How to read this: Maratua Resort is an independent concierge guide — we curate and compare dive resorts and island stays in the Derawan archipelago, then arrange your booking through a vetted operating partner. We do not own or operate the resorts, and resort or brand names are used only as neutral examples, not claims of affiliation. Prices are by quote and vary by resort, season and party; figures here are indicative. Flights, transfers and dive seasons change — confirm before you travel. This is general information, not a binding offer.
Derawan snorkeling spots are compact, shallow marine areas around the Derawan archipelago that are easy to access with mask, snorkel and fins, without scuba gear. Across Derawan, Maratua, Kakaban and Sangalaki you get turtles, mantas, reef walls and even a jellyfish lake, all within short boat rides of each other.
What makes snorkeling the Derawan islands special
The Derawan archipelago in East Kalimantan is a cluster of coral atolls and sand islands on the edge of the Makassar Strait. For snorkeling, four names matter most:
- Derawan Island – easy house-reef snorkel and resident turtles
- Kakaban – the famous stingless jellyfish lake plus outer reef
- Sangalaki – manta-cleaning shallows and turtle nesting beaches
- Maratua – a large atoll with reef flats and drop-offs accessible to snorkelers
Compared to more developed Indonesian destinations, Derawan stays relatively low-key. The trade‑off: fewer facilities and operators, but less crowding at the waterline and more of a “marine park first, tourism second” feel.
Key advantages for snorkelers:
- High chance of turtles in very shallow water around Derawan and Sangalaki
- Good visibility in the dry season (roughly May–October; always variable)
- Short boat runs between major snorkel points Maratua–Kakaban–Sangalaki
- Real variety: reef plateaus, walls, seagrass, mangroves and an inland lake
Limitations to be aware of:
- No formal “Derawan snorkeling map” is signposted on the ground; access is local‑knowledge based
- Weather and currents can make some outer‑reef sites unsuitable for beginners
- Conservation rules (especially at Kakaban and Sangalaki) are strict and enforced inconsistently – you benefit from going with a serious guide
Maratua Resort acts as an editorial guide and concierge across these islands. We are not the operator: we research and curate, then route serious enquiries to a vetted local partner; if you proceed with our partner they may pay us a referral fee at no extra cost to you.
For a tailored island‑hopping snorkel route, you can plan your trip with us or message WhatsApp +62 811 3823 875.
Derawan house reef snorkeling and turtles
Why Derawan’s house reef works so well for snorkelers
Derawan Island itself is a small, sandy island ringed by a shallow reef flat that drops to a gentle slope. Directly off the main village and many jetties you find:
- Seagrass beds favored by green turtles
- Coral bommies with reef fish in waist‑ to chest‑deep water
- Gradual depth changes, so non‑swimmers can stay very shallow along the shore
For many visitors, a Derawan house reef snorkel is the first and often the most relaxing marine experience of the trip. You can see turtles from shore and slide quietly into the water at high tide.
What you can expect on a typical Derawan house‑reef session (conditions permitting):
- Green turtles grazing or surfacing within a few meters of the jetty
- Juvenile reef fish, anemones and clownfish around coral patches
- Macro life (nudibranchs, shrimps) visible if you move slowly and have a good mask
Best access points for the Derawan house reef
There is no single “official” entry, but in practical terms:
- Village jetties: easy entry by ladder, useful at higher tides
- Resort/guesthouse jetties: often slightly quieter, with decent coral under the structures
- Northern and eastern shoreline: sand entries with shallower water, better for unsure swimmers at calm times
Tide timing matters. At very low tide some parts of the reef flat get too shallow for safe finning without coral contact. Aim for mid‑ to high tide to reduce the risk of unintentional coral kicks.
Turtle etiquette on the house reef
Turtles around Derawan are calm but not domestic animals. For genuine low‑impact encounters:
- Keep at least 3–5 meters away; never chase or block the path to the surface
- Do not touch, feed or ride turtles (you still see attempts; guides should intervene)
- Watch your fin tips over seagrass and coral to avoid scraping feeding areas
If you want more depth on turtle behaviour and conservation around these islands, see our dedicated turtles and snorkeling guide (internal link: Turtles/snorkel pillar).
Kakaban’s jellyfish lake and outer reef
Kakaban Island is best known for its inland jellyfish lake, one of a handful of such lakes globally. It is surrounded by a raised limestone ring and mangroves, with a dense suspension of jellyfish that have largely lost their sting through long isolation from predators.
Snorkeling Kakaban’s stingless jellyfish lake
Reaching the lake involves:
- A short boat ride to Kakaban’s jetty
- A walk up and over a wooden boardwalk and stairs through the forest (expect humidity and some steps)
At the lake itself:
- Snorkeling is usually without fins to reduce damage to jellyfish and fragile lake floor
- Life jackets are often required or recommended by local caretakers
- No sunscreen in the water – use long‑sleeve rashguards and leggings for sun protection
In the water you float among thousands of pulsing jellyfish. They brush against exposed skin with little or no noticeable sting for most people; extremely sensitive skin can still react, so keep that in mind.
