By Sangalaki Diving Authority Theo Pereira · Theo Pereira, Founder & Editorial Director · Last reviewed June 2026

What You Need to Know About Turtle Nesting and Night Diving at Sangalaki Island

Sangalaki Island, a gem in Indonesia’s Derawan Archipelago, is renowned for its vibrant marine life and is a key destination for witnessing the extraordinary spectacle of turtle nesting. The island is home to the world’s highest density of green turtles, making it a prime location for both turtle conservation and exciting night dives. This guide provides an in-depth look into the turtle nesting season, diving opportunities, and conservation efforts on Sangalaki.

Sangalaki Turtle Nesting Season: A Natural Phenomenon

The Sangalaki turtle nesting season typically spans from April to September, with peak activity occurring between June and August. During this time, female turtles return to the sandy beaches of Sangalaki to lay their eggs, making it an extraordinary experience for nature enthusiasts and photographers alike.

As you wander along the powdery white shores, especially around the designated turtle nesting beach, you can often spot tracks in the sand, which indicate the arrival of these magnificent creatures. In 2026, the average cost for guided tours to witness the nesting process is approximately $30 per person (about 450,000 IDR), which includes a knowledgeable guide who follows strict rules for turtle nesting in the Sangalaki Marine Reserve.

Can You See Turtles Nesting at Sangalaki?

Yes, you can see turtles nesting at Sangalaki, but it’s essential to approach this experience with respect and awareness. The best time of night for turtle nesting on Sangalaki is usually between 10 PM and 2 AM. During these hours, the likelihood of encountering a nesting turtle increases significantly.

Visitors must adhere to specific rules for turtle nesting at the Sangalaki Marine Reserve to protect both the turtles and their eggs. This includes maintaining a safe distance, avoiding bright lights, and refraining from making loud noises. Guided tours often provide insights into the behaviors of nesting turtles, enhancing your understanding and appreciation of this beautiful event.

Night Dive Sangalaki Turtle Beach: An Unforgettable Experience

Night diving at Sangalaki Turtle Beach offers a unique perspective on the marine ecosystem. The dive depths here range from 10 to 30 meters, allowing divers to explore various underwater landscapes while keeping a lookout for the turtles that inhabit these waters. Night dives are generally scheduled between 7 PM and 10 PM, with prices averaging $75 (around 1,125,000 IDR) per dive.

Diving at night reveals an entirely different world, as many species of marine life, including manta rays and nocturnal fish, become active. Divers often report spotting bioluminescent organisms and vibrant coral formations that seem to come alive in the dark. The thrill of the dive is amplified by the anticipation of encountering a turtle, either swimming gracefully through the water or nesting on the beach.

Photography Guidelines for Sangalaki Turtles

For those eager to capture the beauty of Sangalaki’s turtles, specific photography guidelines are in place to ensure the well-being of these creatures. Here are some key points to consider:

Use Natural Light: Flash photography can startle nesting turtles, so rely on natural light whenever possible.
Keep Your Distance: Maintain a minimum distance of 10 meters from nesting turtles to avoid disturbing them.
Be Patient: Allow turtles to nest without interference; capturing the moment requires stillness and quiet.
Avoid Touching: Never touch a turtle, as this can cause stress and disrupt their natural behavior.

Following these guidelines not only helps protect turtles but also enhances the overall experience, allowing photographers to document the beauty of Sangalaki in a respectful manner.

Turtle Conservation Efforts at Sangalaki and Derawan

Turtle conservation in Sangalaki is a collaborative effort between local communities, NGOs, and the Indonesian government. The Sangalaki Marine Reserve has implemented several initiatives aimed at protecting the nesting sites and ensuring the survival of turtle populations. These efforts include:

Establishing protected nesting areas where human activity is limited.
Conducting regular patrols by local rangers to monitor nesting activity and deter poaching.
Raising awareness among tourists and locals about the importance of turtle conservation.
Encouraging eco-tourism practices that support conservation initiatives financially.

The conservation program has seen significant progress, and visitors to Sangalaki can participate in these efforts by choosing eco-friendly tour operators and following conservation guidelines while enjoying their time on the island.

Staying on Sangalaki for Turtle Hatching: Accommodation Options

If you’re interested in witnessing the hatching of turtle eggs, consider staying on Sangalaki. The best months to see this phenomenon are typically between August and October, as the eggs hatch roughly 60 days after they are laid. Accommodations on the island vary, from modest guesthouses to more luxurious eco-resorts.

Accommodation Type	Price (USD/IDR)	Features
Guesthouse	$30 / 450,000	Basic amenities, proximity to nesting beach
Eco-Resort	$100 / 1,500,000	Private bungalows, on-site dining, guided tours
Liveaboard	$200 / 3,000,000 (per night)	All-inclusive diving trips, multiple destination access

Staying on Sangalaki not only provides you with direct access to nesting beaches but also allows for spontaneous explorations and night dives. You’ll have the flexibility to participate in early morning hatching tours, which are often organized by local conservation groups.

Planning Your Trip: Logistics for Travelers

Planning a trip to Sangalaki Island is fairly straightforward, though there are some logistics to consider. Most travelers arrive via Balikpapan or Berau, located in East Kalimantan. From there, you’ll typically take a speedboat or charter a liveaboard to the island. The journey from Berau to Sangalaki usually takes about 2 to 3 hours and costs around $50 (750,000 IDR) per person.

When booking your trip, keep in mind the turtle nesting and hatching seasons to maximize your experience. It’s wise to reserve accommodations and diving tours well in advance, especially during peak months, as spaces can fill quickly.

Make sure to pack essentials, including sunscreen, a hat, and a good underwater camera if you’re planning to dive or photograph the turtles. Also, be prepared for the humid tropical climate, especially from June to September when temperatures can reach up to 32°C (90°F).

Frequently Asked Questions

1. What is the best time to see turtles nesting at Sangalaki?

The best time for turtle nesting at Sangalaki is typically between June and August, with peak activity occurring during the night between 10 PM and 2 AM.

2. Are there guided tours for turtle nesting and hatching?

Yes, guided tours are available, usually costing around $30 (450,000 IDR) per person, which includes a knowledgeable guide who will help ensure an ethical experience.

3. Can I dive at night in Sangalaki?

Absolutely! Night dives are a popular activity, with prices averaging $75 (1,125,000 IDR), allowing divers to experience the unique marine life that comes alive after dark.

With its stunning marine environment and commitment to conservation, Sangalaki Island is an ideal destination for nature lovers and diving enthusiasts. Plan your visit to experience the awe-inspiring sight of turtles nesting and hatching on its pristine shores.

Book your trip now and dive into the wonders of Sangalaki!

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This editorial briefing on Turtle Nesting And Night Diving At Sangalaki Island reflects current intelligence as of June 2026. Updated quarterly. For specific inquiries, contact the editorial team — senior analyst response within 24 hours during business hours.