Water Temperature of Dead Run in McLean, VA

Current Water Temperature

72.0°F

Measurement Time: Sunday, July 26, 2026, 7:15 PM EDT

Temperature Locations

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Local Points of Interest

Dead Run; Langley Oaks Park

Dead Run

Station Name: DEAD RUN AT WHANN AVENUE NEAR MCLEAN, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 226 feet

Nearest Address:
800 Whann Ave
McLean, VA 22101
Fairfax County

GPS Coordinates: 38.95977716, -77.1756743

Nearby Water Temperatures

Difficult Run, McLean, VA (3.9 mi)
Sligo Creek, Takoma Park, MD (9.4 mi)
Difficult Run, Oakton, VA (9.9 mi)
Washington Channel, Washington, DC (10.2 mi)
Paint Branch, Calverton, MD (12.4 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (13.4 mi)
Patuxent River, Brighton, MD (18.5 mi)
Potomac River, Point of Rocks, MD (29.3 mi)
Carroll Creek, Frederick, MD (34.9 mi)
Scotts Level Branch, Milford Mill, MD (35.5 mi)
Carroll Creek, Frederick, MD (35.8 mi)
Severn River, Annapolis, MD (37.5 mi)
Northwest Harbor, Baltimore, MD (38.4 mi)
Chesapeake Bay, Annapolis, MD (39.1 mi)
Herring Run, Baltimore, MD (41.5 mi)

Weather for McLean, Virginia

Current Weather

73°F
Clear
Clear
63.1°F
77°F
84%
SSW 4.7 mph
8.9 mph
73°F
67.9°F
0 in
1%
1 mi
1011 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 88°F
L: 69°F
Sunny
Tue
H: 82°F
L: 69°F
Sunny
Wed
H: 85°F
L: 67°F
Sunny
Thu
H: 80°F
L: 65°F
Sunny
Fri
H: 82°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 14.1 μg/m3
PM10: 14.7 μg/m3
Carbon Monoxide: 239 μg/m3
Nitrogen Dioxide: 27 μg/m3
Sulphur Dioxide: 1.7 μg/m3
Ozone: 44 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 20 mins
Moonrise: 7:34 PM
Moon Transit: 12:00 AM
Moonset: 3:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:01 PM - 3:31 PM

Minor Periods

7:04 PM - 8:34 PM
3:20 AM - 4:50 AM

Action Rating: 3 out of 5

Coastal Flood Advisory issued July 26 at 11:29PM EDT until July 27 at 8:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sun July 26, 2026, 11:29 PM
Expires: Mon July 27, 2026, 7:30 AM

* WHAT...Up to one and a half feet of inundation above ground level expected in low lying areas due to tidal flooding. * WHERE...Shoreline in Anne Arundel County. * WHEN...Until 8 AM EDT Monday, especially around the time of high tide. * IMPACTS...At 2.6 feet, water may begin to pond in the parking lot at Annapolis City Dock, and surround the Alex Haley Memorial. * ADDITIONAL DETAILS...Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 4:54 AM.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Monday, July 27, 2026

Weather Forecast

Sunny
88.3°F
68.7°F
77.6°F
70%
0 in
17%
0%
7.2 mph
8.3


Air Quality

AQI: 2 - Moderate
PM2.5: 22.74 μg/m3
PM10: 23.69 μg/m3
Carbon Monoxide: 190.38 μg/m3
Nitrogen Dioxide: 13.44 μg/m3
Sulphur Dioxide: 2.09 μg/m3
Ozone: 90.5 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:15 PM
Sunset: 8:25 PM
Daylight: 14 hrs 20 mins
Moonrise: 7:34 PM
Moon Transit: 12:00 AM
Moonset: 3:50 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:01 PM - 3:31 PM

Minor Periods

7:04 PM - 8:34 PM
3:20 AM - 4:50 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
81.8°F
69.1°F
73.2°F
84%
0.28 in
77%
0%
7.8 mph
4.9


Air Quality

AQI: 2 - Moderate
PM2.5: 18.39 μg/m3
PM10: 18.75 μg/m3
Carbon Monoxide: 175.42 μg/m3
Nitrogen Dioxide: 12.94 μg/m3
Sulphur Dioxide: 1.84 μg/m3
Ozone: 76.25 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:15 PM
Sunset: 8:24 PM
Daylight: 14 hrs 18 mins
Moonrise: 8:11 PM
Moon Transit: 12:10 AM
Moonset: 4:51 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:51 PM - 4:21 PM

Minor Periods

7:41 PM - 9:11 PM
4:21 AM - 5:51 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
85.1°F
67.2°F
74.9°F
68%
0 in
17%
0%
12.1 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 4.32 μg/m3
PM10: 4.34 μg/m3
Carbon Monoxide: 166.33 μg/m3
Nitrogen Dioxide: 5.97 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 87.54 μg/m3

Astronomical

Sunrise: 6:07 AM
Sun Transit: 1:15 PM
Sunset: 8:23 PM
Daylight: 14 hrs 16 mins
Moonrise: 8:41 PM
Moon Transit: 1:00 AM
Moonset: 5:54 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
2:38 PM - 5:08 PM

Minor Periods

8:11 PM - 9:41 PM
5:24 AM - 6:54 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
79.8°F
64.6°F
72.2°F
64%
0.01 in
17%
0%
10.3 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 4.23 μg/m3
PM10: 4.33 μg/m3
Carbon Monoxide: 161.24 μg/m3
Nitrogen Dioxide: 4.73 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 80.5 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 14 mins
Moonrise: 9:08 PM
Moon Transit: 1:45 AM
Moonset: 6:58 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
3:23 PM - 5:53 PM

Minor Periods

8:38 PM - 10:08 PM
6:28 AM - 7:58 AM

Action Rating: 5 out of 5

Friday, July 31, 2026

Weather Forecast

Sunny
81.7°F
64.7°F
72.9°F
70%
0.01 in
17%
0%
6.5 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.68 μg/m3
PM10: 4.78 μg/m3
Carbon Monoxide: 192.67 μg/m3
Nitrogen Dioxide: 8.81 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 55.56 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:15 PM
Sunset: 8:21 PM
Daylight: 14 hrs 12 mins
Moonrise: 9:31 PM
Moon Transit: 2:30 AM
Moonset: 8:01 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
4:07 PM - 6:37 PM

Minor Periods

9:01 PM - 10:31 PM
7:31 AM - 9:01 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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