There is a reason marine biologists talk about the northern Red Sea in a tone they use for almost nowhere else, and it has nothing to do with hotels.
Corals throughout the Red Sea share roughly the same thermal breaking point — around thirty-two degrees — regardless of how warm their local water normally runs. In the north, where the water is cooler, that means the corals are living a long way below their own physiological ceiling. The explanation is that they arrived through a thermal barrier at Bab el-Mandab about ten thousand years ago, and only the heat-tolerant made it through.
The consequence is measurable. Northern Red Sea corals have remained stable after six degrees above their maximum monthly mean for thirty-seven days. Under the harshest emissions scenario, the northern Red Sea is projected to warm by only two to two and a half degrees by 2100 — staying below the threshold. These are among the few reefs on earth with a plausible future.
The conditions
Water runs from about twenty-two degrees in February and March to about thirty or thirty-one in August. Visibility is commonly quoted at fifteen to thirty-five metres and better. Most operators put divers in a three-millimetre suit. PADI’s own description of Saudi Arabia notes at least two hundred species of coral and a healthy population of sharks.
Diving is possible year-round. The best of it runs November to May. Yanbu and the northern sites are at their best from June to September, and the Farasan Banks in the south from November to May.
What the science actually says about the reefs
It is worth being honest, because the marketing is not. A survey of fifty-nine reefs along the Saudi coast between 2014 and 2019 found hard coral cover at around ten metres averaging 17.5 per cent, with soft coral at 7.6 per cent. The southern reefs were richest, at nearly twenty-six per cent hard coral.
Then the 2015-16 bleaching arrived. Southern Saudi hard coral cover collapsed to 1.2 per cent and had recovered only to 3.6 per cent four years later. Soft coral fell from eight per cent to 0.3. Macroalgae rose from three per cent to nearly thirty-five: the reefs did not just lose coral, they changed state.
The northern reefs, through the same event, showed minimal change. In 2015 a site near Jeddah recorded thirty-five per cent bleaching while Yanbu recorded two.
This is the single most useful thing a diver planning a Saudi trip can know. Go north. The reefs there are not merely better; they are the ones with the scientific case for still being there in fifty years.
Source: Diego Delso, CC BY-SA 4.0, via Wikimedia Commons
The sites
Al Jadir, known as The Wall, is a fourteen-mile outer reef carrying something like thirty dive sites and ten coral-rich channels — the most concentrated diving on the coast.
The Seven Sisters, off Yanbu, is the reef complex most divers see first, and Abu Galawa within it is a coral grotto that draws schooling hammerheads.
Umm Blud, in the Al Wajh lagoon near Hanak, sits in the Ummahat archipelago and is the site the northern operators talk about.
For wrecks, the Ann Ann on Abu Faramesh reef is the best of them, lying with her stern at thirty-two metres and her bow at five — a single dive covering the whole depth range. The Boiler Wreck sits at eighteen metres, and the Miss Marie, Marble, Staphonos and Iona fill out the list.
And there is one site that is not a dive so much as an archaeological event. Off Umm Lajj, between the Al Wajh lagoon and Al-Hassan Island, lies a mid-eighteenth-century merchant ship at around twenty-two metres, carrying roughly a thousand calcified earthenware jars, Chinese blue-and-white porcelain and coffee beans. It has been protected by the Heritage Commission since 2015 and surveyed with the University of Naples L’Orientale. It is the Red Sea trade route, on the seabed, with the cargo still in it.
Source: Feefiona123, CC BY-SA 4.0, via Wikimedia Commons
What you will see
Eight shark species have been identified in the waters surveyed by Red Sea Global, hammerheads and tigers among them. Hammerheads are present year-round and school in groups of fifty and more. Grey reef and silky sharks are common. Turtles are year-round. Manta rays run June to October.
Whale sharks are the February-to-May event, peaking in April, and the reason is a site called Shib Habil — Rope Reef — off the Saudi coast. Research there monitored eighty-four individual whale sharks over six years in a roughly equal sex ratio, and identified it as a nursery: the only site in the Indian Ocean that regularly attracts large numbers of juvenile females.
The Al Wajh lagoon is a nursery too, for the critically endangered Halavi guitarfish, with newborns and juveniles recorded through most of the year across reef, mangrove, seagrass and sand down to sixty metres.
Who actually runs the boats
This is the constraint. Saudi Arabia has world-class reefs and a very thin dive industry, and that gap is the whole practical problem.
Red Sea Global operates its own diving through Galaxea, based at the St. Regis Red Sea Resort, under an associate director of dive operations, and has been surveying the area since 2021. If you are staying at the Red Sea destination, this is the sensible route and the boats go to reefs nobody else is on.
Liveaboards are scarce. Almonda is the vessel that is reliably bookable, running from Yanbu, Al Lith and Jeddah, with itineraries covering the Farasan Islands and Banks, the Seven Sisters, Rabigh and Abu Galawa.
For day boats, PADI-listed centres include Saudia Scuba and Dive Point in Jeddah, and Diving Bubbles, Adventure Diver and Scuba Diver in Yanbu. Yanbu is the diving town and Jeddah is the city with an airport.
Safety, and the thing to check before you go
Hyperbaric cover is limited. Dr Soliman Fakeeh Hospital in Jeddah operates a hyperbaric oxygen service that treats decompression illness and issues fitness-to-dive certificates. If you are diving remote northern sites or the Farasan Banks, understand your evacuation distance before you get on the boat, and dive conservatively — this is not the Egyptian Red Sea, where a chamber is an hour away in most directions.
The Saudi Red Sea Authority regulates marine tourism watercraft and issued a regulatory framework in August 2025 covering visiting vessels, safety standards and a strict prohibition on discharging waste, ballast or oils. Your operator handles this. Your job is to check that they are licensed.
Read also: The Red Sea sells itself as year-round. Winter is when it is actually good
Why it is worth the inconvenience
Egypt’s Red Sea is easier in every practical respect: more boats, more chambers, cheaper flights, thirty years of infrastructure. It is also dived by something like a million people a year.
Saudi Arabia has the same sea, the northern half of it, with a fraction of the traffic and a scientific case that its reefs are among the most likely on the planet to survive the century. What it does not yet have is the industry. Come now and the trade-off is genuinely uneven in your favour: harder logistics, better reef, nobody else on it.
Featured Image Source: Wusel007, CC BY-SA 3.0, via Wikimedia Commons
