Dial-a-Buoy877-BUOY BAY

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Upper Potomac - UP

Off National Harbor, MD, near Washington D.C. NOTE: BUOY WAS REMOVED 11/30/2017; NO PLANS TO REDEPLOY AT THIS LOCATION

Geolocation is 38.7877, -77.0357

Data in red are more than 12 hours old.
Parameter Group Sort Value Unit Date Graphs
Barometric PressureMeteorological130.3inches2017-11-30 07:42 EST1 7 30
Air TemperatureMeteorological141.4F2017-11-30 07:42 EST1 7 30
Chlorophyll AWaterQuality20.14ug/L2017-11-30 07:42 EST1 7 30
Dissolved OxygenWaterQuality26.10mg/L2017-11-30 07:42 EST1 7 30
Current SpeedCurrents40.635kts2017-11-30 07:42 EST1 7 30
Current DirectionCurrents4179Deg. Mag.2017-11-30 07:42 EST1 7 30
LatitudePosition538.78807Degrees2017-11-30 07:42 EST1 7 30
LongitudePosition5-77.03581Degrees2017-11-30 07:42 EST1 7 30
Relative HumidityMeteorological157%2017-11-30 07:42 EST1 7 30
Water SalinityWaterQuality20.2PSU2017-11-30 07:42 EST1 7 30
Water TemperatureWaterQuality246.7F2017-11-30 07:42 EST1 7 30
TurbidityWaterQuality215NTU2017-11-30 07:42 EST1 7 30
Wind DirectionMeteorological163Deg. Mag.2017-11-30 07:42 EST1 7 30
Sea Nettle ProbabilityWaterQuality20%2017-11-30 07:42 EST1 7 30
Heat IndexMeteorological141.4F2017-11-30 07:42 EST1 7 30
Wind ChillMeteorological137.3F2017-11-30 07:42 EST1 7 30
Water Freezing PointWaterQuality232.0F2017-11-30 07:42 EST1 7 30

Captain John Smith and his crew passed by this point twice in June 1608 as they explored the Potomac River in their unfruitful search for the Northwest Passage to the Pacific Ocean. Smith and his explorers made it all the way up the river to its head at Little Falls, where they left their Discovery Barge and continued on foot to Great Falls.

Today, the area is a bustling metropolis, home to Virginians, Marylanders, and Washingtonians. Washington, D.C., our nation's capital, is a busy city -- but is just a few miles away from scenic natural areas on the Potomac.

The buoy is visible from both the Maryland and Virginia sides of the river from south of the Woodrow Wilson Bridge. Water access is available at marinas up and down both shores, including Belle Haven Marina, on the grounds of the George Washington Memorial Parkway.

Be sure to check the weather forecast before you head out.

For more information on the history of the area surrounding the Upper Potomac Buoy, please visit:

For more in depth analysis please visit data tools.