Conservation‑minded behaviour in the lake:
- Do not lift jellyfish out of the water for photos
- Move with slow arm strokes to avoid collisions
- Avoid kicking up sediment from the shallow areas
Outer reef snorkel points around Kakaban
While the lake gets the headlines, Kakaban’s outer reef is one of the best snorkel sites in Derawan if conditions line up. These points are boat‑only and should be chosen carefully based on wind, swell and currents on the day.
Typical outer‑reef snorkel features:
- Reef terrace in 3–8 meters with hard corals and schooling fish
- Sudden drop‑off into deep blue water – excellent for spotting larger pelagics from the surface
- Clearer water compared to near‑village areas around Derawan
Because currents here can be strong and changeable, it is not ideal for first‑time snorkelers. A guide who understands local tides will:
- Choose leeward sides of the island on windy days
- Time entries around slack or slowing tides
- Use a float or small support boat nearby as a surface reference
Sangalaki: manta shallows and turtle zones
Sangalaki is small and low‑lying, famous for manta rays and as a historical turtle nesting area. Both experiences translate surprisingly well to the snorkel level.
Snorkeling with mantas in Sangalaki’s shallows
Mantas here tend to use shallow cleaning and feeding areas on sand and reef patches near the island. From the snorkel line you may see:
- Mantas circling above coral “cleaning stations” in 3–8 meters
- Rays gliding on the surface while feeding on plankton when conditions are right
- Turtles interspersed with mantas on some drifts
Reality check:
- Mantas are never guaranteed; plankton, currents and human presence all play a role
- Some days you may see none; other days several rays pass repeatedly
Better‑run manta snorkels manage boat approach and entry:
- Engines cut well before reaching the animals
- Guests slide quietly into the water on one side, avoiding blocking manta routes
- Guides brief on maintaining distance and staying low in the water column
Personal guidelines:
- Keep at least 4–5 meters horizontal distance
- Stay at the surface; do not repeatedly dive down in front of mantas
- Do not touch them – they are protected fishes; touching damages their skin mucus layer
Turtles and reef life around Sangalaki
Apart from mantas, Sangalaki’s lagoon and near‑shore reef flats hold:
- Resident turtles grazing in very shallow water
- Hard‑coral gardens and scattered bommies in 1–5 meters
- Juvenile reef sharks occasionally visible along the drop‑off edge
On land, Sangalaki historically had significant turtle nesting. Current nesting levels and access rules can change with management policies. If your operator offers a nesting‑beach visit, ask:
- Who manages the site access (local authorities, NGOs, or informal)
- What rules apply for lights, distances and group size
The goal is to minimise disturbance: no flashes on nesting turtles, no handling of hatchlings, and no crowding.
Maratua reef snorkeling
Maratua is a large atoll with villages, lagoons and long reef edges. It is primarily known among divers for walls and pelagics, but several snorkel points Maratua–Derawan wide work well with basic surface gear, especially along the inner reef and certain drop‑off shoulders.
Inner atoll edges and reef flats
Inside the Maratua atoll, sheltered areas often have:
- Coral gardens in 2–6 meters, suitable for confident snorkelers
- Sandy patches with sea cucumbers, garden eels and stingrays
- Occasional turtles and schooling fusiliers passing from deeper water
From some accommodations you can access a Maratua house‑reef style snorkel from the jetty or beach, in a similar way to Derawan but with deeper water nearby. Currents can be stronger than around Derawan village, so:
- Use a current check before venturing far from shore
- Stay in line with your entry point; do not let wind and current push you towards channel mouths
Drop‑off edges for advanced snorkelers
Along the outer wall of Maratua, divers focus on deep profiles, but surface snorkelers can still enjoy:
- Blue‑water views along the wall
- Passing turtles, bumphead parrotfish and occasionally larger fish schools
- Clearer water outside lagoon sediments
These sites are only appropriate for strong swimmers with confident boat entries and exits. Best practices:
- Always accompanied by a guide familiar with the specific site
- Float lines or surface marker buoys visible to the boat
- Entry chosen away from major current lines and down‑current hazards
If this sounds beyond your comfort level, focus on inner‑reef and jetty‑access sites instead. There is plenty of life without pushing into challenging conditions.
Comparing the main Derawan snorkeling spots
Below is a simple comparison of the four key areas from a snorkeler’s perspective:
| Area | Main highlight | Skill level | Access type | Typical depth range for snorkelers |
|---|---|---|---|---|
| Derawan Island | House reef with frequent turtles | Beginner–Intermediate | Shore / jetty | 1–6 m |
| Kakaban Lake | Stingless jellyfish lake | Beginner (with life jacket) | Boat + boardwalk + shore entry | 2–10 m (mostly mid‑water floating) |
| Kakaban Outer Reef | Reef terrace & drop‑off | Intermediate–Advanced | Boat only | 3–10 m above deep water |
| Sangalaki | Manta shallows & turtles | Beginner–Intermediate | Boat + short swims | 2–8 m |
| Maratua Inner Reef | Coral gardens inside atoll | Intermediate | Jetty / boat | 2–6 m |
| Maratua Outer Edge | Wall & blue‑water view | Advanced snorkeler | Boat only | Surface above 10 m+ |
Conservation, safety and practical tips
Reef‑safe behaviour and gear
The Derawan islands still have extensive live coral, but also areas of damage from past practices and unintentional contact. As a snorkeler you can either add pressure or help reduce it.
