What is the average water temperature in Maryland?

The current average water temperature across Maryland's monitored water bodies is 66.8°F.

🌡️

Maryland Water Temperatures

Q: What is the warmest lake in Maryland today?

Susquehanna River Near Darlington, Md at 83.7°F.

Current lake & river temperatures in Maryland — updated daily from USGS sensors.

With Data

66.8°F

State Avg

83.7°F

Warmest

83.7°F

Warmest

Susquehanna River Near Darlington, Md

66.8°F

State Average

100 water bodies

41.4°F

Coldest

Meetinghouse Branch At Camp Springs, Md

🏊

Swimming Conditions

⚠️ Brisk — wetsuit recommended

Based on avg 66.8°F

🎣

Fishing Conditions

🎣 Good — trout, walleye, bass

Based on avg 66.8°F

Maryland — Ranked by Temperature

30 with data

#	Water Body	°F	°C	Condition	🏊	Date
1	Susquehanna River Near Darlington, Md River	83.7°	28.7°	☀️ Warm	🏊 Excellent	Jul 27
2	Potomac River At Point Of Rocks, Md River	80.8°	27.1°	☀️ Warm	🏊 Excellent	Jul 27
3	Monocacy River Near Dickerson, Md River	79°	26.1°	☀️ Warm	✅ Good	Jul 27
4	Northwest Branch Anacostia River At Brentwood, Md River	78.8°	26°	☀️ Warm	✅ Good	Jul 27
5	Northeast Branch Anacostia River At Riverdale, Md River	76.1°	24.5°	☀️ Warm	✅ Good	Jul 27
6	Beaverdam Creek Near Cheverly, Md River	76.1°	24.5°	☀️ Warm	✅ Good	Jul 17
7	Potomac River Near Wash, Dc Little Falls Pump Sta River	75.6°	24.2°	☀️ Warm	✅ Good	Sep 30
8	Patuxent R At Gov Bridge Natural Area Nr Bowie Md Lake	75.4°	24.1°	☀️ Warm	✅ Good	Jul 27
9	Deep Creek Lake Near Thayerville, Md River	75°	23.9°	☀️ Warm	✅ Good	Jul 27
10	Sams Creek At Mckinstrys Mill, Md River	73.9°	23.3°	🌤️ Comfortable	✅ Good	Jul 27
11	Mattawoman Creek Near Pomonkey, Md River	72.9°	22.7°	🌤️ Comfortable	✅ Good	Jun 26
12	Paint Branch Near College Park, Md Lake	72°	22.2°	🌤️ Comfortable	✅ Good	Jul 27
13	Foster Branch Near Joppatowne, Md Lake	70.3°	21.3°	🌤️ Comfortable	⚠️ Brisk	Jul 27
14	Plumtree Run Near Bel Air, Md Lake	70.3°	21.3°	🌤️ Comfortable	⚠️ Brisk	Jul 27
15	Scotts Level Branch At Rockdale, Md Lake	70°	21.1°	🌤️ Comfortable	⚠️ Brisk	Jul 27
16	Patuxent River Below Brighton Dam Near Brighton Md River	69.8°	21°	🌤️ Comfortable	⚠️ Brisk	Oct 9
17	Herring Run At Sinclair Lane At Baltimore, Md Lake	69.1°	20.6°	🌤️ Comfortable	⚠️ Brisk	Oct 3
18	Youghiogheny River At Friendsville, Md River	68.9°	20.5°	🌤️ Comfortable	⚠️ Brisk	Jul 27
19	Savage River Near Barton, Md River	67.5°	19.7°	🌤️ Comfortable	⚠️ Brisk	Jul 27
20	Choptank River Near Greensboro, Md River	65.7°	18.7°	🌤️ Comfortable	⚠️ Brisk	May 9
21	Carroll Creek Near Frederick, Md River	60.8°	16°	🌊 Cool	🚫 Cold	Mar 30
22	Sligo Creek Near Takoma Park, Md River	59°	15°	🌊 Cool	🚫 Cold	Apr 15
23	Moores Run At Radecke Ave At Baltimore, Md Lake	56.8°	13.8°	🌊 Cool	🚫 Cold	Oct 10
24	Savage Riv Bl Savage Riv Dam Near Bloomington, Md Reservoir	56.5°	13.6°	🌊 Cool	🚫 Cold	Jul 27
25	North Branch Potomac River At Luke, Md River	56.3°	13.5°	🌊 Cool	🚫 Cold	Sep 29
26	Gunpowder Falls Near Parkton, Md Lake	55.9°	13.3°	🌊 Cool	🚫 Cold	Jul 26
27	Chesterville Branch Near Crumpton, Md Lake	51.8°	11°	❄️ Cold	⛔ Very cold	Nov 3
28	Piscataway Creek Trib At Joint Base Andrews, Md River	51.6°	10.9°	❄️ Cold	⛔ Very cold	Apr 9
29	Piscataway Creek At Woodyard, Md River	41.5°	5.3°	🧊 Very Cold	⛔ Very cold	Dec 7
30	Meetinghouse Branch At Camp Springs, Md Lake	41.4°	5.2°	🧊 Very Cold	⛔ Very cold	Dec 7
31	Western Run At Western Run, Md Lake	—	—	—	—	—
32	Little Seneca Creek Tributary Near Germantown, Md River	—	—	—	—	—
33	Beaver Run Near Finksburg, Md Lake	—	—	—	—	—
34	Paint Branch Tributary Near Colesville, Md Lake	—	—	—	—	—
