Oman's first marine nature reserve (declared 1996), a chain of nine uninhabited islands roughly 18 km off the Al Batinah coast near Muscat, offering easy coral-and-boulder reef diving with seasonal summer whale sharks, year-round green and hawksbill turtles, leopard sharks, and dense schooling fish.
Destination info
Conditions, highlights, and the resident marine life.
Conditions
Water and air temperature across the year.
WaterAirDryShoulderWet
Description
The Daymaniyat (Ad Dimaniyat) Islands are nine barren, beach-fringed islands and associated islets in the Gulf of Oman, lying about 18 km offshore from Barka in Muscat Governorate and reached by a 40–60 minute boat ride from Al Mouj or Seeb marinas. Declared Oman's first marine nature reserve by Royal Decree in 1996, the archipelago is split into western, central and eastern groups holding more than 20 named dive sites, most of them gentle wall, boulder and coral-garden dives in 5–25 m with usually mild currents — making it one of the most accessible and beginner-friendly destinations in the Middle East. Water is warm and clear in winter (20–22°C, 10–20 m visibility) and warmer but greener in summer (29–31°C) when nutrient-rich upwelling drives plankton blooms; those blooms draw whale sharks (Rhincodon typus), which a peer-reviewed Arabian-region photo-ID study confirmed aggregate here mainly April–October, with 115 individuals catalogued at the Daymaniyats. The reserve also protects nesting green and hawksbill turtles plus large seabird colonies, so landing on the islands is closed each year from May through October — but diving and snorkelling in the surrounding water continue year-round, and summer is precisely when whale sharks pass through. Resident highlights include green turtles, leopard (zebra) sharks resting on the sand, blacktip reef sharks, honeycomb morays, and big schools of snapper and fusilier.
Highlights
What makes this dive worth the trip.
A peer-reviewed photo-identification study (Robinson et al., PLOS ONE 2016) catalogued 115 individual whale sharks (Rhincodon typus) at the Daymaniyat Islands, with surface-feeding aggregations reported mainly from April to October; encounters clustered at the 'Junn', 'Aquarium' and 'Sira' dive sites.
The Daymaniyats are Oman's first marine nature reserve, established by Royal Decree in 1996 across an archipelago of nine islands roughly 18 km off the Barka coast; entry requires a permit from the Environment Authority (visit-and-dive permits start at OMR 6/day for foreign adults).
Landing on the islands is prohibited from the beginning of May until the end of October each year to protect nesting green and hawksbill turtles (around 250–300 hawksbills nest annually) and seabird colonies — but diving and snorkelling in the surrounding water continue year-round, and this closed season coincides with peak whale-shark season.
Marine life
37 species you’re likely to encounter on a dive here.
Dive sites
6 signature sites at this destination.
Aquarium North
An underwater rock lying about 4 km south of the easternmost island (Hayut), dived from a buoy/anchor on the top at around 7 m. Divers descend a sand chute and follow the wall to a small plateau at 22–24 m before working back up to a 12 m shelf. The site earns its name from huge shoals of snapper, groups of angelfish and batfish, honeycomb morays, anemonefish and turtles, and is one of the dive sites where whale sharks have been recorded during the summer aggregation.
7–24 mintermediateDay boatModerateVisibility 10–20 m
Police Run
On the western side of the main bay (Al Jabal Al Kabeer), a wall dive whose signature feature is a pair of swim-throughs on a section of wall that juts out at about 16 m. The passages are quite narrow and the floor is dotted with sea urchins, so careful buoyancy is needed. Rays (including the round ribbontail ray) and turtles shelter around the structure; current is usually light.
5–18 mintermediateDay boatLightVisibility 10–20 m
Hayut Run
On the north side of Hayut island, one of the few Daymaniyat sites where the walls drop to 25–28 m, making it the deepest dive in the reserve. The wall is broken by numerous overhangs that need a torch to explore, and the dive finishes in a soft-coral garden around the western corner of the island. Suited to divers comfortable below 20 m.
10–28 mintermediateDay boatModerateVisibility 10–20 m
Three Sisters
A relaxed wall-and-coral-garden dive on the eastern side of the main bay (Al Jabal Al Kabeer), named for a cluster of rocky outcrops. Diving runs along a wall studded with large boulders covered in hard and soft corals, opening onto flat coral gardens of table corals teeming with small reef fish, to a maximum of about 18 m. A small cave at around 10–12 m is packed with glassfish/sweepers, and current is normally mild, making it a good site for newer divers.
5–18 mbeginnerDay boatLightVisibility 10–20 m
Garden of Eden
On the western tip of Qesmah island, this dive starts on a wall on the northern side and finishes over sand. Divers follow a steep wall between boulders past two small plateaus that jut out at 10 and 12 m. The sandy stretch is the highlight: stingrays lie buried with only their eyes showing, and leopard (zebra) sharks — large brown spotted sharks — are sometimes found resting on the bottom. Current is generally light.
5–20 mbeginnerDay boatLightVisibility 10–20 m
Black Tip Reef
A scenic central-group site where huge coral blocks rise like towers out of the blue. Large schools of snapper swarm around the coral heads, and the reef leads onto a wall with a broad plateau at about 18 m carpeted in coral bushes. Rays — including the Jenkins' whipray — lie half-hidden against the wall, and blacktip reef sharks patrol the reef. Generally easy conditions with light to moderate current.
5–18 mbeginnerDay boatLightVisibility 10–20 m
Where to dive & stay
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