Best Waterproof Lock Boxes: Top Picks for Secure Storage

Looking for the best waterproof lock boxes to keep your valuables safe? We’ve tested and reviewed the top 10 options to help you find the perfect one for your needs.

Keeping your valuables safe is a top priority, especially when you’re outdoors or on the go. Waterproof lock boxes are the perfect solution for protecting your keys, documents, and small items from the elements. Whether you’re a homeowner, traveler, or outdoor enthusiast, these boxes offer peace of mind.

We’ve tested and reviewed the best waterproof lock boxes available. From durable materials to easy-to-use designs, these products stand out for their reliability and security. You’ll find options for every need, whether it’s storing house keys or safeguarding important documents.

Imagine never worrying about lost keys or damaged items again. With the right waterproof lock box, you can focus on your adventures while your belongings stay safe and dry. Let’s explore the top picks to find the perfect one for you.

List of Top 10 Waterproof Lock Boxes

Title	Best For	Price
Master Lock Key Lock Box for House Keys – Outdoor Portable Combination Lockbox with Resettable 4 Digit Code, Weather Resistant Durable Metal Body, Holds 5 Keys, 5400D Black	This Master Lock Key Lock Box is perfect for anyone who needs to share keys safely. It’s great for homeowners, renters, and businesses who want easy, secure access for guests, workers, or family.	View on Amazon (paid link)
Sheffield 12680 Marine Storage Box, Dry Box Made in USA, Water Resistant Container for Boat and Dock Gear, Small Parts Organizer with Latch, Stackable	This marine storage box is perfect for boat owners, anglers, and outdoor enthusiasts. It keeps gear dry and organized in harsh conditions, making it ideal for fishing, camping, or hobby storage.	View on Amazon (paid link)
Outdoor Products – Watertight Box	This watertight box is perfect for outdoor lovers. It keeps your gear safe from water, dust, and dirt, making it ideal for boating, kayaking, or fishing.	View on Amazon (paid link)
XXL Large Key Lock Box, 5.5″x4.1″x2.1″, Upgraped Material	This XXL Large Key Lock Box is perfect for anyone who needs a secure and durable way to store keys or small items. Whether you’re a homeowner, realtor, or business owner, this lock box offers easy installation, a large capacity, and a secure 4-digit password system. It’s ideal for emergency access or sharing keys safely.	View on Amazon (paid link)
YIYITOOLS Fireproof Lock Box with Key and Combination Lock, Fire Safe Document Box, Portable Fireproof Waterproof Safe for Home,Office,Travel, Secure Storage for Documents,Jewelry,Passport,Cash	This fireproof lock box is perfect for anyone who wants simple, strong, safe storage at home, at work, or on the go. It’s great for people who need to keep cash, papers, and small valuables safe from heat, water, and damage.	View on Amazon (paid link)
Key Lock Box for Outside – Sturdy and Durable Lock Box for House Key,5 Key Capacity Lockbox for Keys Outdoor,Waterproof Emergency Spare Key Lockbox with Resettable Code for Home,Garage,Airbnb	This key lock box is perfect for anyone who needs safe, easy access to their home, garage, or Airbnb. It’s ideal for busy people, families, or hosts who want to share keys securely.	View on Amazon (paid link)
BRILLIRARE Key Lock Box, Waterproof 4 Digits Combination Lockbox with Removable Shackle, Wall Mount Resettable Key Hider, Upgraded Large Password Boxes for Car House Office Apartment Keys-Grey	This key lock box is perfect for anyone who needs a secure, easy-to-use way to store keys, IDs, or small items. It’s great for homeowners, renters, or businesses looking for reliable key access without hiding spares.	View on Amazon (paid link)
SentrySafe Black Fireproof and Waterproof Safe, File Folder and Document Box with Key Lock, Ex. 14.3 x 15.5 x 13.5 inches, HD4100	This SentrySafe is perfect for anyone who wants to keep important papers and valuables safe. It’s great for families or small businesses needing fireproof and waterproof protection.	View on Amazon (paid link)
Rudy Run Key Lock Box for Outside – Small Outdoor Lockbox for Keys with Code, 4-Digit Combination Hidden Safe to Hide a Key Outside, Portable Safe Key Storage, 5.78 in, 1 Pack	This key lock box is perfect for anyone who needs secure, easy access to spare keys. It’s ideal for homeowners, Airbnb hosts, real estate agents, and property managers.	View on Amazon (paid link)
Plano 3440-10 Waterproof Stowaway (3400 Series)	The Plano 3440-10 Waterproof Stowaway is perfect for anglers and outdoor lovers. It keeps phones and small valuables safe from water and damage.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 waterproof lock boxes in this expert-reviewed guide. Each product is chosen for its durability, security, and value, ensuring you find the perfect fit for your needs. Whether for home, travel, or outdoor use, these lock boxes keep your items safe and dry in any condition.

