For Starry Waters and Tiny Glowing Squids, Head to These Best Places to See Bioluminescence

Bioluminescence is a form of chemiluminescence, a cold light emission where less than 20% of the light generates thermal radiation. It occurs when a molecule called luciferin reacts with oxygen, catalyzed by an enzyme called luciferase. This reaction releases energy in the form of light. The evolutionary purposes behind this biological light show are diverse, ranging from attracting mates and luring prey to deterring predators and communicating within species. While most commonly associated with marine life, such as dinoflagellates (microscopic plankton), jellyfish, and certain fish, bioluminescence also manifests in terrestrial organisms like fireflies and, remarkably, glowworms in caves.

For travelers keen to witness this natural marvel, understanding its nuances is key. The intensity and visibility of bioluminescence are heavily dependent on factors like the moon phase (a new moon offers the darkest skies, enhancing the glow), water temperature, nutrient levels, and the absence of artificial light pollution. Moreover, while it is generally safe to touch and swim in bioluminescent waters, particularly in destinations where these sparkling waters are featured as tourist attractions with organized boat trips and excursions, caution is advised. Some bioluminescence can result from harmful algal blooms, commonly known as red tides, which can cause skin rashes or severe illness if ingested. When in doubt, thorough research of the specific area and consultation with local guides on organized trips are highly recommended to ensure a safe and unforgettable experience. Here, from the shores of Oaxaca in Mexico to Maldivian atolls via the British Isles, we reveal the best places to see bioluminescence in all its dazzling forms.

1. The Maldives

The picture-perfect islands of the Maldives are renowned as some of the best places to see bioluminescence around the world, primarily due to an abundance of plankton that illuminates the waves after sunset. This phenomenon, often referred to as the "Sea of Stars," is predominantly caused by species of dinoflagellates like Lingulodinium polyedrum or Pyrodinium bahamense. When agitated by the movement of waves, boats, or swimmers, these microscopic organisms emit a striking blue light, turning the shoreline into a celestial canvas. While it’s possible to see the phenomenon on islands across the archipelago, one of the most famous spots is on the quietest side of Vaadhoo Island, a minuscule island of the Raa Atoll known specifically for its beachy corner nicknamed the sea of stars. Here, the conditions are often pristine, with minimal light pollution allowing the natural glow to truly shine.

When to go: Between June and October. This period aligns with the southwest monsoon season, which brings nutrient-rich waters to the surface, encouraging the plankton to bloom more intensely.
How to get there: A domestic flight from Velana International Airport (MLE) in Malé, often followed by a scenic speedboat or seaplane transfer to your resort or a nearby island.
Where to stay: Vaadhoo Island itself typically lacks the honeymoon-esque luxury stays you may associate with the Maldives. For an unparalleled experience near the glowing waters, check into the InterContinental Maldives Maamunagau Resort. This luxurious sanctuary offers stunning villas and direct access to pristine beaches, allowing guests to appreciate the glowing waters just footsteps away from their beachside abode.

2. Mosquito Bay, Vieques, Puerto Rico

You may not have heard of the picturesque island of Vieques, but you’ve likely seen the spectacle that occurs after sundown, when Mosquito Bay transforms into a glossy, otherworldly blue portal. This incredible display is thanks to an exceptionally high concentration of the bioluminescent dinoflagellate Pyrodinium bahamense, which glows intensely blue when agitated. Mosquito Bay holds the Guinness World Record for the brightest bioluminescent bay, a title it maintains due to its unique ecological features: a narrow mouth protecting the bay from strong currents, abundant mangrove trees providing essential nutrients, and a consistent warm climate. Glide through the waters on a clear-bottomed kayak or an electric boat with a local tour operator for a truly mesmerizing and environmentally responsible experience. Swimming is often permitted and highly recommended for an immersive encounter with the glowing water.

When to go: December to April (dry season). During these months, there is less rainfall, which means less freshwater runoff diluting the bay’s salinity and the concentration of dinoflagellates, leading to brighter displays. Always check the moon calendar, as a new moon will offer the darkest skies and the most vibrant glow.
How to get there: Fly direct from San Juan’s Luis Muñoz Marín International Airport (SJU) to Antonio Rivera Rodríguez Airport (VQS) in Vieques, followed by a short taxi ride to the bay or a ferry from Fajardo (on the main island) to Vieques.
Where to stay: Go back to nature—albeit with luxurious trimmings—at the cozy Finca Victoria. This eco-boutique hotel offers a tranquil retreat amidst lush surroundings, aligning perfectly with the island’s natural allure and providing a comfortable base for your nighttime adventures.

