I have surfed and swum in everything from bath-warm tropics to teeth-rattling Pacific winter sessions, and the single biggest gear mistake I see is people guessing on wetsuit thickness. The thickness number is not about the air temperature, it is about water temperature and how long you plan to stay in. Here is the chart I actually use, the five suits I trust at different temperatures, and the buying logic that ties it together.

SuitThicknessBest Water TempStyleEst. Price
ONeill Hyperfreak 4/34/3mm55 to 62 FFull suit~$150-400
Rip Curl Dawn Patrol 3/23/2mm62 to 68 FFull suit~$60-150
Xcel Comp 2mm Spring2mm68 to 75 FSpring suit~$60-150
Cressi Morea 5mm5mm50 to 58 FDive full suit~$150-400
ROKA Maverick X3/2mm60 to 75 FOpen water swim$$$$

1. ONeill Hyperfreak 4/3 - Verdict: Best for cold surf sessions

The Hyperfreak 4/3 is the suit I default to anywhere west coast water sits in the high 50s. The TechnoButter neoprene is lighter and more flexible than typical 4/3 builds, so paddle fatigue is noticeably lower over a two-hour session. The chest zip seals well and I have not had flushing issues even on duck dives. Sizing runs slightly long in the torso, so check the chart against your inseam too. The taped seams are durable enough that mine still looks new after two seasons. Check on Amazon โ†’

2. Rip Curl Dawn Patrol 3/2 - Verdict: Best three-season value

The Dawn Patrol 3/2 is the suit I recommend for anyone surfing temperate water year-round on a normal budget. The flash-lined chest panel cuts wind chill on the paddle out, and the back-zip design is easier to get in and out of if you are new to wetsuits. Flexibility is good but a notch below the Hyperfreak. I would not push it below 60 F for long sessions, but in spring and fall it covers most of what I need without spending top-tier money. Check on Amazon โ†’

3. Xcel Comp 2mm Spring - Verdict: Best for warm water surf

When the water hits the upper 60s, a full 3/2 starts to feel like a sauna. The Xcel Comp 2mm short-sleeve spring suit is what I switch to, and it is light enough that I forget I am wearing it. The neoprene is supple and the seams have not blown out despite plenty of pool sessions for cross-training. For tropical trips it doubles as sun protection. Below 68 F you will get cold fast, so this is a true warm-water piece. Check on Amazon โ†’

4. Cressi Morea 5mm - Verdict: Best for cold-water diving

For scuba in cold lakes and the Pacific Northwest, the Cressi Morea 5mm is the entry-level pick I keep coming back to. The 5mm neoprene plus the bib-style hood liner keeps me warm for a 45-minute dive in the low 50s. It is bulkier than a surf suit and not designed for high mobility, but that is the trade you make for warmth at depth. Pair it with 5mm boots and gloves. Sizing is generous, so try it on with a base layer. Check on Amazon โ†’

5. ROKA Maverick X - Verdict: Best for open-water swimming

The Maverick X is built specifically for triathlon and open-water swimming, and the shoulder mobility shows. The 3/2 thickness with thinner panels at the shoulder lets me hold a longer stroke without the rubber tugging back. Buoyancy panels at the hips lift my legs, which fixes the most common mistake new open-water swimmers make. It is not a surf suit and the knees will not hold up to board wax, so use it only for swimming. Check on Amazon โ†’

How to Choose

Start with water temperature and session length, not air temperature. As a rough rule, 75 F and up needs nothing or a shorty, 68 to 75 F needs a 2mm spring, 62 to 68 F needs a 3/2 full, 55 to 62 F needs a 4/3 full, and below 55 F means a 5mm with hood, boots, and gloves. Sealed or taped seams matter more than the millimeter rating in cold water because flushing kills warmth fast. Finally, fit matters more than brand. A loose suit will flush at every duck dive, and a too-tight suit will exhaust you in twenty minutes.

Frequently asked questions

What thickness wetsuit do I need for 60 F water?+

A 4/3mm full suit is the standard pick for water in the high 50s to low 60s F. Add boots and a hood if you are surfing for more than an hour.

Is a 3/2mm enough for spring surfing?+

In water above 62 F, yes. Below that a 3/2mm will leave you shivering after about thirty minutes, so step up to a 4/3mm with sealed seams.

Do I need a hood for cold water?+

Below 55 F a hood is not optional if you are out for an hour or more. Heat loss through the head is significant, and a hood also protects against ear infections from cold water.

Independent video for additional perspective on Wetsuit Thickness Guide.

Third-party YouTube content. Watch on YouTube.
RC
Author

Riley Cooper

Health Devices & Outdoor Equipment Editor

Riley Cooper reviews health and personal care devices, outdoor power tools, and garden equipment at The Tested Hub. With a background in physical therapy and years of hands-on product testing, Riley evaluates health devices with a practical, clinical eye and puts outdoor gear through real-world use across the seasons. From blood pressure monitors and massage guns to lawn mowers and irrigation tools, Riley focuses on what actually holds up in everyday use.