The short version
- Pack in layers of priority: safety first, then sun and shade, food and water, toys, and comfort.
- Bring a properly fitting, Coast Guard-approved life jacket for every person, and put kids in theirs before the dock, not after.
- Use two coolers: one for drinks, one for food. Keep perishables at 40°F or below and out of the heat.
- Check the forecast and the water before you swim. If you hear thunder, get off the water. If the water looks scummy or smells bad, stay out.
- Pack out everything you bring, and clean, drain and dry your gear before the next lake.
The best lake days feel effortless, and that's usually because someone packed well. Nothing derails an afternoon faster than a forgotten life jacket for the youngest kid, a dead phone, warm potato salad or a sunburn that starts at lunch. Below is our complete packing list, organized by priority, with a printable-style checklist table near the end. Use it as-is or trim it down to fit your crew.
1. Safety gear: pack this first
If you only remember one category, make it this one. Everything else is about comfort. This is about getting everyone home.
- A life jacket for every person, sized and fitted to that person. On a boat, the Coast Guard requires a USCG-approved wearable life jacket for each person on board. Federal law requires children under 13 to wear one while the vessel is underway, unless they're below deck or in an enclosed cabin, and state rules may go further. Even on a beach day with no boat, a life jacket for weak swimmers and kids is a smart call. Our guide to life jacket types and fit explains what to buy.
- A throwable flotation device (ring buoy or cushion) if you're on a boat. The Coast Guard says it must be immediately available, not buried in a locker.
- A whistle for each paddler or swimmer who might wander off.
- A first aid kit with bandages, antiseptic wipes, tweezers (for splinters and hooks), an antihistamine, any personal medications and an EpiPen if someone in your group needs one.
- A phone in a waterproof case, plus a charged power bank. Our waterproof ratings guide explains which cases actually survive a dunk.
- Water shoes for rocky shorelines, docks and hot sand. See our water shoes guide.
When kids are swimming, put one adult on watch, with no phone and no book, and hand off the role out loud when they need a break. Life jackets and a dedicated watcher work together; neither replaces the other. Our guide to teaching kids watersports safely goes deeper.
2. Sun and shade
A lake is a sun trap. You get UV from above and reflected off the water, often for hours through midday. Pack for prevention, not repair.
- Broad-spectrum, water-resistant sunscreen (SPF 30+ is our pick), plus SPF lip balm. Set a phone timer to reapply.
- UPF rash guards or sun shirts for everyone, especially kids. They don't wash off. Read our rash guard and UPF guide for why they beat sunscreen alone.
- Wide-brim hats with chin straps, so they don't blow into the lake.
- Polarized sunglasses on retainers. They cut glare and help you spot rocks and swimmers.
- Shade: a beach umbrella with a sand anchor or a pop-up canopy with proper stakes and weights. Lake breezes are gusty. Our beach shade guide covers what holds up in wind.
3. Food, water and the cooler
Food safety gets overlooked on lake days, and a hot afternoon is exactly when it matters. The FDA's guidance for eating outdoors boils down to a few rules:
- Keep cold food at 40°F or below with plenty of ice or frozen gel packs. Pack meat, poultry and seafood frozen so they stay cold longer.
- Use two coolers: one for drinks, which gets opened constantly, and one for perishable food, which stays shut.
- Wrap raw meat securely so juices can't drip onto ready-to-eat food.
- Watch the clock. Don't leave perishable food out for more than 2 hours, or more than 1 hour when it's above 90°F. When in doubt, throw it out.
- Bring a hand-washing setup if there's no running water: a water jug, soap and paper towels, or moist towelettes.
For drinks, plan on more water than you think you need. Freeze a few bottles the night before to double as ice packs. Pack salty snacks for kids who've been swimming all day, along with a trash bag and a separate bag for recyclables.
Pre-chill your coolers. Fill them with ice or frozen jugs the night before, then dump that ice and repack with fresh ice in the morning. A warm cooler burns through its first load of ice just cooling itself down. Park the food cooler in the shade, under a towel.
4. Water toys and gear
Pack toys to match your crew and the lake rules. Some lakes restrict inflatables or motorized craft, and many swim areas are buoyed off.
- Paddleboards or kayaks, with a leash, paddle, life jacket and pump if inflatable. New to SUP? Start with our first-session guide.
- Floats and loungers: inflatable loungers, float mats and noodles. Tie them off or keep a hand on them. A light breeze carries floats (and the people on them) across a lake faster than you'd expect.
