Water Temperature of Upper Machedoc Creek in Dahlgren, VA
Current Water Temperature
Measurement Time: Wednesday, May 21, 2025, 9:54 AM EDT
Today's Tides
Low: May 21, 4:04 AM, 0.37 ft
High: May 21, 9:55 AM, 1.74 ft
Low: May 21, 4:35 PM, 0.22 ft
High: May 21, 10:41 PM, 1.75 ft
Temperature Locations
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Local Points of Interest
Potomac River; Naval Surface Warfare CenterSponsored Content
Station Name: Dahlgren
Data Source: NOAA Tides and Currents
Elevation Above Sea Level: 10 feet / 3 meters
Sensor Depth: 1.9 feet / 0.6 meters
Nearest Address:
6388–6478 Sampson Rd
Dahlgren, VA 22448
King George County
GPS Coordinates: 38.320000, -77.036697
Nearby Water Temperatures
Patuxent River, Solomons, MD (31.8 mi)Chesapeake Bay, Cambridge, MD (37.4 mi)
Washington Channel, Washington, DC (38.2 mi)
Coan River, Lewisetta, VA (38.3 mi)
Difficult Run, Oakton, VA (42.2 mi)
Potomac River, Scotland, MD (43.0 mi)
Northeast Branch Anacostia River, Riverdale Park, MD (44.6 mi)
Dead Run, McLean, VA (44.8 mi)
Sligo Creek, Takoma Park, MD (46.1 mi)
Difficult Run, McLean, VA (46.7 mi)
Paint Branch, Calverton, MD (49.4 mi)
Fishing Bay, Crocheron, MD (54.6 mi)
Chesapeake Bay, Annapolis, MD (54.6 mi)
Severn River, Annapolis, MD (54.8 mi)
Choptank River, Cambridge, MD (55.6 mi)
Weather for Dahlgren, Virginia
Current Weather

Humidity: 90%
Feels Like: 59.5°F
Wind: ESE 11.9 mph
Wind Gusts: 16.8 mph
Precipitation: 0.1 in
Cloud Cover: 100%
Visibility: 1 mi
UV Index: 0.3
Five Day Weather Forecast

