Early Bluefin Sightings Signal Season Start as June Swells Build Offshore

What's Biting

What's Next

The immediate story is sea state. NOAA buoy 46026 recorded 10.2-foot swells through early Sunday morning, and winds are running 13–14 m/s at stations spanning the region. Offshore runs are effectively on hold for most small-boat anglers until conditions moderate. Watch for a break in the northwest swell — when the period lengthens and wave heights drop below 5 feet, those will be the go windows for pursuing bluefin offshore.

When it does lay down, the early-season bluefin bite is the target. Per Western Outdoor News — Saltwater, the Codfather crew found fish south of the Half Moon Bay weather buoy by committing to a trolling search — after working the area for a few hours, they connected. That patient, search-oriented trolling approach is the playbook: run spreads along temperature breaks and current edges in the 54–58°F zone currently marked by buoys 46042 and 46028. Look for bait marks on the sounder and surface-breezing fish; the June upwelling concentrates forage along thermal edges, and that is where the tuna will hold.

Inshore, the swell will push turbid water toward kelp beds through at least early in the week. Once conditions flush, nearshore rockfish structure fishing and halibut drifting in bays and protected anchorages should bounce back. The Last Quarter moon on June 7 delivers moderate tidal movement — enough to push bait around structure at dawn and dusk without the extreme swings of a new or full moon. Early morning windows on an outgoing tide are worth targeting for halibut on slow drifts with live anchovies.

The longer-range headline is the El Niño-influenced warm water incursion that Western Outdoor News flagged for Southern California charter captains planning summer offshore runs. If that warm water trends north — we're currently a few degrees short nearshore — expect yellowtail to push up the coast and tuna windows to expand closer to the beach through July and August. Check current sea surface temperature charts before making the call on longer offshore runs.

Context

Early June on the California Central Coast typically marks the hinge point between spring upwelling and the early summer pelagic season. Sea surface temps in the 51–58°F range, as currently recorded across NOAA buoys 46026, 46042, and 46028, are characteristic of this period: cold upwelling suppresses nearshore temperatures even as offshore waters begin to warm toward summer levels. In most years, the first bluefin tuna of the season appear within striking distance of Monterey and the Bay Area sometime between late May and early July, so the Half Moon Bay sightings covered by Western Outdoor News — Saltwater are squarely within the expected seasonal window — neither unusually early nor late.

The 10.2-foot swell logged at buoy 46026 reflects the persistent northwest swell pattern that defines Central Coast conditions through spring and early summer. These rough stretches are routine for the season and typically cycle through before moderating mid-week, then building again heading into the following weekend. Anglers who target offshore trips on mid-week windows often find better conditions than weekend warriors.

What makes this season worth watching closely is the El Niño framing highlighted by Western Outdoor News for Southern California charter operators. In past El Niño years, warm water pushes further north along the coast, which has historically extended the productive yellowtail and dorado zone from Southern California waters up toward Point Conception and Monterey. Current surface temps are on the cooler end for that scenario, but the trajectory through July and August could meaningfully change the species mix available to Central Coast anglers. No direct reports from Central Coast captains, tackle shops, or state agencies are available in this reporting cycle, so the inshore picture for halibut and rockfish is based on seasonal norms rather than firsthand intel.