Live readings · updated daily
Water temperature in Maryland
The latest readings from USGS real-time water sensors across Maryland, warmest first. Snapshot updated August 21, 2026.
Warmest sensor reading right now
USGS gauge POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA · as of 8 hrs ago
All reporting stations (warmest 50 of 150)
| Station | Water temp | Streamflow | Gage height | Observed |
|---|---|---|---|---|
| POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STAUSGS gauge | 81°F27°C | 3,230 ft³/s | 3.07 ft | 8 hrs ago |
| SUSQUEHANNA RIVER NEAR DARLINGTON, MDUSGS gauge | 80°F26°C | — | — | 9 hrs ago |
| POTOMAC RIVER AT POINT OF ROCKS, MDUSGS gauge | 78°F26°C | 3,890 ft³/s | 2.09 ft | 9 hrs ago |
| CHOPTANK RIVER NEAR GREENSBORO, MDUSGS gauge | 76°F24°C | 46 ft³/s | 2.74 ft | 9 hrs ago |
| MONOCACY RIVER NEAR DICKERSON, MDUSGS gauge | 75°F24°C | 471 ft³/s | 2.31 ft | 8 hrs ago |
| Patuxent R at Gov Bridge Natural Area nr Bowie MDUSGS gauge | 75°F24°C | — | — | 9 hrs ago |
| DEEP CREEK LAKE NEAR THAYERVILLE, MDUSGS gauge | 74°F23°C | — | — | 9 hrs ago |
| NORTHWEST BRANCH ANACOSTIA RIVER AT BRENTWOOD, MDUSGS gauge | 74°F23°C | 77 ft³/s | 1.73 ft | 9 hrs ago |
| NORTHEAST BRANCH ANACOSTIA RIVER AT RIVERDALE, MDUSGS gauge | 74°F23°C | 69 ft³/s | 0.94 ft | 9 hrs ago |
| SLIGO CREEK NEAR TAKOMA PARK, MDUSGS gauge | 73°F23°C | 11 ft³/s | 1.07 ft | 8 hrs ago |
| PAINT BRANCH NEAR COLLEGE PARK, MDUSGS gauge | 72°F22°C | 13 ft³/s | 1.83 ft | 9 hrs ago |
| SCOTTS LEVEL BRANCH AT ROCKDALE, MDUSGS gauge | 70°F21°C | 1 ft³/s | 0.68 ft | 8 hrs ago |
| PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge | 70°F21°C | 4 ft³/s | 1.24 ft | 9 hrs ago |
| FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge | 70°F21°C | 1 ft³/s | 1.86 ft | 9 hrs ago |
| SAMS CREEK AT MCKINSTRYS MILL, MDUSGS gauge | 68°F20°C | 3 ft³/s | 1.43 ft | 9 hrs ago |
| YOUGHIOGHENY RIVER AT FRIENDSVILLE, MDUSGS gauge | 65°F18°C | 549 ft³/s | 3.07 ft | 8 hrs ago |
| SAVAGE RIVER NEAR BARTON, MDUSGS gauge | 64°F18°C | 46 ft³/s | 1.42 ft | 9 hrs ago |
| GUNPOWDER FALLS NEAR PARKTON, MDUSGS gauge | 59°F15°C | 108 ft³/s | 1.98 ft | 9 hrs ago |
| SAVAGE RIV BL SAVAGE RIV DAM NEAR BLOOMINGTON, MDUSGS gauge | 57°F14°C | 63 ft³/s | 0.80 ft | 9 hrs ago |
| ANTIETAM CREEK NEAR SHARPSBURG, MDUSGS gauge | — | 120 ft³/s | 2.39 ft | 9 hrs ago |
| ANTIETAM CREEK NEAR WAYNESBORO, PAUSGS gauge | — | 41 ft³/s | 2.26 ft | 8 hrs ago |
| ARROWHEAD RUN AT THAYERVILLE, MDUSGS gauge | — | 1 ft³/s | 2.75 ft | 9 hrs ago |
| BAISMAN RUN AT BROADMOOR, MDUSGS gauge | — | 0 ft³/s | 1.10 ft | 9 hrs ago |
| BEAR CREEK AT FRIENDSVILLE, MDUSGS gauge | — | 210 ft³/s | 2.59 ft | 9 hrs ago |
