Diving in Portugal (Azores) in May

Conditions in May

May in the Azores marks the delightful transition from spring to summer, offering divers a tantalizing glimpse of the incredible season to come. While still considered a shoulder month, the conditions are generally very favorable and often less crowded than the peak summer months. You can expect air temperatures to hover around a comfortable 18-22°C (64-72°F), perfect for enjoying your surface intervals between dives. The sea state is typically calm to moderate, though as with any ocean environment, unexpected swells can occur. Generally, however, you'll be treated to smooth sailing to and from dive sites.

Water temperature in May starts to climb, ranging from approximately 18-20°C (64-68°F). This is a very pleasant temperature compared to the colder winter months, making longer dives more comfortable. Visibility is often outstanding, reaching an impressive 20-30 meters (65-100 feet) or even more on a good day. The currents around the Azores can be variable, ranging from mild to strong, especially around offshore seamounts and islets. Experienced dive guides will always assess conditions for safety, but be prepared for potential drift dives, which can be exhilarating and reward you with fantastic pelagic encounters.

What you will see

May is a truly exciting time for marine life encounters in the Azores, especially for those with a keen eye for pelagic action. This month sees the beginning of the annual migration of several large species to these rich waters. You have a very good chance of encountering various species of whales and dolphins – including sperm whales, common dolphins, and bottlenose dolphins – particularly around the deeper waters and seamounts. While not a guaranteed sighting on every dive, the probability is certainly on the ascent in May.

Perhaps the biggest draw for many divers in May is the increasing presence of mobula rays (often referred to as 'devil rays'). These magnificent creatures begin to aggregate around the seamounts, offering incredible opportunities for close-up encounters. You might spot large schools of barracuda, impressive amberjacks, and various tuna species patrolling the blue. The volcanic rock formations also host a surprising array of macro life for those who enjoy the smaller details, including vibrant nudibranchs, colourful wrasses, and moray eels peeking out from crevices. Don't forget to keep an eye out for larger schooling fish forming impressive bait balls.

Top dive sites this month

For pelagic action in May, Santa Maria's offshore seamounts are an absolute must. Dive sites like the Formigas Islets and Dollabarat Bank are legendary for their abundant marine life, particularly the large schools of mobula rays that start to gather this month. The nutrient-rich waters here act as a magnet for these majestic animals, offering truly world-class encounters. Due to their offshore location and potential currents, these sites are best accessed via liveaboard or dedicated day trips with experienced operators, and are generally suited for more experienced divers.

Another fantastic option is the area around São Miguel, specifically the Ilhéu de Vila Franca do Campo. While not known for the same pelagic encounters as Formigas, this protected lagoon offers calmer conditions and a rich diversity of life in shallower waters, making it excellent for all experience levels. Further west, the seamounts west of Faial, such as the Condor Bank, also start to show promise for encountering larger open-ocean species like blue sharks as the water warms, making it an adventurous choice for those seeking big animal thrills.

Practical tips for your trip

Given the water temperature of 18-20°C (64-68°F) in May, a 7mm wetsuit is highly recommended for most divers to ensure comfort during multiple dives. For those who feel the cold easily, a semi-dry suit or even a dry suit (if you're certified) might be considered, though a good 7mm with a hooded vest is usually sufficient. This month is well-suited for both intermediate and advanced divers, especially for those venturing to offshore seamounts where currents can be a factor. Beginners can still enjoy the sheltered bays and calmer shore dives, but the prime pelagic action often requires a bit more experience.

Liveaboard availability in May can be good, as it's just before the peak season rush, potentially offering better rates and more choice. However, as the Azores is gaining popularity, it's always wise to book well in advance, especially if you have specific dates or a particular vessel in mind. Beyond your standard dive gear, consider packing a surface marker buoy (SMB) and a whistle, as these are beneficial for safety in any open ocean diving environment. A lightweight waterproof jacket for boat transfers and layers for evenings are also recommended. Remember, the weather can be a little unpredictable even in May, so flexibility and a good sense of humor go a long way when diving in the raw beauty of the Azores.