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

Current Water Temperature

66.6°F

Measurement Time: Thursday, September 18, 2025, 1:45 AM EDT

Temperature Locations

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Local Points of Interest

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

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Potomac River

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

Elevation Above Sea Level: 217 feet / 66 meters

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 (26.0 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 (35.0 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

63°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 100%
Feels Like: 63°F
Wind: WNW 2.9 mph
Wind Gusts: 6.1 mph
Pressure: 30.05 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Cloudy
Thu
H: 84°F
L: 59°F
Sunny
Fri
H: 89°F
L: 61°F
Overcast
Sat
H: 67°F
L: 60°F
Patchy rain nearby
Sun
H: 70°F
L: 60°F
Partly Cloudy
Mon
H: 82°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 10.36 μg/m3
PM10: 10.92 μg/m3
Carbon Monoxide: 360.75 μg/m3
Nitrogen Dioxide: 8.51 μg/m3
Sulphur Dioxide: 4.81 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:04 PM
Sunset: 7:13 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:25 AM
Moon Transit: 10:45 AM
Moonset: 5:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:15 AM - 12:45 AM

Minor Periods

5:24 PM - 6:54 PM
2:55 AM - 4:25 AM

Action Rating: 3 out of 5

Coastal Flood Advisory issued September 18 at 1:56AM EDT until September 18 at 8:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Thu September 18, 2025, 1:56 AM
Expires: Thu September 18, 2025, 8:00 AM

* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Anne Arundel County. * WHEN...Until 8 AM EDT this morning, especially around the time of high tide. * IMPACTS...At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. * ADDITIONAL DETAILS...Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 3:36 AM.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.


Coastal Flood Advisory issued September 18 at 1:56AM EDT until September 18 at 8:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Thu September 18, 2025, 1:56 AM
Expires: Thu September 18, 2025, 8:00 AM

* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Anne Arundel County. * WHEN...Until 8 AM EDT this morning, especially around the time of high tide. * IMPACTS...At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. * ADDITIONAL DETAILS...Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 3:36 AM.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Thursday, September 18, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 69.4°F
Average Humidity: 82%
Chance of Rain: 0%
Wind: 5.4 mph
UV Index: 1.5

Air Quality

AQI: 1 - Good
PM2.5: 10.39 μg/m3
PM10: 10.72 μg/m3
Carbon Monoxide: 384.58 μg/m3
Nitrogen Dioxide: 14.14 μg/m3
Sulphur Dioxide: 5.58 μg/m3
Ozone: 67.64 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:04 PM
Sunset: 7:13 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:25 AM
Moon Transit: 10:45 AM
Moonset: 5:54 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:15 AM - 12:45 AM

Minor Periods

5:24 PM - 6:54 PM
2:55 AM - 4:25 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 73.8°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 5.8 mph
UV Index: 1.5

Air Quality

AQI: 2 - Moderate
PM2.5: 19.25 μg/m3
PM10: 19.53 μg/m3
Carbon Monoxide: 432.01 μg/m3
Nitrogen Dioxide: 16.52 μg/m3
Sulphur Dioxide: 8.7 μg/m3
Ozone: 82.64 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:03 PM
Sunset: 7:11 PM
Daylight: 12 hrs 16 mins
Moonrise: 4:33 AM
Moon Transit: 11:31 AM
Moonset: 6:19 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:22 AM - 2:52 AM
11:01 AM - 1:31 PM

Minor Periods

5:49 PM - 7:19 PM
4:03 AM - 5:33 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 63.6°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 1.4

Air Quality

AQI: 2 - Moderate
PM2.5: 18.95 μg/m3
PM10: 19.24 μg/m3
Carbon Monoxide: 455.03 μg/m3
Nitrogen Dioxide: 26.4 μg/m3
Sulphur Dioxide: 9.26 μg/m3
Ozone: 64.36 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 1:03 PM
Sunset: 7:10 PM
Daylight: 12 hrs 13 mins
Moonrise: 5:38 AM
Moon Transit: 12:15 AM
Moonset: 6:41 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:06 AM - 3:36 AM
11:45 AM - 2:15 PM

Minor Periods

6:11 PM - 7:41 PM
5:08 AM - 6:38 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 65°F
Average Humidity: 87%
Chance of Rain: 89%
Wind: 7.6 mph
UV Index: 0.3

Air Quality

AQI: 2 - Moderate
PM2.5: 18.36 μg/m3
PM10: 20.93 μg/m3
Carbon Monoxide: 381.77 μg/m3
Nitrogen Dioxide: 18.47 μg/m3
Sulphur Dioxide: 7.89 μg/m3
Ozone: 71.28 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:03 PM
Sunset: 7:08 PM
Daylight: 12 hrs 11 mins
Moonrise: 6:41 AM
Moon Transit: 12:56 AM
Moonset: 7:02 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:48 AM - 4:18 AM
12:26 AM - 2:56 PM

Minor Periods

6:32 PM - 8:02 PM
6:11 AM - 7:41 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 70.4°F
Average Humidity: 73%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 13.86 μg/m3
PM10: 16.15 μg/m3
Carbon Monoxide: 390.35 μg/m3
Nitrogen Dioxide: 23.61 μg/m3
Sulphur Dioxide: 7.87 μg/m3
Ozone: 50.85 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:02 PM
Sunset: 7:07 PM
Daylight: 12 hrs 8 mins
Moonrise: 7:42 AM
Moon Transit: 1:37 PM
Moonset: 7:22 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
1:07 PM - 3:37 PM

Minor Periods

6:52 PM - 8:22 PM
7:12 AM - 8:42 AM

Action Rating: 5 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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