Weather

Tall Timbers, MD

07/18/2026 05:00 AM

77°F

TEMPERATURE

Winds 6 mph S

Smoke

Smoke. Mostly cloudy, with a low around 77. South wind around 6 mph.

Alerts

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

Heat Advisory

Moderate

Heat Advisory issued July 18 at 2:16AM 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 02:16 AM	07/18/2026 07:00 PM	07/18/2026 10:30 AM
* 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

05:56 AM

Moon Phase

Waxing crescent

Sunset

08:27 PM

Hourly Forecast

Sat, 05:00 AM

Smoke
Winds: 6 mph S

77°

Sat, 06:00 AM

Smoke
Winds: 7 mph S

77°

Sat, 07:00 AM

Smoke
Winds: 7 mph S

79°

Sat, 08:00 AM

Areas Of Smoke
Winds: 8 mph S

80°

Sat, 09:00 AM

Areas Of Smoke
Winds: 8 mph S

82°

Sat, 10:00 AM

Patchy Smoke
Winds: 8 mph S

84°

Sat, 11:00 AM

Patchy Smoke
Winds: 9 mph S

86°

Sat, 12:00 PM

Patchy Smoke
Winds: 10 mph S

88°

Sat, 01:00 PM

Partly Sunny
Winds: 12 mph S

89°

Sat, 02:00 PM

Isolated Showers And Thunderstorms
Winds: 14 mph S

90°

Sat, 03:00 PM

Isolated Showers And Thunderstorms
Winds: 14 mph SW

90°

Sat, 04:00 PM

Scattered Showers And Thunderstorms
Winds: 16 mph SW

90°

Sat, 05:00 PM

Chance Showers And Thunderstorms
Winds: 16 mph SW

89°

Sat, 06:00 PM

Scattered Showers And Thunderstorms
Winds: 15 mph SW

88°

Sat, 07:00 PM

Scattered Showers And Thunderstorms
Winds: 15 mph SW

87°

Sat, 08:00 PM

Scattered Showers And Thunderstorms
Winds: 14 mph SW

85°

Sat, 09:00 PM

Scattered Showers And Thunderstorms
Winds: 13 mph SW

84°

Sat, 10:00 PM

Scattered Showers And Thunderstorms
Winds: 12 mph SW

84°

Sat, 11:00 PM

Scattered Showers And Thunderstorms
Winds: 12 mph SW

83°

Sun, 12:00 AM

Scattered Showers And Thunderstorms
Winds: 10 mph SW

82°

Sun, 01:00 AM

Isolated Showers And Thunderstorms
Winds: 10 mph W

82°

Sun, 02:00 AM

Partly Cloudy
Winds: 10 mph SW

81°

Sun, 03:00 AM

Partly Cloudy
Winds: 9 mph W

81°

Sun, 04:00 AM

Partly Cloudy
Winds: 8 mph W

81°

Overnight

Smoke

77°

Winds: 6 mph S

Smoke. Mostly cloudy, with a low around 77. South wind around 6 mph.

Saturday

Smoke then Scattered Showers And Thunderstorms

90°

Winds: 7 to 16 mph S

Smoke before 1pm, then scattered showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 90. Heat index values as high as 102. South wind 7 to 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.

Saturday Night

Scattered Showers And Thunderstorms

79°

Winds: 8 to 15 mph SW

Scattered showers and thunderstorms before 2am. Some of the storms could be severe. Mostly cloudy, with a low around 79. Southwest wind 8 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

84°

Winds: 8 mph NW

Mostly sunny, with a high near 84. Northwest wind around 8 mph.

Sunday Night

Mostly Clear

75°

Winds: 5 to 8 mph NE

Mostly clear, with a low around 75. Northeast wind 5 to 8 mph.

Monday

Mostly Sunny then Chance Showers And Thunderstorms

82°

Winds: 6 to 10 mph E

A chance of rain showers between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

Monday Night

Chance Showers And Thunderstorms

75°

Winds: 6 to 12 mph SE

A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 50%.

Tuesday

Chance Showers And Thunderstorms

85°

Winds: 6 to 16 mph S

A chance of showers and thunderstorms before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

Tuesday Night

Showers And Thunderstorms Likely

76°

Winds: 16 mph SW

Showers and thunderstorms likely. Mostly cloudy, with a low around 76. Chance of precipitation is 70%.

Wednesday

Showers And Thunderstorms Likely

85°

Winds: 14 mph SW

Showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

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 60%.

Thursday

Slight Chance Rain Showers

80°

Winds: 9 mph N

A slight chance of rain showers. Mostly sunny, with a high near 80. Chance of precipitation is 20%.

Thursday Night

Slight Chance Rain Showers

71°

Winds: 6 mph N

A slight chance of rain showers. Mostly clear, with a low around 71. Chance of precipitation is 20%.

Friday

Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms

82°

Winds: 6 mph NE

A slight chance of rain showers before 8am, then a slight chance of showers and thunderstorms. Sunny, with a high near 82.

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 warm front will lift north of the area this morning. 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 this afternoon and evening.