NorCal coast settles into fall cool-down as new moon tides build
Water temperatures along this stretch of coast are holding in the mid-50s as the fall cooldown settles in. Our station near Bodega is reading 56.5°F, while the station near Humboldt Bay sits cooler at 53.4°F, both from early morning October 9 readings. That north-south split is typical for this time of year as the ocean sheds summer warmth from the south up. With tonight's New Moon, tidal exchanges are building toward their strongest pull of the cycle, moving more water and bait through the bay systems on each swing.
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Expect the tidal push to keep building over the next two to three days as the New Moon strengthens the exchange, bringing faster currents on both the incoming and outgoing tide. Bigger swings generally flush more bait through channel mouths and around structure, worth planning a trip around rather than fishing dead water on a weaker tide day. Water temps should continue a gradual slide through the 50s as days shorten, a trend that typically holds through the rest of October along this coast.
Weekend anglers will want to target the two to three hours around the peak of the exchange, whichever tide stage lines up with daylight, since current speed matters more than time of day once temperatures are this uniform top to bottom.
Context
This is standard fall-transition timing for the SF Bay and Bodega stretch: ocean temperatures ease down from summer peaks through October and November as the upwelling season winds down and days shorten. Nothing in this week's readings looks early or late relative to that pattern. The region is squarely in its autumn shoulder season, when conditions shift week to week rather than holding steady, making tide timing a bigger factor in trip planning than it is in high summer.
Synthesized from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Check local regulations before keeping fish. Never trust a single source for a trip decision.
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