How to Prepare Your Gear for Cold Water Spearfishing Season in San Diego
San Diego’s cold water spearfishing season runs hard from November through March, when water temps drop into the low 50s and kelp forests along La Jolla Shores, Point Loma, and the Coronado Islands come alive with halibut, calico bass, and rockfish. This is prime hunting season—but cold water demands serious gear preparation. Neglect your equipment now, and you’ll pay for it with failed hunts, dangerous conditions, or worse.
Inspect and Upgrade Your Wetsuit
Your wetsuit is your lifeline in San Diego winter waters. Start by examining seams, zippers, and the overall condition of your suit. Look for small tears, compression in the neoprene (especially at the knees and elbows), and stiffness around the shoulders that restricts movement.
For cold water spearfishing, a 7mm two-piece farmer john with a 5mm jacket is the baseline. If you’re diving Point Loma’s deeper reefs or spending extended time at the Coronado Islands, consider a 7mm full suit or adding a hooded vest. The hood matters more than most spearos realize—heat loss through your head is significant, and the hood also protects your ears from the cold shock that can trigger disorientation at depth.
Check your zipper mechanism. Corroded or stiff zippers fail when you need them most. Apply a thin coat of silicone lubricant to metal zippers and work them gently back and forth. If the zipper is truly damaged, get it repaired or replace the suit before the season peaks.
Service Your Speargun and Band System
Cold water makes rubber brittle. Your bands lose elasticity in low temps, so inspect them for cracks, discoloration, or hardening. If your bands are more than two years old or show visible wear, replace them. Brittle bands don’t just underperform—they can snap unexpectedly and send the muzzle into your face.
Check the release mechanism on your gun. Sand and salt accumulate in the trigger assembly, and cold water magnifies any stiffness. Disassemble, rinse thoroughly with fresh water, and apply a light coat of silicone grease to all moving parts. Work the trigger smoothly a dozen times to ensure it fires consistently.
Inspect your shaft for rust pitting or straightness. Lay it on a flat surface and roll it slowly—any wobble means it’s bent and needs straightening or replacement. A warped shaft won’t track true and will cost you fish.
Check your muzzle and tip for damage. If you use a three-prong or Hawaiian-style tip, ensure the prongs are sharp and aligned. Dull tips bounce off fish; misaligned prongs cause frustrating misses. Sharpen or replace as needed.
Prepare Your Weight Belt and Harness
Cold water contracts your body and reduces buoyancy, but you’ll also be wearing thicker neoprene. Recalculate your ballast. You typically need 2–3 pounds more weight in a 7mm suit than in a 5mm, and the distribution matters as much as the total.
Test your weighting in the pool at the Plunge in Ocean Beach or at a safe, shallow beach location before heading to Point Loma or La Jolla. You want neutral buoyancy at the surface when fully exhaled and at rest. This prevents exhaustion and gives you precise depth control.
Inspect your weight belt webbing for fraying or tears. Replace it if it’s compromised—a failed belt means lost weights and a dangerously unbalanced dive. Check all buckles and attachment points. Salt corrodes metal, so rinse everything after every dive and apply a light silicone coat.
Maintain Your Fins and Mask
Cold water spearfishing demands efficient propulsion. Your fins take a beating. Check for cracks in the blade, missing or damaged vent holes, and separation between the blade and foot pocket. Damaged fins waste energy and can cause cramps.
Rinse your mask and snorkel thoroughly after each dive. Salt deposits fog the lens and corrode metal springs. Use a dedicated mask defog solution and apply it before every dive. A fogged mask in cold water off the Coronado Islands is a safety hazard.
Test your mask seal against your face. Cold water makes skin contract slightly, and a previously good seal might leak. Apply a thin silicone grease to the skirt for a better seal.
Final Pre-Season Checklist
- Replace or service your regulator (if using scuba)
- Inspect your dive light for cracks and battery corrosion
- Test your speargun release mechanism in the water before a serious hunt
- Confirm your dive computer or watch is functioning
- Pack a backup flashlight and knife
- Review current conditions on the Element app before every dive
San Diego’s cold water season is unmatched for productivity, but it demands respect and preparation. Gear that works in summer water will fail when temperatures drop. Spend the time now to inspect, maintain, and upgrade your equipment, and you’ll spend the season hunting confidently in some of Southern California’s best spearfishing grounds.
Keep your gear dialed in and your dives safe—check current water temperatures, visibility, and conditions with the Element app before heading out to Point Loma, La Jolla, or the Coronado Islands.