Baltimore’s next several days bring a shift from a relatively manageable Saturday to warmer, more humid conditions Sunday and a cooler, wetter pattern next week. The National Weather Service forecast also says coastal flooding could become a concern around the middle of next week as onshore winds strengthen, although the timing and local effects remain uncertain.
Saturday Offers the Clearest Dry Window
Saturday should be in the 70s to near 80 under mostly cloudy skies, with dry conditions expected through the day. Conditions are expected to remain relatively comfortable through the afternoon. Overnight, lower ceilings are possible.
Rain and Thunderstorm Chances Increase Sunday
Sunday is forecast to be mostly cloudy, warmer and more humid, with a high near 84. Showers are possible before late afternoon, followed by a slight chance of showers and thunderstorms. Southerly winds are expected, and additional showers and thunderstorms are possible Sunday night, when temperatures should fall to about 66.
No land-based watches or warnings are listed for Baltimore in the current outlook. Some Chesapeake Bay waters remain under small craft advisories, a marine condition that does not by itself indicate a comparable warning for city neighborhoods.
A Cooler, Wetter Pattern Takes Hold Next Week
Monday is expected to be cooler, with showers. Showers are forecast Tuesday, while Wednesday and Thursday stay mostly cloudy with highs in the mid-60s and additional shower chances. Persistent northeasterly winds could make conditions feel colder near the harbor and shoreline.
Flood Exposure Is Broader Than This Forecast
The Baltimore City Nuisance Flood Plan identifies six nuisance-flood zones using factors including location, topography, land use and zoning, and vulnerability indexes. Separately, the Baltimore Office of Sustainability says the city’s regulated floodplain includes areas with 1% and 0.2% annual chances of flooding, commonly called the 100-year and 500-year floodplains.
Those planning designations describe longer-term exposure rather than a prediction for the coming week.
Longer-term conditions have also changed. According to NOAA, Baltimore’s average nuisance-flood days rose from 1.3 during 1957–1963 to 13.1 during 2007–2013, a 922% increase. The city’s Nuisance Flood Plan says relative sea level in the harbor area has risen 12 inches since 1900. Neither statistic determines whether flooding will occur next week, but both help explain why onshore winds and higher water levels matter for waterfront planning.
Residents assessing exposure can consult the National Weather Service’s Eastern Region Coastal Flood Page, which identifies FEMA flood maps as the official public source for flood-hazard information and lists NOAA tools for coastal water levels and exposure. The weekend forecast remains changeable, so outdoor and waterfront plans should be checked again as Sunday and next week approach.
