NorCal Chinook turning on as upwelling cools the coast

What's Biting

What's Next

The northwest wind pattern holding seas above 10 feet at both offshore buoys is the main obstacle to getting out right now. Readings of 11 m/s at NOAA buoys 46026 and 46013 are consistent with the classic late-spring northwesterly that defines this stretch of coast through May and June. The downside is the rough water; the upside is that this same pattern is doing the ecological heavy lifting, driving the upwelling that cools the surface, stacks anchovies and other baitfish, and creates the staging conditions that Chinook have been waiting for.

When the wind backs off and seas settle to a workable range, the bite should respond quickly. Captain Jared Davis of the Salty Lady noted that the cooling water looks noticeably different off Pigeon Point (Western Outdoor News — Saltwater), suggesting visible color lines and temperature breaks worth targeting with trolling spreads in the 150-200 foot range. Allen Bushnell's Monterey report (Western Outdoor News — Saltwater) corroborates the setup, describing upwelling that has been pulling nutrient-dense water to the surface consistently with baitfish moving in behind it. Watch for a 24-48 hour window after the northwesterly eases to make the run.

Rockfish and lingcod on deeper structure are less exposed to surface conditions and should remain fishable throughout the weather pattern, particularly for anglers launching from protected Bay-area ramps and running to nearshore pinnacles. Bottom fishing rocky structure in the 100-300 foot range has been a reliable fallback along this coast during these northwesterly windows, and the cold 51°F surface temp keeps bait concentrated at depth.

For SF Bay proper, conditions are more sheltered from open-ocean swell. The waxing gibbous moon building through this week is strengthening tidal flows through the Gate and along bay structure, which historically activates striped bass movement on dawn and dusk current peaks. Stripers in the Bay correlate more to tidal timing than to offshore wind events, so inshore anglers have an opportunity even while the ocean stays rough.

California halibut on the sandy flats are near the low end of their comfortable temperature range at 51°F. Watch for a slight inshore warming trend, even two to three degrees, to flip the flattie bite. The building moon tides over the next several days may generate enough mixing to edge Bay temperatures upward.

Context

Late May is when the Northern California salmon fishery traditionally starts to find its legs. The defining mechanism is the one playing out right now: sustained northwest winds drive upwelling that drops surface temperatures, concentrates baitfish, and pulls Chinook into feeding position in accessible depths. In normal years this upwelling cycle accelerates through June before the winds moderate and the offshore bait disperses.

What stands out about the current reports is that the improvement is tracking well relative to the start of the season. Western Outdoor News — Saltwater reporting from both Half Moon Bay and the Monterey area describes conditions as a clear upgrade from April, with cooler, greener water and better bait presence than at the official season opener. The 4-5 degree surface cooling described in those reports is consistent with a mature upwelling event rather than a brief wind pulse, which is an encouraging sign for anglers hoping the bite holds through June.

The 51°F surface reading at buoy 46026 is on the cool side for late May. Typical surface temperatures along the Bay Area coast at this time of year generally range from the low 50s to around 57-58°F depending on upwelling intensity, so the current reading reflects an active event. Chinook tend to stage and feed most reliably in the 52-58°F range; the current temperatures sit right at the lower boundary of that window, which partly explains why the bite is improving but has not fully broken open yet.

No multi-year benchmark data is available in the current feeds to quantify precisely how this season compares to historical averages. The Western Outdoor News — Saltwater accounts describe conditions as improved relative to earlier in this season and to the past month of developing conditions, but longer-trend comparisons are beyond what the available sources provide.