On the northwest shore of Bonaire, the snorkeling at Boka Slagbaai offers exceptional marine life especially further out. From this scenic sandy beach, there are generally sand flats with lower visibility leading out to the wall edge. The sand flats do provide habitat to some marine life including stingrays, parrotfish, blue tangs, trunkfish, barracuda and french angelfish. The water depths range from shallows out to 20 feet deep at the wall edge.
The Boka Slagbaai snorkeling dive site is accessible from the scenic sandy beach or by boat at Buoy #6. While snorkeling Boka Slagbaai, most snorkelers enjoy the south side of the bay and the far north side. There are two real sunken cannons near the south point and plus another 6 concrete-casted cannon replicas scattered about for the filming of an old movie. On the north side, keep an eye out for one of the sunken cannon and the anchor chain.
To reach the Boka Slagbaai snorkelen dive site from Kralendijk, head northeast to Rincon. Continue north on paved roads following the signs to the Washington Slagbaai National Park. Once inside the park, the roads turn to rough dirt and are mainly one-way, one-lane roads. The Boka Slagbaai dive site is on the west side of the park along the coast -- it is marked on the free park map and is marked on the ground by a yellow labeled stone. The total travel time from Kralendijk is roughly an hour with the last 30 minutes on rough road.
Before snorkelen off Bonaire, it is important to remember that there have been two recent (relative to coral growth rates) storms. In 1999, Hurricane Lenny passed near the island resulting in the first big waves in over 100 years. This wave action over a 24 hour period had a severe effect on the shallow water corals on west-facing coastlines. There was significant toppling of the massive coral colonies, along with bleaching and smothering. Similarly, in 2008, Tropical Storm Omar passed near the island producing heavy wave action along west-facing coastlines. The effects of these storm, along with occasional bleaching events, have left many of the snorkeling dive sites not appearing as they had in past photos nor seeming as described in the brief locally printed snorkeling dive descriptions, which tend to be older. While snorkeling off Bonaire, you'll occasionally encounter some large, older coral formation remnamnts that give clues to the size of the past reefs. And, you may notice some small new growth occuring along the sand flats where new coral is taking hold in the cemented coral rubble, especially quick growing fire coral.
All of the offshore water of Bonaire has been long protected as part of the Bonaire National Marine Park. For several decades, the waters off Bonaire have been guarded to produce a pristine underwater environment offering a unique experience for snorkeling. With water visibility up to 100 feet, Bonaire snorkelers are treated to numerous varieties of coral and abundant marine life. The marine park has dozens of snorkeling dive sites marked by small yellow boulders along the road side and yellow or orange buoys offshore. The marine park requires all snorkelers in Bonaire waters to have an annual snorkeling license visible on their mask with the fees collected to continue protecting the waters (the fee can be paid at any dive shop). Should you happen to spot an lionfish, the Bonaire National Marine Park requests that you report any sightings of the invasive fish by calling them at (599) 717-8444.
Overall, Boka Slagbaai is the 8th most popular snorkel dive spot of all 20 snorkeling dives in Bonaire.