35	Ches Bay At Mouth Of Susq R At Havre De Grace, Md Lake	—	—	—	—	—
36	Gwynns Falls At Washington Blvd At Baltimore, Md Lake	—	—	—	—	—
37	Youghiogheny River Near Swallow Falls Park, Md River	—	—	—	—	—
38	Pocomoke River Near Willards, Md River	—	—	—	—	—
39	Patuxent River Near Laurel, Md River	—	—	—	—	—
40	North Branch Potomac River At Steyer, Md River	—	—	—	—	—
41	Swan Creek At Swan Creek, Md River	—	—	—	—	—
42	Town Creek Near Oldtown, Md River	—	—	—	—	—
43	Gunpowder Falls At Hoffmanville, Md Lake	—	—	—	—	—
44	Antietam Creek Near Waynesboro, Pa River	—	—	—	—	—
45	Little Falls At Blue Mount, Md Lake	—	—	—	—	—
46	Big Pipe Creek At Bruceville, Md River	—	—	—	—	—
47	Minebank Run Near Glen Arm, Md Lake	—	—	—	—	—
48	East Branch Herbert Run At Arbutus, Md Lake	—	—	—	—	—
49	Little Deer Creek Reservoir Near Shawsville, Md Lake	—	—	—	—	—
50	Tributary To Dead Run Tributary At Woodlawn, Md Lake	—	—	—	—	—
51	St Clements Creek Near Clements, Md River	—	—	—	—	—
52	Mcintosh Run Near Leonardtown, Md Lake	—	—	—	—	—
53	Cattail Creek Near Glenwood, Md River	—	—	—	—	—
54	Tuckahoe Creek Near Ruthsburg, Md River	—	—	—	—	—
55	Patuxent River Near Bowie, Md River	—	—	—	—	—
56	Georges Creek At Franklin, Md River	—	—	—	—	—
57	Winters Run Near Bel Air, Md Lake	—	—	—	—	—
58	Licking Creek At Pectonville, Md River	—	—	—	—	—
59	Catoctin Creek Near Middletown, Md River	—	—	—	—	—
60	Baisman Run At Broadmoor, Md Lake	—	—	—	—	—
61	Monocacy River At Jug Bridge Near Frederick, Md River	—	—	—	—	—
62	Whitemarsh Run At White Marsh, Md Lake	—	—	—	—	—
63	Tenmile Creek Near Clarksburg, Md River	—	—	—	—	—
64	Patapsco River At Hollofield, Md River	—	—	—	—	—
65	Dead Run Near Catonsville, Md Lake	—	—	—	—	—
66	Potomac River At Harpers Ferry, Wv River	—	—	—	—	—
67	Sawmill Creek At Glen Burnie, Md River	—	—	—	—	—
68	Manokin Branch Near Princess Anne, Md Lake	—	—	—	—	—
69	L Pax Riv Trib Above Lake Elkhorn Nr Guilford, Md Lake	—	—	—	—	—
70	Big Elk Creek At Elk Mills, Md River	—	—	—	—	—
71	Bynum Run Near Abingdon, Md Lake	—	—	—	—	—
72	Sideling Hill Creek Near Bellegrove, Md River	—	—	—	—	—
73	Georges Run Near Beckleysville, Md Lake	—	—	—	—	—
74	Piney Run At Dover, Md Lake	—	—	—	—	—
75	Monocacy River At Monocacy Blvd At Frederick, Md River	—	—	—	—	—
76	Little Gunpowder Falls At Laurel Brook, Md River	—	—	—	—	—
77	Little Seneca Creek Tributary At Brink, Md River	—	—	—	—	—
78	North Branch Patapsco River At Cedarhurst, Md River	—	—	—	—	—
79	Turkey Branch Near Rockville, Md Lake	—	—	—	—	—
80	Red Run Near Owings Mills, Md Lake	—	—	—	—	—
81	Deer Creek At Eden Mill Dam Near Pylesville, Md River	—	—	—	—	—
82	Dead Run At Franklintown, Md Lake	—	—	—	—	—
83	Youghiogheny River Near Oakland, Md River	—	—	—	—	—
84	Birch Branch At Showell, Md Lake	—	—	—	—	—
85	Hawlings River Near Sandy Spring, Md River	—	—	—	—	—
86	Casselman River At Grantsville, Md River	—	—	—	—	—
87	Unicorn Branch Near Millington, Md Lake	—	—	—	—	—
88	Western Branch At Upper Marlboro, Md Lake	—	—	—	—	—
89	Deer Creek Near Darlington, Md River	—	—	—	—	—
90	North Branch Potomac River Near Cumberland, Md River	—	—	—	—	—
91	Wheel Creek Near Abingdon, Md River	—	—	—	—	—
92	Marsh Run At Grimes, Md Lake	—	—	—	—	—
93	Beetree Run At Bentley Springs, Md Lake	—	—	—	—	—
94	Monocacy River At Bridgeport, Md River	—	—	—	—	—
95	Long Quarter Branch At Lutherville, Md Lake	—	—	—	—	—
96	Bennett Creek At Park Mills, Md River	—	—	—	—	—
97	West Branch Herring Run At Idlewylde, Md Lake	—	—	—	—	—
98	Seneca Creek At Dawsonville, Md River	—	—	—	—	—
99	Patapsco River Near Elkridge, Md River	—	—	—	—	—
100	Pearce Creek At Crystal Beach, Md Lake	—	—	—	—	—

