Blue Hole Dahab: Diving, Snorkelling & How to Visit (2026)
A 100m+ deep Red Sea sinkhole and coral wall, about 10km north of Dahab — world-famous for diving, and quietly...

An uninhabited island in the Straits of Tiran, ringed by four world-class reefs and reached on a full-day snorkel or dive boat from Sharm el Sheikh. Tiran sits where the Gulf of Aqaba narrows to a deep blue channel between the Sinai coast and the island itself, about an hour's sail from Sharm. It's the excursion we most often recommend to first-timers: four famous reefs within a short boat hop of each other, in water clear enough to see 25–30 metres down.
We run Tiran boat trips out of Sharm el Sheikh most weeks of the year, and it's the excursion we most often recommend to first-timers who want the Red Sea at its best without a long drive. The Straits of Tiran sit just an hour's sail north of Naama Bay, where the Gulf of Aqaba narrows to a deep blue channel between the Sinai coast and Tiran Island itself. What makes it special is simple: four of the most famous coral reefs in Egypt, all within a short boat hop of each other, in water so clear you can often see 30 metres straight down.
Tiran Island is a small, uninhabited island at the mouth of the Gulf of Aqaba, roughly 6 km off the tip of the Sinai Peninsula. The narrow stretch of water between the island and the mainland is the Straits of Tiran — a shipping channel so tight that vessels have to thread a careful line between the reefs, which is exactly why a couple of them still carry rusting shipwrecks today. The island itself is off-limits to tourists, so the whole experience happens on and under the water. Together with nearby Ras Mohammed at the southern tip of Sinai, Tiran forms the heart of Sharm's protected marine world.
Tell us when you can travel and we'll suggest the ideal route and season — usually within the hour.
Chat with a local expertThe straits are guarded by four coral reefs named in the 19th century after the cartographers who charted them. Each rises steeply from deep water, so you're snorkelling or diving over dramatic drop-offs draped in soft and hard coral, with clouds of reef fish, turtles, rays and — if you're lucky — dolphins passing through the blue. Most day boats moor at two or three of them.
You visit Tiran on a full-day boat trip from Sharm el Sheikh — there's no other way, since the reefs are offshore and the island is closed to visitors. Boats leave from the marinas around Naama Bay and Sharm's old port in the morning, sail about an hour to the straits, and anchor at two or three reefs so you have several hours in the water, with a hot lunch cooked on board in between. Our trips include hotel pickup and drop-off, all snorkelling gear, and a guide in the water with you; divers add a two- or three-dive package with tanks and weights. If you want a diver-led day rather than a snorkel cruise, book the dedicated scuba trip instead. Sharm el Sheikh day tours scuba diving in Sharm el Sheikh
★ Ready to see the reefs for yourself? Our Sharm el Sheikh day tours include the classic Tiran snorkelling boat trip with hotel pickup, lunch and gear — book a spot on the next departure. Browse our Sharm el Sheikh day tours Sharm el Sheikh day tours
We'll tell you honestly what the weather and crowds are really like for your travel dates.
Chat with a local expertTiran works brilliantly for both, which is why the same boats often carry snorkellers and divers together. Snorkellers get shallow coral gardens on the sheltered sides of Gordon and Thomas, teeming with fish just below the surface — no experience needed, and a guide keeps an eye on the group. Divers come for the walls and the drift dives: Jackson and Woodhouse in particular offer classic Red Sea drifts where you let the current carry you along the reef past fusiliers, snappers and the occasional reef shark. Visibility routinely tops 25–30 metres. If diving is your priority, Egypt's Red Sea is one of the world's great destinations, and Tiran is one of its highlights. scuba diving in Egypt
Local tip: the currents that make Tiran's dives so good can also leave the surface choppy. If you're prone to seasickness, take a tablet before you sail and pick a spot mid-deck — and snorkel at Gordon or Thomas, the two most sheltered reefs.
Tiran is a year-round trip, but the water is warmest and calmest from May to October, when sea temperatures sit around 26–28°C and you can snorkel comfortably for hours. Winter (December–February) is still very doable — the air stays warm and sunny — but the water cools to about 21–22°C, so a wetsuit or rash vest makes the day far more enjoyable. Whatever the season, the sun on the water is fierce, so pack for it.
This is one of the most family-friendly boat days in Sharm: children who can swim will love the shallow reefs, and nervous swimmers can float over the coral with a noodle or stay on board. It suits couples and groups after a relaxed day on the water just as much as it does serious divers chasing walls and drifts. The one group who should think twice is anyone who really dislikes boats, since you're at sea for most of the day. For a wider sense of how a Tiran day fits into a Sharm holiday, our things-to-do guide lays out the rest. things to do in Sharm el Sheikh
Most visitors pair Tiran with a second boat or desert day to round out a Sharm break. Ras Mohammed National Park, at the southern tip of Sinai, is the obvious partner — another world-class snorkelling and diving site, often sold as an alternative day on the water. On land, choosing the right base makes the boat days easier, and our where-to-stay guide covers the best areas near the marinas. To time your trip for the calmest seas and warmest water, check the best time to visit before you book. Ras Mohammed National Park where to stay in Sharm el Sheikh best time to visit Egypt
★ Want the reefs as part of a full Red Sea holiday? Our Red Sea travel packages build Tiran, Ras Mohammed and Sharm's best days into one seamless trip — flights, hotels, transfers and boats sorted. See our Red Sea travel packages Red Sea travel packages
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