Introduction: Why Diving in the Philippines Has Its Own Set of Challenges
The Philippines is often called the center of marine biodiversity, and for good reason. With over 7,000 islands, it offers some of the most spectacular diving on the planet—from coral gardens to dramatic walls, wrecks to macro muck. But over my years teaching here, I’ve noticed that even experienced divers can stumble when they hit Philippine waters. The conditions here are different: strong currents that shift without warning, busy dive sites with multiple boats, warm surface water layered over much cooler depths, and a tropical sun that drains you between dives.
This isn’t a list to scare you. It’s a practical guide to help you avoid the most common pitfalls I watch divers make, week after week. Some are safety-related, some are about protecting the reef, and others are just about making your dives more enjoyable. Either way, a little awareness goes a long way.
Mistake #1: Underestimating Currents and Tides
I’ve seen divers surface half a kilometer from their boat after drifting through a channel they thought was calm. The Philippines is notorious for tidal currents that can rip through passes and around reef edges, especially during full and new moons. Divers often check the surface conditions—flat, no waves—and assume the underwater current will be similar.
What to do instead: Ask your dive guide what the current pattern is at the specific site you’re visiting. Learn whether it’s a drift dive or a current hook situation. Listen carefully to the briefing about entry and exit points. If you’re not comfortable with strong current, mention it before you get in the water. And if you feel yourself being pushed away from the reef, stop kicking, conserve energy, and signal to your guide.
At sites like Apo Reef or Tubbataha, the current can change direction within minutes. Stay with your group, use a reef hook if conditions call for it (and you’re trained), and keep an eye on your depth.
Mistake #2: Poor Buoyancy Control Around Fragile Reefs
This one breaks my heart. I frequently see divers dragging fins across coral, kicking up sand that smothers polyps, or grabbing hold of rock or coral to stabilize themselves while taking a photo. The damage might not look dramatic to you, but that coral took decades to grow and can die from one clumsy touch.
What to do instead: Practice your buoyancy in a controlled environment before diving the reef. If you’re out of practice, do a refresher course. Keep your fins horizontal and use frog kicks instead of flutter kicks when you’re near the bottom. If you need to stop, hover. If you must touch something, find bare sand or rock—but even sand disturbance can kill nearby coral. The local diving community takes this seriously, and so should you.
Mistake #3: Ignoring Equipment Checks Before the Dive
The tropical sun and saltwater take a toll on gear, especially rental equipment. I’ve seen o-rings blow on the descent, tank valves left fully closed, and dry suits (yes, some people still wear them here) with valves in the wrong position. Many divers skip the buddy check because they’ve done it a hundred times before. That’s exactly when something goes wrong.
What to do instead: Before every dive, run through these three checks quickly but thoroughly:
- Open your tank valve fully and check your SPG reads full tank pressure.
- Test your second stage by purging it and taking a breath from it.
- Check your inflator by pressing the button to ensure it’s working and not free-flowing.
If you’re using rental gear, inspect the o-rings on the tank valve. A cracked o-ring is a common reason for a sudden pressure loss underwater. Also, double-check your computer settings—make sure it’s in the correct mode for air or nitrox, and that your PO2 limit isn’t set incorrectly.
Mistake #4: Overlooking Nitrogen Loading on Multiple Dives
Three-tank day trips are standard in the Philippines. You might do a deep wreck at 30 meters, then a shallow reef after a short surface interval, then another afternoon dive. It’s easy to push your no-decompression limits if you’re not tracking your profile carefully.
What to do instead: Use your dive computer properly. Start each day with a fresh memory, and don’t reset it between dives. Plan your surface intervals. A common pattern is 60 minutes between the first and second dives, and 90 minutes before the third. If you’re doing a deep dive early, follow it with a shallower one later. Stay conservative—pushing your NDL to the limit leaves no margin for error. And remember that repetitive diving, dehydration, and fatigue increase your risk of decompression sickness.
Mistake #5: Rushing the Descent or Ascent
Excitement or anxiety causes some divers to lose control of their descent and ascent rates. I see divers equalize too fast, causing ear pain, or ascend so quickly that they skip through decompression stops. On a busy wall dive, it’s easy to drift upward while focusing on the big sea fan below you.