1. Master Lock Key Lock Box for House Keys – Outdoor Portable Combination Lockbox with Resettable 4 Digit Code, Weather Resistant Durable Metal Body, Holds 5 Keys, 5400D Black

Master Lock Key Lock Box for House Keys – Outdoor Portable Combination Lockbox with Resettable 4 Digit Code, Weather Resistant Durable Metal Body, Holds 5 Keys, 5400D Black

The Master Lock Key Lock Box keeps house keys safe and easy to access. It holds up to 5 keys in one spot. Perfect for family, renters, or helpers.

Its weatherproof design protects keys from rain, dust, and wear. The metal body and shutter door last year-round. A reliable way to hide keys outside.

Set a 4-digit code and reset it anytime. The vinyl-coated shackle installs quickly and scratch-free. Great for realtors, rentals, and homeowners.

Pros	Cons
Holds 5 keys securely in one weatherproof spot. Resettable 4-digit code for flexible access anytime. Durable metal body resists rain, dust, and wear. Hangs easily without scratching surfaces, portable design. Perfect for homeowners, renters, and property managers.	Small space may not fit big keys Manual code can be slow to enter Hanging design can shift on some knobs

Perfect For:

This Master Lock Key Lock Box is perfect for anyone who needs to share keys safely. It’s great for homeowners, renters, and businesses who want easy, secure access for guests, workers, or family.

Ready to Purchase?

View Price on Amazon (paid link)

2. Sheffield 12680 Marine Storage Box, Dry Box Made in USA, Water Resistant Container for Boat and Dock Gear, Small Parts Organizer with Latch, Stackable

Sheffield 12680 Marine Storage Box, Dry Box Made in USA, Water Resistant Container for Boat and Dock Gear, Small Parts Organizer with Latch, Stackable

The Sheffield 12680 Marine Storage Box is made in the USA. It keeps your boat and dock gear safe and dry. This water-resistant container is perfect for marine use.

It has a tight-fitting lid with a rubber seal. This keeps moisture and dust out. The top tray holds small items like keys and tackle. It stays organized even in rough waters.

The stackable design saves space on your boat or in your garage. It has three locking options for extra security. Use it for fishing, camping, or storing ammo. It’s versatile and durable.

Pros	Cons
Water-resistant design protects gear in harsh marine environments. Stackable and secure for easy, stable storage on boats or docks. Organizes small parts with a lockable top tray for quick access. Versatile for boats, camping, or hobbies—one box, many uses.	No built-in lock for extra security. Small size may not fit larger gear. Plastic material could crack under heavy pressure.

Perfect For:

This marine storage box is perfect for boat owners, anglers, and outdoor enthusiasts. It keeps gear dry and organized in harsh conditions, making it ideal for fishing, camping, or hobby storage.

Ready to Purchase?

View Price on Amazon (paid link)

3. Outdoor Products – Watertight Box

The Outdoor Products Watertight Box is a durable, multipurpose storage solution. It’s made from shatterproof polycarbonate, keeping your items safe from moisture, dust, dirt, and sand.

Perfect for boating, kayaking, fishing, and more. Features a rubber key clip, strap attachment point, and O-ring closure for a watertight seal.

Small size measures 3.25 x 5.25 x 6.75 inches with 840 ml capacity. Not for climbing, load-bearing, or full submersion. Backed by a 1-year limited warranty.

Pros	Cons
Watertight seal keeps your gear safe from moisture, dust, and sand. Shatterproof polycarbonate ensures durable protection for outdoor adventures. Compact size with 840 ml capacity fits easily in your bag. Rubber key clip and strap point add convenient functionality.	Not for climbing or heavy loads, limiting outdoor use. Avoid full submersion—not fully waterproof. Small size may not fit larger gear.

Perfect For:

This watertight box is perfect for outdoor lovers. It keeps your gear safe from water, dust, and dirt, making it ideal for boating, kayaking, or fishing.

Ready to Purchase?

View Price on Amazon (paid link)

4. XXL Large Key Lock Box, 5.5″x4.1″x2.1″, Upgraped Material

The XXL Large Key Lock Box is durable and secure. Made from thickened hard zinc alloy, it resists wind, rain, and tampering. Its 5.5″x4.1″x2.1″ size holds 20-30 keys or small items.

It offers three installation methods: hang it, mount it, or hide it. The 4-digit password ensures 10,000 unique combinations for added security.

Use it for homes, offices, or travel. Perfect for realtors, cleaners, or pet caretakers. Set your own password easily and keep your keys safe.

