Delta running high as stripers and bass seek calmer back-channel water

What's Biting

What's Next

With the Sacramento River running at 77,800 cfs as of June 16 (per USGS gauge 11455420), expect turbid main channels to persist through the near term unless upstream releases ease or the snowmelt pulse subsides. Flow at this level typically keeps the main Sacramento and San Joaquin channels murky and fast — not ideal for open-water fishing — but it concentrates fish in predictable, structure-adjacent spots in the back Delta.

For striped bass, the quieter tidal sloughs and side channels away from the main river corridor are where fish tend to hold during high-flow pushes. Current seams at the mouths of side channels can be productive at first light. Swimbaits and large paddletails on a slow sink-and-retrieve are the go-to for triggering stripers along the edges of fast and slow water. Topwater window is slim at these flows; focus on the first 30–45 minutes of morning light before the sun angles up.

Largemouth bass in the tule-lined back sloughs are less affected by main-channel conditions — water there tends to run cleaner and calmer. Flipping and pitching toward tule mats and submerged wood remains the classic summer play. Weedless soft plastics punched through dense tule cover can draw strikes from bass that have pulled tight to shade as June temperatures rise. The Waxing Crescent moon this week provides modest tidal push in the lower Delta, but the moon is building toward first quarter; tidal influence should strengthen through the weekend, potentially opening additional dawn and dusk feeding windows on the incoming tide even at elevated river flows.

Channel catfish are a reliable option in sheltered backwaters right now. Cut bait or shrimp bottom-fished in calmer side pockets typically produces through the summer. As the season moves past peak spawn activity for catfish, fish that were locked into spawning tend to shift back to active feeding — standard late-spring behavior suggesting the bite should be building in the calmer Delta sloughs.

Check the local forecast before heading out. Wind across the open Delta channels can build quickly, and high flows increase floating debris hazards for smaller craft.

Context

For the California Delta, mid-June typically marks the beginning of the summer fishing pattern: water temperatures rising into the upper 60s to low 70s°F, striped bass recovering post-spawn and beginning their push back toward the Delta and San Francisco Bay, and largemouth bass settling into summer structure after the spawn transition. Sacramento River flows have historically moderated significantly from their spring snowmelt peak by mid-June, often dropping toward the 15,000–35,000 cfs range in average water years before summer dam releases take over as the primary flow driver.

A reading of 77,800 cfs on June 16 (USGS gauge 11455420) is substantially elevated by that historical benchmark — consistent with an above-average Sierra Nevada snowpack year. In high-snowpack years, the Delta can remain high, fast, and turbid well into July, which delays the water-clarity improvements that summer fishing depends on. Baitfish distributions shift with the current, and striped bass returning from upstream spawning grounds may hold in different channel positions than in a typical or dry year, making local knowledge of back-channel structure more valuable than usual.

NorCal Fish Reports covers the Delta weekly but did not return specific season-comparison data in this reporting cycle, so direct year-over-year context is not available from our feeds. That said, above-normal June flows are not unprecedented on the Sacramento system, and the Delta's back sloughs and tidal channels historically settle out faster than the main river — that is historically where the fishery stays productive while the main corridor runs big and off-color. As flows moderate through summer, expect improving conditions across the system: cleaner water, more concentrated bait schools, and more predictable striper and largemouth behavior. The timeline for that transition depends on upstream reservoir releases and the pace of remaining snowmelt.