LEGO Underwater Adventure (21598)

Minecraft · 310 pieces · 3 minifigures

From $37.86 at Walmart · 12% off

Not retiring yet (on sale since 2026)

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Compare prices (Canada)

Regular price $42.99

See it at Walmart, $37.86

Buy now: That’s the lowest price we’ve recorded here since October 8, 2026.

. Amazon offers can be third-party (marked).

Similar sets with bigger discounts

Price history

Lowest price today: $37.86; at Walmart
Lowest we’ve recorded: $37.86; Walmart, Oct 15, 2026
LEGO’s regular price: $42.99; today’s lowest is 12% off
Tracked since: Oct 8, 2026; 1 price change since

Price records (3)

October 15, 2026 · Walmart$37.86
October 10, 2026 · Walmart$42.86
October 8, 2026 · LEGO.com Canada$42.99

Prices at LEGO.com Canada, Amazon.ca, Walmart, Best Buy, Canadian Tire, Indigo, Mastermind Toys, The Discovery Hut, Costco, Toymasters, Minds Alive, Kaboodles, Brault & Bouthillier, Little Canadian, Galerie du jouet and Raoul Chagnon, checked daily. A line breaks when a store was out of stock or not selling the set.

LEGO Underwater Adventure in other countries

The lowest price today in each country where LEGO sells it, converted at the European Central Bank’s rate. Delivery across borders isn’t included: most stores only ship inside their own country.

CountryLowest priceIn CADStore

FranceBest priceE.Leclerc€21.90$34.44E.Leclerc
Canada(this page)Walmart$37.86$37.86Walmart
USLEGO.comUS$29.99$42.09LEGO.com

Show all 13 countries

Exchange rates of October 22, 2026.

Set details

Pieces: 310
Minifigures: 3
Ages: 8+
Released: 2026
Set number: 21598
Theme: Minecraft
Price per piece: 12.2¢at today’s lowest price
LEGO.com rating: 4.8
LEGO Insiders points: 215

LEGO Underwater Adventure building instructions

Instructions bookletPDF, 25 MB

Official instructions from LEGO.com, free to download. The LEGO Builder app has them too, many with 3D steps. All instructions on LEGO.com

LEGO Underwater Adventure parts list

299 pieces in 119 different parts and colors, plus 3 minifigures.

Minifigures

Deep Sea Diver
Steve, Nougat Face, Lavender Helmet and Armor
Zombie, Sand Green Head (Drowned)

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Parts list: Rebrickable.

About the LEGO Underwater Adventure

Dive into gaming action with this Underwater Adventure (21598), a LEGO® Minecraft® building set gift for boys, girls and kids ages 8 years old and up. Players join Steve, the Deep Sea Diver, a drowned, dolphin, tropical fish, guardian and elder guardian as they explore and battle among coral, an ocean monument and an ocean ruin with buried treasure. Fans of the popular video game can recreate Minecraft ocean adventures, helping Steve use his map and boat to embark on an exciting journey. On the way, they battle hostile guardians who try to obstruct Steve’s plans by launching missiles. There’s endless imaginative play inspired by the toy’s accessories, such as Steve’s sword, axe and spyglass, the drowned’s trident and buried treasure chest containing gold and an emerald. Treat kids to this birthday, holiday or any day Minecraft gift idea. And with the LEGO Builder app, kids can zoom, rotate in 3D and track progress with easy-to-follow digital instructions. Set contains 310 pieces.

UNDERWATER TOY BUILDING SET – Make a splash with this ocean-themed LEGO® Minecraft® Underwater Adventure (21598) playset for fans of the popular video game
7 LEGO® MINECRAFT® FIGURES – Dive in and discover coral, an ocean monument and a ruin with buried treasure with Steve, the Deep Sea Diver, a drowned, dolphin, fish, guardian and an elder guardian
PRETEND PLAY TOY – Steve explores the ocean using a map and a boat as a friendly dolphin guides him on his adventure, until missile-launching guardians start an underwater battle
AUTHENTIC ACCESSORIES – Bring the adventure to life with realistic details like Steve’s sword, axe and spyglass, the drowned’s trident and a treasure chest containing gold and emeralds
GIFT FOR GAMERS – This birthday, holiday or any-day gift for boys and girls ages 8 and up makes a great treat for fans of gaming and Minecraft® merch
EXPAND THE FUN – Check out the full range of building sets (sold separately) and take hands-on gaming to the next level
MINECRAFT® MADE REAL – Players can create and customize scenes from the popular game, rearranging, recreating and reimagining as new adventures take shape
DIMENSIONS – This 310-piece building set measures over 2.5 in. (7 cm) high, 8 in. (20 cm) wide and 3.5 in. (9 cm) deep

Description: LEGO.com.

LEGO Underwater Adventure: FAQ

Is the LEGO Underwater Adventure retiring?

Not yet: the LEGO Underwater Adventure isn’t flagged as retiring. LEGO.com Canada doesn’t list it as “Retiring soon”. We check every day and will update this page the day that changes.

How much is the LEGO Underwater Adventure?

The lowest price we found today is $37.86 at Walmart, out of 2 stores selling it today (regular price $42.99). Prices change often: this page is updated every day.

Should I buy the LEGO Underwater Adventure now or wait?

12% off at Walmart. The best price today is $37.86 at Walmart, 12% below LEGO’s regular price. That’s the lowest price we’ve recorded here since October 8, 2026.