5 Best Diving and Snorkeling Spots in Sardinia

If you’re planning a private yacht charter this season, the diving and snorkeling spots in Sardinia are reason enough to build your whole itinerary around this island. The water here runs turquoise in places you’d swear were photoshopped, and the best of it is barely reachable unless you arrive by boat. That’s exactly why it works so well for a charter. No crowds, no road access, just you, your guests, and some of the clearest water in the Mediterranean, with enough variety to keep both first-time snorkelers and certified divers happy on the same trip. 

Sardinia also has the advantage of distance. Unlike parts of the French Riviera or the Amalfi Coast, its best coves sit far enough from any road that day-trippers rarely bother, so a private yacht still feels like it has the water to itself even in July.

Here are the five spots worth anchoring near, what makes each one worth the detour, and the must-know details to check before you build them into a route.

Getting There

Where you base your charter changes which of these spots make sense. Olbia and Porto Cervo in the north put you close to the Maddalena Archipelago within an hour or two of leaving the marina, which is why most northern itineraries start there and why the Costa Smeralda stays the busiest embarkation point on the island. Cagliari works better if Villasimius and the Capo Carbonara reserve are the priority, since guests can fly straight in and be on the water the same afternoon, which matters when a client only has a week and doesn’t want to lose a day to transfers. 

Alghero is the quieter option for anyone building a route around Porto Conte and the Nereo Cave, with fewer charter yachts competing for the same anchorages and a more relaxed pace overall. None of these bases are far from each other by boat, so a broker with a flexible week can realistically string two or three together.

Best Time to Visit

Late May through September is the window that matters, but the character of the season changes a lot within it. June and September give you warm water and reliably good visibility without the crowds or the price spikes of peak summer, which makes them the sweet spot for guests who want the experience without the scramble for anchorages. July and August bring the warmest sea temperatures, often into the mid to high twenties Celsius, but also the busiest marinas and the tightest permit slots inside protected areas like the Maddalena Archipelago. 

Wind is the other factor worth planning around. The Mistral can pick up suddenly on the northwest coast near Alghero, while the Scirocco tends to affect the southeast more, so a flexible itinerary with a buffer day or two gives a captain room to reroute without cancelling a dive.

1. La Maddalena Archipelago

Start here if you only have one stop in you. This national park north of Olbia strings together islands like Budelli, Spargi, Razzoli, and Santa Maria, but the one everyone remembers is Cala Coticcio on Caprera, nicknamed “Tahiti” for water so clear it barely looks real. Dolphins pass through the channels between islands, and the sheltered inlets make this one of the easiest places to arrange a proper beach day for guests who’d rather sunbathe than swim. The archipelago also rewards a slower visit. Spend a full day moving between two or three islands rather than rushing through all seven, and the difference in how relaxed the trip feels is obvious by the second cove.

Must know:

• Best for: snorkeling and easy diving, plus a full beach day for non-swimmers
• Marine life: dolphins in the channels, groupers and seahorses in the sheltered inlets
• Good to know: some zones inside the park require a permit and have anchoring limits, so confirm current rules with the Parco Nazionale dell’Arcipelago di La Maddalena before you build it into a route

2. Gulf of Orosei

This is Sardinia at its wildest, and honestly its most photogenic. Limestone cliffs rise straight out of the water and drop just as fast beneath it, so the diving here leans toward dramatic rock walls rather than gentle shallows. Both coves worth knowing are reachable only by boat or a serious trek on foot, which keeps them quiet even in August, and the light through this water is some of the best on the island for underwater photos. What makes this stretch different from the rest of the list is scale. The cliffs run for miles with barely a building in sight, so guests get a genuine sense of remoteness that’s rare to find this close to a marina.

