PHILADELPHIA, PA – A soggy Columbus Day weekend is ahead as coastal flooding and gusty winds push into the Delaware Valley starting Sunday. Up to a foot of tidal inundation may flood low-lying roads and parking lots near the Delaware River, including portions of I-95 and local waterfront areas.
According to the National Weather Service in Mount Holly, a Coastal Flood Advisory will be in effect from 2 p.m. Sunday through 11 p.m. Monday, covering Philadelphia, Camden, Gloucester, and lower Bucks Counties, along with nearby New Jersey shorelines. The agency warns that the most flood-prone roads along tidal waterways could close during high tides late Sunday and again on Monday afternoon.
Rain begins Sunday morning, turning heavier by afternoon as northeast winds strengthen to 20–30 mph, with gusts up to 35 mph. These winds will funnel Atlantic moisture inland, raising water levels along the Delaware River and its tributaries. Commuters should plan for slower travel, avoid driving through standing water, and park vehicles away from flood-prone zones.
By Columbus Day, lingering rain and breezes keep conditions damp and cool. Temperatures will hover near the upper 50s, adding a raw edge to outdoor holiday plans. Skies will gradually clear by Tuesday as drier, cooler fall air sweeps in—perfect timing for pumpkin patches and leaf-viewing later in the week.
Five-Day Forecast for Philadelphia, PA:
Sat: 68/59 – Cloudy, scattered showers; breezy east wind.
Sun: 61/57 – Rain develops; gusts to 35 mph; flood risk near Delaware River.
Mon: 61/54 – Showers taper; coastal flooding possible mid-day.
Tue: 66/53 – Partly sunny; breezy; improving.
Wed: 69/48 – Sunny and pleasant; ideal for fall outdoor plans.
