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When most people think of scuba diving they imagine a warm tropical setting with the fantastic creatures and wrecks that have been presented in the media that we are all familiar with. Coldwater settings, though, can be equally, if not more amazing with the array of life and exploration possibilities. Places like the Arctic and Antarctic, the Isle of Man or the San Juan Islands (all places I have reviewed on this site) are all exceptionally fascinating and accessible to divers with the right equipment. Below I present the gear options so you will be ready when you get the chance to dive in cold water.
Drysuit Scuba Diving
If the water is really cold, the best choice is a drysuit. It can be pretty expensive and there are other accessories to complete the package, but is the option which will keep you warmest in the most frigid conditions.
Each drysuit has its own special features and characteristics and there is air inside it between your body and the suit that has an impact on buoyancy. Because of these factors, you need a little practice and training before wearing it on a serious dive at depth. Here is a post which provides a description of the features and considerations of drysuit diving in detail, followed by one with detailed descriptions of the best drysuits:
- Best Scuba Drysuits – Features Described and Compared
- Top 10 Scuba Drysuits of 2019 Compared and Reviewed
The water is cold and you’ve decided on using a drysuit. It will keep you dry, but only offers a minimum of warmth. You’ll need to wear something underneath that gives you proper thermal protection without overheating. The use of drysuit undergarments is the solution. This post explains the features and characteristics of drysuit undergarments and reviews 10 top models:
Drysuit gloves seal to the wrist of the drysuit. There are different systems to accomplish this including the use of a ring or zipper system. Here are several top models:
- Bare Drysuit Dry Gloves with Docking Rings & Thermal Liner
- DUI Zip Gloves Heavy Duty Dry Suit Gloves with Liners
- DUI Zip Gloves Maximum Dexterity Dry Suit Gloves with Liners
Drysuit hoods are usually made of neoprene, like wetsuit hoods, but are thick and well sealed around the face and neck. Here are several top models:
- DUI 7mm Warm Neck Self-Venting Scuba Diving Dry Suit Hood
- Aqua Lung Heat Zippered Drysuit Hood
- XS Scuba 7mm Drysuit Hood
Most divers use thick wetsuit boots with their drysuit. Some drysuits have a soft sock attached that can be worn inside wetsuit boots or durable, hard-soled drysuit boots, which add greater protection when walking over rocky surfaces:
Wetsuit Scuba Diving
Drysuits are usually pretty expensive, and as stated earlier, require some extra training and practice to become safely acclimated. For many a thick wetsuit of 7mm or more is an acceptable alternative, along with some added accessories.
A wetsuit can provide good thermal protection in very cold water if it is thick enough, fits well and has very minimal water circulation. The proper accessories provide a good assist in maintaining optimal comfort. Here are several posts to help you decide which wetsuit is right for you. The first gives you an explanation of how wetsuits keep you warm and describes the features and characteristics of good wetsuits. The others are reviews of wetsuit models generally, for women, for spearfishing, and for surfing.
- The Best Scuba Diving Wetsuit – Features and Descriptions
- Best Scuba Diving Wetsuits
- Best Scuba Wetsuits for Women
- Best Spearfishing Wetsuits
- Best Surfing Wetsuits
For really cold water, 5mm should be the minimum thickness. A well constructed and designed pair uses material like stretch neoprene that provides warmth, a flexible, comfortable fit, and sturdy seams resistant to leakage. This post provides an explanation of the best features and reviews 8 models, 4 of which come in 5mm thickness:Bare 7/3mm Ultrawarmth Hooded Vest, shown at right, is a good example. Here is a review and description of wetsuit hoods, 4 of which are 5mm or thicker:
For cold water, the full foot fin without a boot is a non-starter. You’ll want a boot with 5mm of neoprene in thickness and a thick sole is helpful. The following post describes the features and characteristics to you look for with 9 of 12 boots reviewed having greater than 5mm in thickness:
Other Cold Water Gear
When diving in extremely cold water the regulator first stage freezing up is a consideration. To avoid this, the first stage needs to have an environmental seal that won’t allow the very cold seawater to get inside. The Atomic M1 Regulator is highly rated for cold water use. Here is my post on regulators where I describe features and characteristics and review several models rated for cold water usage:
I hope you found this post on cold water equipment interesting and useful. If you have any questions or ideas, please feel free to share them in the comments section. If there is no comments section directly below, click here: >>comments<<