When you’re out exploring the depths of the oceans, a dive knife can come in handy in many situations. If you want to catch your diving partner’s attention, simply knock the knife on your tank. The sound will spread like wildfire under the water.

If you see sea animals in danger, such as sea turtles or dolphins entangled in nets, you can aid in setting them free. The options are endless, and if you can help save innocent creatures in their time of need, what better way is there to help out? One thing is sure, however: it’s much better to be equipped with a diving knife (even two) instead of not having one. It’s better to be safe than sorry, but how do we know which dive knife is best?

The ideal dive knife helps provide you and your diving partners with a tool that can aid in many various situations. Whether that’s to help you or the surroundings around you, it’s a good investment to have it with you. That’s why we are providing you with the best dive knife choices below, in a summarized bite-size format!

View The Best Dive Knife Below

1. Promate Scuba Diving Snorkeling Sharp

Promate Scuba Diving Snorkeling Sharp

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The Promate is a dive knife that has been quoted to look stunningly like one of the high-shelf dive knives that you pay hundreds of dollars for. Despite that, it remains available at a budget price and has been serving divers for a quite a while now. Its blade is made of 304 stainless steel, the same as the stainless steel hammer that is located at the bottom of the handle.

The knife can be easily retracted from its sheath and is praised for its quick release. If you decide that it’s time for a little polishing & cleaning, the Promate can be easily disassembled to enable you to do so. Its overall length equals to 10.5 inches, with the blade itself measuring in at 5 inches.

+ 8 colors available
+ Budget price
+ Quick release
+ Stainless steel blade
+ Easy to disassemble

Why we like it – The handle comes in various colors, from green to pink to blue and more. If you’re traveling with buddies, it’s a good way to track whose knife is whose with these color codes.

2. Scuba Diving Knife with Leg Straps

Scuba Diving Knife with Leg Straps

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It’s not for naught that the Punada dive knife has been listed as a best-seller among its contestants. It’s the ideal tactical knife that can aid in various situations, both indoors, outdoors, underwater and out on land. If you are looking for something versatile, then this dive knife can provide you with all the functions you seek.

It’s made of 440c stainless steel and has been stated to be perfect for scuba diving. Its sharpness will allow you to cut through anything you need, whether its nets or weeds you might be immobilized by.

Its portable design will also give you the convenience to use all the features of the dive knife, wherever you may dive or venture. The knife itself measures 8.65 inches and is most certainly a heavy-duty make. You can release the blade thanks to one quick button, which eliminates any fussing underwater.

+ Quick release through 1 button
+ Comfy handle
+ Multi-functional
+ Measures 8.65 inches
+ Fully portable

Why we like it – Punada offers you a 100% money back guarantee should their knife not live up to your expectations. Either a refund or a replacement is not a problem and can be arranged quickly and efficiently thanks to customer support.

3. Promate Scuba Dive Snorkel Titanium Knife

Promate Scuba Dive Snorkel Titanium Knife

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The Promate Titanium snorkel dive knife looks attractive from the get-go with its colorful handle. You can get this particular knife in 10 color variations. If you are going on a trip with friends or with family, it’s a good idea to purchase different colors for everyone. This way, you will be able to easily distinguish which dive knife belongs to who.

The handle is also molded from rubber, which ensures that the knife won’t slip from your grasp under the water. The knife itself also doesn’t require any particular maintenance thanks to its stainless steel make.

A titanium hammer is also present within this design and is located at the bottom of the handle. The length of the blade equals to 4.45 inches however the actual overall length of the knife is 9.45 inches. When ordering this dive knife, you will also be supplied with straps and a sheath for the ultimate portability.

+ Rust-free titanium
+ Ergonomic rubber
+ Straps for leg attachment
+ Lightweight
+ Easy-grip handle

Why we like it – If you will decide to purchase this knife, you will have to choose between a sharp tipped and blunt tipped alternative. There is also double-button push release for maximum security; the knife has a quick response and emerges immediately without pause.

