Full moon widens tidal swings as Puget Sound eases into fall
Water at NOAA CO-OPS station 9443090 read 52°F this morning, tracking Puget Sound's steady slide toward fall temperatures. This week's full moon is driving a bigger tidal swing, with the next low expected around 7:09 a.m. and the next high near 1:14 p.m. local time — faster current exchange should hold for a few days before easing back toward average. Washington Sea Grant also flagged its SoundToxins program this week, marking 20 years of monitoring harmful algal blooms that affect shellfish safety in the Sound, worth checking before any harvest trip.
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Expect continued nearshore cooling over the next several days as this full-moon tide set works through. The stronger low-to-high swing typically sharpens current lines around points and channel edges, exactly where structure-oriented fish key up during hard exchange. Slack water around the midday high should be the calmer window for boat traffic, while the early-morning low favors bank and pier access before the turn.
As the moon wanes over the coming week, tidal ranges should relax back toward average, generally a more comfortable stretch for small-boat outings. Plan weekend trips around those two windows rather than the middle of the cycle, when current is running hardest.
Context
A 52°F reading at this station is typical for late September, in line with the normal seasonal cool-down as Puget Sound and the outer Pacific coast shift from summer into fall patterns. Full moons near the equinox reliably produce some of the year's larger tidal exchanges here, so this week's stronger currents are on schedule rather than unusual. This remains a transitional stretch for the region, with conditions shifting week to week as temperatures keep trending down into autumn.
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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