Spearfishing Mackerel Runs in San Diego: Timing the Spring Migrations

Spring mackerel runs are the heartbeat of San Diego’s spearfishing season. When the water warms and baitfish move north, Pacific and jack mackerel follow in dense schools—and that’s when spearos strike. But timing is everything. Miss the window by a few weeks, and you’re hunting scattered fish instead of feeding frenzies.

When Mackerel Runs Peak in San Diego

The spring mackerel migration typically begins in late March and intensifies through May, though the exact timing shifts year to year based on water temperature and baitfish availability. Pacific mackerel usually arrive first, moving up the coast as sea surface temperatures climb above 58–60°F. Jack mackerel follow close behind, often overlapping with Pacific runs through April and May.

Your window is tightest in April and early May. That’s when schools are densest and most aggressive, feeding hard on pilchard and anchovy runs. By June, the action fragments as fish disperse into deeper, cooler water or move further north toward Santa Barbara and Central Coast regions.

Key San Diego Spearfishing Zones for Mackerel

Point Loma and the Kelp Forests The kelp beds around Point Loma’s outer reefs heat up early in spring. Mackerel school along the deeper edges of the kelp forest—typically 45–70 feet—where they hunt smaller baitfish. Expect consistent action from late March through May.

La Jolla Shores to Bird Rock The shallow reefs and sandy channels between La Jolla Shores and Bird Rock attract feeding mackerel schools, especially on rising tides. This zone warms faster than deeper offshore areas, making it productive in early spring (March–April). Water clarity here is reliable, giving you better visibility for shot placement.

Torrey Pines to Del Mar The deeper reefs and rocky outcrops from Torrey Pines southward see sustained mackerel presence through the entire spring run. Fish here tend to be larger and more cautious, but the abundance makes up for the challenge.

Mission Beach and South Bay The shallow reefs and kelp around Mission Beach and south toward the South Bay kelp beds light up in late April and May. This zone is warmer and attracts younger, more aggressive mackerel—excellent for newer spearos or if you prefer faster action.

Reading Water Temperature for Predictability

Mackerel follow thermal fronts and warm-water pulses. Monitor sea surface temperature (SST) daily—this is your single best predictor of migration timing and fish density.

• 58–60°F: Early scouts begin moving north; sparse, scattered fish.
• 60–62°F: Main run begins; schools form and densify.
• 62–65°F: Peak feeding; largest schools, most aggressive behavior.
• 65°F+: Fish move deeper or offshore; coastal hunting becomes harder.

San Diego typically sees SST climbing into the 62–64°F range by mid-April. Check NOAA’s SST maps or use your dive computer to track thermal conditions at specific reefs.

Tidal and Light Conditions Matter

Mackerel are most active on rising tides, especially the first 2–3 hours of the flood. This is when baitfish move into shallow reefs and mackerel feed aggressively. Slack high tide and early outgoing water still produce, but the bite softens.

Early morning light—first 1–2 hours after sunrise—gives you the best combination of fish activity and water visibility. Afternoon hunts are productive, but morning dives consistently outfish evening sessions during spring runs.

Gear and Tactics for Spring Mackerel

Mackerel are fast and often hunt in open water rather than tight kelp. Use a mid-range speargun (36–40 inches) for maneuverability, and consider a two-band or three-band setup for faster bolt speed. Mackerel move quick; slower guns mean more misses.

Fish in open water and along kelp edges rather than deep inside the forest. Mackerel are ambush feeders—they’ll dart out from cover to hit baitfish, then retreat. Position yourself along natural funnels and reef edges where schools transition between depths.

Use minimal weight to stay neutral and mobile. You’ll be doing more hunting and less anchoring during spring runs; excess weight slows you down.

Spring 2025 Expectations

Based on historical patterns, expect the 2025 spring run to follow typical timing: late March entry, peak action April 15–May 15. Watch SST in late February and early March—if water warms quickly, the run could start earlier.

Get in the water consistently from mid-April through May. One solid day of hunting during peak season can yield 10+ fish. Miss those weeks, and you’re grinding for singles through summer.

Track conditions in real-time with Element. Get alerts when water temps and swell align with peak mackerel activity at your favorite San Diego reefs.