10 Best Waterproof Outdoor Storage Boxes 2025 in the United States

The Keter Outdoor Storage Deck Box offers a durable solution for outdoor storage needs. Made from resin, it is resistant to weather conditions and impacts, making it suitable for various environments. The material provides a wood grain aesthetic that blends well with outdoor settings. With a storage capacity of 150 gallons, it is spacious enough to store patio furniture, cushions, gardening tools, and pool accessories. The dimensions of 61 inches long, 28.3 inches wide, and 25.2 inches tall ensure ample space for bulky items.

The hydraulic piston mechanism ensures easy opening and closing, adding convenience to its use. It has a lockable lid, though the lock is not included, which adds a layer of security to protect your belongings. Additionally, the box doubles as a bench with a weight capacity of 660 pounds, making it multi-functional and useful for seating as well. However, the box does not feature specific ventilation, which might be a drawback for items that require airflow to prevent mold or odor buildup.

The assembly is straightforward, and the scratch-resistant material ensures it maintains its appearance over time. While it is water-resistant, it may not be fully waterproof, so it might not be the best option for areas prone to heavy rains or standing water. The aesthetic appeal, ease of assembly, and functionality make it a strong candidate for those looking to maximize their patio space.

The TARKARI 180 Gallon Deck Box is a spacious and sturdy outdoor storage solution, measuring approximately 54 by 26 by 29 inches. Made from high-quality resin, it offers waterproof and UV-resistant protection, helping to keep your stored items safe from rain and sun damage. Its large 180-gallon capacity is great for storing outdoor cushions, garden tools, pool accessories, or even party supplies. The box supports up to 1200 pounds, so it can also double as extra seating or a bench on your patio.

One nice feature is its lockable flip-top lid, which adds a layer of security to protect your belongings. The box includes handles for easy moving and comes ready to use without any complicated assembly. The waterproof rating indicates it handles splashes and light rain well but might not be fully sealed against heavy or prolonged exposure.

The black resin has a clean, modern patio style that should blend well with most outdoor settings. If you want a durable, multipurpose storage box that’s easy to use and offers solid protection from the elements, this deck box is a reliable choice.

The NUNU LAB 75 Gallon Outdoor Storage Box is a solid choice if you need a large, waterproof container for your backyard or patio. Made from weather-resistant resin, it stands up well to rain, snow, and sun without rusting or peeling. Its 75-gallon size offers generous room for garden tools, cushions, pool supplies, or even package deliveries. One handy feature is that it doubles as a bench, supporting up to 660 pounds, which is great for adding extra seating outdoors. The lid opens smoothly and closes securely, making daily use easy and safe.

The box is lockable, but the lock isn’t included, so you’ll need to buy one separately for added security. Assembly is straightforward, and the black resin design is simple and functional, blending well with most outdoor spaces. At just under 45 inches long and 22.6 inches wide, it’s a good size without being bulky, but it weighs nearly 50 pounds, so plan for a bit of effort during setup.

If you want a waterproof, durable storage solution that also offers seating and decent security at a reasonable price, this box fits the bill. For those seeking built-in ventilation or an included lock, additional features will need to be added separately.