Pros	Cons
Durable and thick material resists hammering and prying. Large capacity holds 20-30 keys or small items securely. Three installation methods for easy, flexible setup anywhere. Secure 4-digit password with 10,000 unique combinations.	Heavy weight makes carrying tricky. Slow code changes require multiple steps. Hard to read numeric dial.

Perfect For:

This XXL Large Key Lock Box is perfect for anyone who needs a secure and durable way to store keys or small items. Whether you’re a homeowner, realtor, or business owner, this lock box offers easy installation, a large capacity, and a secure 4-digit password system. It’s ideal for emergency access or sharing keys safely.

Ready to Purchase?

View Price on Amazon (paid link)

5. YIYITOOLS Fireproof Lock Box with Key and Combination Lock, Fire Safe Document Box, Portable Fireproof Waterproof Safe for Home,Office,Travel, Secure Storage for Documents,Jewelry,Passport,Cash

YIYITOOLS Fireproof Lock Box with Key and Combination Lock, Fire Safe Document Box, Portable Fireproof Waterproof Safe for Home,Office,Travel, Secure Storage for Documents,Jewelry,Passport,Cash

This fireproof lock box keeps your items safe. It blocks heat and water. It stays strong in tough moments.
You get a key and a code lock. You can open it your way.

The box has room for papers and small items. You can take it anywhere with ease.

Pros	Cons
Fireproof and waterproof protection for your valuables. Dual locks for maximum security and flexible access. Durable, scratch-resistant design built to last. Spacious storage for documents and valuables. Portable and versatile for home, office, or travel.	No built-in handle for easy carrying. Limited size may not fit larger items. Combination lock can be tricky to reset.

Perfect For:

This fireproof lock box is perfect for anyone who wants simple, strong, safe storage at home, at work, or on the go. It’s great for people who need to keep cash, papers, and small valuables safe from heat, water, and damage.

Ready to Purchase?

View Price on Amazon (paid link)

6. Key Lock Box for Outside – Sturdy and Durable Lock Box for House Key,5 Key Capacity Lockbox for Keys Outdoor,Waterproof Emergency Spare Key Lockbox with Resettable Code for Home,Garage,Airbnb

Key Lock Box for Outside - Sturdy and Durable Lock Box for House Key,5 Key Capacity Lockbox for Keys Outdoor,Waterproof Emergency Spare Key Lockbox with Resettable Code for Home,Garage,Airbnb

The Key Lock Box is sturdy and durable, made from high-strength aluminum alloy. It can withstand hammering, sawing, and prying, keeping your keys safe. Plus, it’s rust and corrosion resistant, perfect for outdoor use.

Use it as an emergency spare key lockbox for family, friends, or guests. They can enter a code to access keys or small items when needed. You can change the code afterward to keep everything secure.

It’s easy to install and use, with no power required. The large capacity holds at least 7 house keys or small items. It’s waterproof, dustproof, and reliable for any outdoor space.

Pros	Cons
Strong build that stands up to force Safe code keeps your key protected Big space holds many keys with ease Waterproof cover shields from rain and dust Quick setup with simple install steps	Code buttons may feel small for some hands Metal body can get cold to touch Needs mounting before first use

Perfect For:

This key lock box is perfect for anyone who needs safe, easy access to their home, garage, or Airbnb. It’s ideal for busy people, families, or hosts who want to share keys securely.

Ready to Purchase?

View Price on Amazon (paid link)

7. BRILLIRARE Key Lock Box, Waterproof 4 Digits Combination Lockbox with Removable Shackle, Wall Mount Resettable Key Hider, Upgraded Large Password Boxes for Car House Office Apartment Keys-Grey

BRILLIRARE Key Lock Box, Waterproof 4 Digits Combination Lockbox with Removable Shackle, Wall Mount Resettable Key Hider, Upgraded Large Password Boxes for Car House Office Apartment Keys-Grey

Keep your keys safe with this strong, simple lock box. It is easy to use and built to last.

It has an upgraded 4‑digit code that gives you many safe combos. It stays smooth and never jams. It keeps your keys secure.

The box is thick, tough, and waterproof. It stands up to sun and rain. It holds up to five keys with ease.

You can hang it or mount it anywhere. You can set it fast. You can trust it every day.

Pros	Cons
10,000 combinations for maximum security and peace of mind. Waterproof and durable, resists rust, rain, and harsh weather. Holds up to 5 keys, perfect for travel or daily use. Easy to install, mount or hang anywhere with removable shackle.	No backup access if you forget the code. Shackle removable, might get lost if not mounted. Keys limited to 5 and shorter than 3.35”.

Perfect For:

This key lock box is perfect for anyone who needs a secure, easy-to-use way to store keys, IDs, or small items. It’s great for homeowners, renters, or businesses looking for reliable key access without hiding spares.

Ready to Purchase?

