The 5 Best Under Water Metal Detector

Best Under Water Metal Detector

Have you ever dreamed of finding buried treasure? They say trillions of dollars’ worth of gold and other precious treasures are found in shipwrecks under the sea. What better way to look for underwater treasure than to use the best underwater metal detector. This type of metal detector is highly-specialized in finding precious metals, coins, and relics underwater. And to help you get started, here are five of the top underwater metal detectors in the market today.

What is the best metal detector for underwater use?

There are three types of metal detectors: land metal detectors, gold detectors, and underwater or beach metal detectors. If you want to search for underwater treasures such as gold coins, relics, and other materials, you need an underwater or beach metal detector. This type is waterproof to a certain depth and number of minutes. These detectors are very sensitive as these can search for precious metals (gold, silver, nickel, iron, etc.) even with debris and other obstacles.

Simple underwater metal detectors may be taken 10 feet or 3 meters underwater for a few minutes. There is also professional detection equipment that deep-sea divers and underwater treasure enthusiasts use. These are highly-specialized equipment that can go deeper for hours underwater.

How did we choose these top five metal detectors for underwater use?

The five best underwater metal detectors on our list are available for beginners and experts. We checked these out at and used customer reviews, ratings, product specs, and features to come up with the best of the best. There are many underwater metal detectors, but these five are currently the most highly-rated products.

The following are the five best underwater metal detectors that will surely help you stay in your game.

Garrett AT Pro

Consumer Score: 95%, gave it a 4.6 out of 5

A Garrett metal detector with easy to read display and free Garrett headphones


  • Waterproof metal detector up to 10 feet deep
  • Can be used in freshwater or saltwater
  • With ground balance when used in saltwater
  • Comes with Garrett headphones
  • With large, easy to read screen
  • With armrest strap


  • Handle is non-adjustable
  • The volume of headphones is non-adjustable

The Garrett AT Pro is a waterproof metal detector that you can use up to 10 feet or 3 meters. It is a versatile device that can be used in saltwater and freshwater to look for precious metals, relics, and treasure.

It has an easy to use, the large control panel that easily tells you what’s going on. The LCD can tell you easily how deep the targeted object is, how sensitive the settings are, and the battery left on the detector. You can customize the AT Pro with ease by using iron discrimination, notch discrimination, and sensitivity buttons. Change modes from custom, pro, coins, and zero settings and pinpoint exactly on your target.

The AT Pro also features a longer handle, with padding to keep your grip. The armrest is also padded with a convenient strap to keep this detector on you no matter where you go. It also comes with a free headphone so you can listen closely despite working in a very busy area. This Garrett metal detector comes with a 2-year warranty, which gives you more value for your money.

Garrett ACE 300 Metal Detector

Consumer Score: 98% gave it a 4.7 out of 5

A Garrett metal detector with a waterproof coil and comes with all accessories you need.


  • Comes with complete accessories
  • With waterproof and submersible coil
  • With headphone volume control
  • With armrest strap
  • LCD easy to see
  • With search coil cover
  • Easy to adjust


  • Non-adjustable handle
  • Complaints that the padded handle is too close to the armrest

If you’re starting a metal detecting, relic hunting hobby, then you need the Garrett ACE 300. This is a set with all the accessories you need to start right away. This metal detector has a submersible search coil that can be used in deeper waters, not just the beach. It has updated features with pulse-width modulation, easy electronic pinpointing, multiple sensitivity, search modes, and depth settings, and coin depth indicator.

The LCD has large fonts that are easy to read even when you’re from a distance. The LCD tells you everything, including battery power and coin depth (2, 4, 6, or 8 inches deep). Meanwhile, the detector’s handle is non-adjustable but comes with a soft foam padding for added comfort. The armrest is also well-padded with a strap to keep the detector on your hand even as you deal with strong water currents.

All the accessories you need are included in the set. It comes with a compatible Garrett headset, control panel cover, a set of batteries, and a search coil cover.

Fisher 1280X-8

Consumer Score: 90%, gave it a 4.2 out of 5

An analog metal detector that works underwater with pinpoint controls


  • Can be used on saltwater and freshwater
  • With pinpointing controls
  • With all-metal auto-tune controls and large –target sensors
  • Lightweight metal detector


  • Manual ground balance

The Fisher CZ21-8 is built for underwater use. This tough metal detector is useful in saltwater or freshwater and can be submerged up to 250 feet. This metal detector uses dual-frequency Fourier domain signals to pinpoint exactly where the target or treasure is.

The CZ21-8 is all analog. It offers a no-fuss manual ground balance and can be used even in highly-mineralized soils. You can tweak its performance using the all-metal auto-tune mode, ground, and sensitivity. And compared to other detectors, you can adjust the volume on your headset

Use the 3-tone audio to easily distinguish from your target object and trash. This detector comes in 8 and 10-inch coils with an operating frequency of 5 and 15 kHz. This is a metal detector good for shallow water, beach, and surf or diving use.

