Review · KONSTANZ TOURS
Lake Constance (Untersee!!): Private & guided Boat Tour
The best part of this private Untersee boat tour is the freedom to shape the two hours around your mood. You can cruise past peaceful shorelines, stop for a swim, stretch out in the bow, or simply let the skipper handle the boat while you enjoy the water. The Untersee feels calmer and less busy than Lake Constance’s larger eastern reaches.
I like the polished Sea Ray SPXE190, especially its roomy bow lounge and broad swim platform. I also like the personal service: Nicole has shown real flexibility with timing when weather changed, and the skipper can tailor the outing to your group. The main drawback is the two-hour limit, which passes quickly, and there is no toilet on board.
Key points at a glance
- A private Sea Ray SPXE190: The modern bowrider carries up to five people and uses a powerful 200 PS Mercruiser inboard motor.
- A flexible two-hour plan: Spend the time cruising, sightseeing, sunbathing, swimming, or combining all four.
- The quieter Untersee: This western section of Lake Constance offers a calmer setting than the larger eastern part.
- A skipper takes care of the boat: Fuel, bottled water, and the skipper are included, so you can focus on the outing.
- Gaienhofen-Horn pickup: Pickup is included there, while another German or Swiss harbor in the Untersee area costs extra.
- Bring swimwear, not shoes: Shoes and pets are not allowed, and there is no toilet on board.
Why the Untersee makes a fine two-hour escape

Lake Constance is large enough to feel like several different lakes. The Untersee, near Gaienhofen and the Swiss border, has a quieter character than the bigger eastern section. That matters on a short private cruise. You are not trying to cover a huge stretch of water. You can slow down and enjoy the small coves, wooded shorelines, and open views without turning the trip into a race.
From the boat, the setting works best as a moving break from land sightseeing. You might spend part of the ride looking toward the shore, then turn your attention to the water and the clean, simple pleasure of a swim. The tour is not built around a long list of landmarks or formal commentary. It is about time on the lake, with a skipper who can respond to what you want that day.
I see this as a particularly good choice after a busy run of museums, old towns, and scheduled stops. Two hours gives you enough time to feel away from the road without taking up a whole day. It also makes the tour easy to fit into a stay around Gaienhofen or the nearby Untersee harbors.
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The Sea Ray SPXE190 and what its size means

The boat is a Sea Ray SPXE190, a modern bowrider with room for a maximum of five people. That limit is important. This is not a large sightseeing boat where you can bring a whole family reunion. It is a small private outing, best suited to a couple, a family, or a close group of friends.
The bow has a generous lounge area for sitting or sunbathing. If you want to lie back and watch the shoreline slide past, this is the place to do it. The stern has a large swim platform, which makes getting into and out of the water easier than it would be from a basic runabout.
A 200 PS Mercruiser inboard motor gives the boat plenty of power for cruising. You do not need to operate it or worry about fuel, navigation, or handling. The skipper takes care of those jobs. That leaves you free to talk, take in the scenery, or keep an eye on the weather and water conditions.
The boat is stylish and well maintained, but keep the format in mind. A bowrider is an open boat, not a covered cabin cruiser. You are exposed to sun, wind, and spray. Bring what you need for a comfortable time on the water, but leave your shoes behind because they are not allowed on board.
How the two hours can unfold

The exact plan is flexible, which is one of the tour’s strongest features. The basic outing begins with pickup at the end of the landing stage in Gaienhofen-Horn, unless you have arranged another harbor in the Untersee area. After settling in, you can discuss what you want from the time on the water.
One option is a straightforward sightseeing cruise. The skipper can guide you through the quieter parts of the Untersee, giving you a different view of the shoreline than you get from a road or lakeside path. This is a good choice if you want fresh air and scenery but do not plan to swim.
Another option is a slower outing built around sunbathing. The bow lounge gives you a comfortable place to stretch out, and the boat can take you to quieter coves suited to a break. There is no need to keep moving every minute. A private boat lets you enjoy stillness, which is hard to find on a tightly scheduled group cruise.
Swimming is also central to the experience. The swim platform at the back makes water access simple, and the tour is designed to include a refreshing bath if conditions suit. I would bring a towel and swimwear, though the supplied details only specifically include bottled water. You should also remember that there is no toilet on board. The skipper can make an optional stop at a harbor if needed.
You can combine these elements, but two hours is not a long time. If swimming is your priority, say so early. If you want more sightseeing, make that clear before departure. The private format gives you flexibility, but it cannot turn two hours into a full afternoon.
A skipper-led outing with room for personal choices

The skipper is there to provide safe, attentive service and handle the boat. That changes the feel of the trip. You are not renting a boat and then trying to learn the controls, find a suitable cove, or keep track of fuel. You can relax from the start.
Nicole is named as the host and has shown useful flexibility with changing plans. One party of four was able to shift its departure time on the day to find better weather, then chose to swim and shape the outing around the group’s wishes. That kind of response is especially helpful on a lake, where wind and cloud can affect the mood of a boat trip quickly.
Do not expect a formal lecture with a fixed script. The available languages are German, English, and French, and the tour is better understood as a guided private cruise than a history lesson. You can ask for sightseeing, but the main value is having a local skipper adjust the pace and route to your interests.
The skipper also helps keep the outing comfortable for a small group. You can talk normally, change your mind, and decide that a swim sounds better than another stretch of cruising. That personal control is hard to get on a larger public boat.
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Swimming, sun, and the practical limits

