Best floating Bluetooth speakers

The Soundcore Boom 3i is the pick, and the reason is one specification nobody else publishes: Auto-Upright Floating, which means it is weighted to return drivers-up rather than face-down. It is IP68, lab-tested to 240 hours of salt spray, drop-tested from 3.28 ft, puts out 50 W with BassUp 2.0 and runs 16 hours at 1.7 lb. The budget pick is the UE Wonderboom 4: it floats, it is IP67, it is rated for 5 ft drops, and it runs 14 hours in a 14.81 oz body. If you need to cover a pool deck rather than a bathtub, the Soundcore Boom 2 floats and brings 80 W peak with it.

Waterproofing and buoyancy are different claims and they get conflated constantly. An IP67 or IPX7 rating is the standard's immersion test — thirty minutes under a meter of water — and it tells you the speaker will still work after you fish it out. It says nothing at all about whether you will be able to. Plenty of IP67 speakers sink briskly.

Buoyancy is a separate, voluntary claim about sealed internal air volume against mass, and only four speakers in this site's registry publish it. That is the entire list below. What IPX7 and IP67 actually mean is the primer if the codes are what is confusing you.

Floating, and floating the right way up

Most floating speakers float badly. A cylinder or a brick with sealed air inside will float, but it will settle in whatever orientation its mass distribution prefers, and for a great many speakers that is drivers-down. A speaker playing into the water is not quiet so much as strange — the high frequencies disappear entirely and what reaches you is a muffled thump. It still works; it just stops being enjoyable.

The Boom 3i is the only one here engineered against that. Soundcore publishes Auto-Upright Floating as a feature, which is a weighting decision rather than a coating: the speaker rights itself and keeps the drivers clear of the surface. On a pool, a lake or a slow river that is the difference between a speaker you push back toward the deck and one you ignore.

Salt is a harder problem than fresh water and almost nobody tests for it. Soundcore's published figure for the Boom 3i — lab-tested to 240 hours of salt spray — is the only corrosion claim on this page. If the speaker is going anywhere near the sea, that number is worth more than an extra IP digit, and the best speakers for the beach and for a kayak or a boat are the two location pages that follow from it.

A strap matters more on water than anywhere else. Both Soundcore Boom models carry one, and on a pool or a boat it is the difference between a speaker that stays attached to something and a speaker that drifts to the far end. The Wonderboom 4 has a loop rather than a strap, which is adequate for a bathtub and marginal on open water.

The picks

Best overall — the only one that floats upright on purpose

Soundcore Boom 3i

A floating outdoor speaker that rights itself in chop, built for the water and the dirt.

What it does well

Auto-Upright Floating keeps the drivers out of the water, which no other speaker here claims. IP68 dust-tight and sealed against immersion, lab-tested to 240 hours of salt spray, drop-tested from 3.28 ft, 50 W with BassUp 2.0, 16 hours, Bluetooth 5.3 and a detachable strap, at 1.7 lb. It also carries an app EQ, a voice amplifier and a 96 dB emergency alarm.

Where it cuts corners

16 hours is the shortest runtime on this page by a clear margin, and there is no USB charge-out at all. It costs more than the Wonderboom and it is a bigger thing to pack.

Who it is for

Pools, lakes, rivers and anywhere salt is in the air — the one to buy if the speaker will genuinely be in the water.

• Battery: 16 hours
• Water rating: IP68 — submersible and dust-tight, lab-tested to 240 hours of salt spray, and it floats upright
• Output: 50 W with BassUp 2.0
• Weight: 1.7 lb (780 g)

$129.99·View on Amazon→Read the full Soundcore Boom 3i review

#ad — we earn a commission on qualifying purchases. How this is funded · Price as of November 11, 2026

Best budget pick

UE Wonderboom 4

The one to buy if the speaker is going anywhere near water.

What it does well

It floats, it is IP67, and it is rated for 5 ft drops — the most generous drop figure on this page — in a 14.81 oz body with two 40 mm active drivers and two passive radiators. 14 hours of playtime, a quoted 131 ft range, and a 360-degree round form that does not care which way it is pointing on a deck.

