Wetsuits and drysuits are the two main ways divers stay warm, and the difference between them is right there in the names. A wetsuit lets a thin layer of water in and traps it against your skin, while a drysuit keeps you completely sealed and dry from neck to ankles. Which one you need depends almost entirely on how cold the water is. In the warm Caribbean around Isla Fuerte the answer is simple, but it helps to understand both before you travel to colder seas.
How a wetsuit keeps you warm
A wetsuit is made of neoprene, a spongy rubber full of tiny gas bubbles that insulate against the cold. When you enter the water, a thin film seeps in between the suit and your skin. Your body quickly warms that trapped layer, and the neoprene stops it from washing away.
Thickness is measured in millimeters, from a light three millimeter suit for warm water to a thick seven millimeter suit for cooler seas. The warmer the water, the thinner the suit you need.
How a drysuit is different
A drysuit works on the opposite principle: it keeps water out entirely with tight seals at the neck and wrists and a waterproof zipper. Because no water touches your body, you stay dry and can wear warm layers underneath, just like dressing for a cold day on land.
Drysuits also add air for insulation, so they take extra training to use safely because that air affects your buoyancy. They are the tool of choice for cold water, long dives and demanding conditions.
Which one is right for you
The choice comes down to water temperature, dive length and personal comfort. As a rough guide, most divers pick based on how cold the water is.
- Warm tropical water above twenty-five degrees: a thin wetsuit or just a rash guard.
- Temperate water around fifteen to twenty-four degrees: a thicker wetsuit.
- Cold water below fifteen degrees or long dives: a drysuit.
Wetsuits are cheaper, simpler and lighter to travel with, while drysuits cost more and need training but open up cold destinations year round.
Light and easy in Isla Fuerte
Here is the good news for our waters: Isla Fuerte sits at a steady twenty-seven to twenty-nine degrees all year, so you never need a heavy suit or a drysuit at all. A thin wetsuit or even a simple rash guard is plenty, which means less weight, easier movement and more comfortable dives.
At Nautilus full gear rental is included, so a properly fitting wetsuit is always waiting for you, no purchase required. Come enjoy warm, effortless diving; start planning on our courses and dives page.