The Untersee is a strong setting for a warm-weather boat ride, but this is still an outdoor activity. You are exposed to the elements, and the tour is not suitable for people prone to seasickness. If motion on small boats bothers you, a larger vessel or land-based lakeside plan may be a better fit.
The boat has no WC. This is the most important practical limitation beyond the short duration. Use the facilities before boarding, and tell the skipper if you need a harbor stop. An optional stop can be arranged, but it uses part of your two-hour outing.
Food is not included, and alcoholic drinks are available only by advance order. Bottled water is included. For a two-hour trip, this is usually enough for a simple outing, but you should arrange anything extra ahead of time rather than assume it will be ready at the harbor.
Pets are not allowed, and children under two are not considered suitable for this activity. The no-shoes rule is also firm. Wear something easy to remove at the dock, and plan to go barefoot on board.
Pickup at Gaienhofen-Horn and other Untersee harbors

Pickup from Gaienhofen-Horn is included. The meeting point is at the end of the landing stage, so you should contact the provider in advance to make sure you find one another. The supplied contact number is 0049 1514 4933300.
Pickup from another German or Swiss harbor in the Untersee region is possible for an added charge. The area restriction matters: this is not a transfer service across the entire Lake Constance. If you are staying elsewhere around the lake, confirm that your harbor is within the Untersee area before you book.
The included pickup makes Gaienhofen-Horn the simplest choice. It avoids an extra fee and keeps the meeting plan clear. If another harbor would save you a long drive, compare the surcharge with your transport time. The flexibility may be worth it, especially for a private group already staying near the Swiss or German shore.
Is $363 good value for up to five?

The listed price is $363 per group of up to five people, rather than a per-person fare. That works out to about $72.60 each when five people fill the boat. For two people, the effective cost is much higher, so this tour makes better financial sense for a full or nearly full group.
The price includes the boat for two hours, the skipper, fuel, bottled water, and pickup from Gaienhofen-Horn. Those inclusions matter because you are not adding fuel or a boat-rental fee at the end. You are paying for a private boat, not just a seat on a scheduled cruise.
I consider the value strongest for a group of four or five that wants privacy and swimming time. You can choose the pace, avoid a crowded deck, and change the plan during the ride. A public cruise may cost less per person, but it will not give you the same control over stops or timing.
For two people, the price is a splurge. It can still make sense for a special afternoon, but you should be honest about what you are buying. This is not a long sightseeing voyage or an all-day charter. It is a polished, personal two-hour break on the water.
Who should book this private Untersee cruise?

I would recommend it most strongly to couples, families with older children, and small groups of friends who want a relaxed lake outing. It suits people who value privacy, swimming, and flexible timing more than a packed program of sights.
It is also a good choice for anyone celebrating a special occasion. The elegant, well-kept boat gives the outing a more polished feel than a basic rental, while the small capacity keeps it personal. You can spend the time talking and enjoying the setting instead of following a group schedule.
I would be more cautious if you need a toilet on board, dislike small boats, or want a long list of historical facts. The tour is also a poor match for parties larger than five because the boat has a strict maximum capacity. Children under two are not suitable, and pets cannot come along.
For the best experience, book with a clear idea of your priority. Tell Nicole or the skipper if you want swimming, sightseeing, sunbathing, or a balanced mix. Watch the forecast, stay flexible with timing when possible, and remember that two hours goes fast once you stop for a swim.
Should you book it?

Book this tour if you want a private, stylish boat ride on the quieter Untersee and can share the cost with several people. The strongest reasons are the flexible plan, the attentive skipper, the swim platform, and the chance to enjoy the lake without handling the boat yourself.
Think twice if you want the lowest-cost way to see Lake Constance, need onboard facilities, or prefer a longer cruise. For a group of four or five, though, the price is fair for a fuel-included private charter with pickup at Gaienhofen-Horn. On a good-weather day, it offers a simple pleasure: two hours of open water, a quiet cove, and nowhere else you need to be.
FAQ

How long is the private Lake Constance boat tour?
The boat tour lasts two hours. You can use that time for cruising, sightseeing, sunbathing, swimming, or a combination of these activities.
How many people can join the boat tour?
The private Sea Ray SPXE190 can carry up to five people.
What kind of boat is used?
The tour uses a Sea Ray SPXE190 bowrider with a 200 PS Mercruiser inboard motor, a lounge area in the bow, and a large swim platform at the stern.
Is a skipper included?
Yes. A skipper is included and handles the boat during the cruise. German, English, and French are available.
Where is pickup included?
Pickup is included from the harbor in Gaienhofen-Horn, at the end of the landing stage. Pickup from another German or Swiss harbor in the Untersee area is available for an added charge.
Is swimming included?
Yes. Swimming is one of the activities you can choose during the two-hour private boat ride. The boat has a stern platform for water access.
Is there a toilet on the boat?
No. There is no WC on board. An optional stop at a harbor can be arranged if needed.
Are food, drinks, and fuel included?
Fuel and bottled water are included. Food is not included. Alcoholic drinks can be arranged in advance for an additional charge.
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