Palau is a Pacific archipelago of roughly 340 islands where the underwater world takes center stage. Located east of the Philippines in Micronesia, this tiny nation is home to the UNESCO-listed Rock Islands Southern Lagoon, hundreds of species of coral, and marine encounters that draw divers from every corner of the globe. You can hook into a current at Blue Corner and watch grey reef sharks patrol just feet away, swim among millions of harmless golden jellyfish in a landlocked saltwater lake, or paddle a kayak through turquoise channels between jungle-topped limestone islets. Traditional Palauan culture runs deep here too, from carved storyboards that depict ancient folklore to the Palau Pledge stamped into every arriving passport, committing visitors to protect this fragile paradise.
Palau sits just north of the equator, so heat and humidity are constants year-round, with barely any temperature swing between seasons. That said, the dry season from roughly December through April is your strongest window. Rainfall drops to its lowest levels, seas flatten out, and underwater visibility can exceed 100 feet, making it prime time for diving and snorkeling the Rock Islands. Manta rays congregate at German Channel cleaning stations from January through April, and bumphead parrotfish stage dramatic spawning events around the March and April full moons. The tradeoff is higher visitor volume and accommodation rates, particularly around the December and January holidays and again in March. If you want fewer crowds and lower prices, consider the shoulder months of May or October, when conditions are still decent for water activities even as rain becomes more frequent. Just know that Palau's tropical heat, with highs near 88°F (31°C) every single month, never really lets up.
Spring in Palau
March through May spans Palau's transition from dry season into the onset of wetter weather, and these months split neatly into two moods. March is one of the driest months of the year, with significant rain falling only about 37% of the time, and the seas tend to be calm enough for smooth boat rides out to the Rock Islands. Visibility underwater is excellent, which is why many divers time their trips for this stretch. Bumphead parrotfish and groupers gather in large spawning aggregations around the full moons in March and April, and reef sharks often trail the action. At German Channel, manta ray activity remains strong through April, with divers regularly spotting them gliding into cleaning stations.
Highs average 88.8°F (31.6°C) with lows settling around 76.6°F (24.8°C), and the humidity hovers near 80%. You will feel the heat the moment you step off the plane, and it doesn't ease up after dark. Late April brings the season's peak temperatures, with highs reaching 89.3°F (31.8°C) and lows of 76.9°F (24.9°C). Pack lightweight, moisture-wicking clothing and reef-safe sunscreen, which is required by law in Palau. By May, showers pick up noticeably, with rain chances climbing to 59%. Tourism volume is fairly slow during this period, and you can often find deals on accommodations, especially in April when visitor numbers dip. Booking a Rock Islands tour through operators in Koror is straightforward, and the quieter conditions mean you may have Milky Way Lagoon's mineral-rich white mud bath or a snorkeling stop nearly to yourself.
Summer in Palau
June through August is the heart of Palau's wet season, and rain becomes a regular companion. June sees the highest rainfall frequency of the year, with showers on roughly two-thirds of days, and conditions remain soggy through July and August. Despite the weather, June is actually the busiest tourism month by volume, likely driven by school holiday schedules from key markets in Asia. Dive operators continue to run daily boats to Blue Corner, Ulong Channel, and the Rock Islands, but seas can be choppier, and visibility sometimes drops compared to the dry season. Nutrient-rich runoff does attract different marine life, though: macro enthusiasts may spot nudibranchs and pygmy seahorses more easily during these months.
Highs average 87.6°F (30.9°C) and lows sit at 76.1°F (24.5°C), which is technically Palau's coolest seasonal reading, though you'd be hard pressed to notice the difference. Humidity stays above 81%, and brief but intense downpours can roll through at any hour. Bring a lightweight rain jacket for boat transfers and keep electronics in dry bags. Accommodation rates run higher than usual given the visitor influx, so book well ahead if you're arriving in June. Afternoon showers typically clear within an hour, and the post-rain light filtering through the Rock Islands' jungle canopy can be spectacular for photography. Kayaking through Nikko Bay, where WWII-era wrecks sit beneath coral-encrusted limestone caves, remains accessible year-round and is a rewarding way to spend a day when open-ocean conditions are rougher.
