Korths Harbor, San Joaquin River, CA Fishing Guide

Species at Korths Harbor, San Joaquin River

• California halibut

  spring warm-up draws flatties shallow to ambush bait

  Season: Mar–Sep · Tide: moving water · Light: any light · Water: 58–66°F

• Calico bass (kelp bass)

  tide-change current pushes bait through kelp and structure

  Season: May–Oct · Tide: moving water · Light: low light · Water: 60–70°F

• California corbina

  sand-crab beds in skinny warm surf on the push

  Season: May–Sep · Tide: the incoming tide · Light: bright daylight · Water: 62–70°F

• Barred surfperch

  winter pre-spawn run; surf churns sand crabs off the bottom

  Season: Jan–Apr, Dec · Tide: moving water · Light: any light · Water: 55–64°F

• White seabass

  follows spawning squid on grunion/squid runs, low light

  Season: Mar–Jul · Tide: moving water · Light: low light · Water: 58–66°F

• Spotted bay bass

  any moving water pushes spotties onto warm shallow flats

  Season: Mar–Nov · Tide: moving water · Light: low light · Water: 62–72°F

• Barred sand bass

  summer spawning aggregations over sand, dusk current

  Season: Jun–Sep · Tide: moving water · Light: low light · Water: 64–72°F

• Spotfin croaker

  summer schools root bay/surf bottom on the push

  Season: Jun–Sep · Tide: the incoming tide · Light: low light · Water: 64–72°F

• Yellowfin croaker

  aggressive summer schools feed shallow on incoming

  Season: Jun–Sep · Tide: the incoming tide · Light: any light · Water: 64–72°F

• Leopard shark

  rides high tide into shallow flats to feed at dusk/dark

  Season: May–Oct · Tide: the incoming tide · Light: low light · Water: 58–66°F

• Bat ray

  warm-season bay feeder rooting mud on a moving tide

  Season: May–Oct · Tide: moving water · Light: low light · Water: 58–70°F

• Shovelnose guitarfish

  summer estuary push to pup over warm mud-sand flats

  Season: Jun–Oct · Tide: moving water · Light: low light · Water: 66–75°F

• California sheephead

  daytime reef feeder crushing crustaceans on tide swings

  Season: May–Oct · Tide: moving water · Light: bright daylight · Water: 60–70°F

• Pacific bonito

  warm-water blitzer chasing bait through kelp and harbors

  Season: May–Jul, Sep–Nov · Tide: moving water · Light: any light · Water: 62–72°F

What's biting at Korths Harbor, San Joaquin River, month by month

Typical seasons for this stretch of coast — a warm or late year shifts them by a few weeks. The live forecast scores today's actual conditions.

Coastal runs that pass Korths Harbor, San Joaquin River

These species travel the coast with the seasons, so they show up on a schedule rather than living here year-round.

• Yellowtail

  the clearest Pacific cascade — strong within SoCal, weak past Point Conception

  Timing: northbound Apr–Aug · Driven by: a 68–72°F surface push moving north; bait · Pace: ~2–4 wk per waypoint: SD/Coronados → Catalina → Channel Is.

• Bluefin tuna

  Pacific bluefin — moderate SoCal cascade (SD→LA→Santa Barbara), unreliable past Pt. Conception

  Timing: northbound May–Oct · Driven by: water temp (62–68°F); warm anomalies push the range north · Pace: SoCal first (Apr–May) then N along the coast

How Korths Harbor, San Joaquin River fishes

Open water lies to the west-southwest of Korths Harbor, San Joaquin River. A wind out of the west-southwest is onshore here — it stacks swell and chop into the mouth and pushes stirred-up water inshore, while an east-northeast wind flattens the surface and tends to clean it up.

Tide is the clock: moving water pulls bait through the mouth, and the turns around slack are when most of the roster feeds hardest.

Tides here are read from NOAA station 9415229 at 38.0976, -121.5684 — see it on NOAA CO-OPS.

Shops & partners near Korths Harbor, San Joaquin River

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Common questions about Korths Harbor, San Joaquin River

What fish can you catch at Korths Harbor, San Joaquin River?

California halibut, Calico bass (kelp bass), California corbina, Barred surfperch, White seabass, Spotted bay bass, Barred sand bass, Spotfin croaker, Yellowfin croaker, Leopard shark, Bat ray, Shovelnose guitarfish and 2 more. Each has its own season, preferred tide and water-temperature window at Korths Harbor, San Joaquin River.

When is the best time to fish Korths Harbor, San Joaquin River?

June and July have the most species in season (13 of 14) — California halibut, Calico bass (kelp bass), California corbina, White seabass, Spotted bay bass, Barred sand bass, Spotfin croaker, Yellowfin croaker. Seasons shift by a few weeks in a warm or late year.

What tide is best for fishing Korths Harbor, San Joaquin River?

10 of the 14 species here feed best on moving water. Moving water is what pulls bait through the mouth, so the hours either side of a tide change usually beat dead slack.

Which wind is bad for Korths Harbor, San Joaquin River?

Open water lies to the west-southwest, so a west-southwest wind is onshore — it stacks swell and chop into the mouth and pushes dirty water inshore. An east-northeast wind flattens and cleans it up.

Do migrating fish run past Korths Harbor, San Joaquin River?

Yes — Yellowtail (northbound Apr–Aug); Bluefin tuna (northbound May–Oct). These travel the coast with the seasons rather than living here year-round.

Where are the tides for Korths Harbor, San Joaquin River measured?

NOAA CO-OPS station 9415229, at 38.0976, -121.5684. What Inlet? scores the live tide, current, solunar and weather for that station.

Inlets near Korths Harbor, San Joaquin River

• Georgiana Slough entrance 2 mi
• Threemile Slough entrance 6 mi
• Steamboat Slough, Snug Harbor Marina 8 mi
• Port Chicago, Suisun Bay 26 mi
• Suisun Slough entrance 28 mi
• Pierce Harbor, Goodyear Slough 29 mi
• Oakland Harbor, Park Street Bridge 43 mi
• San Leandro Channel, San Leandro Bay 44 mi

Fishing a different inlet today? Every one has its own species roster and bite pattern.

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