Whale Sharks of Saleh Bay: A Complete Guide Before You Go

Saleh Bay is the largest bay on Sumbawa Island, covering roughly 1,459 square kilometres and connecting directly to the Flores Sea. But size isn't why whale sharks gather here. The real reason is much simpler, and far more interesting: fishermen's bagan platforms.

A bagan is a floating platform used by local fishermen. Every night, bright lights on the platform are switched on to draw in plankton, and the plankton in turn attracts small fish. When the nets are hauled up in the morning, some of the plankton and small fish escape into the surrounding water — and that's exactly where the whale sharks come to feed.

This pattern repeats almost daily, all year round. That's what sets Saleh Bay apart from most other whale shark destinations in the world, which are usually only accessible during a specific migration season. Here, the schedule is set by the fishermen's routine, not by the season.

Since 2018, Conservation International Indonesia has worked with the local community to develop the area as a community-based ecotourism site, complete with strict interaction rules to protect the whale shark population.

The departure time for a whale shark trip tends to catch people off guard: 2 a.m. if you're leaving from Sumbawa Besar, or 3:30 a.m. if you're staying overnight in Labuan Jambu. It sounds unreasonable — until you know why.

Whale sharks appear most often around 6 a.m., right when the fishermen start hauling in their nets. The trip from the village out to the bagan area itself takes about two hours by boat. If you're starting from Sumbawa Besar, add roughly three more hours of overland travel on top of that.

Count backwards from 6 a.m. and you'll land on exactly those departure times. It's not about making guests suffer — it's about being in the right place at the right time.

Whale sharks are listed as Endangered on the IUCN Red List. The rules below aren't just a formality — they're part of the area's operating permit, and they protect the animal as much as they protect you.

Whale sharks can technically be spotted year-round in Saleh Bay, but that doesn't mean every month is equally good.

April through November is the ideal window. The sea is calmer, the water clearer, and the bagan fishermen operate consistently. If your schedule is flexible, aim for this stretch.

January through March is best avoided. Weather is often unpredictable, waves can get fairly big, and many bagan fishermen stop going out — which naturally lowers your chances of an encounter. Trips can still run during this period, but confirmation is usually only given close to the departure date, depending on sea conditions.

We'd rather guests arrive with an honest picture of what to expect than feel let down on the day.

The fishing boats used in Saleh Bay are open, with no enclosed cabin. Bring sun protection and something warm for the morning. Accommodation in Labuan Jambu is homestay-level, not a star-rated hotel. Mobile signal can also be weak around the bay, so let your family know before you head out.

And most importantly: whale sharks are wild animals. The odds of an encounter in Saleh Bay are high thanks to the consistent bagan pattern, but nobody can guarantee it a hundred percent. Be wary of anyone who promises an absolute certainty.

Despite the word "shark" in its name, this animal doesn't prey on humans. Whale sharks are filter feeders — they take in seawater and filter out tiny organisms through their wide mouths. We're simply not on the menu, and there are no recorded whale shark attacks on humans.

They can grow to around 12 metres long and weigh up to 20 tonnes, making them the largest fish alive in the ocean today.

The pattern of white spots on their body is unique to each individual, much like a human fingerprint. Scientists use this pattern to identify and track specific whale sharks across different parts of the world.