Sifnos is a fantastic base for exploring some of Greece’s most beautiful waters and nearby islands. Its location in the Cyclades means you can easily take boat tours that reveal secret beaches, volcanic landscapes, and uninhabited islands. We particularly like boat trips that let you experience the raw beauty of the Aegean, like swimming in crystal-clear waters or wandering through rugged rock formations. One standout example is a private Milos cruise that takes you to the famous Kleftiko caves—an Instagram-worthy highlight that’s worth the splurge. Plus, if you’re into a quick, active adventure, the speedboat trips from Sifnos to Kimolos and Milos are perfect for a day of snorkeling and sightseeing. And for something truly exclusive, the private Poliegos Island cruise offers a half-day of absolute serenity and unique landscapes.
If you’re considering which tour to book, knowing the differences can help. Whether you’re after a private experience, a quick half-day trip, or an all-out adventure, there’s something for every traveler. Read on for our top picks, including detailed reviews and practical tips.
1. Milos: South Coast Private RIB Cruise with Kleftiko Visit
This private RIB cruise along Milos’ south coast offers an intimate look at some of Greece’s most breathtaking seascapes. For around $1,654 per group (up to 4 people), you’ll enjoy a 6-hour trip that’s perfect for those who want a flexible, personalized day on the water. The tour includes stops at Kleftiko, known as one of Greece’s most iconic spots for its towering sea caves and jagged cliffs, which look especially dramatic at sunset or sunrise. Your boat will also visit remote beaches accessible only by sea—think secluded, pristine sands perfect for a quiet swim—plus an old mine that tells a quieter story of the island’s past.
What makes this tour stand out is its customizable nature and peaceful ambiance, even when the wind is howling. The boat’s speed and size allow you to access hidden nooks of Milos unavailable to larger tour boats. The reviews, with a solid 4.3/5 rating, praise the professionalism of the crew and the stunning scenery. Guests often comment on the “calm waters and incredible sights,” making it ideal for travelers who want a luxury, private experience on the sea.
Bottom Line: This tour is perfect if you want a personalized, relaxed, and scenic day with plenty of swimming opportunities and unforgettable landscapes.
$1,654 per group up to 4
2. From Sifnos: Kimolos and North Milos Speedboat Tour
For around $1,378 per group (up to 4), this speedboat tour takes you from Sifnos to explore northern Kimolos and Milos in about 6 hours. It’s a lively option for those who want to see multiple islands quickly but still enjoy multiple stops for swimming and snorkeling. The tour includes visits to the natural swimming pool and the striking basalt rock formations of the Kalogiroi Islets, which are perfect for exploring underwater. You’ll also sail past Geronikola beach with its dramatic black pebbles, and, of course, get a chance to relax at Sarakiniko Beach, famed for its moon-like cliffs.
The highlight is the chance to gaze at the volcanic sea bottom while snorkeling, with clear waters making it easy to spot marine life. The boat’s speed allows you to cover a lot of ground—if you’re a fan of active, scenic excursions, this is your best bet. The 4.3-star reviews reflect guests’ satisfaction with the fast pace and variety of sights, though some might find it a bit rushed if they prefer a more leisurely pace.
Bottom Line: This tour is ideal if you want a dynamic, all-around day of swimming, snorkeling, and island-hopping, with plenty of photo opportunities along the way.
$1,378 per group up to 4
3. From Sifnos: Private Speedboat Trip to Poliegos Island
At just $1,101 per group (up to 4), this private half-day trip to the uninhabited Poliegos Island offers an exclusive experience for lovers of solitude and natural beauty. The tour lasts about 4 hours and includes a cruise across the Aegean to a remote, largely untouched island. Once there, you’ll swim in crystal-clear waters, explore caves and rock formations, and marvel at the raw landscape that is unlike the more touristed spots.
What makes this trip special is its privacy and focus on the untouched environment. The reviews, with a perfect 5/5 rating, emphasize the personalized attention and stunning scenery. Guides share insights into the island’s geology and secluded coves, making it perfect for travelers who enjoy a quieter pace and authentic natural exploration. The main challenge is its shorter duration, so it’s best for those who want a focused, scenic adventure rather than a full-day outing.
Bottom Line: This tour is perfect for a romantic escape or a peaceful escape to unspoiled nature with the flexibility of a private trip.
$1,101 per group up to 4
How to Choose
When selecting your boat tour in Sifnos, think about your budget, time, and interests. If you want a luxury, private experience, the Milos South Coast RIB cruise offers unmatched exclusivity and rich scenery. For a quick, active day exploring multiple islands with snorkeling, the Kimolos and North Milos speedboat tour fits well. If your priority is serenity and untouched landscapes, the private Poliegos trip provides a unique, peaceful escape.
Keep in mind that bookings tend to fill early, especially in peak season (June to September). Also, consider the weather—rough seas can affect tours, so flexibility in your plans helps. Each experience offers something different: whether it’s totalling relaxation, island-hopping adventure, or private discovery, you’ll find a boat tour that suits your style.
Final Thoughts
Sifnos’s location makes it an ideal jumping-off point for sea-based adventures. The options range from private, leisurely cruises to fast-paced explorations of nearby islands and uninhabited oases. The Milos South Coast Private RIB Cruise stands out for its combination of comfort and scenery; the Kimolos and North Milos Speedboat Tour offers a lively day of snorkeling and sightseeing; while the Poliegos private trip promises quiet, untouched beauty for those seeking solitude.
For most travelers, booking early is wise—these tours tend to fill quickly in summer months. Whether you’re after a luxury private cruise, a quick island hop, or a wildly scenic escape to Poliegos, there’s a perfect boat trip waiting in Sifnos. Now’s the time to plan your sea adventure and make the most of your Greek island holiday.