Garrett at MAX

Consumer Score: 85%, gave it a 3.8 out of 5

Garrett metal detector with a large 12” coil with a traveling case.


  • Comes with a large 12” search coil
  • Comes with a soft-storage traveling bag
  • With a detector sling
  • With arm strap


  • Analog controls
  • No meter or LCD
  • Does not come with a headphone

The Garrett ATX uses special pulse induction technology to help you find relics, coins, and treasure even underwater. This comes with a large 12-inch waterproof search coil and waterproof headphones so you can concentrate on sounds even when you’re in a noisy environment.

The ATX comes in a complete set with all the accessories you need, including a convenient sling, headphones, rechargeable batteries, battery charger, and AC adaptors. All these accessories will help you get started on your hobby right away.

It’s worth noting that this metal detector is very easy to take anywhere. It is a regular-sized detector, but it may be folded down to a small device and placed inside a bag. And because it’s convenient and easy to carry, you can take it wherever you wish to go treasure hunting.

Nokta Makro Simplex

Consumer Score: 95%, gave it a 4.6 out of 5

A metal detector that’s fully submersible for the night and underwater use


  • Completely submersible up to 10 feet or 3 meters
  • With an adjustable, power on and off volume control
  • With notch/discrimination
  • With different search modes
  • Easy to read LCD with backlight and key backlight
  • With LED flashlight
  • With armrest strap


  • Non-adjustable handle
  • Hard to push buttons
  • Does not come with a headset

The Nokta Makro Simplex is IP68 rated for being waterproof, submersible to a depth of 10 feet. It won’t rust even when used in demanding treasure hunting activities. Listen to the tone; it has an iron volume control that you can turn on/off and adjust the volume. You can use the notch discrimination that will help you distinguish the metals you want to look for and trash.

There are four search modes to choose from all metal, beach, park, and field. The large LCD also tells you how strong your battery is, sensitivity levels, and so many more. The LCD is bright and readable because of its LCD backlight function. The keypads also come with a backlight so you can easily tweak this metal detector even in water.

The armrest is non-padded but comes with a strap to keep the metal detector on hand as you explore underwater terrain. Finally, it also comes with a special LED flashlight to help you see your surroundings better. 


From our five metal detectors for underwater treasure hunting, we selected the Garrett AT Pro waterproof metal detector as the best. There are many reasons why we chose this device. First, it can be used up to 10 feet or 3 meters and is effective for saltwater and freshwater to search for precious metals, relics, and treasure.

Another reason why the AT Pro is the best is that it’s easy to use with a large control panel. You can customize using the iron discrimination, notch discrimination, and sensitivity buttons and move from different modes from custom, pro, coins, and zero settings and pinpoint your target.

We also admire the AT Pro because of its user-friendly features. It has a longer handle, with padding to make it easier and more comfortable to grip. The armrest is also padded and comes with a free headphone so you can continue working in a very busy area. This Garrett metal detector is also covered by a 2-year warranty, which adds value for your money.

If you think that the Garrett AT Pro is the best underwater metal detector, check this out at this link.


The following are the most common questions that people have when it comes to underwater metal detectors

Can underwater metal detectors work in freshwater and saltwater?

Most underwater metal detectors will work in freshwater and saltwater, but it’s best to check out product specs to make sure. Take note that some metal detectors that claim its waterproof may not work in saltwater, so it’s best to double-check the specs or contact the manufacturer to be sure you’re buying the right one for your metal detection needs.

Can you use an underwater metal detector on land?

Yes, most underwater metal detectors can be used on land. If your hobby is moving from water to land or land to water, then an all-around, land, and water metal detector is the best choice for you. This type is rugged, automatic, and can help you work on all environments.

Can you keep any treasure (coins, relics, and precious metals) that you find with your metal detector?

There are special rules regarding the use of metal detectors on common land. You should check these rules out before you use a metal detector on common land. Relics, treasure, and coins found underwater must be reported

What are the metals that you cannot find using a metal detector?

Stainless steel cannot be detected by a metal detector because it is non-conductive. Stainless steel has the lowest magnetic conductivity and will not produce any kind of signal to be identified. The most common metals that you can easily detect by basic metal detectors are nickel, iron, aluminum, brass, and copper.

Can a metal detector really find gold?

Yes, metal detectors can find gold because this precious metal has very strong conductivity. Compared to copper and silver, gold can outlast these two and will remain conductive even for a very long time. Also, gold is a ductile material and can be drawn to think pieces of wire.

Some metal detectors can detect gold better than others as these are equipped with enhanced detection systems. People prospecting gold use updated and very sensitive gold detecting equipment, not just traditional metal detectors.