing at a crowded pool with a wriggling toddler and a bottle of sunscreen. It matters, though. The CDC notes that just a few serious sunburns can increase a child’s risk of skin cancer later in life, and children spend a lot of time outdoors during the years when sun habits form.
This guide is part of our family health and safety guide. It covers sunscreen, babies, clothing, the UV Index, heat illness and sunburn care, with the source for each recommendation.
This article is general information for parents, not medical advice. Ask your pediatrician about your child’s skin, medications or health conditions. Call 911 for signs of heat stroke. Sources: American Academy of Pediatrics (AAP) via HealthyChildren.org; American Academy of Dermatology (AAD); Centers for Disease Control and Prevention (CDC) sun safety and extreme heat guidance; U.S. Food and Drug Administration (FDA) sunscreen labeling rules; Environmental Protection Agency (EPA) UV Index; American Academy of Ophthalmology (AAO); National Highway Traffic Safety Administration (NHTSA). Checked October 2026.
Why Sun Protection Matters for Kids
Ultraviolet (UV) radiation from the sun damages skin cells. UVB rays cause most sunburns, while UVA rays penetrate deeper and contribute to skin aging and skin cancer; both raise cancer risk. Damage adds up over a lifetime, which is why habits built in childhood count.
A few facts that shape the advice below:
- UV is strongest between about 10 a.m. and 4 p.m., according to the CDC.
- Clouds do not block all UV. Kids can burn on overcast days.
- Water, sand and snow reflect UV, adding to exposure at the pool, beach or ski hill.
- Altitude increases UV exposure, so mountain trips call for extra care.
- Some medications, including certain antibiotics and acne treatments, make skin more sensitive to sun. Ask your pharmacist.
Sun safety is not only a summer issue. A spring soccer season, a fall field trip or a snowy day on the sledding hill can all bring strong UV.
Sunscreen Basics: What to Buy
Read the label for three things: broad spectrum, SPF and water resistance.
| Label term | What it means |
|---|---|
| Broad spectrum | Protects against both UVA and UVB rays; under FDA rules, only broad-spectrum products with SPF 15 or higher can claim to reduce the risk of skin cancer and early skin aging |
| SPF | Sun protection factor, a measure of protection against sunburn (UVB). The AAP recommends at least SPF 15; the AAD recommends SPF 30 or higher |
| Water resistant (40 or 80 minutes) | Stays effective for the stated time while swimming or sweating; the FDA does not allow “waterproof” or “sweatproof” claims |
Mineral sunscreens with zinc oxide or titanium dioxide are often recommended for children with sensitive skin because they are less likely to irritate. In its 2019 proposed sunscreen rule, the FDA proposed that these two ingredients are generally recognized as safe and effective.
Check the expiration date. The FDA requires sunscreens to stay effective for at least three years, and a bottle without a date should be tossed three years after purchase or if it changes color or texture.
Avoid combination sunscreen and insect repellent products. The AAP advises against them because sunscreen needs frequent reapplication while repellent should not be reapplied as often. Use separate products, sunscreen first and repellent on top.
How to Apply Sunscreen Correctly
Most people use too little sunscreen. The AAD advises that most adults need about one ounce, roughly a shot glass full, to cover the body; children need proportionally less but still a generous layer.
- Apply 15 to 30 minutes before going outside so it has time to bind to the skin.
- Cover every exposed area, including ears, back of the neck, tops of feet, the part line in hair and the backs of knees.
- Use lip balm with SPF 15 or higher.
- Reapply at least every two hours, and right after swimming, sweating heavily or towel drying.
- Rub in spray sunscreen. Spray it into your hands first for the face, and avoid spraying near the mouth or eyes or in windy conditions.
Making it routine helps. Some families apply sunscreen at home as part of getting dressed and keep a stick in the beach bag for quick face touch-ups. Check your child care center’s or camp’s sunscreen policy, since many need written permission to apply it.
Sun Safety for Babies Under 6 Months
Babies younger than 6 months have thin, sensitive skin, and the AAP recommends keeping them out of direct sunlight. Practical steps:
- Keep babies in the shade, under a tree, umbrella or stroller canopy, while making sure air can circulate so they do not overheat.
- Dress them in lightweight clothing that covers arms and legs, and a brimmed hat.
- Avoid peak sun hours when you can.
- Use a small amount of sunscreen if shade is not available. The AAP says a minimal amount of SPF 15 or higher sunscreen may be applied to small areas, such as the face and the backs of the hands.
Do not drape a blanket over a stroller to block the sun. It can trap heat and raise the temperature inside. Watch infants closely for signs of overheating, such as fussiness, flushed skin and rapid breathing. The AAP advises calling your pediatrician if a baby younger than 1 year gets sunburned.
Shade, Clothing, Hats and Sunglasses
Sunscreen works best as one layer of protection, not the only one. The CDC recommends combining several:
- Shade: seek it, especially at midday. Umbrellas, pop-up tents and trees all help, though reflected UV still reaches skin.
- Clothing: tightly woven fabric blocks more UV than loose weaves. Clothing labeled with a UPF (ultraviolet protection factor) rating shows how much UV gets through; UPF 50 blocks about 98 percent. Rash guards are useful for swimming.
- Hats: a wide brim of at least 2 to 3 inches shades the face, ears and neck better than a baseball cap.