3. Luminous Lagoon, Jamaica

Home to dinoflagellates aplenty, Jamaica’s Luminous Lagoon (also known as Glistening Waters) is one of the most incredible excursions on the island and a memorable way to shake up any evening itinerary. Located near Falmouth, this unique body of water is where the Martha Brae River meets the Caribbean Sea, creating a brackish environment ideal for the thriving Pyrodinium bahamense dinoflagellates. Scientists have noted that this lagoon boasts one of the highest concentrations of bioluminescent microorganisms in the world. Hop on a tour boat at sunset, and, soon enough, the water’s epipelagic zone will come alive with a vibrant blue light. Watch as sea life darts under the boat’s hull, leaving phantasmagoric lines of light in its wake. Should you choose, some tours allow you to hop into the (surprisingly shallow, typically three to eight feet deep) water and watch as your own movements create incredible displays of light around you.

When to go: December to April (dry season). Similar to Puerto Rico, the dry season ensures optimal salinity levels and clearer skies for viewing. The glow is particularly spectacular on moonless nights.
How to get there: Drive from Sangster International Airport (MBJ) in Montego Bay, which is approximately a 30-40 minute journey to Falmouth.
Where to stay: Kick back a 30-minute drive away from the spectacle with an indulgent all-inclusive stay at Sandals Royal Caribbean Resort and Private Island. This luxurious resort provides an excellent base for exploring the region’s natural wonders while enjoying world-class amenities.

4. Jervis Bay, New South Wales, Australia

Considering the length of its coastline and the abundance of wildlife that lies offshore, there are surprisingly few places to spot notable displays of bioluminescence around Australia. That said, places do exist, with Jervis Bay in New South Wales being one of the most famous. The phenomenon here is primarily caused by Noctiluca scintillans, commonly known as "sea sparkle," a species of dinoflagellate that can form dense blooms. As these microscopic organisms wash ashore or are disturbed by waves, they emit a dazzling blue-green light, creating an effect akin to the Northern Lights dancing on the shore. While not as consistently predictable as the Caribbean bays, Jervis Bay offers a unique opportunity for those lucky enough to witness it, transforming its pristine white sands into a luminous wonderland.

When to go: Summer; September to February. Warmer water temperatures during these months, combined with specific ocean currents, can trigger the blooms. The phenomenon is sporadic and often requires local knowledge or luck to catch.
How to get there: About a 2.5-hour scenic drive south of Sydney Airport (SYD), making it an accessible weekend escape from the city.
Where to stay: Escape the hustle and bustle of everyday life with a glamping trip like no other at Paperbark Camp. This eco-friendly luxury tented camp offers an immersive experience in nature, blending comfort with the raw beauty of the Australian bush, and is perfectly situated for exploring Jervis Bay’s natural attractions.

5. Krabi, Thailand

There are a few bays and coves in this popular region of Thailand that promise a watery light display on clear nights. The bioluminescence in Krabi is primarily attributed to dinoflagellates that thrive in its warm, nutrient-rich waters. Ao Nang Beach is one of the most famous and most accessible spots, with beachside hostels, restaurants, and bars offering places to hide out in ahead of nightfall. The agitated waters here, particularly after a boat passes or a swimmer takes a dip, can light up with an enchanting blue glow. While no less famous, perhaps, Phra Nang Beach is another spot a little further along the coast for a more peaceful, intimate bioluminescent session. Reaching Phra Nang Beach typically involves a scenic longtail boat transfer from Ao Nang Beach, allowing visitors to escape the crowds and experience the phenomenon in a more serene setting.

When to go: November to May. This is Thailand’s dry season, characterized by calm seas, clear skies, and less chance of rain, all of which contribute to optimal viewing conditions for the bioluminescence.
How to get there: A convenient 20-minute drive from Krabi International Airport (KBV).
Where to stay: Phulay Bay, a Ritz-Carlton Reserve, is just a 40-minute drive from the glistening waters. This ultra-luxury resort promises an exquisite escape, featuring lavish villas, sprawling pools, and access to dazzling beaches through its lush tropical landscape, providing a perfect blend of indulgence and natural beauty.