Fall in Palau
September through November brings Palau's lowest visitor numbers, with September ranking as the quietest month of the year. If you're looking for solitude on the Rock Islands' beaches or want dive sites without the usual crowds, this is your window. Accommodation pricing drops to its most affordable levels. The tradeoff is weather: rain falls on roughly five to six days out of every seven-day stretch, and seas can be rough enough to limit access to outer reef dive sites like Peleliu Wall on some days. Inner sites and the sheltered Rock Islands lagoon remain reachable for most tours.
Highs average 88.2°F (31.2°C) and lows hold at 76.6°F (24.8°C), virtually identical to the rest of the year. The wet afternoons keep the islands lush and impossibly green, and waterfalls on Babeldaob, including Ngardmau, the tallest waterfall in Micronesia, run at full force. A hike to Ngardmau is worth a half day. On land, the Etpison Museum and Belau National Museum in Koror offer a solid introduction to Palauan history and culture, and the ancient Badrulchau Stone Monoliths on Babeldaob make for a fascinating detour. Late October and November begin the transition back toward drier conditions, and by November the red snapper spawning event around the full moon draws divers hoping to witness thousands of fish converging in moonlit waters. Pack quick-dry clothing and water shoes for the trail to Jellyfish Lake, which involves a short but sometimes slippery jungle hike.
Winter in Palau
December through February is widely considered Palau's prime diving season. Rainfall drops to its lowest levels, with February seeing significant rain only about 47% of the time and January close behind at 48%. Seas are at their calmest, underwater visibility regularly pushes past 30 meters, and the marine calendar is packed. Manta rays begin congregating at German Channel's cleaning stations by December, and sightings intensify through January and February. Around the December full moon, bumphead parrotfish gather in large schools to spawn, a dramatic event that also attracts reef sharks. WWII wreck dives, including the Japanese supply ships scattered around the inner lagoon, benefit from the improved visibility.
Highs average 88.1°F (31.2°C) with lows around 76.5°F (24.7°C), so the heat never relents, but the slightly lower humidity and occasional light breezes (February is the breeziest month) make it a touch more bearable. This is the second busiest tourism period, with December visitor numbers spiking around the holiday season. Booking flights and dive packages several months in advance is wise, as connections through Guam, Manila, and Taipei fill up fast. A scenic flight over the Rock Islands in a small plane is one of Palau's most memorable experiences, and the dry season's clearer skies give you the best chance of actually getting airborne, since flights are weather dependent. For a cultural detour, visit a traditional storyboard carving workshop in Koror, where artisans maintain the centuries-old craft of itabori, carving Palauan folklore into hardwood panels.
At a Glance
Monthly weather, visitor crowds, air quality, holidays, and daylight hours to help you plan your trip.
Travel Tips & Safety for Palau
Most visitors fly into Roman Tmetuchl International Airport on Koror, connecting through Guam, Manila, Taipei, Seoul, or Tokyo. There are no direct flights from mainland North America or Europe, so plan for at least one stopover. Palau uses the US dollar, and English is widely spoken alongside Palauan, making day-to-day logistics straightforward. Renting a car is the easiest way to explore Babeldaob island, but boat tours arranged through Koror-based operators are essential for reaching the Rock Islands, Jellyfish Lake, and most dive sites. You'll need a Rock Islands permit, purchased through authorized operators or the Koror State Rangers Office.
Palau is generally very safe for visitors, with low crime rates across the islands. The primary hazards are water-related: strong currents at outer reef dive sites like Blue Corner and Peleliu Cut can challenge inexperienced divers, and reef-safe sunscreen is legally required, so check your products before packing. Stay well hydrated in the tropical heat, and bring a reusable water bottle since single-use plastics are restricted.