- Sunglasses: the American Academy of Ophthalmology recommends sunglasses that block 99 to 100 percent of UVA and UVB rays. Look for that wording on the label, not just dark lenses.
How to Use the UV Index
The UV Index, published daily by the EPA and the National Weather Service, predicts how strong the sun’s UV will be on a scale from 0 up to 11 and above. Many weather apps show it.
| UV Index | Risk level | What to do |
|---|---|---|
| 0 to 2 | Low | Sunglasses on bright days; sunscreen if outdoors a long time or near snow or water |
| 3 to 5 | Moderate | Shade at midday, hats, sunscreen |
| 6 to 7 | High | Full protection; reduce time in the sun from 10 a.m. to 4 p.m. |
| 8 to 10 | Very high | Extra precautions; skin can burn quickly |
| 11 or more | Extreme | Avoid midday sun when possible; full protection |
The EPA also suggests a quick check that kids can learn: the shadow rule. If your shadow is shorter than you are, UV rays are strong, so it is time for shade and sunscreen.
Heat Illness: Warning Signs and Prevention
Hot days bring a second risk besides sunburn. Children can develop heat illness during sports, play or hot weather, especially if they are not drinking enough.
Prevention steps from the CDC and AAP:
- Offer water before, during and after outdoor play, and take frequent breaks in the shade.
- Schedule hard activity for cooler times of the day.
- Dress kids in light-colored, loose clothing.
- Ease into hot-weather sports over several days so the body adjusts.
Know the difference between the two most common heat illnesses, as described by the CDC:
| Condition | Signs | What to do |
|---|---|---|
| Heat exhaustion | Heavy sweating, cool and clammy skin, fast and weak pulse, nausea, muscle cramps, tiredness, dizziness, headache, fainting | Move to a cool place, loosen clothing, apply cool wet cloths, sip water; get medical help if vomiting, symptoms worsen or last more than an hour |
| Heat stroke | Body temperature of 103°F or higher, hot red dry or damp skin, fast strong pulse, headache, dizziness, nausea, confusion, passing out | Call 911, move to a cooler place, lower body temperature with cool cloths or a cool bath; do not give fluids to someone who is not fully alert |
Never Leave a Child in a Parked Car
NHTSA warns that a car’s interior can heat up by about 20 degrees Fahrenheit in 10 minutes, and that cracking a window does little to help. Heatstroke is a leading cause of non-crash vehicle deaths for children. Make it a habit to check the back seat every time you leave the car, keep cars locked when parked at home so kids cannot climb in, and call 911 if you see a child alone in a hot car.
How to Treat a Sunburn
Even careful families sometimes miss a spot. The AAD suggests these steps for mild sunburn:
- Get out of the sun as soon as you notice redness.
- Cool the skin with a cool bath or shower or cool, damp cloths.
- Apply a gentle moisturizer, such as one with aloe vera or soy, to soothe dry skin.
- Offer extra water, because a sunburn draws fluid to the skin’s surface.
- Leave blisters alone so they can heal and protect against infection.
- Dress the child in loose, soft clothing that covers the burn when outdoors.
Ask your pediatrician about a pain reliever such as acetaminophen or ibuprofen in the right dose for your child’s age and weight. Call the doctor if the burn covers a large area or is blistering, if the child has a fever, chills, vomiting or seems confused, or if the child is a baby under 1 year.
Building Sun Habits That Last
Children copy what they see. Wear your own hat and sunscreen, keep supplies by the door and make sun protection part of the routine, like buckling a seat belt. A few ideas that help:
- Pack a sun kit with sunscreen, lip balm, hats, sunglasses and water bottles in the car or beach bag.
- Let kids choose their own hat and sunglasses so they want to wear them.
- Use a timer on your phone for reapplication at the pool.
- Plan outings for the morning or late afternoon on high UV days.
- Teach older kids to apply their own sunscreen and to check the UV Index in a weather app.
For pool and beach days, pair these steps with our rules for water safety for kids, since time near water usually means time in strong sun. Our list of outdoor summer challenge ideas for kids includes activities you can schedule for cooler parts of the day.
Frequently Asked Questions
Frequently Asked Questions
What SPF should kids use?
The AAP recommends a broad-spectrum sunscreen with SPF 15 or higher, and the AAD recommends SPF 30 or higher. Water resistance and reapplying every two hours matter as much as the SPF number.
Can I put sunscreen on my baby?
For babies under 6 months, the AAP recommends shade and clothing first. If those are not available, a small amount of SPF 15 or higher sunscreen can be used on small areas such as the face and backs of the hands.
How often should kids reapply sunscreen?
At least every two hours and immediately after swimming, heavy sweating or toweling off, even if the label says water resistant.
Can kids get sunburned on cloudy days?
Yes. Clouds do not block all UV rays, so children can burn on overcast days, especially near water, sand or snow.
When is a sunburn an emergency?
Seek medical care for a burn with widespread blistering, a fever, chills, vomiting, confusion or signs of dehydration, or for any sunburn in a baby under 1 year old. Call 911 for signs of heat stroke.
The Bottom Line
Sun safety for kids rests on layers: shade first for babies, then broad-spectrum sunscreen applied generously and often, hats, sunglasses and covering clothing, outdoor plans built around the UV Index and plenty of water on hot days. Make it a routine, model it yourself and keep a sun kit ready, and most burns and heat illnesses can be prevented.
