There are a handful of experiences in Palawan that stop you mid-sentence when you try to describe them later. Iwahig firefly watching is one of those. Picture yourself in a small wooden bangka, drifting through a pitch-black mangrove river, when suddenly the trees around you start blinking. Thousands of fireflies, synchronized and impossibly bright, turning the whole riverbank into something that looks like Christmas lights draped over the jungle.
Honestly, it sounds like something from a nature documentary. But it’s real, it’s in Puerto Princesa, and it costs less than ₱500 per person.
This guide covers everything you need to know before you go: how to get there, what the tour is actually like, what to wear, when to go, and how to make the most of your night on the Iwahig River.
What is Iwahig Firefly Watching?
Iwahig is a small community about 16 kilometers south of Puerto Princesa City. The area sits inside the Puerto Princesa Subterranean River National Park buffer zone, a UNESCO World Heritage Site, and its rivers wind through some of the most intact mangrove forests in all of Palawan.
Every evening after dark, the mangrove trees along the Iwahig River become home to massive colonies of synchronous fireflies (Pteroptyx tener). These aren’t the random blinking fireflies you see in a backyard. These ones flash together, in sync, like a living light show. Scientists believe the synchrony is a mating behavior, but honestly, when you’re sitting in a boat watching it happen, you stop caring about the science and just stare.
The tour itself is a simple river cruise by bangka at night. No loud music, no crowds, no light shows rigged to speakers. Just you, the river, and thousands of tiny lights.
How to Get to Iwahig from Puerto Princesa
Iwahig is about a 25 to 30-minute drive from Puerto Princesa City center. Here’s how to get there:
By Private Transfer or Van Hire
The easiest option, especially if you’re already doing a Puerto Princesa day tour. Most tour operators, including CMT, can arrange a van or multicab that picks you up from your hotel around 5:30 to 6:00 PM and brings you back after the tour ends (usually around 9:00 to 9:30 PM). Expect to pay ₱300 to ₱500 per person for the transport if it’s part of a group, or ₱1,500 to ₱2,500 total for a private multicab hire.
By Tricycle
If you’re going on your own, a tricycle from the city to Iwahig will cost around ₱200 to ₱300 one way. Just tell the driver “Iwahig firefly” and they’ll know exactly where to take you. Ask them to wait or arrange a pickup time for the return.
Joining a Group Tour
Many Puerto Princesa tour packages include the firefly tour as an add-on to the Puerto Princesa Underground River guide day trip. This is the most convenient option since transport is included and you’re already with a group. CMT can arrange this for you if you’re combining both activities.
What Happens During the Iwahig Firefly Tour
Here’s what the experience actually looks like from start to finish.
You arrive at the Iwahig River around dusk. There’s a small registration area where you pay your entrance fees and get assigned to a bangka. The boats hold around 6 to 8 people, and each one comes with a local guide who paddles you through the mangroves using a long bamboo pole. No motors. The silence is part of the experience.
The tour starts before it’s fully dark, so you get a few minutes to appreciate the mangrove forest in the fading light. Then, as the sky goes black, the fireflies start appearing. At first it’s just a few scattered flickers in the trees. Then more. Then suddenly you realize the entire treeline is blinking at you, all at the same rhythm.
The cruise lasts about 45 minutes to an hour. Your guide will sometimes stop the boat in spots where the firefly density is highest, and you’ll just float there in the dark, surrounded by light. People generally go very quiet at this point. (I’ve seen grown adults whispering like they’re in church, and honestly, that felt right.)
After the cruise, you return to the launch point. Some tour packages include dinner at a local restaurant near Iwahig before heading back to the city.
Insider tip: The best firefly density is usually midway through the route, about 20 minutes in. Tell your guide you want to slow down at that section. Some guides rush through it if they have another group waiting.
Iwahig Firefly Tour Prices 2026
Here’s a breakdown of the typical costs:
| Item | Approximate Cost |
|---|---|
| Entrance fee (per person) | ₱150 to ₱200 |
| Boat tour fee (per person) | ₱200 to ₱300 |
| Total firefly experience | ₱350 to ₱500 per person |
| Transport from PP City (group) | ₱300 to ₱500 per person |
| Transport from PP City (private multicab) | ₱1,500 to ₱2,500 total |
| Dinner at local resto (optional) | ₱150 to ₱300 per person |
These prices are based on 2026 rates and may vary slightly by operator. Booking through a local tour operator like CMT bundles the transport and tour into one package price, which is usually easier than arranging each part separately.
Best Time to Go for Iwahig Firefly Watching
Time of Night
Tours depart between 7:00 PM and 8:00 PM, once it’s fully dark. The fireflies are most active in the first two to three hours after sunset, so this timing is ideal. Don’t arrive too early expecting to see anything, and don’t arrive after 8:00 PM or you may miss the organized tours.
Best Season
Fireflies are present year-round in Iwahig, but the experience is better during the dry season, from November to May. During these months, the nights are clear, the water is calm, and the air is less muggy. That said, plenty of visitors do the tour in June to October during the wet season in Palawan and still have a great time. Rain can make the fireflies retreat deeper into the canopy, so a dry night is ideal.
