A road trip packs a lot of sun into a few days.
You drive for hours with light pouring through the windows.
Then you step out at overlooks, beaches, trailheads and gas stations under a bright sky.
Each stop feels short, but the minutes add up across a week.
Many travelers come home with a sunburned arm, a red nose or tired, squinting eyes.
This guide explains why sun protection matters on the road and how to build it into your days.
It is based on guidance from the National Library of Medicine and the Environmental Protection Agency.
It is general information, not medical advice.
What UV rays do to skin and eyes
The sun gives off ultraviolet, or UV, rays.
MedlinePlus describes UV rays as an invisible form of radiation.
They can pass through your skin and damage your skin cells.
MedlinePlus explains that a sunburn is a sign of skin damage.
It adds that a suntan is not healthy either.
A tan appears after the sun has already killed some skin cells and damaged others.
Over time, UV exposure can cause wrinkles, skin spots and skin cancer.
It can also cause eye problems.
MedlinePlus notes that UV rays can damage skin in any season and at any temperature.
A cool, breezy day at a mountain overlook still counts.
Why road trips are different
At home, most people spend the middle of the day indoors.
On a road trip, the best views often happen right at midday.
You reach a canyon rim, a lake or a coastal pullout just as the sun is highest.
A few patterns make road trippers easy targets for sunburn.
- Many short stops add up to hours outside, even without a long hike.
- The driver's arm and face sit next to a sunny window for most of the day.
- Cool air from the vents hides how strong the sun really is.
- Water, sand and pale rock in parks reflect light toward you.
- Travel days break normal routines, so sunscreen gets forgotten.
The window question
Many drivers assume the car protects them completely.
Glass does change what reaches you, but car windows are not all the same.
You cannot tell how much UV a window blocks just by looking at it.
The safest habit is simple.
If the sun falls on your arm or face for hours, protect that skin as if you were outside.
Long sleeves, a light shirt over your driving arm or sunscreen on exposed skin all help.
Do not add any film or tint to your windows without checking your state's rules first.
Read the UV Index before you go
The UV Index tells you how strong the sun's UV rays are expected to be.
Weather apps and local forecasts often show it next to the temperature.
The EPA's UV Index scale breaks the numbers into three groups.
- 1 to 2, low: You can safely stay outside with minimal sun protection.
- 3 to 7, moderate to high: Protection is needed. Seek shade from late morning through mid-afternoon.
- 8 and above, very high to extreme: Extra protection is needed. Be careful outside, especially in the middle of the day.
For moderate levels and above, the EPA recommends broad-spectrum sunscreen with SPF 15 or higher.
It also advises protective clothing, a wide-brimmed hat and sunglasses.
Check the UV Index for each place on your route, not just your home town.
A high-elevation park or a southern desert can be very different from where you started.
Use the shadow rule
You do not always have a forecast handy at a remote stop.
The EPA offers an easy check called the shadow rule.
If your shadow is taller than you are, your UV exposure is likely lower.
That usually happens in the early morning and late afternoon.
If your shadow is shorter than you are, you are getting higher levels of UV.
That usually happens around midday.
When your shadow is short, seek shade and protect your skin and eyes.
Kids enjoy this test, and it turns sun safety into a quick game at each stop.
Plan stops around the strongest sun
MedlinePlus advises staying out of the sun when it is strongest, between 10 am and 2 pm.
On a road trip, you can use that window for driving instead of standing outside.
- Visit open viewpoints and beaches in the morning or late afternoon.
- Use the midday hours for longer drives with the windows covered on the sunny side.
- Plan lunch at a shaded picnic area, a visitor center or a restaurant.
- Save museums and indoor exhibits for the middle of the day.
This plan also helps with heat.
Our guide to road trips in hot weather explains how to keep passengers safe when temperatures climb.
Sunscreen that actually works on the road
MedlinePlus recommends sunscreen with an SPF of 15 or higher.
The EPA adds that it should be broad-spectrum and applied generously on exposed skin.
A few road trip habits make sunscreen easier to use.
- Keep one bottle in the front of the car and one in the day bag.
- Put it on before you leave the car, not after you feel the sun.
- Cover the spots people miss: ears, the back of the neck, the tops of feet and the driver's left arm.
- Put more on after swimming, heavy sweating or towel drying.
Follow the directions on the label for how much to use and how often to reapply.
Store sunscreen out of direct sun inside the car when you can, such as in a door pocket or a cooler.
Clothing and hats do a lot of the work
Sunscreen is only one layer of protection.
MedlinePlus and the EPA both recommend protective clothing.
Clothing does not wear off or wash away during a swim.
- A wide-brimmed hat shades the face, ears and neck better than a cap.
- A light long-sleeved shirt protects arms on hot days without much extra heat.
- Pants or a light wrap can cover legs at a beach or sunny overlook.
- A spare shirt in the car helps the driver cover a sunny arm.
Protect your eyes, especially behind the wheel
UV can harm eyes as well as skin.
MedlinePlus recommends wraparound sunglasses that provide 100% UV protection.
Wraparound frames help block light that comes in from the sides.
For drivers, sunglasses also reduce squinting into bright pavement and glare.
Keep a pair within easy reach so you never search for them while driving.
Bring a spare pair for kids, since theirs tend to get lost.
Remove dark sunglasses before you enter a tunnel or drive at dusk.
Kids and babies
Children spend many road trip stops running around in the open.
Dress them in hats and light layers, and make sunscreen part of the routine before leaving the car.
Babies need extra care.
MedlinePlus links to Food and Drug Administration guidance that sunscreen is usually not recommended for infants.
Keep babies in the shade, dress them in light protective clothing and ask their healthcare provider for advice.
Medicines and sun sensitivity
MedlinePlus lists the sun and medicines, along with photosensitivity, among related topics.
Some medicines can make skin more sensitive to sunlight.
Before a sunny trip, ask a pharmacist whether any medicine you take does this.
If it does, plan more shade and more covering clothing.
If someone gets sunburned
Sunburn can make the next days of a trip uncomfortable.
Get the person out of the sun and keep the burned skin covered on the following days.
Plan shaded or indoor activities while the skin heals.
Watch for signs that someone is also overheated.
Our guide to desert road trips explains the warning signs of heat illness.
Contact a healthcare provider for a severe or blistering burn, especially in a child.
After the trip: check your skin
MedlinePlus recommends checking your skin regularly.
Look for changes in the size, shape, color or feel of birthmarks, moles and spots.
Such changes can be a sign of skin cancer.
Talk with a healthcare provider if you notice something new or changing.
A road trip sun kit
- Broad-spectrum sunscreen, SPF 15 or higher, in the car and in the day bag.
- A wide-brimmed hat for each traveler.
- Light long-sleeved shirts.
- Wraparound sunglasses with 100% UV protection, plus a spare pair.
- A shade or towel for the sunny side window when parked.
- Water for everyone.
For the rest of your packing, see our national park road trip planning guide.
The bottom line
Sun damage on a road trip builds up quietly, one stop at a time.
Check the UV Index, use the shadow rule and plan open-air stops away from midday.
Cover up with clothing, a hat and sunglasses, and use sunscreen on what stays exposed.
These small habits let you enjoy every viewpoint without paying for it later.
Sources and Further Reading
- MedlinePlus (National Library of Medicine): Sun Exposure — supports how UV rays damage skin, why tans are not healthy, damage in any season, the 10 am to 2 pm window, SPF 15 or higher, protective clothing, wraparound sunglasses, skin checks and the related topics on infants and medicines.
- Environmental Protection Agency: UV Index Scale — supports the three UV Index levels, the protection advised at each level and the shadow rule.