Maryland: water temperature

At sea, 17.1 °C on average across 22 stations, from 15.6 °C (Bishops Head, MD) to 21.2 °C (8574680 - Baltimore, MD). In fresh water, 12.4 °C on average across 19 stations, from 8.1 °C (Savage River Near Barton, MD) to 15.9 °C (Susquehanna River Near Darlington, MD).

See on the map

Sea and ocean

Lakes and rivers

Where to swim, month by month

The normal sea temperature each month along the coast: pick a month to see where the water is warmest and whether you can swim.

• January 6.0 °C · up to 9.7 °C
• February 5.1 °C · up to 8.2 °C
• March 6.7 °C · up to 8.1 °C
• April 11.2 °C · up to 12.4 °C
• May 16.0 °C · up to 17.6 °C
• June 22.0 °C · up to 23.8 °C
• July 26.3 °C · up to 27.9 °C
• August 26.3 °C · up to 27.3 °C
• September 23.9 °C · up to 24.7 °C
• October 19.6 °C · up to 19.8 °C
• November 13.6 °C · up to 15.4 °C
• December 9.6 °C · up to 12.5 °C

Warmest water today

Where these numbers come from

Every value is a real reading from an instrument, at its position: a buoy, a wharf, a river or lake station. It keeps the time it was measured. A reading too far from those of nearby stations is marked with a “?”. Between stations, the map gives a satellite or model estimate, always labelled as such.

Sources: IOOS, stations côtières, NOAA CO-OPS, NOAA NDBC, USGS, eaux des États-Unis. Sources and credits

Nearby

• Delaware 24 stations · sea 16.0 °C · fresh water 12.8 °C
• District of Columbia 7 stations · sea 16.2 °C · fresh water 14.2 °C
• New Jersey 58 stations · sea 14.6 °C · fresh water 11.9 °C
• Virginia 61 stations · sea 16.9 °C · fresh water 12.2 °C
• Pennsylvania 135 stations · sea 16.9 °C · fresh water 11.1 °C
• West Virginia 35 stations · fresh water 12.2 °C