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

Current Water Temperature

89.2°F

Measurement Time: Thursday, July 2, 2026, 9:55 PM 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

75.6°F
Clear
Clear
78.2°F
84.9°F
100%
WNW 2.9 mph
6.1 mph
81.5°F
68.1°F
0 in
0%
8 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 104°F
L: 71°F
Sunny
Sat
H: 99°F
L: 68°F
Patchy rain nearby
Sun
H: 89°F
L: 66°F
Mist
Mon
H: 86°F
L: 65°F
Sunny
Tue
H: 90°F
L: 66°F

Air Quality

AQI: 1 - Good
PM2.5: 15.5 μg/m3
PM10: 19.4 μg/m3
Carbon Monoxide: 147 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:14 PM
Sunset: 8:41 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:05 PM
Moon Transit: 3:49 AM
Moonset: 9:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
5:23 PM - 7:53 PM

Minor Periods

12:00 AM - 12:00 AM
8:36 AM - 10:06 AM

Action Rating: 3 out of 5

Heat Advisory issued July 2 at 1:32PM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu July 2, 2026, 1:32 PM
Expires: Thu July 2, 2026, 11:00 PM

* WHAT...For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 109. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 107 expected. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern and panhandle West Virginia. * WHEN...For the first Extreme Heat Warning, until 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday. For the Heat Advisory, from 10 AM to 8 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Extreme Heat Warning issued July 2 at 1:32PM EDT until July 3 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu July 2, 2026, 1:32 PM
Expires: Thu July 2, 2026, 11:00 PM

* WHAT...For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 109. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 107 expected. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern and panhandle West Virginia. * WHEN...For the first Extreme Heat Warning, until 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday. For the Heat Advisory, from 10 AM to 8 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Extreme Heat Warning issued July 2 at 1:32PM EDT until July 2 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu July 2, 2026, 1:32 PM
Expires: Thu July 2, 2026, 11:00 PM

* WHAT...For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 109. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 107 expected. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern and panhandle West Virginia. * WHEN...For the first Extreme Heat Warning, until 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday. For the Heat Advisory, from 10 AM to 8 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Friday, July 3, 2026

Weather Forecast

Sunny
103.8°F
70.5°F
88.7°F
55%
0.05 in
57%
0%
9.2 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 12.38 μg/m3
PM10: 15.23 μg/m3
Carbon Monoxide: 143.88 μg/m3
Nitrogen Dioxide: 4.24 μg/m3
Sulphur Dioxide: 2.11 μg/m3
Ozone: 97.29 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:14 PM
Sunset: 8:41 PM
Daylight: 14 hrs 52 mins
Moonrise: 11:05 PM
Moon Transit: 3:49 AM
Moonset: 9:06 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

3:19 AM - 5:49 AM
5:23 PM - 7:53 PM

Minor Periods

12:00 AM - 12:00 AM
8:36 AM - 10:06 AM

Action Rating: 3 out of 5

Saturday, July 4, 2026

Weather Forecast

Sunny
98.8°F
67.6°F
77.8°F
75%
0.74 in
73%
0%
16.8 mph
10


Air Quality

AQI: 1 - Good
PM2.5: 11.04 μg/m3
PM10: 11.84 μg/m3
Carbon Monoxide: 137.58 μg/m3
Nitrogen Dioxide: 6.85 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 94.63 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:14 PM
Sunset: 8:40 PM
Daylight: 14 hrs 52 mins
Moonrise: 12:05 AM
Moon Transit: 4:32 AM
Moonset: 10:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.6%

Best Times for Fishing or Hunting

Major Periods

4:02 AM - 6:32 AM
6:06 PM - 8:36 PM

Minor Periods

9:40 AM - 11:10 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Sunday, July 5, 2026

Weather Forecast

Patchy rain nearby
88.8°F
66.4°F
74.5°F
83%
0.39 in
80%
0%
12.5 mph
9.8


Air Quality

AQI: 1 - Good
PM2.5: 10.94 μg/m3
PM10: 11.52 μg/m3
Carbon Monoxide: 143.88 μg/m3
Nitrogen Dioxide: 4.59 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 100.88 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:14 PM
Sunset: 8:40 PM
Daylight: 14 hrs 51 mins
Moonrise: 12:28 AM
Moon Transit: 5:15 AM
Moonset: 11:13 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.8%

Best Times for Fishing or Hunting

Major Periods

4:45 AM - 7:15 AM
12:00 AM - 12:00 AM

Minor Periods

10:43 AM - 12:13 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 6, 2026

Weather Forecast

Mist
85.8°F
65°F
70.4°F
91%
0.5 in
88%
0%
9.4 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 11.3 μg/m3
PM10: 12.55 μg/m3
Carbon Monoxide: 167.69 μg/m3
Nitrogen Dioxide: 6.27 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:15 PM
Sunset: 8:40 PM
Daylight: 14 hrs 50 mins
Moonrise: 12:50 AM
Moon Transit: 5:58 AM
Moonset: 12:18 AM
Moon Phase: Last Quarter
Moon Illumination: 48.6%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
12:45 AM - 3:15 PM

Minor Periods

11:48 AM - 1:18 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 7, 2026

Weather Forecast

Sunny
90.2°F
65.5°F
76.7°F
74%
0 in
13%
0%
11.9 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 7.16 μg/m3
PM10: 7.38 μg/m3
Carbon Monoxide: 234.44 μg/m3
Nitrogen Dioxide: 5.44 μg/m3
Sulphur Dioxide: 0.61 μg/m3
Ozone: 64.89 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:15 PM
Sunset: 8:40 PM
Daylight: 14 hrs 49 mins
Moonrise: 12:13 AM
Moon Transit: 12:00 AM
Moonset: 1:24 PM
Moon Phase: Last Quarter
Moon Illumination: 37.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:18 PM - 10:48 PM

Minor Periods

12:54 AM - 2:24 PM
12:00 AM - 12:00 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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