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

Current Water Temperature

83.8°F

Measurement Time: Saturday, July 18, 2026, 2:55 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

74.1°F
Overcast
Overcast
77.9°F
76.5°F
100%
SSW 2.5 mph
4.6 mph
72.3°F
67.4°F
0 in
0%
1 mi
1015 mbar
0.2

Five Day Weather Forecast

Smoky haze
Sat
H: 98°F
L: 71°F
Sunny
Sun
H: 86°F
L: 66°F
Sunny
Mon
H: 86°F
L: 58°F
Partly Cloudy
Tue
H: 93°F
L: 64°F
Partly Cloudy
Wed
H: 84°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 75.4 μg/m3
PM10: 77.8 μg/m3
Carbon Monoxide: 166 μg/m3
Nitrogen Dioxide: 7.1 μg/m3
Sulphur Dioxide: 1.9 μg/m3
Ozone: 60 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:16 PM
Sunset: 8:34 PM
Daylight: 14 hrs 36 mins
Moonrise: 10:49 AM
Moon Transit: 5:03 PM
Moonset: 11:08 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
4:33 PM - 7:03 PM

Minor Periods

12:00 AM - 12:00 AM
10:19 AM - 11:49 AM

Action Rating: 3 out of 5

Air Quality Alert issued July 17 at 4:40PM EDT by NWS Baltimore MD/Washington DC

Effective: Fri July 17, 2026, 4:40 PM
Expires: Sun July 19, 2026, 12:00 AM

The Maryland Department of the Environment has issued a Code ORANGE Air Quality Alert Saturday for the Maryland Piedmont region. Concentrations of fine particulate matter due to wildfire smoke will persist at levels consistent with an Air Quality Index of Unhealthy (Red Alert) to Very Unhealthy (Purple Alert) Friday night into Saturday morning. Air quality begins to improve Saturday afternoon. Code Purple and Code Red Air Quality Alerts mean that air pollution concentrations within the region are unhealthy to very unhealthy for the general population. A Code Orange Air Quality Alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, people suffering from asthma, heart disease or other lung diseases and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles visit the web site mde.maryland.gov/programs/air/AirQualityMonitoring/Pages/index.aspx
Saturday, July 18, 2026

Weather Forecast

Smoky haze
98.1°F
70.7°F
80.2°F
75%
0.66 in
71%
0%
6.9 mph
8.2


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 48.35 μg/m3
PM10: 50.46 μg/m3
Carbon Monoxide: 156.54 μg/m3
Nitrogen Dioxide: 5.79 μg/m3
Sulphur Dioxide: 1.58 μg/m3
Ozone: 79.75 μg/m3

Astronomical

Sunrise: 5:58 AM
Sun Transit: 1:16 PM
Sunset: 8:34 PM
Daylight: 14 hrs 36 mins
Moonrise: 10:49 AM
Moon Transit: 5:03 PM
Moonset: 11:08 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
4:33 PM - 7:03 PM

Minor Periods

12:00 AM - 12:00 AM
10:19 AM - 11:49 AM

Action Rating: 3 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
86.2°F
66°F
75.5°F
73%
0.03 in
41%
0%
11.9 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 7.15 μg/m3
PM10: 7.2 μg/m3
Carbon Monoxide: 204.5 μg/m3
Nitrogen Dioxide: 4.31 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 82.5 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:16 PM
Sunset: 8:34 PM
Daylight: 14 hrs 34 mins
Moonrise: 11:55 AM
Moon Transit: 5:47 PM
Moonset: 12:08 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
5:17 PM - 7:47 PM

Minor Periods

11:25 AM - 12:55 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
85.7°F
57.5°F
72°F
61%
0 in
5%
0%
11.6 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 11.51 μg/m3
PM10: 11.59 μg/m3
Carbon Monoxide: 230 μg/m3
Nitrogen Dioxide: 9.92 μg/m3
Sulphur Dioxide: 1.36 μg/m3
Ozone: 80.58 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:16 PM
Sunset: 8:33 PM
Daylight: 14 hrs 33 mins
Moonrise: 12:59 AM
Moon Transit: 6:31 PM
Moonset: 12:30 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:21 AM - 9:51 AM
6:01 PM - 8:31 PM

Minor Periods

12:29 AM - 1:59 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Partly Cloudy
93.4°F
64.2°F
75.5°F
77%
0.56 in
75%
0%
14.5 mph
6.6


Air Quality

AQI: 1 - Good
PM2.5: 6.02 μg/m3
PM10: 6.37 μg/m3
Carbon Monoxide: 144.53 μg/m3
Nitrogen Dioxide: 3.46 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 86.21 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:16 PM
Sunset: 8:32 PM
Daylight: 14 hrs 31 mins
Moonrise: 2:03 PM
Moon Transit: 7:15 PM
Moonset: 12:54 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:05 AM - 10:35 AM
6:45 PM - 9:15 PM

Minor Periods

1:33 PM - 3:03 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Partly Cloudy
83.5°F
61.3°F
72.5°F
74%
0.03 in
40%
0%
15 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 4.22 μg/m3
PM10: 4.33 μg/m3
Carbon Monoxide: 194.33 μg/m3
Nitrogen Dioxide: 3.23 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:16 PM
Sunset: 8:31 PM
Daylight: 14 hrs 30 mins
Moonrise: 3:06 PM
Moon Transit: 8:00 PM
Moonset: 12:20 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

8:50 AM - 11:20 AM
7:30 PM - 10:00 PM

Minor Periods

2:36 PM - 4:06 PM
12:00 AM - 12:00 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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