- Snorkel and mask for clear lakes.
- Towables if you have a boat, along with a rated tow rope and an observer flag. See tow sports safety.
- An electric pump that runs off a car outlet or battery, so you're not inflating things by hand.
- Fishing gear and your license, if anyone plans to cast.
Shop the gear: Floats and inflatables · Beach and lake essentials
5. Clothes, comfort and the bag itself
- Swimsuits plus a dry change of clothes, including underwear, in a dry bag.
- Quick-dry towels (one per person, plus a spare).
- A warm layer for the ride home. Lakes cool off fast after sunset.
- Camp chairs or a sand-free beach blanket.
- Bug spray, especially for evenings near the shoreline.
- Dry bags for keys, wallets and clothes. A 10–20 liter roll-top handles most day trips. See our dry bag guide.
- Cash for park entry, launch fees or the snack shack.
- A small bluetooth speaker, kept at a volume your neighbors won't notice.
The complete lake day checklist
| Category | Item | Notes |
|---|---|---|
| Safety | Life jackets (one per person) | Sized and fitted; kids wear theirs on the dock |
| Safety | Throwable flotation (on boats) | Immediately reachable |
| Safety | Whistles, first aid kit, meds | Include tweezers and antihistamine |
| Safety | Phone in waterproof case, power bank | Share your plan with someone at home |
| Sun | Sunscreen, SPF lip balm | Reapply on a timer |
| Sun | Rash guards, hats, polarized sunglasses | Retainers and chin straps |
| Sun | Umbrella or canopy, with anchors | Sand anchor, stakes or weights |
| Food | Drinks cooler + food cooler | Food at 40°F or below |
| Food | Water (more than you think), snacks, lunch | Frozen bottles double as ice |
| Food | Hand-washing kit, trash and recycling bags | Pack it in, pack it out |
| Toys | Boards, kayaks, floats, snorkels | Check lake rules first |
| Toys | Pump, repair kit, leash | Electric pump saves the afternoon |
| Comfort | Towels, dry clothes, warm layer | Pack in a dry bag |
| Comfort | Water shoes, chairs, blanket, bug spray | Water shoes for rocky entries |
| Admin | Park pass, fishing license, cash, keys | Keys in a floating key ring or dry box |
Want a broader safety run-through? Use our water safety checklist before you leave the driveway.
Before you swim: weather and water checks
Thunder means off the water
The National Weather Service is clear: if you can hear thunder, lightning is close enough to strike you. Get out of and away from the water, move to a substantial building or a hard-topped vehicle with the windows up, and wait at least 30 minutes after the last thunder before going back out. Check the forecast that morning and again at lunch. Afternoon storms build fast over lakes in summer. Our guide to weather and lightning on the water has more.
Look at the water itself
Harmful algal blooms can make people and pets sick. The CDC advises staying out of water that looks discolored, has scum, or smells bad. Blooms can look like foam, scum, mats or paint on the surface. Check for local swimming advisories before you go. If you or your dog does get into a bloom, rinse off with tap water right away. Contact a vet immediately if a pet seems ill afterward, because animals can become very sick within hours.
If you're running a boat, the person at the helm should stay sober all day. Keep plenty of water and non-alcoholic drinks aboard for everyone.
Leave the lake as you found it
Before you leave, pack out every scrap of trash. Then follow the US Fish and Wildlife Service's "Clean, Drain, Dry" routine. Remove plants, animals and mud from boats, boards and gear before you leave the access. Drain bilges, livewells and anything holding water. Let everything dry completely before visiting another lake. That's how you avoid carrying invasive species like zebra mussel larvae from one lake to the next. Never dump unused live bait into the water. Put it in the trash.
FAQ
Do kids have to wear life jackets at the lake?
On a boat that's underway, federal law requires children under 13 to wear a USCG-approved life jacket (except below deck or in an enclosed cabin), and many states have their own rules. On a beach or dock there's often no legal requirement, but a properly fitted life jacket is still the simplest way to protect weak swimmers.
How long can food stay out at the lake?
The FDA says no more than 2 hours for perishable food, and only 1 hour when it's above 90°F. Keep the food cooler closed, shaded and at 40°F or below.
When is it safe to go back in the water after a storm?
The National Weather Service recommends waiting at least 30 minutes after the last thunder you hear.
What's easiest to forget?
The small stuff: dry clothes and a warm layer for the ride home, a phone charger and the park pass. Pack them in a dry bag the night before so they're not left to the last minute.