Live readings · updated daily
Water temperature in Connecticut
The latest readings from USGS real-time water sensors across Connecticut, warmest first. Snapshot updated August 21, 2026.
Warmest sensor reading right now
78°F26°C
USGS gauge CONNECTICUT RIVER AT ESSEX, CT · as of 9 hrs ago
All reporting stations (warmest 50 of 81)
| Station | Water temp | Streamflow | Gage height | Observed |
|---|---|---|---|---|
| CONNECTICUT RIVER AT ESSEX, CTUSGS gauge | 78°F26°C | — | 2.30 ft | 9 hrs ago |
| CONNECTICUT RIVER AT MIDDLE HADDAM, CTUSGS gauge | 78°F25°C | 2,100 ft³/s | 1.86 ft | 9 hrs ago |
| CONNECTICUT RIVER AT OLD LYME, CTUSGS gauge | 77°F25°C | — | 2.35 ft | 9 hrs ago |
| CONNECTICUT RIVER AT THOMPSONVILLE, CTUSGS gauge | 77°F25°C | 5,990 ft³/s | 8.11 ft | 9 hrs ago |
| POQUONNOCK RIVER AT BLUFF POINT STATE PARK, CTUSGS gauge | 77°F25°C | — | — | 9 hrs ago |
| SAUGATUCK RIVER US RTE 136 NEAR SAUGATUCK, CTUSGS gauge | 75°F24°C | — | — | 9 hrs ago |
| NORWALK HARBOR AT THE COVE MARINA NR E NORWALK, CTUSGS gauge | 75°F24°C | — | — | 9 hrs ago |
| HOUSATONIC RIVER NR NELLS ISLAND NR STRATFORD, CTUSGS gauge | 75°F24°C | — | — | 9 hrs ago |
| NORWALK R AT MARITIME AQUARIUM NR S NORWALK, CTUSGS gauge | 70°F21°C | — | — | 9 hrs ago |
| NORTH BRANCH PARK RIVER AT HARTFORD, CTUSGS gauge | 69°F21°C | 33 ft³/s | 1.96 ft | 9 hrs ago |
| EAST BRANCH EIGHTMILE RIVER NEAR NORTH LYME, CTUSGS gauge | 67°F20°C | 93 ft³/s | 2.73 ft | 8 hrs ago |
| WEST BRANCH FARMINGTON RIVER AT RIVERTON, CTUSGS gauge | 50°F10°C | 177 ft³/s | 3.88 ft | 9 hrs ago |
| ASPETUCK RIVER AT ASPETUCK, CTUSGS gauge | — | 192 ft³/s | 3.85 ft | 9 hrs ago |
| BRIDE BROOK NR EAST LYME, CTUSGS gauge | — | 4 ft³/s | 1.84 ft | 8 hrs ago |
| BROAD BROOK AT BROAD BROOK, CTUSGS gauge | — | 15 ft³/s | 0.61 ft | 9 hrs ago |
| BUNNELL BROOK NEAR BURLINGTON, CTUSGS gauge | — | 5 ft³/s | 2.27 ft | 9 hrs ago |
| BYRAM RIVER AT PEMBERWICK, CTUSGS gauge | — | 99 ft³/s | 2.56 ft | 9 hrs ago |
| COGINCHAUG RIVER AT MIDDLEFIELD, CTUSGS gauge | — | 57 ft³/s | 5.72 ft | 9 hrs ago |
| CONNECTICUT RIVER AT HARTFORD, CTUSGS gauge | — | — | 1.79 ft | 9 hrs ago |
| EIGHTMILE RIVER AT NORTH PLAIN, CTUSGS gauge | — | 74 ft³/s | 3.50 ft | 9 hrs ago |
| FARM RIVER AT TOTOKET ROAD AT TOTOKET, CTUSGS gauge | — | 110 ft³/s | 7.05 ft | 9 hrs ago |
| FARMINGTON R AT RAINBOW, CT.USGS gauge | — | — | 63.05 ft | 9 hrs ago |
| FARMINGTON RIVER AT TARIFFVILLE, CTUSGS gauge | — | 401 ft³/s | 1.37 ft | 9 hrs ago |
| FARMINGTON RIVER AT UNIONVILLE, CTUSGS gauge | — | 253 ft³/s | 5.05 ft | 9 hrs ago |