Where it cuts corners

It floats but it does not claim to float upright, so expect to turn it over. No salt-spray testing published, no aux input, no app EQ, no stereo pair with a second unit in the way the Soundcore models manage, and it is a personal-to-small-group speaker rather than a deck-filling one.

Who it is for

A bathtub, a hot tub, a paddleboard or a small pool, on a budget.

• Battery: 14 hours
• Water rating: IP67 — submersible to 1 m for 30 minutes, dustproof, and it floats
• Weight: 14.81 oz (420 g)

$63.29·View on Amazon→Read the full UE Wonderboom 4 review

#ad — we earn a commission on qualifying purchases. How this is funded · Price as of November 11, 2026

Best for a pool deck with people on it

Soundcore Boom 2

The value answer to a party speaker: it floats, it is loud, and it lasts a day.

What it does well

Floats, IPX7, and brings up to 80 W peak from a 50 W subwoofer and two 15 W tweeters — enough to cover a pool deck rather than a bathtub. 24 hours at 50% volume with BassUp and the light ring off, frequency response quoted at 45 Hz to 20 kHz, a carry strap, and Bluetooth 5.3.

Where it cuts corners

IPX7 has no dust rating behind it, which matters at a beach more than a pool. No upright-float claim, no salt-spray figure, no aux input at all, and the 24-hour number assumes the lights are off.

Who it is for

Pool parties and lakeside afternoons where the speaker needs to cover a group and survive going in.

• Battery: Up to 24 hours at 50% volume with BassUp and lights off
• Water rating: IPX7 — submersible to 1 m for 30 minutes, and it floats
• Output: Up to 80 W peak output (a 50 W subwoofer plus two 15 W tweeters)

$99.99$129.9923% off·View on Amazon→Read the full Soundcore Boom 2 review

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Best big floater

Soundcore Boom 2 Plus

Two woofers, two tweeters and an aux jack — the most bass hardware per dollar in a carryable box.

What it does well

The most output of anything that floats: 100 W as standard and up to 140 W in BassUp 2.0 from two 50 W woofers and two 20 W tweeters, quoted down to 40 Hz. It still floats, still carries IPX7, and unlike the rest of this page it has a 3.5 mm aux input and a 10 W USB charging output.

Where it cuts corners

8.4 lb, which is a two-hand speaker and a lot to have bobbing about. 20 hours is shorter than the Boom 2 it sits above, the light show costs more of that again, and IPX7 still carries no dust rating.

Who it is for

A big pool, a long deck or a riverbank where the speaker is placed rather than carried.

• Battery: Up to 20 hours at 50% volume with BassUp and the light effects switched off
• Water rating: IPX7 — submersible to 1 m for 30 minutes, and it floats
• Output: 100 W as standard, up to 140 W in BassUp 2.0 mode, from two 50 W woofers and two 20 W tweeters
• Weight: 8.4 lb

$169.99$249.9932% off·View on Amazon→Read the full Soundcore Boom 2 Plus review

#ad — we earn a commission on qualifying purchases. How this is funded · Price as of November 11, 2026

What each one actually publishes about water

Who should skip all of these

• Anyone whose speaker will sit beside the water, not in it. You are paying for buoyancy you will never use — the best waterproof speakers for a pool covers the full range, including non-floating options that sound better for the money.
• Anyone buying for a hot tub or a sauna. Heat, not buoyancy, is the limiting specification. The best speakers for a hot tub and for a sauna are the pages that deal with operating temperature.
• Anyone buying for a shower. A floating speaker in a shower is simply a speaker. The best shower speakers weighs the things that actually matter there.
• Anyone who needs an aux cable and buoyancy. Only the Boom 2 Plus manages both, and it weighs 8.4 lb. Speakers with an aux input is the wider list.
• Anyone who wants the loudest thing for the money. Buoyancy narrows the field sharply — the loudest for the money does not.

If you are choosing between the two Soundcore Booms, Soundcore Boom 2 vs Boom 2 Plus is the page that settles it, and the best waterproof speakers under $100 is where most of this page's budget competition sits. If the speaker is going on open water rather than a pool, read the best speakers for a kayak or boat first — buoyancy is necessary there and nowhere near sufficient.