Swimming at Cala Mariolu is generally very safe due to the cove's sheltered location and exceptional water clarity. The beach is protected by surrounding cliffs, which minimize currents and waves. The distinctive small white pebbles make for a comfortable seabed, though water shoes can be helpful. The water deepens gradually near the shore, suitable for most swimmers. The remarkable clarity allows you to easily see the bottom, adding to the sense of safety. However, the rounded pebbles can be slippery when wet, so take care when entering and exiting the water.

The optimal time to visit Cala Mariolu is during June or September when weather is excellent but crowds are lighter than peak August. For daily timing, arrive early morning when tour boats first dock, or later in the afternoon when day-trippers depart. The cove receives good sunlight throughout the day, with morning light particularly beautiful for photography. July and August offer guaranteed warm weather and calm seas but expect the beach to be crowded. Late spring and early autumn provide pleasant swimming temperatures with more breathing room to enjoy this spectacular setting.

Cala Mariolu is accessible by boat from several ports including Cala Gonone, Arbatax, and Santa Maria Navarrese. Regular tourist boats operate daily during summer months, with trips typically taking 30-60 minutes depending on departure point. Private boat rentals and water taxis are also available. There is a very demanding hiking trail from the Altopiano del Golgo, requiring 3-4 hours of difficult trekking over rough terrain—only recommended for experienced hikers in good physical condition. Most visitors choose the boat option, which is comfortable, reliable, and offers stunning coastal views during the journey.

Cala Mariolu is completely undeveloped with no facilities, restaurants, bars, or shops. There are no toilets, showers, or changing rooms on the beach. Visitors must bring everything they need, including food, water, sun protection, and shade (such as a beach umbrella). It's essential to pack out all rubbish to preserve the pristine environment. Some boat tour operators include meals or snacks in their packages. The nearest accommodations and restaurants are in Baunei, Cala Gonone, or Santa Maria Navarrese, which serve as base towns for visiting Gulf of Orosei beaches.

Cala Mariolu is renowned for its extraordinary water clarity and unique small white pebbles that create an almost luminous quality to the turquoise water. The distinctive rounded stones, called 'ovuli' by locals, feel smooth underfoot and give the cove its characteristic appearance. The beach is framed by dramatic limestone cliffs covered in Mediterranean vegetation, creating a stunning natural amphitheater. The exceptional visibility makes it outstanding for snorkeling, and the photogenic combination of white pebbles, turquoise water, and towering cliffs makes it one of Sardinia's most Instagrammable locations and a must-visit Gulf of Orosei destination.