6. Toyama Bay, Japan

While many of the best places to see bioluminescence around the world are due to an abundance of glowing plankton and algae, the story is a little quirkier in Japan’s Toyama Bay come spring. Here, the bioluminescent performance atop the otherwise pitch-black Japanese waters is caused by a considerably larger creature—the firefly squid (Watasenia scintillans). These fascinating cephalopods, typically found at depths of several hundred meters, rise to the surface to spawn between March and June. During this period, particularly around the new moon, massive shoals of firefly squid can be seen. Join a specialized fishing trip, and watch as the organisms emit brilliant blue light from photophores located on their arms and bodies, creating a wet and wild firework display as they are pulled from the icy depths. The Uozu Buried Forest Museum also offers displays and boat tours dedicated to this unique phenomenon.

When to go: April – May. This is the peak spawning season for the firefly squid, making sightings most probable.
How to get there: The Hokuriku Shinkansen bullet train from Tokyo offers a fast and comfortable journey to Toyama.
Where to stay: The DoubleTree by Hilton Toyama is a perfectly plush spot to rest in between city exploration and bay visits. Its central location offers convenience and modern comforts, ideal for travelers keen to experience both urban amenities and natural wonders.

7. Oaxaca, Mexico

One of the most popular places to visit for bioluminescence in Mexico is the Laguna de Manialtepec, a coastal lagoon located approximately 10 miles west of Puerto Escondido. The glowing waters here are caused by a high concentration of dinoflagellates that flourish in the lagoon’s brackish environment. As fish (and people braving the water for a dip) dart through the waters, the twinkling algae that call the lagoon home make the water turn fantastically phosphorescent. The experience often involves a tranquil boat ride through mangrove channels, culminating in an unforgettable swim in the glowing lagoon. A little farther along the coast, similar, albeit often less crowded, experiences are available at Lagunas de Chacahua, offering another opportunity for this magical encounter.

When to go: July to October (rainy season). While counterintuitive, the increased freshwater runoff during the rainy season brings essential nutrients into the lagoon, stimulating plankton growth and leading to more vibrant bioluminescent displays. Dark, moonless nights are crucial for the best visibility.
How to get there: Fly to Oaxaca Xoxocotlan International Airport (OAX), typically via Mexico City, then take a connecting flight or a bus to Puerto Escondido. From Puerto Escondido, local tours to Laguna de Manialtepec are readily available.
Where to stay: You’re spoiled for choice along this stretch of Mexican coastline. Consider the earthen Hotel Escondido Oaxaca for a chic, rustic-luxury experience right on the beach, or the eclectic Grana B&B in Puerto Escondido for a charming and authentic stay that serves as an excellent base for exploring the region.

8. Koh Rong, Cambodia

By day, the Cambodian island of Koh Rong is a natural playground for families and couples who take to the water armed with snorkeling gear, looking down at the vibrant sea life below. By night, the waters beyond the powder-soft sands take on a life of their own, akin to a starry sky beyond the resorts and lush vegetation. The bioluminescent plankton here, common in many tropical waters, create a stunning display when disturbed. While the bioluminescent plankton isn’t unique to Koh Rong—you can spot it on other Cambodian isles—the lack of significant light pollution around these shores makes nighttime beach strolls and boat excursions under the new moon truly unforgettable. The best way to experience it is to join a local tour, often involving a short boat ride to a secluded cove where the darkness enhances the glow.

When to go: November to May. This is Cambodia’s dry season, offering clear skies, calm waters, and ideal conditions for stargazing and bioluminescence viewing.
How to get there: Fly to Phnom Penh International Airport (PNH), then catch a bus to Sihanoukville port, and finally, a fast ferry or slow boat transfer to Koh Rong island.
Where to stay: The Royal Sands Koh Rong is the plushest address on this gorgeous island. Offering luxurious villas with private pools and direct beach access, it provides an exquisite retreat where guests can enjoy comfort and elegance amidst the island’s natural splendor.

