Delta fall bite builds as water cools into mid-October

What's next

Expect the cooling trend to continue, and with it more shallow feeding. In the next few days, the best windows are likely early morning and the last hour of light, when cooler water and lower light push bass toward edges and remaining green cover. Tactical Bassin's guidance on overlooked shallow water, fished without electronics, suits that pattern: work banks and weed edges with a jig or soft jerkbait, and keep a topwater tied on for calm mornings.

When fish turn tough, the same source points to finesse presentations, including small topwaters, swimbaits and creature baits. Fishing the Midwest's bottom-bouncer plain rig is a walleye technique from northern waters, so only consider it if you are targeting walleye. The waxing crescent moon gives a dark-ish evening sky early in the week and will set earlier each night, so dawn is the more reliable window than late night.

High flow at the San Joaquin-side gauge means current will shape where fish hold. Look for slack pockets behind structure and along banks out of the main push, and check the gauges again before you launch.

Context

Mid-October is typically a transition period on Central Valley waters. Summer heat has faded, water temperatures are dropping out of the 70s, and fish that spent the warm months deeper or tucked into heavy cover tend to start roaming shallower to feed. Flows are often moderated by this point in the year, so the strong readings at both gauges are worth noting when planning where to fish.

This is generally an on-schedule fall pattern rather than an early or late one. Check current California regulations before keeping fish.