| FENTON RIVER AT MANSFIELD, CTUSGS gauge | — | 8 ft³/s | 3.29 ft | 9 hrs ago |
| FIVEMILE RIVER NEAR NEW CANAAN, CTUSGS gauge | — | 3 ft³/s | 2.20 ft | 9 hrs ago |
| FRENCH RIVER AT NORTH GROSVENORDALE, CTUSGS gauge | — | 21 ft³/s | 6.56 ft | 9 hrs ago |
| HOCKANUM RIVER NEAR EAST HARTFORD, CTUSGS gauge | — | 113 ft³/s | 2.55 ft | 9 hrs ago |
| HONEYPOT BROOK AT CREAMERY ROAD AT CHESHIRE, CTUSGS gauge | — | 31 ft³/s | 4.02 ft | 9 hrs ago |
| HOP BROOK NEAR NAUGATUCK, CTUSGS gauge | — | 246 ft³/s | 3.12 ft | 9 hrs ago |
| HOUSATONIC R. AT BEACON PT MARINA NEAR SHELTON, CTUSGS gauge | — | — | 2.48 ft | 9 hrs ago |
| HOUSATONIC RIVER AT FALLS VILLAGE, CTUSGS gauge | — | 355 ft³/s | 2.27 ft | 9 hrs ago |
| HOUSATONIC RIVER AT GAYLORDSVILLE, CTUSGS gauge | — | 668 ft³/s | 2.50 ft | 9 hrs ago |
| HOUSATONIC RIVER AT STEVENSON, CTUSGS gauge | — | 4,210 ft³/s | 6.85 ft | 9 hrs ago |
| HOUSATONIC RIVER NEAR NEW MILFORD, CTUSGS gauge | — | 787 ft³/s | 8.87 ft | 9 hrs ago |
| HUBBARD RIVER NEAR WEST HARTLAND, CTUSGS gauge | — | 2 ft³/s | 0.19 ft | 9 hrs ago |
| INDIAN RIVER NEAR CLINTON, CTUSGS gauge | — | 17 ft³/s | 2.20 ft | 8 hrs ago |
| LITTLE RIVER AT HARRISVILLE, CTUSGS gauge | — | 7 ft³/s | 1.40 ft | 9 hrs ago |
| LITTLE RIVER NEAR HANOVER, CTUSGS gauge | — | 10 ft³/s | 1.45 ft | 9 hrs ago |
| MILL RIVER NEAR FAIRFIELD, CTUSGS gauge | — | 160 ft³/s | 2.04 ft | 9 hrs ago |
| MILL RIVER NEAR HAMDEN, CTUSGS gauge | — | 145 ft³/s | 1.91 ft | 9 hrs ago |
| MOUNT HOPE RIVER NEAR WARRENVILLE, CTUSGS gauge | — | 9 ft³/s | 1.17 ft | 9 hrs ago |
| MUDDY RIVER NEAR EAST WALLINGFORD, CTUSGS gauge | — | 43 ft³/s | 2.08 ft | 9 hrs ago |
| NATCHAUG RIVER AT MARCY RD. NEAR CHAPLIN, CTUSGS gauge | — | 10 ft³/s | 2.14 ft | 9 hrs ago |
| NATCHAUG RIVER AT WILLIMANTIC, CTUSGS gauge | — | 93 ft³/s | 1.81 ft | 9 hrs ago |
| NAUGATUCK RIVER AT BEACON FALLS, CTUSGS gauge | — | 1,200 ft³/s | 3.74 ft | 9 hrs ago |
| NAUGATUCK RIVER AT THOMASTON, CTUSGS gauge | — | 94 ft³/s | 2.14 ft | 9 hrs ago |
| NAUGATUCK RIVER AT WATERBURY, CTUSGS gauge | — | 216 ft³/s | 7.28 ft | 9 hrs ago |
| NEPAUG R NR NEPAUG, CT.USGS gauge | — | 8 ft³/s | 3.33 ft | 8 hrs ago |
| NONEWAUG RIVER AT MINORTOWN, CTUSGS gauge | — | 60 ft³/s | 3.69 ft | 8 hrs ago |
Station links open the official monitoring page with charts and history.
About these readings
Readings come from USGS real-time monitoring stations — 12 sensors are currently reporting a water temperature in Connecticut. 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.