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Dual Sea Cove Waterbed Mattress

Quick Overview

This dual waveless waterbed is the perfect bed for couples. Two bladders allow you to vary the firmness on each side of the bed. Three layers of wave reducing fiber and additional lumbar support provides 90% motion reduction. Includes FREE stand up liner and FREE waterbed conditioner.

Available in: Queen, Cal King
only $238.99 all sizes


Includes FREE liner and FREE conditioner. A $38.00 VALUE!

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This dual waveless waterbed mattress is the perfect bed for couples. Two separate waterbed bladders evenly distribute your weight, greatly reducing uncomfortable pressure points, which allows you to experience a better night's sleep without disturbing your partner. By varying the amount of water in each bladder, you can achieve different firmness levels, allowing for personalized support on each side of the bed. The Boyd Flotation Dual Sea Cove Waterbed Mattress is made of high quality long-lasting virgin vinyl with a precision design and thick reinforced 4-layer corners for extra strength. This waveless waterbed mattress contains three layers of wave reducing fiber, plus an additional three layers of lumbar fiber support to help ease back pain. You will experience the comfort and healthy benefits a waterbed has to offer with approximately 90% motion reduction. For use in a traditional hardside wood box frame.

  • Dual waveless mattress for your hard-side waterbed frame
  • Precision design with thick 4-layer reinforced corners for strength and durability
  • Generously cut virgin vinyl provides contouring support
  • 4-point memory stretch tether system
  • 3 layer wave reduction system
  • 3 layer ergonomic lumbar support foam layers
  • Approximately 90% motion reduction
  • Dual sleep system with two separate waterbed bladders
  • Durable eco-friendly 18 mil. vinyl exceeds US and European standards
  • One piece lap seam construction reduces stress
  • Generously sized vinyl completely fills out a wooden waterbed frame
  • Requires 8 oz. of waterbed conditioner to be added each year
  • 5 year full, 12 year prorated warranty
  • Available in Super Single (48" x 84" x 9"), Queen (60" x 84" x 9") and King (72" x 84" x 9") sizes

Customer Reviews

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Awesome Dual Mattress Review by Ginny
Super fast shipping!!! Well made mattress. I have had other brands and Boyd’s is by far the best. We bought a queen dual for our guest bedroom, meaning most nights we can’t sleep on our foam mattress we will sleep on this mattress. My husband and I love the dual mattress because we can adjust our side to what is most comfortable to us individually. We’ve been sleeping on a Temper-pedic and it’s far from the claims of providing the best sleep ever. So, we are back on water and plan to throw the Temper-Pedic out the door and convert our king size frame to fit a king size dual mattress from Boyd’s. Will be ordering very soon. Thank you for fast shipping and well made products. (Posted on 2/1/2021)
Happy but with an asterisk Review by Doug T
The dual mattress is really good and the separation keeps the vibration and waves from my wife and me if we get up out of bed. My concern is the 5 year limited warranty. Our other mattresses lasted for up to 15 years. The 5 year limited warranty makes me wonder about the quality. (Posted on 6/17/2019)
Great mattress Review by Sandi
My husband and I have been sleeping on waterbeds for 40 years. We love this dual mattress California Kind as we have different heat adjustments and firmness adjustments. Although we love our waterbed, as we get older it has become more difficult to burp and, for me, even lifting the corners when changing the bed and putting on the mattress pad, etc. Not a criticism of the mattress by any means, just we hate getting old and we hate the idea of having to switch to a standard mattress in the next few years! (Posted on 10/31/2018)
I do suggest people give this a try. Review by B
It comes in two separate badders. You have to alternate filling each side to keep the balance. I suggest split off and fill with two hoses at one time. If you toss and turn you will find yourself being wedged down in the middle. We had to purchase a 2in memory foam pad to help with this problem . There is little to no instructions or helpful hints in how to do this right. Quality workmanship in the product, it's just getting used to it is the major set back. (Posted on 5/22/2018)
Excellent Product Review by Gail
Quality product at a fair price! Ordered extra mattress by mistake...was allowed to ship back...full refund minus shipping costs. 5 stars! (Posted on 4/26/2018)
Great Mattress for a Couple Review by Mike
My wife and I have slept on a waterbed for nearly 30 years. While we both enjoy the comfort of the waterbed, the support and temperature have always been a compromise. As we gotten older, our personal choices have grown further apart, especially with regards to the temperature.
This dual mattress means no more compromising and we are both sleeping better. She has the cooler and softer mattress and I have a firmer and warmer one.
I would recommend instructions should be included regarding the divider and how it should be installed. (Posted on 4/13/2018)
Excellent Product Review by Gail
We have been using a waterbed for 40 years. Love the dual mattress since my husband likes his side hot and mine just body temp. Don't plan on changing unless we get so old we can't get out of it! :) (Posted on 12/29/2017)
So comfortable ! Review by Barb
I had slept on waterbeds for years, but had went to a regular bed. This is by far the best bed l have ever slept on. The construction of this mattress is more than wonderful. I had forgotten how wonderful your body could feel, I had never had one with this kind of support in it. I would recommend this to anyone that loves a wonderful nights sleep. You don't have pressure points with this bed, and it conforms to your body, and doesn't have any movement, like the old waterbed that we had before. The duel cores are the very best, for couples, my side doesn't move at all when my husband gets up from the bed. It is the best money that you will ever spend on a mattress. (Posted on 4/14/2017)
Hate the divider Review by 160 lb man
I bought this about 2 or 3 years ago and have never been satisfied. My wife likes the lumbar support, but I often wake up with a dull ache in my back (I have never had back problems on any other bed). If you're not laying directly in the middle of your side, it makes you feel like you're sleeping on an angle, as it 'balloons up' opposite where you're laying. Also, if you like to 'meet in the middle', it is terrible, as you fall into the divider between the bladders. I hate to spend $$ for another bed so soon after buying this, but I'm just really disappointed in this mattress. To finish on a positive note, the ability to have two different temperatures / firmness is somewhat of an advantage and it is well made. I would buy another Boyd product, just not this one. (Posted on 5/11/2016)
Great for two people Review by Mindy F
I have always preferred a softer mattress compared to my husband and was excited to find this option. I can now set my side to be a little squishier while my husband can firm his side up. Only downside was that it took a week to get to us for some reason. (Posted on 3/23/2016)

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