Memorial Day in Philadelphia is starting out more splash than sunshine. By 5:35 a.m. EDT on Monday, May 25, 2026, observations at Philadelphia International Airport showed light rain with patchy fog and temperatures near 59°F. Dense pockets of fog are cutting visibility on some roads through midmorning, and scattered showers with a few thunderstorms possible are expected at times today. Afternoon highs should still climb into the low to mid 70s.
Fog And The Morning Commute
According to the National Weather Service Mount Holly, a Dense Fog Advisory covers parts of eastern Pennsylvania this morning, and a Marine Dense Fog Advisory is in place for offshore waters, with visibility dropping to a mile or less in spots. Forecasters expect patchy fog and drizzle to linger through midmorning before a warm front stalls over the region and a cold front moves in later today. Showers and thunderstorms are most likely this morning and again late today, with many locations topping out near 74°F and locally heavy downpours possible in the stronger storms.
Beach And Boating Safety
A Rip Current Statement remains in effect through 8 p.m. Monday for the Jersey Shore and Delaware Beaches, with breaking waves of 2 to 4 feet and south southwest winds of 10 to 15 mph creating dangerous currents, according to the NWS beach forecast. The same guidance highlights a Small Craft Advisory on ocean waters through 6 p.m., so boaters are urged to stick to sheltered harbors and beachgoers are advised to follow lifeguard instructions and posted warnings. If you are heading to the shore, choose beaches with lifeguards on duty and be ready to stay out of the water when alerts are in place.
Timing And The Week Ahead
The cold front is expected to push offshore tonight, reducing precipitation chances overnight and allowing patchy fog to redevelop in low lying areas, with lows settling in the low 60s. Tuesday and Wednesday trend drier and warmer, with highs climbing into the low 80s by midweek and more settled weather anticipated by Thursday and Friday. Forecasters note that a few coastal showers are possible Tuesday, but the bulk of the unsettled weather is focused on Monday.
Quick Tips
If you are driving in this morning’s fog, slow down, use low beam headlights, and budget extra time for the commute. For outdoor plans, keep a backup plan for rain and check beach conditions before you head out, since rip currents can form quickly and are life threatening for swimmers. For the latest watches, warnings, and beach details, check in with the National Weather Service Mount Holly and the NWS beach forecast before you go.