Wed
H: 60°F
L: 56°F

Thu
H: 56°F
L: 51°F

Fri
H: 63°F
L: 50°F

Sat
H: 68°F
L: 50°F

Sun
H: 71°F
L: 60°F
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:18 PM
Daylight: 14 hrs 26 mins
Moon Transit: 8:11 AM
Moonset: 2:03 PM
Moon Phase: Last Quarter
Moon Illumination: 22.6%
Best Times for Fishing or Hunting
Major Periods
7:41 AM - 10:11 AM12:00 AM - 12:00 AM
Minor Periods
1:33 PM - 3:03 PM2:00 AM - 3:30 AM
Action Rating: 2 out of 5
Coastal Flood Advisory issued May 21 at 7:22AM EDT until May 22 at 12:00AM EDT by NWS Baltimore MD/Washington DC
Effective: Wed May 21, 2025, 7:22 AM
Expires: Wed May 21, 2025, 3:30 PM
* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Charles and King George Counties. * WHEN...Until midnight EDT tonight, especially around the time of high tide. * IMPACTS...At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Dahlgren is at 9:55 AM and 10:41 PM. The next high tide at Goose Bay is at 11:15 AM and 11:50 PM.
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 May 21 at 7:22AM EDT until May 22 at 12:00AM EDT by NWS Baltimore MD/Washington DC
Effective: Wed May 21, 2025, 7:22 AM
Expires: Wed May 21, 2025, 3:30 PM
* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Charles and King George Counties. * WHEN...Until midnight EDT tonight, especially around the time of high tide. * IMPACTS...At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Dahlgren is at 9:55 AM and 10:41 PM. The next high tide at Goose Bay is at 11:15 AM and 11:50 PM.
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 May 21 at 7:22AM EDT until May 22 at 12:00AM EDT by NWS Baltimore MD/Washington DC
Effective: Wed May 21, 2025, 7:22 AM
Expires: Wed May 21, 2025, 3:30 PM
* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Charles and King George Counties. * WHEN...Until midnight EDT tonight, especially around the time of high tide. * IMPACTS...At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Dahlgren is at 9:55 AM and 10:41 PM. The next high tide at Goose Bay is at 11:15 AM and 11:50 PM.
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 May 21 at 7:22AM EDT until May 22 at 12:00AM EDT by NWS Baltimore MD/Washington DC
Effective: Wed May 21, 2025, 7:22 AM
Expires: Wed May 21, 2025, 3:30 PM
* WHAT...Up to one half foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Charles and King George Counties. * WHEN...Until midnight EDT tonight, especially around the time of high tide. * IMPACTS...At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren. * ADDITIONAL DETAILS...Tides two to two and a half feet above normal. The next high tide at Dahlgren is at 9:55 AM and 10:41 PM. The next high tide at Goose Bay is at 11:15 AM and 11:50 PM.
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 May 21 at 7:22AM EDT until May 22 at 5:00AM EDT by NWS Baltimore MD/Washington DC
Effective: Wed May 21, 2025, 7:22 AM
Expires: Wed May 21, 2025, 3:30 PM
* WHAT...Up to one foot of inundation above ground level expected in low lying areas due to tidal flooding. * WHERE...Shoreline in Anne Arundel County. * WHEN...Until 5 AM EDT Thursday, especially around the time of high tide. * IMPACTS...At 3.0 feet, Compromise Street begins to flood in Annapolis. Flooding of much of the City Dock parking lot is occurring. * ADDITIONAL DETAILS...Tides one and a half to two feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 12:28 PM and 1:32 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.
Weather Forecast
Average Temperature: 58.1°F
Average Humidity: 92%
Wind: 19 mph
UV Index: 0.2
Air Quality
Nitrogen Dioxide: 4.78 μg/m3
Sulphur Dioxide: 3.83 μg/m3
Ozone: 93.38 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:18 PM
Daylight: 14 hrs 26 mins
Moon Transit: 8:11 AM
Moonset: 2:03 PM
Moon Phase: Last Quarter
Moon Illumination: 22.6%
Best Times for Fishing or Hunting
Major Periods
7:41 AM - 10:11 AM12:00 AM - 12:00 AM
Minor Periods
1:33 PM - 3:03 PM2:00 AM - 3:30 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 54.6°F
Average Humidity: 94%
Wind: 14.8 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:19 PM
Daylight: 14 hrs 28 mins
Moon Transit: 8:58 AM
Moonset: 3:14 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.9%
Best Times for Fishing or Hunting
Major Periods
8:28 AM - 10:58 AM12:16 AM - 2:46 PM
Minor Periods
2:44 PM - 4:14 PM2:25 AM - 3:55 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 57.1°F
Average Humidity: 69%
Wind: 13 mph
UV Index: 3
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:04 PM
Sunset: 8:20 PM
Daylight: 14 hrs 29 mins
Moon Transit: 12:00 AM
Moonset: 4:27 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM12:00 AM - 12:00 AM
Minor Periods
3:57 PM - 5:27 PM2:50 AM - 4:20 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 60.1°F
Average Humidity: 62%
Wind: 8.5 mph
UV Index: 5
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:05 PM
Sunset: 8:21 PM
Daylight: 14 hrs 31 mins
Moon Transit: 10:38 AM
Moonset: 5:43 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.4%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM10:08 AM - 12:38 AM
Minor Periods
5:13 PM - 6:43 PM3:18 AM - 4:48 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 64.4°F
Average Humidity: 75%
Wind: 10.1 mph
UV Index: 4
Air Quality
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3
Astronomical
Sun Transit: 1:05 PM
Sunset: 8:21 PM
Daylight: 14 hrs 32 mins
Moon Transit: 11:34 AM
Moonset: 7:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.2%
Best Times for Fishing or Hunting
Major Periods
12:24 AM - 2:54 AM11:04 AM - 1:34 PM
Minor Periods
6:33 PM - 8:03 PM3:50 AM - 5:20 AM
Action Rating: 4 out of 5