For diving in Hawaii, a 3mm full wetsuit is typically ideal. The waters around Hawaii are warm, averaging between 75–80°F (24–27°C) throughout the year, so a thicker wetsuit isn’t usually necessary. Here are some factors to consider when choosing the right wetsuit:

1. Thickness: A 3mm wetsuit provides enough warmth for most divers, balancing comfort and flexibility. If you tend to get cold easily, you might want to bring a 5mm suit, especially if you’re diving deeper or during the winter months when water temperatures can be slightly cooler.

2. Full-Length vs. Shorty: A full-length wetsuit offers better protection from potential scrapes, stings, or jellyfish encounters. However, some divers find a shorty wetsuit (covering only the torso and upper limbs) to be comfortable in Hawaii’s warm waters, particularly for shallow dives or if they don’t get cold easily.

3. Fit and Comfort: Choose a wetsuit that fits snugly but allows for easy movement, as an ill-fitting wetsuit can make for an uncomfortable dive.

4. Type of Diving: For deeper or multiple dives in a single day, a 3mm full wetsuit is best to keep warm over extended periods. If you’re snorkeling or doing a single shallow dive, you might find a shorty or thinner wetsuit more comfortable.

Overall, a well-fitted 3mm full wetsuit is the most versatile choice for diving in Hawaii’s warm waters, offering comfort, warmth, and protection.

Here are four popular places on Oahu where you can rent wetsuits and other diving gear:

1. Dive Oahu (Waikiki and Honolulu)

Dive Oahu has multiple locations and offers wetsuit rentals for certified divers. They also provide full gear packages if needed. Dive Oahu is known for friendly service and high-quality equipment, plus they can help arrange dive trips if you’re interested.

2. Hanauma Bay Dive Tours (Hanauma Bay area)

Located near the famous Hanauma Bay, this dive shop offers rentals for wetsuits and other dive gear. Hanauma Bay Dive Tours is a convenient choice if you’re planning dives in that area. They also offer shore dives and guided tours if you’re looking to explore nearby reefs.

3. Waikiki Dive Center (Waikiki)

Waikiki Dive Center is a popular shop in Waikiki that rents wetsuits and diving equipment, and they cater to certified divers. They offer a range of sizes, and their rental process is straightforward. This is a good option if you’re staying in Waikiki and want a shop close by.

4. Banzai Divers Hawaii (North Shore)

Banzai Divers offers wetsuit rentals and specializes in North Shore diving, which has some unique dive sites. They cater to certified divers and provide guidance on dive conditions and locations. Banzai Divers also offers charters if you want to explore further offshore.

Requirements for Certified Divers

Since you’re already certified, you’ll need to bring your dive certification card (such as a PADI or SSI card) to any rental shop. Most shops require this as proof of certification before renting out scuba gear. In addition to the card, be ready to show photo ID if needed. If you haven’t dived recently, some shops may ask about your recent dive experience to ensure you’re comfortable in the water.

If you’re looking to join a dive tour or charter, most shops are happy to include certified divers on their tours, and they may suggest refresher dives if it’s been a while since your last dive.