Northern California saltwater settles into its fall cooldown
NOAA CO-OPS station 9416841 is reading 56.8°F this week, marking the fall cooldown now settling into Northern California's coastal waters. The moon sits in a waning crescent, trending toward new moon and the bigger tidal swings that phase typically brings to SF Bay and Bodega.
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Expect the cooling trend to continue over the next few days as the region moves deeper into its autumn pattern, with surface readings likely drifting another degree or two lower by the weekend. The approach to new moon brings stronger tidal exchange, so plan trips around the bigger swings for spots that fish better with more current movement. Early morning and late-afternoon windows, when temperatures hold most stable, remain the better bet as daylight keeps shortening through mid-October.
Context
This fits the typical seasonal rhythm for Northern California saltwater: temperatures ease steadily from late-summer highs through October and into November as the region transitions toward winter patterns. SF Bay and Bodega waters at this time of year sit in a shoulder-season phase, with conditions shifting week to week rather than holding steady, which makes a current reading like this one worth checking close to your trip date rather than leaning on seasonal averages alone.
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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