Seattle, WA Weather This Week: Coastal Flooding Today, Cooler and Wet Pattern Into Monday

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Washington – Cold air hangs over the waterfront as tidewater creeps higher than usual, pushing quietly into low spots before sunrise. Puddles spread near shorelines, and seawater laps closer to parking lots and parks, signaling a developing Weather Alert for parts of the central Puget Sound.

According to the National Weather Service in Seattle, a Coastal Flood Advisory remains in effect for the city of Seattle and lowlands of Pierce and southern King counties through early afternoon. Minor coastal flooding is expected during the morning high tide, with water levels running about 2 to 2.5 feet above ground in the most vulnerable shoreline areas. The flooding is driven by tidal overflow rather than rainfall.

Impacts remain localized but noticeable. Low-lying roads near the waterfront, coastal parks, and parking areas may briefly flood, though widespread closures are not expected. Drivers should allow extra time if traveling near Elliott Bay, Alki, or other shoreline routes. Do not drive through water of unknown depth, especially during peak tide hours.

Temperatures stay firmly in winter mode, hovering near 40 degrees this morning and reaching the mid-40s later today. Light showers linger on and off, adding slick pavement to already damp conditions. To be fair, rain is not the main issue, but it does add to travel frustration during post-Christmas returns.

Looking ahead, coastal flooding concerns ease later today as tides lower. The broader pattern stays unsettled through the weekend, with scattered showers, cool afternoons, and overnight lows dipping into the mid-30s. Patchy frost remains possible away from the water during clearer breaks.

By Sunday and into Monday, conditions remain cool and damp, though no additional coastal flooding is expected at this time. Meteorologists continue monitoring tide cycles and incoming systems as the last full week of December unfolds.

For now, plan shoreline travel carefully, protect flood-prone property, and stay alert through the morning high tide while the Coastal Flood Advisory remains in effect.