Must know:

• Best for: wall and drop-off diving, less suited to a casual snorkel
• Don’t miss: Cala Goloritzé and Cala Mariolu, both boat-access only
• Good to know: the seabed drops off quickly here, so check depth charts and keep a respectful distance from the cliffs when you anchor

3. Villasimius and Capo Carbonara Marine Protected Area

Just south of Cagliari, this stretch pairs an easy, family-friendly cove with a proper wreck dive, which is a rare combination. Certified divers get a genuine story to bring home, while everyone else can wade straight into calm, shallow water without any experience needed. Brokers like this one for a practical reason too, since it sits right along the route for guests flying in or out of Cagliari. It also tends to suit mixed groups particularly well, since a family with young kids and a guest who dives seriously can both have a great afternoon without anyone compromising.

Must know:

• Best for: an easy family snorkel and a proper wreck dive in the same anchorage
• Don’t miss: Porto Giunco for snorkeling, the Roma shipwreck for certified divers
• Good to know: closest spot on this list to Cagliari airport, an easy first or last stop without adding real time to the itinerary

4. Porto Conte and Capo Caccia

Near Alghero on the northwest coast, this regional park is where you go if your guests want a real dive centre nearby rather than a fully self-sufficient day. The headline attraction is one of the largest underwater cave systems in the Mediterranean, and local operators run guided trips inside it for guests who want more structure than a solo snorkel. Nearby coves offer a calmer option for anyone in the group who’d rather stay shallow. This is also a good stop if a guest wants to try diving for the first time, since instructors here are used to running short introductory sessions right off the boat rather than requiring a full certification course.

Must know:

• Best for: guided cave diving, with an easy snorkel option close by
• Don’t miss: the Nereo Cave, plus Cala del Bollo and Cala d’Inferno for calmer water
• Good to know: local dive centres run guided trips into the cave, useful for guests who want structure rather than a solo swim

5. Capo Testa

If your route runs north toward the Bonifacio Strait, Capo Testa is the natural last stop before you leave Sardinia. The granite here has been carved by wind into smooth, almost sculptural boulders, and the coves tucked between them are ideal for a relaxed snorkel rather than a technical dive. The anchorage is sheltered enough for a calm overnight, which makes it a nice bookend to a longer trip. It’s also one of the more photogenic spots on the list at golden hour, when the granite turns a warm pink that photographs better than almost anywhere else on this stretch of coast.

Must know:

• Best for: a relaxed snorkel among granite boulders, not a technical dive
• Marine life: castagnole and crabs, with the occasional octopus
• Good to know: the anchorage is calm enough for an overnight, so guests can swim early and still make good time on the crossing north

Diving Certifications and Gear

Most of these spots are just as good for snorkelers as they are for certified divers, but it’s worth checking a guest’s certification level before the trip rather than after you’ve already anchored. Marine protected areas like the Maddalena Archipelago and Capo Carbonara sometimes restrict diving to certified guests or require a local guide, while snorkeling stays open to everyone. 

If a guest wants to try diving for the first time, Porto Conte and Villasimius both have dive centres set up for short introductory sessions, which is an easier sell than asking someone to commit to a full course mid charter. For guests who already dive, most operators can meet the yacht at anchor with tanks and gear rather than requiring a trip back to a marina.

Planning Your Route

Trying to hit all five of these diving and snorkeling spots in Sardinia in one week usually backfires, since the island rewards a slower pace more than a packed schedule. Most brokers build a route around three or four, pairing an easy, family-friendly cove like Porto Giunco with something more serious like the Nereo Cave or the Roma wreck. A typical week might start in Olbia, spend two days around the Maddalena Archipelago, cross south for a night near the Gulf of Orosei, and finish with a day at Capo Carbonara before guests fly out of Cagliari, which covers a genuine range of diving and scenery without feeling rushed. It’s also worth building in one flexible day near the Maddalena Archipelago, since wind in this part of the Mediterranean can shift plans faster than guests expect, and a captain who knows the current permit rules for the park will save you a headache once you’re actually on the water.

If you want this exact route handled end to end, from permits to onboard dive guides, Silver Star Yachting’s Sardinia charter fleet is built for precisely this kind of itinerary.