Water Temperature of the Potomac River in Point of Rocks, MD

Current Water Temperature

79.7°F

Measurement Time: Tuesday, May 19, 2026, 10:55 AM EDT

Temperature Locations

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Local Points of Interest

Paton Island; Heaters island; Chesapeake and Ohio Canal National Historic Park

Potomac River

Station Name: POTOMAC RIVER AT POINT OF ROCKS, MD
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 217 feet

Nearest Address:
3707 Canal Rd
Point of Rocks, MD 21777
Frederick County

GPS Coordinates: 39.2735833, -77.5431111

Nearby Water Temperatures

Carroll Creek, Frederick, MD (12.1 mi)
Carroll Creek, Frederick, MD (12.5 mi)
Big Hunting Creek, Thurmont, MD (25.1 mi)
Difficult Run, McLean, VA (26 mi)
Spout Run, Boyce, VA (28.5 mi)
Difficult Run, Oakton, VA (29.1 mi)
Dead Run, McLean, VA (29.3 mi)
Patuxent River, Brighton, MD (29.4 mi)
Sligo Creek, Takoma Park, MD (35 mi)
Paint Branch, Calverton, MD (35.2 mi)
Washington Channel, Washington, DC (39.3 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (39.5 mi)
Scotts Level Branch, Milford Mill, MD (42.2 mi)
Cacapon River , Great Cacapon, WV (46.1 mi)
Gunpowder Falls, Parkton, MD (51.4 mi)

Weather for Point of Rocks, Maryland

Current Weather

99.4°F
Sunny
Sunny
101.3°F
101.3°F
27%
SSW 8.3 mph
10.1 mph
99.4°F
58°F
0 in
17%
6 mi
1018 mbar
7.3

Five Day Weather Forecast

Patchy rain nearby
Tue
H: 101°F
L: 68°F
Moderate rain
Wed
H: 89°F
L: 64°F
Moderate rain
Thu
H: 55°F
L: 50°F
Heavy rain
Fri
H: 52°F
L: 50°F
Heavy rain
Sat
H: 54°F
L: 51°F

Air Quality

AQI: 1 - Good
PM2.5: 9.85 μg/m3
PM10: 11.55 μg/m3
Carbon Monoxide: 144.85 μg/m3
Nitrogen Dioxide: 5.95 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:06 PM
Sunset: 8:21 PM
Daylight: 14 hrs 28 mins
Moonrise: 8:10 AM
Moon Transit: 4:11 PM
Moonset: 12:08 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
3:41 PM - 6:11 PM

Minor Periods

7:40 AM - 9:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

This is only a test for monitoring of vital dissemination systems.

Effective: Tue May 19, 2026, 2:20 PM
Expires: Tue May 19, 2026, 2:30 PM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.
Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
100.8°F
67.6°F
81.5°F
50%
0 in
84%
0%
8.3 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 9.08 μg/m3
PM10: 10.82 μg/m3
Carbon Monoxide: 149.01 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 88.48 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 1:06 PM
Sunset: 8:21 PM
Daylight: 14 hrs 28 mins
Moonrise: 8:10 AM
Moon Transit: 4:11 PM
Moonset: 12:08 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:52 AM - 7:22 AM
3:41 PM - 6:11 PM

Minor Periods

7:40 AM - 9:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Moderate rain
88.9°F
64.2°F
72.6°F
72%
0.5 in
85%
0%
11.9 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 7.69 μg/m3
PM10: 8.75 μg/m3
Carbon Monoxide: 145.17 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 1.76 μg/m3
Ozone: 68.32 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:06 PM
Sunset: 8:22 PM
Daylight: 14 hrs 29 mins
Moonrise: 9:25 AM
Moon Transit: 5:13 PM
Moonset: 12:05 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

5:56 AM - 8:26 AM
4:43 PM - 7:13 PM

Minor Periods

8:55 AM - 10:25 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, May 21, 2026

Weather Forecast

Moderate rain
55.4°F
50°F
53.8°F
92%
0.31 in
86%
0%
9.4 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.61 μg/m3
PM10: 3.89 μg/m3
Carbon Monoxide: 140.4 μg/m3
Nitrogen Dioxide: 5.34 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 62.08 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:06 PM
Sunset: 8:23 PM
Daylight: 14 hrs 31 mins
Moonrise: 10:42 AM
Moon Transit: 6:09 PM
Moonset: 12:50 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:55 AM - 9:25 AM
5:39 PM - 8:09 PM

Minor Periods

10:12 AM - 11:42 AM
12:20 AM - 1:50 AM

Action Rating: 3 out of 5

Friday, May 22, 2026

Weather Forecast

Heavy rain
52.4°F
50.3°F
51.3°F
98%
0.9 in
80%
0%
8.7 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 9.05 μg/m3
PM10: 9.71 μg/m3
Carbon Monoxide: 195.7 μg/m3
Nitrogen Dioxide: 13.51 μg/m3
Sulphur Dioxide: 2.45 μg/m3
Ozone: 53.44 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:06 PM
Sunset: 8:23 PM
Daylight: 14 hrs 32 mins
Moonrise: 11:55 AM
Moon Transit: 7:00 PM
Moonset: 1:25 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:48 AM - 10:18 AM
6:30 PM - 9:00 PM

Minor Periods

11:25 AM - 12:55 AM
12:55 AM - 2:25 AM

Action Rating: 2 out of 5

Saturday, May 23, 2026

Weather Forecast

Heavy rain
53.7°F
51.2°F
52.3°F
98%
0.81 in
64%
0%
11 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 4.9 μg/m3
PM10: 5.7 μg/m3
Carbon Monoxide: 158.62 μg/m3
Nitrogen Dioxide: 9.07 μg/m3
Sulphur Dioxide: 1.99 μg/m3
Ozone: 49.08 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:06 PM
Sunset: 8:24 PM
Daylight: 14 hrs 34 mins
Moonrise: 1:04 PM
Moon Transit: 7:46 PM
Moonset: 1:53 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

8:36 AM - 11:06 AM
7:16 PM - 9:46 PM

Minor Periods

12:34 AM - 2:04 PM
1:23 AM - 2:53 AM

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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