NorCal Salmon Surge as Upwelling Cools Bay-Area Waters

What's Biting

What's Next

With northwest winds holding at 10-12 m/s across both offshore buoys, the upwelling pattern that refreshed NorCal coastal temperatures should persist into the weekend. When northwest winds sustain at this level, the thermocline stays compressed and bait concentrates at depth where salmon are actively hunting, conditions that tend to hold for several days after a wind event of this magnitude.

Salmon remain the headliner through the weekend. If you are running out of Half Moon Bay, the zone below Pigeon Point highlighted by Western Outdoor News — Saltwater is worth the extra fuel. Captain Jared Davis of the Salty Lady specifically credits the cooled water for improving marks there. For boats launching from Bodega Bay, the same upwelling dynamics apply to the waters off Bodega Head. The 53°F surface reading at buoy 46026 suggests the water column is similarly refreshed north of the Golden Gate. Troll cut-plug herring or anchovies at depth where baitfish are holding; flasher rigs are standard along this stretch of coast.

Full moon timing adds a planning layer for the weekend. Full moon tides produce the largest tidal swings of the month, translating to aggressive rip currents at bay entrances and through the Golden Gate. Strong tidal movement also concentrates striped bass and halibut on structure edges and channel drops inside the bay. Breaking conditions at the bar can complicate morning departures, so check bar forecasts the night before and plan to cross during the calmer outgoing window before afternoon onshore winds build.

Inside the bay, halibut and striped bass typically benefit from the full moon tidal push. Stripers follow baitfish pushed through bay channels by the current; work live anchovies or swimbaits along rip edges and structure points. Halibut stack on sandy bottom near channel margins. Drift with live bait or slow-roll a paddle tail near bottom for the best shot during the tidal swing.

Rockfish and lingcod are a year-round anchor along NorCal offshore structure. With bait concentrated by upwelling and water temperatures in the productive 53-54°F band, mid-depth reefs and pinnacles out toward the Farallon Islands and Bodega Head should be holding solid numbers. Check state regulations on depth restrictions and bag limits before heading out, as rockfish management areas can shift season to season.

Best timing windows: early slack before southwest afternoon winds build, and the first two hours of incoming tide in the evening. Full moon nights can also produce topwater striper action in shallow bay zones for those willing to fish after dark.

Context

Late May is historically one of the stronger windows for Chinook salmon along the NorCal coast, and conditions right now appear to be running on or slightly ahead of a typical schedule. The upwelling pattern (northwest winds driving cold, nutrient-rich water to the surface) is a defining feature of Northern California's spring and early-summer fishing calendar. In most years this thermal reset occurs between mid-May and mid-June, pulling water temperatures from the upper 50s into the low 50s and concentrating anchovies and other forage that draw Chinook within trolling range.

What stands out this season, per Western Outdoor News — Saltwater, is that water temps were running unusually warm near Pigeon Point (58°F at the April opener) before the recent upwelling pulse corrected the trend. That early-season warmth can push fish deeper and make them harder to locate on marks, which is likely why captains out of Half Moon Bay are specifically calling out the temperature drop as the key factor in the improving bite.

Bodega Bay sits at the northern end of the San Francisco-to-Monterey coastal corridor and typically tracks a week or two ahead of Half Moon Bay in terms of upwelling intensity, given its greater exposure to prevailing northwest winds. When conditions at Half Moon Bay are improving, the waters off Bodega Head tend to already be in peak form for late-spring salmon.

The 53°F reading at buoy 46026 places the bay area squarely in the productive range for both Chinook salmon and the region's inshore species. If the upwelling holds through the next several days, as the current wind readings suggest, this late-May window has the makings of a strong push heading into June.