Susquehanna River Near Darlington, Md River

83.7°F

☀️ Warm

Potomac River At Point Of Rocks, Md River

80.8°F

☀️ Warm

Monocacy River Near Dickerson, Md River

79°F

☀️ Warm

Northwest Branch Anacostia River At Brentwood, Md River

78.8°F

☀️ Warm

Northeast Branch Anacostia River At Riverdale, Md River

76.1°F

☀️ Warm

Beaverdam Creek Near Cheverly, Md River

76.1°F

☀️ Warm

Potomac River Near Wash, Dc Little Falls Pump Sta River

75.6°F

☀️ Warm

Patuxent R At Gov Bridge Natural Area Nr Bowie Md Lake

75.4°F

☀️ Warm

Deep Creek Lake Near Thayerville, Md River

75°F

☀️ Warm

Sams Creek At Mckinstrys Mill, Md River

73.9°F

🌤️ Comfortable

Mattawoman Creek Near Pomonkey, Md River

72.9°F

🌤️ Comfortable

Paint Branch Near College Park, Md Lake

72°F

🌤️ Comfortable

Foster Branch Near Joppatowne, Md Lake

70.3°F

🌤️ Comfortable

Plumtree Run Near Bel Air, Md Lake

70.3°F

🌤️ Comfortable

Scotts Level Branch At Rockdale, Md Lake

70°F

🌤️ Comfortable

Patuxent River Below Brighton Dam Near Brighton Md River

69.8°F

🌤️ Comfortable

Herring Run At Sinclair Lane At Baltimore, Md Lake

69.1°F

🌤️ Comfortable

Youghiogheny River At Friendsville, Md River

68.9°F

🌤️ Comfortable

Savage River Near Barton, Md River

67.5°F

🌤️ Comfortable

Choptank River Near Greensboro, Md River

65.7°F

🌤️ Comfortable

More Maryland Resources

🗺️ Maryland Water Levels 🎣 Weekly Fishing Report ⛵ Boat Ramp Status 🌵 Drought Conditions 🌡️ All States

❓ Maryland Water Temperature FAQ

What is the warmest lake in Maryland today?

Based on our latest USGS data, Susquehanna River Near Darlington, Md is currently the warmest water body in Maryland at 83.7°F.

Which Maryland lakes are good for swimming right now?

Lakes with water temperatures above 72°F are generally comfortable for swimming. Currently, Maryland's average water temperature is 66.8°F — check individual lakes above for specific conditions.

What is the best water temperature for fishing in Maryland?

The optimal temperature range depends on your target species. For bass fishing, look for water bodies between 65–75°F. For trout, target the coldest water bodies in Maryland — typically 50–65°F. Use the table above to identify which lakes are in the ideal range for your target species.

🔬 Data Methodology & Sources

Water temperature readings on this site are collected from USGS (United States Geological Survey) monitoring stations installed at lakes, rivers, and reservoirs across the country. Sensors measure water surface temperature in Celsius, which is converted to Fahrenheit for display. Data is retrieved and stored daily. Temperatures shown reflect the most recent available sensor reading for each water body, typically from the past 1–30 days depending on station reporting frequency.

⚠️ Water temperatures can vary significantly across a water body due to depth, currents, and time of day. Sensor readings represent conditions at the monitoring station location. Always exercise caution when swimming and consult local authorities for official safety advisories.