10 Best Underwater Metal Detectors 2025 in the United States

The GreenRex Metal Detector is designed for both professional and beginner users, offering a versatile and user-friendly metal detecting experience. With its 5 professional detection modes including All Metal, Disc, Memory Mode, Jewelry Mode, and Pinpoint (PP) Mode, users can efficiently detect a variety of metals such as coins, relics, jewelry, and gold. The device utilizes an advanced DSP chip and auto-balance technology, allowing it to detect objects up to 7 inches deep, which is decent for casual treasure hunting.

The 10-inch IP68 waterproof coil expands its use to shallow waters, making it suitable for beach and river searches, although the control box is not waterproof, limiting its fully submerged use. The detector features a large, easy-to-read backlit LCD and ergonomic design, enhancing comfort during prolonged use. It also offers quick setup, adjustable length, and one-handed operation, making it travel-friendly and convenient for all users, including children. The included premium accessories like headphones, a foldable shovel, and a carrying bag add value.

However, at 6.16 pounds, it might be slightly heavy for some users. This detector would best suit hobbyists and families interested in exploring metal detection in varied terrains, especially near water.

The MINELAB X-Terra PRO Waterproof Treasure Metal Detector stands out with its Pro-Switch technology, allowing users to switch frequencies for deeper detection in various conditions. It is fully waterproof and can be submerged up to 16 ft (5 m), making it ideal for underwater treasure hunting. The device offers three detect modes (Park, Field, Beach), catering to different environments and types of treasures, and features a built-in flashlight and backlit keypad for night searches.

Audio control options enhance the ability to distinguish between trash and treasure, and its compatibility with both wired and wireless headphones adds convenience. At 2.9 lbs (1.3 kg), it is lightweight and portable, ensuring user comfort during long sessions. The device is compact and easy to pack, although its sensitivity and depth capabilities may not be as advanced as some higher-end models.

The battery life, powered by a single lithium polymer battery (included), is sufficient but may require frequent charging during extended use. With an IP68 rating, it offers solid protection against dust and water. While its operating frequency of 7.69 KHz is good for general metal detection, it might not perform as well in highly mineralized soils. It is evident that users appreciate its performance and features, making it a strong contender for both hobbyists and more serious treasure hunters.

The Garrett AT Pro is a versatile metal detector well-suited for underwater treasure hunting up to 10 feet deep, making it a good choice for shallow water use. Its waterproof design and lightweight aluminum build (about 1.37 kg) help with comfort and ease of handling in wet environments. It offers fast recovery speed and good target separation, which means it can quickly identify different objects without much delay.

The detector includes 40 levels of iron discrimination, allowing users to filter out unwanted iron trash more precisely, helping focus on valuable targets. The Pro Mode Audio with proportional sound and tone roll enhances the ability to judge how deep or conductive a target is, which is useful for more accurate digging decisions. The inclusion of MS-2 headphones boosts faint signals and reduces outside noise, making it easier to concentrate.

Battery life depends on user replacement but is powered by standard batteries, which is common but less convenient than rechargeable options. The Garrett AT Pro balances durability, performance, and user-friendly features, making it a solid pick for hobbyists who want to explore both land and underwater environments without diving too deep.