According to PAGASA, Puerto Princesa’s dry season peaks between February and April, so this window gives you the best conditions overall.
Moon Phase
Here’s something most guides won’t tell you: a full moon actually reduces the visibility of fireflies because the ambient light competes with them. Book your tour on a new moon or cloudy night for the most dramatic effect. It makes a real difference.
What to Bring and What to Wear
The river is calm and the boats are stable, but you do want to dress appropriately:
- Long sleeves and pants: The mangroves are home to mosquitoes. Cover up. This is one tour where you will regret wearing shorts.
- Insect repellent: Apply before you get in the boat. DEET-based repellent works best.
- Dark-colored clothing: Bright colors and white shirts can attract insects and make it harder for your eyes to adjust to the dark.
- Closed shoes or sandals with straps: The ground near the launch area can be muddy.
- Small flashlight or phone torch: Useful before and after the cruise, but turn it off once you’re on the water. Light pollution affects the fireflies.
- Cash: Most firefly operators don’t take GCash. Bring small bills.
What NOT to bring: Skip the camera flash entirely. It disturbs the fireflies and disrupts the experience for everyone else in your boat. Your phone camera won’t capture much in the dark anyway.
Is the Iwahig Firefly Tour Worth It?
Short answer: yes, easily. At under ₱500 per person for the actual tour, it’s one of the best-value experiences in all of Palawan. If you’re already in Puerto Princesa for the Underground River, adding this to your itinerary is a no-brainer. You’re looking at one night, minimal cost, and an experience that most travelers say they think about long after the trip ends.
The only caveat: if you’re expecting a polished eco-resort with facilities, set your expectations accordingly. Iwahig is a community-based tourism program. The setup is simple. There may be a basic waiting area but not much else. That simplicity is part of what makes it feel genuine.
Want to compare it to other night activities in Palawan? Check out our Port Barton Palawan guide for more off-the-beaten-path experiences.
Combining Iwahig with Other Puerto Princesa Activities
Iwahig fits perfectly as an evening activity after a full day of sightseeing. Here’s how travelers usually combine it:
- Morning: Puerto Princesa Underground River or Palawan Wildlife Rescue Center
- Afternoon: City tour, Ugong Rock, or Honda Bay Island Hopping
- Evening: Iwahig Firefly Watching
If you’re planning a full Palawan trip that includes El Nido or Coron, Puerto Princesa often serves as a gateway. Our 5-day Palawan itinerary and 7-day Palawan itinerary both include Puerto Princesa stopovers that work well with an Iwahig night tour.
Many travelers also fly into Puerto Princesa and spend a day or two before heading north to El Nido. Cebu Pacific and Philippine Airlines both have regular flights from Manila to Puerto Princesa, making it a convenient entry point.
Responsible Tourism at Iwahig
The firefly colony at Iwahig exists because the mangrove forest has been largely protected. A few things to keep in mind:
- Don’t touch the mangrove leaves or branches. The fireflies live and lay eggs in the trees.
- No flash photography, ever.
- Keep your voice low once you’re on the water. Loud noise disrupts the insects and ruins the experience for others.
- Support community-based operators directly. The tour fees go to local families, not outside companies.
Iwahig is a good reminder that sustainable tourism and genuinely special experiences go hand in hand. Protect the place, and the place stays worth visiting.
FAQ: Iwahig Firefly Watching Puerto Princesa
Do I need to book the Iwahig firefly tour in advance?
During peak season (December to May), it’s a good idea to book at least a day ahead, especially if you need transport included. Off-peak, you can usually show up and join a tour the same evening.
What time does the Iwahig firefly tour start?
Tours typically start between 7:00 PM and 8:00 PM, once it’s fully dark. The whole experience including transport takes about 3 to 4 hours round trip from the city.
Is the Iwahig firefly tour safe?
Yes. The bangka boats are stable, the river is calm, and guides are experienced. Children can join as long as they can sit still in a boat. Lifejackets are usually available on request.
Can I take photos or videos of the fireflies?
You can record video on your phone without flash, but results are usually disappointing in very low light. Professional photographers with fast lenses and tripods have better luck. The rule is no flash, no bright lights of any kind.
How long is the actual boat ride during the firefly tour?
The boat cruise on the river lasts around 45 minutes to 1 hour. With arrival, registration, and the return journey, budget about 2 hours total at the site.
What if it rains during the tour?
Light rain usually doesn’t cancel the tour. Fireflies may be less visible if rain is heavy. Bring a light rain jacket just in case.
Is the Iwahig firefly tour good for kids?
Yes, it’s one of the most kid-friendly activities in Puerto Princesa. Just make sure little ones can stay calm and quiet in the boat. The experience tends to genuinely captivate children.
Planning your Puerto Princesa trip and want to include the Iwahig firefly tour? CMT can arrange your transport, tour booking, and a full Puerto Princesa day itinerary in one package. Book your Puerto Princesa tour with CMT and we’ll handle everything so you can focus on the experience.