Weather Alert
St. Mary's River State Park Weather Warning NWS WEATHER ALERT FOR THE SAINT MARYS RIVER STATE PARK, MD AREA - Issued: 650 AM EDT Thu Aug 20 2026 St. Mary's River State Park Weather Warning

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St. Mary's River State Park, MD Weather Forecast

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St. Mary's River State Park, MD Weather Forecast

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St. Mary's River State Park MD weather - Partly Cloudy - 91°F
Partly Cloudy
91°F
Updated 1:48 pm
Feels Like 94°F
Humidity 62%
Wind SSW 12 mph
Barometer  29.94 in
Dew Point 76°F
St. Mary's River State Park MD weather - Partly Cloudy - 33°C
Partly Cloudy
33°C
Updated 1:48 pm
Feels Like 35°C
Humidity 62%
Wind SSW 19 km/h
Barometer  101.4 kPa
Dew Point 24°C
WX Settings

St. Mary's River State Park Weather Forecast

REST OF TODAY TONIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT
St. Mary's River State Park, MD Weather - Rest Of Today Chance Of T-Storm St. Mary's River State Park, MD Weather - Tonight Chance Of T-Storm St. Mary's River State Park, MD Weather - Friday Chance Of T-Storm St. Mary's River State Park, MD Weather - Friday Night Chance Of T-Storm St. Mary's River State Park, MD Weather - Saturday Chance Of T-Storm St. Mary's River State Park, MD Weather - Saturday Night Chance Of Showers St. Mary's River State Park, MD Weather - Sunday Chance Of Showers St. Mary's River State Park, MD Weather - Sunday Night Partly Cloudy St. Mary's River State Park, MD Weather - Monday Sunny St. Mary's River State Park, MD Weather - Monday Night Mostly Clear St. Mary's River State Park, MD Weather - Tuesday Sunny St. Mary's River State Park, MD Weather - Tuesday Night Partly Cloudy
Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of T-Storm Chance of Showers Chance of Showers Partly Cloudy Sunny Mostly Clear Sunny Partly Cloudy
Hi: 89°FHi: 32°C
 Lo: 69°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 69°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 70°FLo: 21°C Hi: 85°FHi: 29°C
 Lo: 69°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 65°FLo: 18°C Hi: 81°FHi: 27°C
 Lo: 69°FLo: 21°C
POP: 90% POP: 70% POP: 30% POP: 90% POP: 90% POP: 40% POP: 40%
POP = Probability of Precipitation.
Weather Outlook Updated: 1056 AM EDT Thu Aug 20 2026 St. Mary's River State Park, MD Weather - WeatherWorld.com

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St. Mary's River State Park Forecast Discussion

Issued: 1038 AM EDT Thu Aug 20 2026

Key Messages

  • 1) Severe weather is possible, mainly east of the Blue Ridge this afternoon into early evening.
  • 2) After a brief lull Friday, additional showers and a few thunderstorms are possible Friday night into Saturday.
  • 3) Lingering chance for showers and thunderstorms on Sunday.
  • 4) Drier and less humid conditions to start next week.

Discussion

... KEY MESSAGE 1...Severe weather is possible, mainly east of the Blue Ridge this afternoon into early evening.

A slow-movi...