Simple rules:
- No standing or sitting on coral – only sand patches are safe to stand on
- Use a well‑fitting mask and simple, closed‑heel fins to minimise clumsy movements
- Choose reef‑safe sunscreen and apply at least 20–30 minutes before entering, or better, rely on UV‑blocking clothing
- Keep hands to yourself: no touching coral, turtles, mantas or other animals
Currents and conditions
This region is tidal and exposed to seasonal winds. Expect:
- Stronger currents near channel mouths and atolls edges
- Choppier surfaces and lower visibility during the wetter months or on windy days
You cannot control the sea, but you can manage how you interact with it:
- Be honest about your swimming ability
- Always snorkel with at least one other competent adult
- Wear a snorkel vest or compact flotation if unsure in deep water
- Listen carefully to local briefings – good guides adjust plans around conditions
Costs and logistics
Access around the archipelago is via boat day‑trips or multi‑night stays on different islands. Because fuel prices, local fees and boat sizes vary, so do prices.
As a broad, non‑binding guide (last verified June 2026):
- Shared day‑trips from Maratua to a combination of Kakaban + Sangalaki can fall in the range of IDR 900,000 – 1,500,000 per person, depending on group size and inclusions
- Shorter local snorkel outings (e.g., house‑reef guiding, nearby reefs) may start from IDR 300,000 – 700,000 per person
These are indicative; specific quotes depend on:
- Departure island and distance
- Private vs shared boat
- Number of snorkel stops, gear rental, guiding level, and conservation fees
We avoid publishing fixed operator names or “best deal” claims because quality and ownership change. Instead, we track which partners run safely and responsibly, and connect you once we understand your expectations. If you’d like that help, you can plan your trip with us or message WhatsApp +62 811 3823 875 for a current quote.
Building a simple Derawan snorkeling route
For first‑time visitors with snorkeling as the main focus, a simple structure works well:
Core 4–6 day snorkeling outline
- Day 1–2: Derawan Island
- House‑reef snorkels around jetties
- Easy turtle watching close to shore
- Day 3: Kakaban
- Morning at the jellyfish lake
- Afternoon outer‑reef snorkel if conditions and your skill level allow
- Day 4: Sangalaki
- Manta search and shallow‑reef snorkeling
- Turtle encounters likely but never guaranteed
- Day 5–6: Maratua
- Inner‑reef and jetty snorkeling
- Optional advanced outer‑edge drifts for strong snorkelers
You can reverse the order depending on your arrival route (Berau–Tanjung Batu–Derawan vs direct to Maratua) and flight schedules.
If you are also a diver, see our broader island‑hopping overview (internal link: Island hopping pillar) to understand how to combine dives and snorkels without over‑loading the schedule.
Who this region suits – and who might prefer elsewhere
Derawan and Maratua are ideal if you:
- Prioritise marine life over nightlife and large‑scale facilities
- Are comfortable with slightly longer transfers for quieter reefs
- Appreciate conservation rules, even when imperfectly applied
You might prefer more developed destinations (e.g. Bali, parts of Raja Ampat) if you:
- Need large hospitals and full‑service clinics close by
- Want guaranteed daily group excursions without pre‑planning in low season
- Prefer paved promenades, shopping and restaurant variety over simple island life
If your expectations match Derawan’s reality, the snorkeling can be quietly exceptional across a compact area.
FAQs on Derawan snorkeling spots
Is Derawan good for beginner snorkelers?
Yes, Derawan’s house reef and many beach entries are suitable for beginners in calm conditions. You still need basic swimming ability, a life jacket if unsure, and should start with short, guided sessions around jetties or protected shores before attempting outer reefs.
Can I see mantas and turtles while snorkeling, not diving?
In the Derawan area, turtles are commonly seen while snorkeling around Derawan and Sangalaki. Mantas at Sangalaki also use shallow areas where they can often be observed from the surface. Sightings are never guaranteed, but many visitors have manta and turtle encounters without scuba gear.
Is the Kakaban jellyfish lake safe for children?
Many families visit Kakaban’s jellyfish lake. Children who are comfortable in life jackets and can follow instructions usually do well. The main considerations are the hot, humid walk over the boardwalk, no fins policy in the lake, and the need for close adult supervision in deep water.
Do I need to bring my own snorkeling gear?
You can usually rent masks, snorkels and fins locally, but quality and fit vary. For hygiene and comfort, bringing at least your own mask and snorkel is advisable. Fins, rashguard and a simple snorkel vest are useful if you plan multiple days of snorkeling around the archipelago.
How many days should I plan for Derawan snorkeling?
A compact but satisfying overview needs around four full days on the islands, allowing you to visit Derawan, Kakaban and Sangalaki. Adding Maratua brings this to five or six days. This excludes travel time from the mainland, which typically occupies most of an arrival or departure day.