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

Current Water Temperature

81.5°F

Measurement Time: Tuesday, July 21, 2026, 4:55 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

77°F
Overcast
Overcast
80.7°F
83.3°F
89%
SSE 5.8 mph
6.9 mph
78.8°F
71.9°F
0 in
100%
9 mi
1010 mbar
1.7

Five Day Weather Forecast

Sunny
Tue
H: 96°F
L: 69°F
Sunny
Wed
H: 84°F
L: 63°F
Sunny
Thu
H: 79°F
L: 51°F
Sunny
Fri
H: 83°F
L: 54°F
Sunny
Sat
H: 86°F
L: 59°F

Air Quality

AQI: 1 - Good
PM2.5: 5.8 μg/m3
PM10: 6.1 μg/m3
Carbon Monoxide: 181 μg/m3
Nitrogen Dioxide: 2.6 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 79 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

Small Craft Advisory issued July 20 at 10:16PM EDT until July 21 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Mon July 20, 2026, 10:16 PM
Expires: Tue July 21, 2026, 6:30 AM

* WHAT...Southwest 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 8 PM EDT Tuesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 21 at 2:32AM EDT until July 22 at 4:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Tue July 21, 2026, 2:32 AM
Expires: Tue July 21, 2026, 10:45 AM

* WHAT...Southwest winds 10 to 15 kt with gusts up to 25 kt expected. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN...From 2 PM this afternoon to 4 AM EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Tuesday, July 21, 2026

Weather Forecast

Sunny
95.9°F
68.8°F
79.8°F
76%
0.45 in
72%
0%
18.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 7.77 μg/m3
PM10: 8.1 μg/m3
Carbon Monoxide: 169.17 μg/m3
Nitrogen Dioxide: 2.56 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 87.25 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

Sunny
84.2°F
63.4°F
73.9°F
68%
0.05 in
57%
0%
14.5 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 4 μg/m3
PM10: 4.09 μg/m3
Carbon Monoxide: 143.46 μg/m3
Nitrogen Dioxide: 2.28 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 81.25 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

Thursday, July 23, 2026

Weather Forecast

Sunny
79.4°F
51.1°F
65.6°F
57%
0 in
3%
0%
11.2 mph
8.5


Air Quality

AQI: 1 - Good
PM2.5: 5.45 μg/m3
PM10: 5.66 μg/m3
Carbon Monoxide: 132.08 μg/m3
Nitrogen Dioxide: 4.32 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 80.13 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:16 PM
Sunset: 8:31 PM
Daylight: 14 hrs 28 mins
Moonrise: 4:09 PM
Moon Transit: 8:48 PM
Moonset: 12:50 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:37 AM - 12:07 AM
8:18 PM - 10:48 PM

Minor Periods

3:39 PM - 5:09 PM
12:20 AM - 1:50 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
82.9°F
54.3°F
69°F
54%
0 in
3%
0%
5.6 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 7.68 μg/m3
PM10: 7.97 μg/m3
Carbon Monoxide: 173.37 μg/m3
Nitrogen Dioxide: 8.22 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:16 PM
Sunset: 8:30 PM
Daylight: 14 hrs 26 mins
Moonrise: 5:09 PM
Moon Transit: 9:38 PM
Moonset: 1:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:26 AM - 12:56 AM
9:08 PM - 11:38 PM

Minor Periods

4:39 PM - 6:09 PM
12:54 AM - 2:24 AM

Action Rating: 2 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
86.3°F
58.7°F
71.6°F
57%
0 in
3%
0%
7.4 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 10.59 μg/m3
PM10: 12.38 μg/m3
Carbon Monoxide: 202.89 μg/m3
Nitrogen Dioxide: 14.59 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:16 PM
Sunset: 8:29 PM
Daylight: 14 hrs 25 mins
Moonrise: 6:05 PM
Moon Transit: 10:29 PM
Moonset: 2:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

11:17 AM - 1:47 PM
12:00 AM - 12:00 AM

Minor Periods

5:35 PM - 7:05 PM
1:36 AM - 3:06 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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