View Price on Amazon (paid link)

8. SentrySafe Black Fireproof and Waterproof Safe, File Folder and Document Box with Key Lock, Ex. 14.3 x 15.5 x 13.5 inches, HD4100

The SentrySafe Black Fireproof and Waterproof Safe protects your important items from fire and water damage. It keeps documents, valuables, DVDs, and USBs safe for 30 minutes at 1550°F. It also stays dry in up to 8 inches of water for 72 hours.

This document organizer has built-in straps for easy storage. It comes with 2 keys and a black finish, making it secure and stylish.

Pros	Cons
Fireproof for 30 minutes at 1550°F, protects valuables. Waterproof for 72 hours in 8 inches of water, flood-ready. Key lock with 2 keys, secures important documents. Built-in straps for easy organization of passports and cards.	Limited capacity: holds few documents only. Heavy: difficult to relocate. Locked without key: keys may be misplaced.

Perfect For:

This SentrySafe is perfect for anyone who wants to keep important papers and valuables safe. It’s great for families or small businesses needing fireproof and waterproof protection.

Ready to Purchase?

View Price on Amazon (paid link)

9. Rudy Run Key Lock Box for Outside – Small Outdoor Lockbox for Keys with Code, 4-Digit Combination Hidden Safe to Hide a Key Outside, Portable Safe Key Storage, 5.78 in, 1 Pack

Rudy Run Key Lock Box for Outside – Small Outdoor Lockbox for Keys with Code, 4-Digit Combination Hidden Safe to Hide a Key Outside, Portable Safe Key Storage, 5.78 in, 1 Pack

The Rudy Run Key Lock Box is a small, outdoor safe for storing keys. It has a 4-digit combination lock and a strong metal shackle to hang it anywhere.

This portable key storage is weatherproof and easy to use. It’s perfect for home, Airbnb, or work, with simple setup and secure access.

Pros	Cons
Secure 4-digit combo keeps keys safe from unauthorized access. Weatherproof design protects keys from rain, dust, and rust. Portable and easy to hang on doors, gates, or handles. Tool-free setup and quick code reset for hassle-free use.	Small size limits storage to just a few keys. No backup access if you forget the 4-digit code. Shackle strength may not withstand heavy force or tampering.

Perfect For:

This key lock box is perfect for anyone who needs secure, easy access to spare keys. It’s ideal for homeowners, Airbnb hosts, real estate agents, and property managers.

Ready to Purchase?

View Price on Amazon (paid link)

10. Plano 3440-10 Waterproof Stowaway (3400 Series)

The Plano 3440-10 Waterproof Stowaway keeps your fishing gear safe and dry. Its Dri Loc O ring seal blocks water, while three tight latches lock in place. It’s perfect for small items like phones or keys.

This tackle box is easy to carry and built to last. It’s a must-have for anyone who loves fishing or needs waterproof storage.

Pros	Cons
Keeps gear dry with Dri Loc O ring seal. Tight latches protect phones and valuables from water. Perfect size for small items and fishing tackle. Durable design ensures long-lasting use in any weather.	Limited space for larger fishing gear or multiple items. No internal dividers to organize small valuables efficiently. Bulkier design may not fit easily in tight storage spaces.

Perfect For:

The Plano 3440-10 Waterproof Stowaway is perfect for anglers and outdoor lovers. It keeps phones and small valuables safe from water and damage.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Keeping your valuables safe is easy with the right waterproof lock box. These boxes protect your items from water, dust, and damage. Find the perfect one for your needs with our guide.

Factors to Consider When Buying a Waterproof Lock Box:

Material: Choose durable materials like metal, polycarbonate, or zinc alloy. They resist wear and tear, keeping your items safe.
Size: Pick a size that fits your items. Small boxes hold keys, while larger ones store documents or gear.
Lock Type: Decide between combination locks, key locks, or both. Combination locks offer keyless convenience, while key locks provide traditional security.
Waterproof Rating: Look for boxes with watertight seals or O-ring closures. They keep water out, protecting your items in wet conditions.
Ease of Use: Opt for boxes with simple setups and easy access. Features like resettable codes or removable shackles add convenience.
Portability: Consider portable designs if you need to move the box often. Lightweight, compact options are ideal for travel or outdoor use.
Security Features: Check for tamper-resistant materials and secure locking mechanisms. Extra features like fireproof protection add peace of mind.
Capacity: Ensure the box holds all your items. Some boxes store multiple keys, while others have trays for small parts.
Installation Options: Look for boxes that can be mounted, hung, or hidden. Versatile installation methods fit various needs.
Warranty: Choose products with warranties for added protection. A warranty ensures quality and reliability.

With these factors in mind, you’ll find the perfect waterproof lock box to keep your valuables safe and secure.