9. Cornwall, England

The waters that surround the British Isles aren’t the first that come to mind when you think of the best places to see bioluminescence. However, come summer, the English Channel throws a few surprises upon Cornwall’s shores. The phenomenon here is again primarily due to Noctiluca scintillans, or sea sparkle. Some of the most notable places to spot starry shores in this corner of the world include Grebe Beach, a hidden gem at the end of the Helford River. On balmy nights, the water can turn a luminescent blue with a splash, revealing the microscopic organisms. Elsewhere, in Penzance, the bioluminescent action is best observed at Pedn Vounder, where, a few times a year, the Channel puts on a spectacular display under the constellations. Witnessing this elusive glow requires patience, very dark conditions (away from any light pollution), and a bit of luck, but the reward is a truly magical and unexpected sight in the UK.

When to go: July and August. These are the warmest months in Cornwall, which can encourage the growth of the bioluminescent plankton. Calm evenings and low tide on a new moon are the most favorable conditions.
How to get there: A five or six-hour drive from London’s Heathrow Airport (LHR), or take a direct train to Truro or Penzance and then local transport.
Where to stay: In Falmouth, The Greenbank Hotel, a charming waterside retreat with stunning harbor views, gets our vote. In Penzance, hang out with the cool crowd at Artist Residence Cornwall, where unique, art-filled bedrooms are set within a storied 17th-century property, offering a blend of history and contemporary style.

10. Cat Ba Island, Vietnam

The region around Vietnam’s Halong Bay has long been a hotspot for those seeking glowing waters. However, being one of the stops on most travelers’ bucket lists, crowds and light pollution from boats and cruise ships mean the starry displays are notably more striking in the quieter coves and bays. Enter Cat Ba Island’s beaches, where splashes at sea equate to dazzling scenes of bioluminescent plankton. Located on the southeastern edge of Halong Bay, Cat Ba offers a more secluded and authentic experience. The natural wonder is best experienced on an overnight boat tour, as captains typically anchor in quiet spots under sparkling skies, far from artificial lights. Kayaking through these glowing waters after dark provides an intimate and unforgettable connection with nature.

When to go: June to October. These months fall within Vietnam’s summer and early autumn, bringing warmer waters and sometimes more plankton blooms, though clear, moonless nights remain paramount for optimal viewing.
How to get there: Bus transfers from Noi Bai International Airport (HAN) in Hanoi to Hai Phong, followed by a ferry or speedboat to Cat Ba Island.
Where to stay: Why not take over your own incredible villa while soaking up the island’s tranquil vibe? Valía Villa Cat Ba offers a private and luxurious retreat, perfect for families or groups seeking an exclusive base from which to explore the island’s natural beauty and its glowing waters.

11. Waitomo Glowworm Caves, New Zealand

Instead of a swimsuit, pair of flippers, or a kayak, the bioluminescence hiding in one of New Zealand’s most recognizable natural wonders requires visitors to wear comfortable shoes and a warm jacket. The Waitomo Glowworm Caves have been a world-famous tourist attraction for more than 130 years, drawing visitors from across the globe. Travelers pass through the awe-inspiring caves in silence, often by boat on an underground river, watching as the Arachnocampa luminosa glowworm species—only found in this part of the world—show off their captivating colors. Thousands of these tiny creatures adhere to the cave ceilings, creating a living galaxy of blue-green light that mirrors a starry night sky, but deep underground. This terrestrial form of bioluminescence is a stark, yet equally mesmerizing, contrast to its marine counterparts.

When to go: Year-round. The controlled environment of the caves means the glowworms are visible regardless of external weather or season.
How to get there: About 120 miles south of Auckland Airport (AKL). Many tour operators offer day trips from Auckland or Rotorua, or you can drive there directly.
Where to stay: Assuming you’re based in Hamilton, about an hour’s drive north of the caves, for a few days, check into The Narrows Landing Hotel. This boutique hotel offers a blend of historic charm and modern luxury, making it a convenient and comfortable base for day trips to the Waitomo Caves and other regional attractions.

From the shimmering shores of tropical paradises to the hidden depths of ancient caves, bioluminescence offers a profound reminder of the planet’s extraordinary natural artistry. Each location provides a unique context for this dazzling phenomenon, inviting travelers to step into a world where light is born from life itself. Whether a vibrant blue plankton bloom in the ocean or the quiet sparkle of glowworms underground, these experiences are not just sights but unforgettable encounters that connect us more deeply with the magic of the natural world. Responsible tourism practices, such as choosing eco-friendly tours and respecting local guidelines, ensure that these incredible light shows can continue to enchant generations to come.