San Diego is often marketed as year-round surfable paradise with minimal gear requirements. The reality is more nuanced: San Diego water temperatures range from the low 60s in winter to the low 70s in late summer — a 12-degree swing that requires a genuine seasonal wetsuit strategy. Here’s the complete guide to choosing the right wetsuit for every month of the year in San Diego.
San Diego Water Temperatures by Month
Understanding the water temperature pattern is the foundation of any San Diego wetsuit guide:
| Month | Avg Water Temp | Recommended Wetsuit |
|---|---|---|
| January | 57–59°F (14–15°C) | 4/3mm full suit, booties optional |
| February | 57–60°F (14–16°C) | 4/3mm full suit |
| March | 59–62°F (15–17°C) | 3/2mm or 4/3mm |
| April | 60–63°F (16–17°C) | 3/2mm full suit |
| May | 62–65°F (17–18°C) | 3/2mm full suit |
| June | 63–66°F (17–19°C) | 3/2mm or 2/2mm springsuit |
| July | 65–69°F (18–21°C) | 2/2mm springsuit or boardshorts |
| August | 68–72°F (20–22°C) | Springsuit or boardshorts |
| September | 67–70°F (19–21°C) | 2/2mm or light 3/2mm |
| October | 65–68°F (18–20°C) | 3/2mm full suit |
| November | 61–64°F (16–18°C) | 3/2mm full suit |
| December | 58–61°F (14–16°C) | 4/3mm full suit |
These are averages — La Jolla upwelling can drop temperatures 5°F below the average on a given day, and El Niño years push water significantly warmer across all months.
Wetsuit Types for San Diego Surfers
4/3mm Full Suit — The San Diego Winter Standard
A 4/3mm wetsuit — 4mm thick in the core, 3mm in the arms and legs — is the standard San Diego winter wetsuit. It’s worn from roughly December through February, and by surfers who run cold from November onward.
The key number is 60°F. When the San Diego water temperature drops below 60°F, most surfers will feel cold within 30–45 minutes in a 3/2mm. A 4/3mm extends comfort to 57°F and below for most people.
Top picks for San Diego’s winter: suits with internal lining (fleece or plush) warm up faster after entry. Zip-free or back-zip designs seal better against cold flushes.
Add booties when: Water is below 58°F, or when surfing exposed reef breaks where standing on cold reef between sets is part of the experience. Sunset Cliffs and Blacks Beach locals often add 3mm booties from December through February.
3/2mm Full Suit — The Year-Round Workhorse
A 3/2mm full suit is the most versatile wetsuit in San Diego’s lineup. It’s appropriate from October through May and into June for cold-running surfers. For many San Diego surfers, a quality 3/2mm is the only suit they need for 9 months of the year.
Look for chest zip or zip-free designs for the best seal and flexibility. A well-made 3/2mm from a major brand (O’Neill, Rip Curl, Patagonia, Vissla) will last 2–4 seasons with proper care.
2/2mm Springsuit — The Summer Transitional Tool
A springsuit (short arms, short legs, or full-length suit with 2mm thickness) is ideal for San Diego’s summer when water reaches 65°F+. It provides enough thermal protection to extend sessions comfortably without the bulk of a full winter suit.
Springsuits are also popular in San Diego for water activities beyond surfing — kayaking, paddleboarding, and swimming in the 63–68°F range.
Boardshorts — Peak Summer Only
Surfing in boardshorts in San Diego is possible from roughly late July through mid-September when water temperatures reach 68–72°F at the warmest beaches (La Jolla Shores, Mission Beach shallow sandbars). Most experienced San Diego surfers still prefer a springsuit for sessions over 90 minutes — even warm water becomes fatiguing with prolonged exposure.
A rashguard or wetsuit top is a useful middle ground: more UV protection than boardshorts alone, less constriction than a full suit.
San Diego Cold Water Upwelling: The Variable You Need to Know
San Diego’s La Jolla upwelling is a localized phenomenon where cold, deep water is pulled to the surface near La Jolla and Point Loma. This can drop water temperatures 3–5°F below the regional average — sometimes more dramatically.
In spring and early summer, upwelling events can push water temperatures at La Jolla Cove to as low as 55–58°F while Mission Beach reads 63–65°F. If you’re surfing Blacks Beach or Windansea during an upwelling event in June, bring your 3/2mm even if the forecast says it’s warm season.
The Torrey Pines Outer buoy (NOAA 46225) reports water temperature — check it for the current La Jolla reading before choosing your wetsuit.
Wetsuit Care Tips for San Diego Surfers
San Diego’s sun is intense and marine layer humidity can cause mildew in improperly stored wetsuits. Best practices:
- Rinse with fresh water after every session — Salt degrades neoprene accelerates. A quick rinse extends suit life significantly.
- Dry in the shade, not direct sun — UV radiation degrades neoprene. Hang in the shade or indoors.
- Don’t fold — hang — Folding creates permanent creases that weaken the suit over time.
- Use wetsuit shampoo periodically — Removes salt, bacteria, and smell buildup. Once a month is sufficient.
Matching Wetsuit to Conditions Score
The conditions score in the Element app tells you how good the surf will be — but checking the forecast water temperature alongside it tells you what to wear. Cold water upwelling days will show lower water temperatures in the app data, giving you the nudge to grab your heavier wetsuit even on a nominally warm calendar date.
Use the Element app to plan both your session and your gear — so you’re never standing on a San Diego beach in a 2/2mm springsuit wishing you’d brought your 4/3mm.