How to Remember Snorkeling Spots
Here is how to remember snorkeling spots. Mark two things by GPS: the entry point where you got in and out, and the reef or the patch of good water itself. Then note the tide stage, the visibility, and what you saw. Save all of it in an app that works offline, and next trip you can put yourself back in the same water with zero bars. That is the whole method. The rest of this guide is the detail that makes it hold up.
A good reef does not announce itself from the surface. It is a dark shape among a dozen other dark shapes, and it only looks right at the correct tide. Mark it properly the first time and you stop swimming laps looking for the head you found last summer.
Why that reef is gone by your next trip
A reef is one of the harder spots to relocate, and it goes for a few plain reasons.
The surface hides everything. From up top, a coral head, a rubble patch, and a shadow of deep sand all read the same shade of blue-green. There are no fixed marks out over the water to steer by, so an area you swam for an hour is hard to pick out again from a moving boat or from the beach.
The tide changes the whole picture. The bommie that sat ten feet down and lit up at slack is a murky smudge on a running tide, and the fish and the turtles that made the spot worth it move with the water. If you did not write down the tide, you cannot even tell whether you are over the right patch or just early.
And you were only there once, months ago. Memory of open water fades fast. Getting close still matters, because from close you can drop your face in, read the bottom, and finish the swim to the exact ledge on your own.
How to remember snorkeling spots: mark two pins
The mistake is saving one pin. Save two.
Mark the entry first. This is where you can stand up and get in and out clean: the sand chute through the rocks, the gap in the reef, the ladder off the swim platform, the corner of the beach where the shore break is smallest. On a rocky coast the wrong entry means a scrape across urchins and fire coral, so the exact way in is worth as much as the reef.
Then mark the good water. Swim out, float directly over the coral head or the ledge or the grass edge where the fish were holding, and drop a pin from the surface. Keep the phone in a waterproof pouch on a lanyard and it is a two-second job. If you came by boat, mark the mooring right above the reef.
Your phone is accurate to roughly 10 to 16 feet under open sky, which is close enough to swim the last stretch by eye. A few things make the marks better:
- Mark on the surface, above the spot. A phone gets no fix once it is below the water, so drop the pin while you are floating on top of the spot.
- Save the entry and the reef as separate pins, and tag which is which, so shoulder season you are not guessing.
- If the swim out is long, drop a pin at the halfway turn too, so you can hold a straight line across featureless sand.
Note the tide, the viz, and what you saw
Coordinates get you over the reef. The notes tell you whether it is worth getting in.
Write down the tide: the stage, high or low, whether it was making or falling, and the time. Slack water usually gives the calmest, clearest swim. Write down the visibility in feet, because viz is the whole game for snorkeling and it swings with wind, swell, and runoff after rain. Then write down what you saw: a turtle grazing the sand ledge, an eagle ray off the drop, snapper stacked on the grass line. Over a season those notes teach you which reef to pick for which day, and which ones only fire on a clean incoming tide.
Getting back from shore or from the boat
How you return depends on where you launch.
From shore, use ranges to find your entry. Standing on the beach, line up two fixed objects one behind the other (a light pole behind a palm) and that line runs out through your gap. Walk the beach until the range lines up, get in there, then follow your saved bearing out to the reef pin. Ranges cost nothing and need no battery, though they only work in daylight within sight of land.
From the boat, run to the reef pin and watch the distance count down. A good log gives you a live bearing and distance to the saved spot, so you idle up on it instead of circling. Whatever you carry, make sure it works with no signal, because the best reefs sit off the grid where your bars drop to nothing. Save the map for the area once at the dock and it holds offline for the whole trip.
Keeping your spots off a public map
A quiet reef stops being quiet the moment it gets around. Snorkel spots get loved to death fast: post a geotagged photo of a turtle and the same corner has ten people on it by the next weekend, standing on the coral. The reef you keep is the one nobody else has the numbers for.
- Turn off the location tag on any photo or clip you post from the water.
- Keep your marks somewhere that stays on your own phone, not on a company's server where the spot becomes their data.
- Use a log with no feed, so nothing you save is ever broadcast to strangers.
- When someone asks where that was, keep it to the general stretch of coast.
Common questions
How accurate is a phone GPS for marking a reef?
A phone fixes your position to about 10 to 16 feet under open sky. That is close enough to put you back over the same coral head or ledge, where you can drop your face in and swim the last few yards to the exact spot.
Can I mark a reef while I am in the water?
Yes. Float on the surface directly over the good coral or the ledge, keep your phone in a waterproof pouch, and drop a pin. If you came by boat, it is easier to mark from the boat while you are anchored or moored right above it.
What tide is best for snorkeling a reef?
Slack water is usually best, high or low depending on the spot, because there is the least current and the clearest water. Note which stage worked when the viz was good, then time your next trip to match it.
Do I need signal to save or get back to a spot?
Not if your app works offline. Save the map for the area once while you have signal, and after that your pins, the map, and saving new pins all work with zero bars.
One tool that does this
Wakelog is a private logbook built for exactly this. You drop a pin in two taps and tag what it is (Snorkel, Dive, Anchor, Sandbar, Fish), and you can add the tide, the viz, and what you saw as a note. When you want to go back, its Take me back feature points a live bearing and distance to any saved spot. It points; you drive, and you still navigate the reef itself with proper charts. It works offline with zero bars, everything stays on your phone with no account and no feed, and you can export your spots to a JSON or GPX file, so nothing is ever locked in.
It's on the App Store for iPhone now: 14 days free, then $12.99 a year or $49.99 once for life. If you want the same reef next trip without swimming in circles, download it at getwakelog.com.