| BEAVER RUN NEAR FINKSBURG, MDUSGS gauge | — | 5 ft³/s | 0.50 ft | 9 hrs ago |
| BEAVERDAM CREEK NEAR CHEVERLY, MDUSGS gauge | — | 12 ft³/s | 1.34 ft | 9 hrs ago |
| BEAVERDAM RUN AT COCKEYSVILLE, MDUSGS gauge | — | 10 ft³/s | 2.15 ft | 9 hrs ago |
| BEETREE RUN AT BENTLEY SPRINGS, MDUSGS gauge | — | 5 ft³/s | 0.66 ft | 9 hrs ago |
| BENNETT CREEK AT PARK MILLS, MDUSGS gauge | — | 20 ft³/s | 1.54 ft | 8 hrs ago |
| BIG ELK CREEK AT ELK MILLS, MDUSGS gauge | — | 48 ft³/s | 3.38 ft | 9 hrs ago |
| BIG PIPE CREEK AT BRUCEVILLE, MDUSGS gauge | — | 39 ft³/s | 1.10 ft | 8 hrs ago |
| BIRCH BRANCH AT SHOWELL, MDUSGS gauge | — | 2 ft³/s | 3.46 ft | 8 hrs ago |
| BOTTLE BRANCH AT BERLIN, MDUSGS gauge | — | — | 1.47 ft | 9 hrs ago |
| BYNUM RUN AT BEL AIR, MDUSGS gauge | — | 6 ft³/s | 0.66 ft | 9 hrs ago |
| BYNUM RUN NEAR ABINGDON, MDUSGS gauge | — | 28 ft³/s | 2.80 ft | 9 hrs ago |
| CABIN BRANCH NEAR BOYDS, MDUSGS gauge | — | 1 ft³/s | 4.24 ft | 9 hrs ago |
| CASSELMAN RIVER AT GRANTSVILLE, MDUSGS gauge | — | 208 ft³/s | 1.90 ft | 9 hrs ago |
| CATOCTIN CREEK NEAR MIDDLETOWN, MDUSGS gauge | — | 11 ft³/s | 1.60 ft | 8 hrs ago |
| CATTAIL CREEK NEAR GLENWOOD, MDUSGS gauge | — | 11 ft³/s | 0.62 ft | 8 hrs ago |
| Cherry Creek at State Park Road near McHenry, MDUSGS gauge | — | 24 ft³/s | 2.77 ft | 9 hrs ago |
| Ches Bay at Mouth of Susq R at Havre de Grace, MDUSGS gauge | — | — | 1.26 ft | 9 hrs ago |
| CHESTERVILLE BRANCH NEAR CRUMPTON, MDUSGS gauge | — | — | 3.21 ft | 9 hrs ago |
| CHICAMACOMICO RIVER NEAR SALEM, MDUSGS gauge | — | 8 ft³/s | 0.41 ft | 9 hrs ago |
| CONOCOCHEAGUE CREEK AT FAIRVIEW, MDUSGS gauge | — | 200 ft³/s | 1.81 ft | 8 hrs ago |
| CRANBERRY BRANCH NEAR WESTMINSTER, MDUSGS gauge | — | 0 ft³/s | 1.22 ft | 9 hrs ago |
| DEAD RUN AT FRANKLINTOWN, MDUSGS gauge | — | 3 ft³/s | 0.45 ft | 9 hrs ago |
| DEAD RUN AT WOODLAWN, MDUSGS gauge | — | — | 0.30 ft | 9 hrs ago |
| DEAD RUN NEAR CATONSVILLE, MDUSGS gauge | — | — | 0.31 ft | 9 hrs ago |
| DEAD RUN TRIBUTARY AT WOODLAWN, MDUSGS gauge | — | — | 2.82 ft | 9 hrs ago |
| DEAD RUN TRIBUTARY NEAR WOODLAWN, MDUSGS gauge | — | — | 0.19 ft | 9 hrs ago |
Station links open the official monitoring page with charts and history.
About these readings
Readings come from USGS real-time monitoring stations — 19 sensors are currently reporting a water temperature in Maryland. Each figure is a point measurement at one sensor, usually on a river or stream — it doesn’t describe a whole lake or shoreline, and coverage varies across the state. Data is provisional and can be revised by the USGS.
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Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.