Weather

Tall Timbers, MD

06/30/2026 05:00 AM

69°F

TEMPERATURE

Winds 3 mph S

Clear

Clear, with a low around 68. South wind around 3 mph.

Alerts

You have (1) alert(s). Tap to see details.

Extreme Heat Watch

Severe

Extreme Heat Watch issued June 30 at 3:03AM EDT until July 3 at 8:00PM EDT by NWS Baltimore MD/Washington DC
NWS Baltimore MD/Washington DC
Category	Certainty	Severity
Met	Likely	Severe
Status	Urgency	Category
Actual	Future	Met
Effective	Ends	Expires
06/30/2026 03:03 AM	07/03/2026 08:00 PM	06/30/2026 11:15 AM
* WHAT...Dangerously hot conditions with heat index values up to 115 possible. * WHERE...Calvert and St. Marys Counties. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Moonrise

10:29 PM

Moonset

06:58 AM

Sunrise

05:45 AM

Moon Phase

Waning gibbous

Sunset

08:33 PM

Hourly Forecast

Tue, 05:00 AM

Clear
Winds: 3 mph S

69°

Tue, 06:00 AM

Sunny
Winds: 2 mph S

68°

Tue, 07:00 AM

Sunny
Winds: 2 mph S

70°

Tue, 08:00 AM

Sunny
Winds: 1 mph S

71°

Tue, 09:00 AM

Sunny
Winds: 2 mph S

72°

Tue, 10:00 AM

Sunny
Winds: 5 mph S

74°

Tue, 11:00 AM

Sunny
Winds: 8 mph SE

75°

Tue, 12:00 PM

Sunny
Winds: 8 mph SE

76°

Tue, 01:00 PM

Sunny
Winds: 9 mph SE

77°

Tue, 02:00 PM

Sunny
Winds: 12 mph SE

77°

Tue, 03:00 PM

Sunny
Winds: 13 mph SE

79°

Tue, 04:00 PM

Sunny
Winds: 13 mph SE

80°

Tue, 05:00 PM

Sunny
Winds: 14 mph SE

80°

Tue, 06:00 PM

Mostly Clear
Winds: 15 mph SE

Mostly Clear
Winds: 10 mph S

74°

Overnight

Clear

68°

Winds: 3 mph S

Clear, with a low around 68. South wind around 3 mph.

Tuesday

Sunny

81°

Winds: 1 to 14 mph S

Sunny, with a high near 81. South wind 1 to 14 mph, with gusts as high as 20 mph.

Tuesday Night

Mostly Clear

73°

Winds: 10 to 15 mph S

Mostly clear, with a low around 73. South wind 10 to 15 mph, with gusts as high as 21 mph.

Wednesday

Sunny

86°

Winds: 7 to 12 mph S

Sunny, with a high near 86. South wind 7 to 12 mph.

Wednesday Night

Clear

76°

Winds: 7 to 12 mph S

Clear, with a low around 76. South wind 7 to 12 mph.

Thursday

Sunny

90°

Winds: 5 to 8 mph S

Sunny, with a high near 90.

Thursday Night

Mostly Clear

79°

Winds: 7 to 10 mph S

Mostly clear, with a low around 79.

Friday

Sunny

91°

Winds: 3 to 7 mph SW

Sunny, with a high near 91.

Friday Night

Mostly Clear

79°

Winds: 3 to 8 mph SW

Mostly clear, with a low around 79.

Independence Day

Mostly Sunny then Slight Chance Showers And Thunderstorms

94°

Winds: 2 to 8 mph S

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 20%.

Saturday Night

Chance Showers And Thunderstorms

78°

Winds: 3 to 8 mph SW

A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 78. Chance of precipitation is 30%.

Sunday

Mostly Sunny then Chance Showers And Thunderstorms

90°

Winds: 2 to 6 mph S

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

Sunday Night

Chance Showers And Thunderstorms

77°

Winds: 6 mph S

A chance of showers and thunderstorms. Mostly cloudy, with a low around 77. Chance of precipitation is 50%.

Monday

Slight Chance Rain Showers then Chance Showers And Thunderstorms

88°

Winds: 3 to 8 mph SW

A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 88.

Coastal Waters Forecast

National Weather Service Baltimore MD/Washington DC

FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY.

Tidal Potomac River and Maryland portion of Chesapeake Bay. Forecasts of wave heights do not include effects of wind direction relative to tidal currents. Expect higher waves when winds are blowing against the tidal flow. Waves flat where waters are iced over. An area of high pressure will build near and south of the Mid- Atlantic through the week. A pop up shower or thunderstorm can't totally be ruled out near any bay or river breezes each afternoon, though most of the time should be dry until Friday when the high pressure begins to shift. The chance of strong thunderstorms will increase Friday into the weekend. Southerly channeling may require the issuance of Small Craft Advisories at times through Wednesday.