Weather

Tall Timbers, MD

07/18/2026 05:00 PM

88°F

TEMPERATURE

Winds 16 mph SW

Chance Showers And Thunderstorms

A chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a high near 90. Southwest wind around 16 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

Alerts

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

Heat Advisory

Moderate

Heat Advisory issued July 18 at 7:50AM EDT until July 18 at 7:00PM EDT by NWS Baltimore MD/Washington DC
NWS Baltimore MD/Washington DC
Category	Certainty	Severity
Met	Likely	Moderate
Status	Urgency	Category
Actual	Expected	Met
Effective	Ends	Expires
07/18/2026 07:50 AM	07/18/2026 07:00 PM	07/18/2026 07:00 PM
* WHAT...Heat index values around 105 expected. * WHERE...Washington DC, and portions of central, northern, and southern Maryland, and central and northern Virginia. * WHEN...From 11 AM this morning to 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Moonrise

11:44 AM

Moonset

12:03 AM

Sunrise

05:57 AM

Moon Phase

Waxing crescent

Sunset

08:27 PM

Hourly Forecast

Sat, 05:00 PM

Chance Showers And Thunderstorms
Winds: 16 mph SW

88°

Sat, 06:00 PM

Scattered Showers And Thunderstorms
Winds: 15 mph SW

87°

Sat, 07:00 PM

Scattered Showers And Thunderstorms
Winds: 15 mph SW

85°

Sat, 08:00 PM

Chance Showers And Thunderstorms
Winds: 12 mph S

84°

Sat, 09:00 PM

Chance Showers And Thunderstorms
Winds: 12 mph SW

84°

Sat, 10:00 PM

Chance Showers And Thunderstorms
Winds: 12 mph SW

83°

Sat, 11:00 PM

Chance Showers And Thunderstorms
Winds: 12 mph SW

83°

Sun, 12:00 AM

Chance Showers And Thunderstorms
Winds: 12 mph SW

82°

Sun, 01:00 AM

Mostly Cloudy
Winds: 12 mph SW

82°

Sun, 02:00 AM

Mostly Cloudy
Winds: 10 mph W

82°

Sun, 03:00 AM

Mostly Cloudy
Winds: 10 mph SW

81°

Sun, 04:00 AM

Mostly Cloudy
Winds: 9 mph W

81°

Sun, 05:00 AM

Mostly Cloudy
Winds: 9 mph W

81°

Sun, 06:00 AM

Partly Sunny
Winds: 8 mph W

80°

Sun, 07:00 AM

Partly Sunny
Winds: 8 mph W

80°

Sun, 08:00 AM

Mostly Sunny
Winds: 8 mph W

79°

Sun, 09:00 AM

Mostly Sunny
Winds: 8 mph NW

78°

Sun, 10:00 AM

Mostly Sunny
Winds: 8 mph NW

80°

Sun, 11:00 AM

Mostly Sunny
Winds: 8 mph NW

79°

Sun, 12:00 PM

Mostly Sunny
Winds: 8 mph NW

79°

Sun, 01:00 PM

Mostly Sunny
Winds: 8 mph NW

80°

Sun, 02:00 PM

Slight Chance Showers And Thunderstorms
Winds: 9 mph NW

80°

Sun, 03:00 PM

Mostly Sunny
Winds: 8 mph NW

81°

Sun, 04:00 PM

Sunny
Winds: 8 mph N

81°

This Afternoon

Chance Showers And Thunderstorms

90°

Winds: 16 mph SW

Tonight

Chance Showers And Thunderstorms

78°

Winds: 9 to 15 mph SW

A chance of showers and thunderstorms before 11pm, then a chance of showers and thunderstorms between 11pm and 1am. Some of the storms could be severe. Mostly cloudy, with a low around 78. Southwest wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

Sunday

Mostly Sunny then Slight Chance Showers And Thunderstorms

83°

Winds: 9 mph NW

A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 83. Northwest wind around 9 mph. Chance of precipitation is 20%.

Sunday Night

Slight Chance Showers And Thunderstorms then Mostly Clear

75°

Winds: 5 to 8 mph NE

A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 75. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.

Monday

Mostly Sunny then Slight Chance Rain Showers

81°

Winds: 6 to 10 mph E

A slight chance of rain showers after 2pm. Mostly sunny, with a high near 81. East wind 6 to 10 mph. Chance of precipitation is 20%.

Monday Night

Showers And Thunderstorms Likely

75°

Winds: 7 to 12 mph SE

A slight chance of rain showers before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 75. Chance of precipitation is 60%.

Tuesday

Showers And Thunderstorms

84°

Winds: 7 to 16 mph S

Showers and thunderstorms. Mostly cloudy, with a high near 84. Chance of precipitation is 80%.

Tuesday Night

Showers And Thunderstorms

76°

Winds: 17 mph SW

Showers and thunderstorms. Mostly cloudy, with a low around 76. Chance of precipitation is 80%.

Wednesday

Showers And Thunderstorms Likely

84°

Winds: 12 to 16 mph SW

Rain showers likely before 8am, then showers and thunderstorms likely. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.

Wednesday Night

Showers And Thunderstorms Likely

70°

Winds: 10 mph NW

Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 70%.

Thursday

Slight Chance Rain Showers

78°

Winds: 10 mph N

A slight chance of rain showers. Mostly sunny, with a high near 78. Chance of precipitation is 20%.

Thursday Night

Slight Chance Rain Showers

71°

Winds: 7 mph N

A slight chance of rain showers before 2am. Partly cloudy, with a low around 71. Chance of precipitation is 20%.

Friday

Sunny

81°

Winds: 7 mph NE

Sunny, with a high near 81.

Friday Night

Partly Cloudy

72°

Winds: 3 to 7 mph SE

Partly cloudy, with a low around 72.

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. A strong cold front will drop through the region tonight into Sunday. High pressure will build north of the area Monday before the next cold front approaches by midweek. Small Craft Advisories may be needed for portions of the waters Sunday, and again Monday night through Wednesday. Special Marine Warnings will likely be needed through this evening.