Conditions in March
March in Bali sits at the tail end of the wet season, presenting a mixed bag of conditions that can still offer incredible diving if you know where to go. While the monsoon rains are beginning to recede, you can still expect some afternoon showers, which generally don't impact underwater conditions too severely. Air temperatures are consistently warm, hovering around 28-32°C (82-90°F), making surface intervals very comfortable. Sea state can be variable; some days will be calm and glassy, particularly in sheltered bays, while others may see choppier conditions, especially on exposed sites or during periods of heavier rain.
Water temperatures during March are generally warm and pleasant. You can anticipate temperatures ranging from 26-29°C (79-84°F) across most dive sites. However, sites around Nusa Penida and Nusa Lembongan, known for their cooler upwellings, might occasionally dip to 24-26°C (75-79°F), particularly if thermoclines are present. Visibility is where March can be a bit more challenging. While excellent visibility of 20-30 meters is certainly possible on good days, particularly further from shore, you might encounter reduced visibility (10-15 meters) in some areas, especially after heavy rainfall or in shallower, silty bays. The good news is that these conditions are often localised, and moving to a different site can yield much clearer water.
Currents around Bali are a constant, and March is no exception. The Indonesian Throughflow ensures that certain dive sites, especially around the Nusa islands, will always experience moderate to strong currents. This is precisely what makes these sites so vibrant and teeming with marine life, but it also means drift diving is a common practice. Many dive operators are adept at navigating these currents, using them to provide thrilling dives. Always be prepared for varying current strengths, and listen carefully to your dive guide's briefings. These currents are also responsible for bringing in nutrient-rich water, which, while sometimes affecting visibility, is vital for the health of the coral reefs and the incredible biodiversity you'll encounter.
What you will see
March in Bali, despite being shoulder season, is a fantastic time for marine life encounters, especially for those seeking out pelagics and macro marvels. While the iconic Mola Mola (ocean sunfish) season typically peaks later in the year, you still have a chance of spotting them around Nusa Penida, albeit less frequently. The real stars of the show this month are the magnificent Manta Rays. Manta Point and throughout the Nusa Penida region offer consistent opportunities to witness these graceful giants at their cleaning stations, gliding effortlessly through the water. It’s a truly awe-inspiring experience that rarely disappoints. Additionally, reef sharks, including blacktip and whitetip reef sharks, are commonly seen patrolling the reefs, particularly at sites with stronger currents.
Beyond the larger animals, Bali’s reefs in March are teeming with an incredible array of critter life, making it a macro photographer's paradise. The celebrated muck diving sites, particularly around Padang Bai and Secret Bay (Gilimanuk), really shine this time of year. You can expect to find an abundance of rare and unusual species: various types of frogfish (including the hairy frogfish if you’re lucky), pygmy seahorses, flamboyant cuttlefish, mimic octopuses, blue-ringed octopuses, and a kaleidoscopic variety of nudibranchs. The slightly reduced visibility in some areas can actually enhance the focus on these smaller wonders, encouraging you to slow down and meticulously search the fascinating sandy and rocky bottoms.
Furthermore, thriving coral gardens are a constant feature of Bali's underwater landscape. In March, with the waters still warm and nutrient-rich, the hard and soft corals are vibrant and healthy, providing a colourful backdrop to all your encounters. Keep an eye out for schooling fish – snapper, fusiliers, and bannerfish are common sights, creating dazzling displays. Sea turtles, particularly green and hawksbill turtles, are also frequent visitors to Bali's reefs and can be spotted grazing peacefully. The overall biodiversity during March ensures that every dive offers something unique, whether it's a dramatic pelagic encounter or the discovery of a tiny, hidden gem.
Top dive sites this month
For consistent manta ray action in March, head straight to Manta Point and Manta Bay around Nusa Penida. These sites are renowned for their cleaning stations, almost guaranteeing encounters with these majestic creatures regardless of the season. While the currents can be strong, experienced local dive guides expertly navigate them, allowing you to observe the mantas as they gracefully loop and soar. The nearby drift dives of Crystal Bay, while sometimes still offering a chance for an early Mola Mola sighting, primarily impress with vibrant coral reefs and abundant fish life, including schooling batfish and snapper. Just be aware that Crystal Bay can experience significant thermoclines, bringing the water temperature down a few degrees.
If you're looking for world-class macro diving, March is an excellent time to explore Secret Bay (Gilimanuk). This legendary muck diving site rarely disappoints, providing endless opportunities to discover frogfish, nudibranchs, pipefish, and various octopuses in its silty waters. The calm, shallow conditions make it ideal for extended critter hunts. Another fantastic option for a mix of macro and reef diving is the USAT Liberty Wreck in Tulamben. This iconic wreck is accessible from shore and is absolutely teeming with life, from schooling bumphead parrotfish to pygmy seahorses on the fan corals. The wreck itself is a massive artificial reef, offering fantastic photographic opportunities and a relaxed diving experience, often with good visibility even during partial wet season conditions.
Practical tips for your trip
Given the warm water temperatures in March, a 3mm full wetsuit will likely be sufficient for most divers, offering good protection against minor abrasions and potential jellyfish stings. However, if you plan multiple dives around Nusa Penida, where thermoclines can bring temperatures down to 24-26°C (75-79°F), you might appreciate a 5mm suit or even a hood to stay comfortable. This month suits a wide range of divers. Beginners will find plenty of sheltered, calm sites like the USAT Liberty Wreck and parts of Padang Bai to build confidence, while experienced divers will relish the challenging currents and pelagic action around Nusa Penida and the unique macro opportunities of Gilimanuk. While specific liveaboard options directly from Bali can be limited in March compared to peak season, you can often find day trips and mini-safaris to dive regions like Nusa Penida, meaning you'll stay in resort accommodations on Bali or Nusa Lembongan.
When packing for a dive trip to Bali in March, definitely include lightweight, quick-drying clothing suitable for warm, humid conditions. A rain jacket or poncho is a good idea for sudden showers. Don't forget reef-safe sunscreen, a wide-brimmed hat, and insect repellent. As for dive gear, bringing your own mask, fins, and dive computer is always recommended for comfort and familiarity, though full gear rental is widely available. Be aware that currents can be strong, especially around Nusa Penida, so having good buoyancy control is crucial. Always dive with a reputable operator. Additionally, consider travel insurance that includes diving and medical evacuation, as Bali is a relatively remote location. Embrace the slightly more unpredictable weather, and you'll be rewarded with incredible diving and fewer crowds compared to the drier peak months.