4. Cressi Borg, Long Blade Knife for Diving

Cressi Borg, Long Blade Knife for Diving

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The Cressi is an authentic dive knife that has been produced to be used predominantly for this purpose. The company, based in Italy, has been producing these knives since the beginning of 1946. If you want to put your trust in a dive knife that will have little to no option of failing you, then the Cressi Borg is where you should place your debts.

The blade itself is manufactured from stainless steel imported from Japan. This Cressi is actually a blunt tip variation of the dive knife; one side of the blade is straight, while the other is serrated for ultimate versatility and comfort. The sheath is supplied with a locking mechanism that supports a one-hand release. It’s perfect for strapping around your leg, it has a strong and sturdy build and can be grabbed and used with ease.

+ Great precision
+ Strong & Versatile
+ Superior stainless steel
+ Reliable locking mechanism
+ Thick blade

Why we like it – Sometimes dive knives come in sizes that are just too small to be used effectively. This knife, however, gives the perfect balance of a precise cut and the ideal size.

5. MahiMahi Spearfishing knife – diving knife

MahiMahi Spearfishing knife - diving knife

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If you have been searching for a dive knife that you can use during your snorkeling endeavors, then the MahiMahi may be just the right fit. It’s perfect for beginners and regular divers, and an ideal companion for someone who is scuba diving regularly.

The knife itself is extremely pointy and can cut through just about anything. If you will find yourself entangled in an unfortunate situation, this diving life can be your only way out.

The sheath comes with a secure lock which ensures that your knife won’t slip out during your dives. You can strap the knife either on your forearm or leg thanks to the rubber strips that will hold the knife tightly against your body. Should you need to use it, you can release it within seconds and get to work.

+ Secure lock
+ Audible click
+ Stainless steel
+ Very sharp tip
+ Perfect for diving

Why we like it – If you decide to buy one MahiMahi dive knife, you can get the second one at 10% off! It’s a great deal since it’s always a good idea to have a backup knife within reach.

Dive Knife Buyers Guide

What to look for when buying a dive knife

A dive knife will accompany you through all of your diving and snorkeling adventures. It may also be the only thing that you can save you if you encounter trouble within the ocean depths. Whether you get entangled or see an ocean creature imprisoned within a fishing net, having something that can help is priceless.

Stainless Steel

Possibly the most important thing when buying a dive knife is ensuring that the blade steel is stainless. As well as any other steel accessories that may be located on the knife. This will ensure that your knife doesn’t rust and get weakened. You should still, however, ensure to rinse the knife with clean tap water before putting it back into its sheath. This will prevent any of the potential saltwater getting lodged within the crevices.

Sharp vs. Blunt

The reason a lot of divers use a blunt knife is that you don’t need to pay so much attention to injuring your gear. With a sharp tip knife, you may accidentally cut your hose or suit. Both have their uses, and in essence, it’s good to have both. Most divers have the blunt knife mounted on their forearm for easy general use, and the sharp tip around their ankle. The sharp tip only being used in a real case of emergency.

Sheath & Straps

Most dive knives nowadays come with a sheath and a strap so that you can mount it on your forearm or leg from the get-go. This is a great convenience, and you rarely have to go out and search for these things yourself. When diving, having a reliable knife is almost as important as having a sturdy sheath. After all, what can you do if your straps get loose or unlock and you end up losing your knife?


Now that you have a grasp of the basics, you can go and search for your ideal dive knife. Remember, you should feel comfortable when handling it; a good knife is like an extension of a diver’s arm!

Expert Tip

When diving, make sure to strap the dive knife somewhere where you know you can heavy easy access to it. Too often do beginners strap the knives somewhere where it’s impossible to reach them, and get themselves in unfortunate situations because of this.

Did you know?

The word “scuba” hasn’t been chosen by chance, it’s an acronym and it actually stands for “self-contained underwater breathing apparatus.”

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