Adventure brief
Tour All Around the Island
Set sail with Poseidon Excursions for a full-day boat trip around Symi, Greece, swimming crystal-clear bays, visiting historic sites, and savoring a BBQ lunch on a secluded island.
Symi, part of Greece's Dodecanese archipelago near Rhodes, offers some of the Aegean's clearest waters and most compelling coastal scenery. Poseidon Excursions, a local outfitter with three decades of experience, invites adventurers on a full-day, 7-hour voyage around this stunning island aboard their traditional boat, the Poseidon. This trip uniquely blends open-water swimming, cultural insight, and scenic cruising for a comprehensive sense of what Symi’s coastline has to offer.
Departing from Symi’s port of Yialos mid-morning, the journey immediately reveals untouched coves and bays accessible only by sea. Early stops include Maroni Bay, a favored spot for swimming in remarkably transparent water, and the tiny islet of Agios Emilianos, where guests step ashore to visit a small monastery funded by local sponge divers. This glimpse of Symi’s spiritual and maritime heritage underscores the island’s close relationship with the sea.
Further along, the exploration deepens at the Seal Cave, a rare natural hollow where swimmers may encounter the elusive resident seal, affectionately named Mr Alex. The next swim stop is one of two spectacular options: either the Diavates Islands—small, rocky islets with inviting water—or Agios Vasilios Bay, known for its pale sand and aquamarine clarity, perfect for beachcombing. The centerpiece of the day is a leisurely 2.5-hour lunch break on Seskli Island.
Here, freshly grilled chicken and local fare are enjoyed beneath maritime pines, paired with wine as guests relax on a small sandy beach or explore the island’s natural charm. The return leg includes a visit to Agios Georgios Bay, whose vivid waters frame a cliffside Greek flag—an iconic photo opportunity. Poseidon Excursions stands out for its authentic approach: a traditional vessel operated by experienced locals offering more than a boat ride—it’s a journey into Symi’s environment, history, and coastal beauty.
For travelers seeking a unique blend of swimming, culture, and unhurried island ambiance, this boat tour is an essential part of any Dodecanese itinerary.
Adventure tips
Plan your experience.
Curated tips for an optimal adventure.
- 01Bring Reef-Safe Sunscreenessential
Protect your skin and the sensitive marine ecosystem by using reef-friendly sunscreen during swims.
- 02Pack Swim Gear and Water Shoesinfo
Wear water shoes for rocky shore access and bring goggles or snorkels to enhance your swim experience.
- 03Arrive Early and On Timewarning
The boat departs promptly at 10:30 am from the port of Yialos; arriving early ensures a smooth boarding process.
- 04Carry a Light Towel and Change of Clothesinfo
Bring quick-dry clothes for comfort after swimming stops and the BBQ lunch break on Seskli Island.
Recommended gear
What to bring.
Swimwear
Necessary for swimming stops in the crystal-clear bays.
summerEssentialSunscreen
Protects skin from prolonged sun exposure during the open-deck boat trip.
summerEssentialWater Shoes
Provides traction and protection when stepping onto rocky shores and slippery piers.
summerLight Jacket or Cover-up
Useful for cooler breezes on the open boat or shade in shaded lunch areas.
spring|fallLocal insights
Context for the journey.
Nearby secrets
The secluded Diavates Islands for quiet swimming away from crowds, Agios Emilianos monastery, a spiritual site rarely visited by casual tourists
Local fauna
The shy resident seal known as Mr Alex inhabits the Seal Cave, Various seabirds that nest along the rocky coastlines around Symi
Historic heritage
The monastery of Agios Emilianos was built following a vision experienced by a local sponge diver’s skipper, underscoring Symi’s deep connection to maritime traditions.
Mindful exploration
Poseidon Excursions emphasizes respectful interaction with the marine environment and supports local efforts to maintain Symi’s pristine waters and coastal habitats.
Photography tips
Capture the moments
- Viewpoints
- Agios Emilianos monastery jetty, Seal Cave entrance from the boat, Cliffside near Agios Georgios Bay
- Subjects
- Turquoise waters and rocky coastline, Traditional boat Poseidon under sail, Local wildlife such as the resident seal
- Best times
- Morning departure light, Golden hour during late afternoon return, Midday at Seskli Island for vibrant water colors
Frequently asked questions
Before you go.
Is this tour suitable for children?
Yes, the tour is family-friendly and suitable for all ages, but children should be comfortable in and around water.
Can non-swimmers take part?
Non-swimmers can enjoy the cruise but should stay on board during swimming stops for safety reasons.
What kind of food is included?
A BBQ lunch with freshly prepared chicken and local dishes is served on Seskli Island, along with fruits, drinks, snacks, and coffee.
Is snorkeling equipment provided?
Snorkeling gear is not provided, so bringing your own equipment is recommended if you wish to snorkel.
What time does the tour start and end?
The tour departs at 10:30 am from Yialos port and returns approximately 7 hours later in the late afternoon.
Are there restroom facilities on board?
Yes, the Poseidon boat is equipped with restroom facilities for guest comfort during the trip.