We went through the packing notes on all 72 swimming adventures in our database - 53 have detailed notes - and pulled out what actually gets recommended and, more usefully, why. Some of it is obvious. Some of it is a genuine safety signal hiding in plain sight.

Towels and sunscreen are the floor, not the list

Towels appear in 89% of swimming packing notes. Sunscreen appears in 87%. These are the only two items in the entire dataset that are close to universal for a single activity.

That’s not a useful insight on its own - you were going to bring towels. What’s useful is what it implies about everything below them. Anything appearing on 30% or 40% of entries is not a nice-to-have; it’s an item that a third of these places specifically stopped to tell you about. Those are the ones worth reading.

Water shoes are a safety item, not a comfort item

Water shoes show up in 34% of swimming notes - 18 entries - and almost every one of them explains itself:

• Jacob’s Well Natural Area - “water shoes (the rock entry is slick)”
• North Shore Shark Cove - “water shoes (rocky entry)”
• Ahihi-Kina’u Natural Area Reserve - “water shoes (essential for lava rock entry)”
• Electric Beach - “water shoes (rocky entry)”
• Emma Long Metropolitan Park - “water shoes for the rocky stretches of lake bottom”
• South Llano River State Park - “water shoes (the rocky riverbed needs them)”
• Grimes Glen Park - “water shoes (required)”

Notice what’s missing from that list: sandy beaches. Water shoes never get recommended for sand. They get recommended for limestone, lava rock, river cobble and creek beds - the entry, not the swim. The single word that appears next to “water shoes” more than any other is entry.

So the rule is simple: if the water is spring-fed, river-fed, or reef-adjacent, water shoes. If it’s a sand beach, don’t bother. Grimes Glen Park is the only entry in the whole dataset that uses the word “required.”

Reef-safe sunscreen is a Hawaii rule, and it’s absolute

Twenty-four swimming entries specify reef-safe sunscreen. All 24 are in Hawaii. Not most - all of them. Every single Hawaii beach entry in our data specifies reef-safe.

Texas has its own version of this, and it’s stricter than people expect. Blue Hole Regional Park in Wimberley calls for “rub-on sunscreen (spray sunscreen is prohibited to protect the creek).” Jacob’s Well says the same thing and adds “no coolers, glass, or pets at the well.”

If you’re heading to a spring, a creek or a reef, mineral-based rub-on sunscreen is the safe default everywhere and the only legal option in some places. Buy one bottle for the whole family and stop thinking about it.

The mixed-ages problem: minimum ages are a water-safety scale

Here’s the part that’s genuinely useful if you’ve got kids at different swimming levels. Every adventure in our database has a minimum recommended age, and for swimming spots those ages aren’t about maturity - they’re a proxy for how dangerous the water is.

Sort the 72 swimming spots by minimum age and three clear tiers appear.

Age 1-2 (32 spots): protected water, sand entry, no surprises. These are calm lagoons, roped beaches and lakefront swim areas. Baby Beach Lahaina, Ko Olina Lagoons, Anini Beach Park, Lydgate Beach Park, Million Dollar Beach on Lake George, Lake Placid Public Beach. Their packing notes are short and boring - swimsuit, towels, sunscreen - because there’s nothing to warn you about. That’s the point.

Age 3-4 (24 spots): real swimming, supervised. Lake beaches, state park swim areas, splash pad combos. Seneca Lake State Park adds “change of clothes for splash pad,” which is the most parent-brained note in the whole dataset.

Age 5+ (16 spots): the water itself is the hazard. This is where every rocky entry, deep pool, shore break and snorkel trip lives. Jacob’s Well is 6+ and its note explains why: “the water is 30+ feet deep at the well.” Hamilton Pool Preserve is 5+. Big Beach is 5+ with a warning about shore break. Electric Beach is 7+.

How to use this with mixed ages: pick your destination by your youngest swimmer, not your average. A 5+ spot with a two-year-old means one adult is on full-time containment duty and nobody has fun. A 1+ spot with a nine-year-old means the nine-year-old is bored - which is a much easier problem to solve, usually with a bodyboard or snorkel gear.

Only three entries mention life jackets - read all three

Life jackets appear in exactly three swimming notes, and the pattern is clean: deep water and moving water.

• Jacob’s Well - “life jackets are a good idea for younger swimmers - the water is 30+ feet deep”
• Broken Bow Lake - “life jackets for young kids”
• Comal River Tubing - “life jackets for kids - most outfitters include them free with tube rental”

The takeaway isn’t “life jackets are rarely needed.” It’s that the dataset only bothers to say it where the depth or the current makes it non-negotiable. Lake, river, or anywhere your kid can’t stand up: bring or rent them.

The shade problem is worse than you think

Eleven entries call for a shade tent, beach umbrella or shade structure, and ten of them are Hawaii beaches: Kailua Beach Park, Poipu Beach Park, Hapuna Beach, Papohaku Beach, Waimanalo Beach and more.

Galveston Island State Park makes the same call and tells you the catch: “a beach tent or shade structure (it is windy).” A pop-up shade on an open beach needs to be staked or it’s a kite. Sand anchors or a few extra stakes are the difference between shade and a forty-minute chase.

Freshwater swimming holes rarely need this, because they come with trees. Blue Hole just says “a blanket for the shaded lawn between swims.”

Two logistics notes that aren’t gear

Go in the morning. Fifteen of the 53 swimming entries with timing notes specifically say morning, and they give the same three reasons over and over: calmest water, best visibility, and parking. Hanauma Bay - “early morning for calmest water and parking.” Kahalu’u Beach Park - “morning for calmest, clearest water.” Poipu Beach Park - its parking note says the free lot “fills by mid-morning.”

Some places have nothing. A handful of entries end with “(no facilities nearby)” - Papohaku Beach and Keawa’ula (Yokohama Bay) both do. No snack bar, no water fountain, sometimes no bathroom. Read the parking and packing notes before you commit a toddler to a 45-minute drive.

The list

Every single time: towels (one per kid plus one spare), rub-on mineral sunscreen, swimsuits, drinking water.

Read the entry first: water shoes for rock, lava, limestone or river bottom - skip for sand. Life jackets for lakes, rivers and deep springs.

For the older kid at a younger kid’s beach: snorkel gear, bodyboard, sand toys for the small one. Thirty percent of swimming entries mention snorkel gear, almost all Hawaii.

Open beach, no trees: shade tent, plus stakes or sand anchors.

Always in the car: a change of dry clothes, a bag for wet things, and snacks - because “no facilities” is a real category.

More water: browse all our swimming adventures, or read our roundup of the best swimming holes in Texas for families.