What to do instead: The golden rule: ascend no faster than your smallest bubbles. For most divers, that’s around 9 to 10 meters per minute, but your computer will give you a specific safe ascent rate. On ascent, use a line or the reef as a reference to maintain your depth. If you’re using a dive computer, watch the ascent rate indicator. If you feel your ears during descent, stop descending, ascend slightly, and equalize slowly. Never force it.
| Depth (m) | Safe Ascent Time (min) |
|---|---|
| 30 | 3 |
| 20 | 2 |
| 10 | 1 |
Mistake #6: Not Hydrating or Eating Properly
The combination of tropical heat, sunshine, and repetitive diving is a recipe for dehydration. I’ve had divers complain of headaches, muscle cramps, and fatigue after the second dive, and it almost always comes down to not drinking enough water. Coffee and beer don’t count—they actually make it worse.
What to do instead: Start hydrating the night before your diving day. Aim for at least two liters of water spread throughout your dive day, not all at once. Avoid heavy, greasy meals before diving—stick to light carbohydrates and protein. I always carry electrolyte powder packets in my dive bag. If you feel a cramp starting underwater, signal to your buddy, ascend slightly, and stretch the muscle. A post-dive headache is usually a sign you’re dehydrated.
Mistake #7: Forgetting Sun Protection and Reapplication
The Philippine sun is intense, even on cloudy days. I see divers get burnt on the back of their legs, the tops of their feet, and the backs of their hands during surface intervals. Sunburn isn’t just painful—it can lead to overheating and fatigue, which compromise your diving safety.
What to do instead: Use reef-safe sunscreen that is free of oxybenzone and octinoxate. These chemicals harm coral and are banned in some areas of the Philippines. Apply it 15 minutes before you get in the water, and reapply after each dive, even if you’re just floating. Better yet, wear a rash guard or a full-length dive skin. Cover your head with a hat and use a towel to shield your legs between dives. Your skin will thank you, and so will the reef.
Mistake #8: Skipping the Dive Briefing
I see divers arrive late, adjust their gear, or start checking their cameras while the guide is explaining the entry point, current direction, and potential hazards. Then they get underwater and don’t know where to go or what to expect. This not only wastes time but can put you in danger.
What to do instead: Arrive at the briefing area with your gear set up but your mask off. Listen for these key details:
- Entry and exit points (specific landmarks)
- Maximum depth and bottom time
- Current direction and strength
- Local hazards (sharp objects, triggerfish nests, boat traffic)
- Hand signals for communication (e.g., “low on air,” “look at this”)
If you don’t understand something, ask. No one will think less of you for clarifying a detail that could affect your safety.
Mistake #9: Touching or Harassing Marine Life
I once saw a diver grab a turtle’s shell to get a closer photo. The turtle fled, but the diver didn’t realize that this stress can interrupt feeding, breeding, and migration patterns. Triggerfish will bite if you get too close to their nest. And coral polyps close their tentacles when touched, which means they stop feeding for the day.
What to do instead: Follow the “look but don’t touch” rule. If you want a photo, approach slowly and let the animal come to you. Never chase or block a marine animal. Many species in the Philippines are protected by local laws—disturbing them can result in fines. Beyond the legal aspect, it’s about respecting the environment that you’re privileged to visit. Keep your hands to yourself and your fin tips away from everything.
Mistake #10: Poor Logging and Dive Computer Management
After a week of liveaboard diving, many divers have no idea how many minutes they spent at each depth, or whether their computer stored the profiles correctly. I’ve seen divers start a new day with a no-fly time still counting down, or fail to download their dives until they get home and realize the data is lost.
What to do instead: If your dive computer has a memory download feature, save your dives at the end of each day. If you prefer a paper log, write down your depth, bottom time, starting and ending pressure, and any notable incidents before you forget. Many dive logs also include a section for air consumption, which can help you track your breathing rate over time. At minimum, reset your computer between trips—not just between days—so that your profiles aren’t mixed up. A simple free app like Subsurface or a written log is better than nothing.
Final Tips from an Instructor: What I Wish Every Diver Knew
Diving in the Philippines is a privilege. The reefs here are among the most alive on Earth, and they deserve our best behavior. If you take one thing from this list, let it be this: slow down, check your gear, listen to your guide, and respect the ocean. The conditions here can change quickly, but with preparation and awareness, you’ll have safer, more rewarding dives.
Next time you plan a trip, take a few minutes to review these basics before you gear up. Your safety, your dive buddies, and the reef will thank you. And if you have questions about a specific site or condition, ask your local dive shop. They see it every day.