Water Temperature of Difficult Run in Oakton, VA

Current Water Temperature

74.3°F

Measurement Time: Friday, July 31, 2026, 3:15 PM EDT

Temperature Locations

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Local Points of Interest

Fairfax, VA

Difficult Run

Station Name: DIFFICULT RUN ABOVE FOX LAKE NEAR FAIRFAX, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 328 feet

Nearest Address:
11200 Lapham Dr
Oakton, VA 22124
Fairfax County

GPS Coordinates: 38.88469518, -77.3324293

Nearby Water Temperatures

Difficult Run, McLean, VA (7.8 mi)
Dead Run, McLean, VA (9.9 mi)
Washington Channel, Washington, DC (16.7 mi)
Sligo Creek, Takoma Park, MD (19 mi)
Paint Branch, Calverton, MD (22.3 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (22.5 mi)
Patuxent River, Brighton, MD (27.6 mi)
Potomac River, Point of Rocks, MD (29.1 mi)
Carroll Creek, Frederick, MD (37.7 mi)
Spout Run, Boyce, VA (38.2 mi)
Carroll Creek, Frederick, MD (38.5 mi)
Upper Machedoc Creek, Dahlgren, VA (42.2 mi)
Scotts Level Branch, Milford Mill, MD (45 mi)
Severn River, Annapolis, MD (46.4 mi)
Chesapeake Bay, Annapolis, MD (47.8 mi)

Weather for Oakton, Virginia

Current Weather

85.5°F
Sunny
Sunny
84.6°F
82°F
40%
SE 2.2 mph
3.8 mph
83.1°F
52.8°F
0 in
0%
10 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 90°F
L: 68°F
Sunny
Sat
H: 89°F
L: 67°F
Partly Cloudy
Sun
H: 77°F
L: 71°F
Fog
Mon
H: 73°F
L: 69°F
Fog
Tue
H: 83°F
L: 68°F

Air Quality

AQI: 1 - Good
PM2.5: 10.3 μg/m3
PM10: 10.4 μg/m3
Carbon Monoxide: 171 μg/m3
Nitrogen Dioxide: 10.1 μg/m3
Sulphur Dioxide: 4.3 μg/m3
Ozone: 112 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 12 mins
Moonrise: 9:32 PM
Moon Transit: 2:30 AM
Moonset: 8:02 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

9:02 PM - 10:32 PM
7:32 AM - 9:02 AM

Action Rating: 3 out of 5

Small Craft Advisory issued July 31 at 1:48PM EDT until August 1 at 11:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 31, 2026, 1:48 PM
Expires: Fri July 31, 2026, 10:00 PM

* WHAT...South winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN...From 2 PM to 11 PM EDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Friday, July 31, 2026

Weather Forecast

Sunny
89.8°F
67.6°F
78.8°F
55%
0 in
3%
0%
6.3 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 8.29 μg/m3
PM10: 8.4 μg/m3
Carbon Monoxide: 147.5 μg/m3
Nitrogen Dioxide: 9.69 μg/m3
Sulphur Dioxide: 2.52 μg/m3
Ozone: 85.38 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:15 PM
Sunset: 8:22 PM
Daylight: 14 hrs 12 mins
Moonrise: 9:32 PM
Moon Transit: 2:30 AM
Moonset: 8:02 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

9:02 PM - 10:32 PM
7:32 AM - 9:02 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
88.9°F
67.1°F
77.6°F
59%
0 in
4%
0%
9.8 mph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 10.17 μg/m3
PM10: 10.33 μg/m3
Carbon Monoxide: 146.58 μg/m3
Nitrogen Dioxide: 6.36 μg/m3
Sulphur Dioxide: 3.32 μg/m3
Ozone: 101.21 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:15 PM
Sunset: 8:21 PM
Daylight: 14 hrs 10 mins
Moonrise: 9:55 PM
Moon Transit: 3:14 AM
Moonset: 9:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
4:49 PM - 7:19 PM

Minor Periods

9:25 PM - 10:55 PM
8:36 AM - 10:06 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Partly Cloudy
76.5°F
70.7°F
73°F
84%
0.69 in
84%
0%
9.4 mph
2.1


Air Quality

AQI: 1 - Good
PM2.5: 9.22 μg/m3
PM10: 10.53 μg/m3
Carbon Monoxide: 132.79 μg/m3
Nitrogen Dioxide: 3.52 μg/m3
Sulphur Dioxide: 2.84 μg/m3
Ozone: 89.67 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:15 PM
Sunset: 8:20 PM
Daylight: 14 hrs 8 mins
Moonrise: 10:18 PM
Moon Transit: 3:57 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:27 AM - 5:57 AM
5:33 PM - 8:03 PM

Minor Periods

9:48 PM - 11:18 PM
9:40 AM - 11:10 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Fog
72.5°F
69.2°F
71.2°F
97%
0.79 in
93%
0%
7.4 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 5.01 μg/m3
PM10: 5.27 μg/m3
Carbon Monoxide: 161.05 μg/m3
Nitrogen Dioxide: 6.74 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 79.42 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:15 PM
Sunset: 8:18 PM
Daylight: 14 hrs 6 mins
Moonrise: 10:42 PM
Moon Transit: 12:00 AM
Moonset: 11:15 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

10:12 PM - 11:42 PM
10:45 AM - 12:15 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Fog
83.1°F
68.4°F
74.3°F
87%
0.12 in
80%
0%
8.7 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 3.53 μg/m3
PM10: 3.53 μg/m3
Carbon Monoxide: 201.44 μg/m3
Nitrogen Dioxide: 8.02 μg/m3
Sulphur Dioxide: 2.2 μg/m3
Ozone: 52.11 μg/m3

Astronomical

Sunrise: 6:13 AM
Sun Transit: 1:15 PM
Sunset: 8:17 PM
Daylight: 14 hrs 4 mins
Moonrise: 11:08 PM
Moon Transit: 5:26 AM
Moonset: 12:23 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:56 AM - 7:26 AM
7:04 PM - 9:34 PM

Minor Periods

12:00 AM - 12:00 AM
11:53 AM - 1:23 PM

Action Rating: 2 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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