Bluefin Tuna Breaking Near Half Moon Bay as NorCal Pelagic Season Opens

What's Biting

What's Next

**Bluefin Action Offshore**

With the Codfather reporting bluefin south of the Half Moon Bay weather buoy within the past week, the offshore tuna bite looks positioned to build further into June. Water temperatures of 51°F at NOAA buoy 46026 sit on the cooler end of what NorCal bluefin will tolerate at the surface, but schools have a documented pattern of pushing into this stretch when upwelling eases and surface temps begin their gradual midsummer climb. Trolling was the approach that put the Codfather crew on fish; look for bird activity and color lines near thermal breaks in the Half Moon Bay area as you work offshore.

Winds are running moderate at 4–6 m/s based on buoys 46026 and 46013, which is manageable for most offshore-capable boats in the near term. That said, afternoon northwest wind is a consistent reality on this coast — get lines in early. Conditions along the Bodega-to-Pillar-Point corridor can deteriorate quickly by midday, and a building north swell later in the week could make the Bodega Bay entrance and the area off Marin rough on subsequent mornings. Check the local marine forecast before committing to any run beyond the Gate.

**Bay and Nearshore Timing**

The Last Quarter moon this week produces reduced tidal amplitude, which can slow night fishing but sharpens daytime current windows in the Bay. For striped bass, the outgoing morning tide through the Bay mouth zone is typically the most productive window — bait gets pushed and fish stack on current seams and structure points. First light through mid-morning is the priority period.

Pacific halibut are also seasonally in the mix through the Bay in June, with slow-drift presentations over sandy flats between structure points the standard approach at this time of year. No specific source this cycle has confirmed current Bay halibut activity, but the season and water temperature are consistent with fish being present.

Near Bodega, nearshore rockfish remain a year-round target on the offshore reefs. Keep an eye on the kelp zone — the CCA California Sargassum horneri campaign (reported by Western Outdoor News — Saltwater) is a reminder that the reef structure those fish depend on is under pressure from the invasive 'Devil Weed.' Reporting unusual brown seaweed mats to the appropriate state contacts helps the broader monitoring effort.

Context

Bluefin tuna off Northern California have become a genuine seasonal fixture in recent years, particularly around the Half Moon Bay weather buoy area and the broader Gulf of the Farallones. The Codfather's recent hookup, as reported by Western Outdoor News — Saltwater, is consistent with the typical late-spring arrival window for bluefin on this coast — when Pacific upwelling winds that peak in April and May begin to moderate, allowing surface temperatures to lift and pelagics to push shoreward.

A 51°F reading at NOAA buoy 46026 is on the cool side for early June historically but well within the normal upwelling range for this stretch of coastline. Cold nutrient-rich water often precedes the best bluefin windows: upwelling concentrates baitfish, and when the wind relaxes and the surface warms even modestly, tuna move in to feed. Anglers watching for that transition — a few days of lighter northerlies and a degree or two of surface warming — are typically the ones who time the bite correctly.

No comparative season-versus-season data from NorCal Fish Reports or other regional aggregators was available in this cycle, so a precise 'early or late' read on the 2026 bluefin arrival relative to prior years is not possible to make with confidence. What is clear from Western Outdoor News — Saltwater is that the CCA California invasive kelp alert is not a minor footnote: Sargassum horneri is already spreading along the NorCal coast and poses a meaningful long-term risk to the kelp forests that anchor the nearshore rockfish, lingcod, and cabezon habitat off Bodega Bay and the Sonoma coast. Any degradation of that kelp base over the next several seasons would change the inshore fishery meaningfully.