Diving in St. Maarten / Saba in May

Conditions in May

Diving St. Maarten and Saba in May offers a delightful transitionary period, bridging the drier, cooler months with the onset of summer. You’ll find the weather generally stable, with plenty of sunshine to enjoy your surface intervals. Air temperatures typically hover around a comfortable 28-30°C (82-86°F), making for pleasant topside conditions. While the trade winds are usually present, they tend to be generally lighter than in the peak winter months, leading to calmer sea states around both islands. This means fewer choppy boat rides and more comfortable entries and exits from the water. You can expect water temperatures to be wonderfully warm, averaging between 27-28°C (80-82°F). This means you might even contemplate diving in just a rash guard, or perhaps a thin 3mm shorty wetsuit for multiple dives, especially if you get cold easily.

Visibility during May remains consistently excellent, often stretching beyond 25-30 meters (80-100 feet) on most dive sites. The nutrient-rich waters that occasionally bring in larger pelagics don’t usually compromise the clarity at this time of year. Currents around St. Maarten tend to be mild, making for relaxed drift dives or easy explorations of wrecks and reefs. Saba, with its volcanic pinnacles and deeper waters, can experience stronger currents at times, particularly around exposed sites. However, these are generally manageable and often bring with them the most exciting marine life encounters. Always listen to your dive guide’s briefing regarding current strength and how to best navigate each specific site.

What you will see

May is a fantastic month for encountering a diverse range of marine life around St. Maarten and Saba. While not a peak pelagic season, you still have good chances of spotting reef sharks, particularly Caribbean reef sharks, cruising along deeper reef edges, especially around Saba’s pinnacles. Keep an eye out for barracuda schools, often seen shimmering in the blue. For macro enthusiasts, the reefs are teeming with activity: you'll find plenty of gobies, blennies, interesting nudibranchs, and various species of crab and shrimp tucked away in coral crevices. The vibrant healthy corals, especially around Saba, are a sight to behold, showcasing an incredible array of sponges, sea fans, and hard corals.

You might be lucky enough to spot green turtles and hawksbill turtles gracefully gliding through the water, as they are resident species here. Eagle rays are also a possibility, often seen soaring silently over sandy patches or along reef drop-offs. While less common in May than later in the year, sporadic sightings of manta rays do occur, particularly around Saba’s more exposed sites where they feed on plankton. Pay close attention to the smaller details too; octopuses are masters of camouflage but can be spotted if you’re patient, and various moray eels peer out from their rocky hideaways. The clear waters and thriving ecosystems make for constant discoveries on every dive.

Top dive sites this month

For St. Maarten, the wreck of the HMS Proselyte is an absolute must-dive in May. The calmer seas make exploring this historic frigate much more comfortable, and the shallower sections are bursting with vibrant reef life. It's an ideal site for both novice wreck divers and experienced enthusiasts. Another excellent choice is Creole Rock, a protected marine reserve that often boasts excellent visibility and a high concentration of schooling fish, making for fantastic photographic opportunities. The shallow reef here is also great for spotting juvenile fish and colourful sponges.

When you venture to Saba, the iconic Pinnacles are in prime condition during May. Sites like Man O’ War Shoals and Diamond Rock are awe-inspiring. These submerged volcanic peaks attract a wide variety of marine life, including pelagics, thanks to their exposure to currents. While currents can be present, the generally calmer surface conditions of May enhance the overall experience. Don't miss Third Encounter, a deeper pinnacle that often delivers exciting encounters with larger fish and robust coral formations. The unparalleled healthy reefs of Saba truly shine in the stable conditions of May.

Practical tips for your trip

Considering the warm water temperatures of 27-28°C (80-82°F) in May, a 3mm shorty wetsuit or even just a rash guard is usually sufficient for most divers. If you tend to get cold easily or plan on doing multiple dives a day, a full 3mm wetsuit might offer a bit more comfort. This month is incredibly well-suited for a wide range of divers, from beginners making their first open water dives on St. Maarten's shallower, calmer sites, to advanced divers looking to explore Saba's dramatic pinnacles and deeper reefs. The generally stable conditions make for an enjoyable experience for everyone.

Liveaboard availability is generally good in May, as it sits just before the peak summer and hurricane season, offering a sweet spot for securing a spot on a vessel that travels between St. Maarten and Saba. Booking in advance is always recommended, especially if you have specific dates or cabins in mind. Remember to pack light, breathable clothing for above deck, and always bring reef-safe sunscreen, a good hat, and sunglasses. Be aware that while tropical storms are rare in May, you should always keep an eye on weather forecasts, especially towards the latter half of the month, though the region generally remains outside the main hurricane track until later in the summer. Prepare for stunning visibility, warm waters, and abundant marine life this May!