Connecticut streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Connecticut. Built for paddlers, anglers, water managers, and flood researchers.
Streamflow levels across Connecticut are currently 37% of normal, with the Connecticut R At Middle Haddam reporting the highest discharge in the state at 5,720 cfs and a gauge stage of 3.39 ft.
Meanwhile, the Housatonic River At Stevenson is seeing a spike today — up -1% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Connecticut's named rivers.
State-wide streamflow overview
The Connecticut flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.
Percent of normal
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Gauge stage 3.39 ft
Biggest 24h spike
Now 455 cfs
Network coverage
USGS gauges feeding 0 named rivers in Connecticut.
Connecticut USGS streamgauges
Every USGS gauge Snoflo tracks in Connecticut. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Connecticut R At Middle Haddam, Ct
3 days ago · USGS 01193050 |
5,720 cfs | 2.77 ft | 80°F | 63°F | 3 ft | Lower Connecticut |
|
Connecticut River At Thompsonville, Ct
23 hours ago · USGS 01184000 |
3,880 cfs | 7.75 ft | 80°F | 82°F | 36 ft | Lower Connecticut |
|
Housatonic River At Stevenson, Ct
23 hours ago · USGS 01205500 |
491 cfs | 2.56 ft | 63°F | 80°F | 38 ft | Housatonic |
|
Housatonic River At Gaylordsville, Ct
1 day ago · USGS 01200500 |
356 cfs | 1.93 ft | · | 79°F | 239 ft | Housatonic |
|
Farmington River At Tariffville, Ct
23 hours ago · USGS 01189995 |
256 cfs | 1.03 ft | 72°F | 81°F | 161 ft | Farmington |
|
Housatonic River At Falls Village, Ct
23 hours ago · USGS 01199000 |
232 cfs | 1.98 ft | · | 79°F | 536 ft | Housatonic |
|
Quinebaug River At Jewett City, Ct
23 hours ago · USGS 01127000 |
205 cfs | 4.68 ft | · | 82°F | 87 ft | Quinebaug |
|
Quinebaug R At West Thompson, Ct
23 hours ago · USGS 01124151 |
140 cfs | 1.18 ft | · | 81°F | 313 ft | Quinebaug |
|
Farmington River At Unionville, Ct
23 hours ago · USGS 01188090 |
139 cfs | 4.61 ft | · | 80°F | 180 ft | Farmington |
|
Shetucket River At Taftville, Ct
1 day ago · USGS 011230695 |
135 cfs | 4.77 ft | · | 82°F | 36 ft | Shetucket |
|
West Branch Farmington River At Riverton, Ct
23 hours ago · USGS 01186000 |
119 cfs | 3.67 ft | 46°F | 79°F | 508 ft | Farmington |
|
Quinebaug River At Putnam, Ct
23 hours ago · USGS 01125500 |
109 cfs | 2.27 ft | · | 81°F | 229 ft | Quinebaug |
|
Naugatuck River At Beacon Falls, Ct
23 hours ago · USGS 01208500 |
106 cfs | 1.07 ft | 68°F | 80°F | 148 ft | Housatonic |
|
Shetucket River Near Willimantic, Ct
23 hours ago · USGS 01122500 |
104 cfs | 2.00 ft | · | 81°F | 156 ft | Shetucket |
|
Natchaug River At Willimantic, Ct
23 hours ago · USGS 01122000 |
71 cfs | 1.65 ft | · | 81°F | 167 ft | Shetucket |
|
Quinnipiac River At Wallingford, Ct
1 day ago · USGS 01196500 |
67 cfs | 2.56 ft | 53°F | 82°F | 93 ft | Quinnipiac |
|
Still River At Route 7 At Brookfield Center, Ct
1 day ago · USGS 01201487 |
52 cfs | 6.65 ft | 49°F | 78°F | 268 ft | Housatonic |
|
Hockanum River Near East Hartford, Ct
23 hours ago · USGS 01192500 |
45 cfs | 1.81 ft | 56°F | 82°F | 88 ft | Lower Connecticut |
|
Quinebaug River At Quinebaug, Ct
1 day ago · USGS 01124000 |
41 cfs | 2.40 ft | 73°F | 80°F | 353 ft | Quinebaug |
|
Willimantic River Near Coventry, Ct
23 hours ago · USGS 01119500 |
28 cfs | 2.46 ft | · | 81°F | 259 ft | Shetucket |
|
French R At N Grosvenordale, Ct
23 hours ago · USGS 01125100 |
27 cfs | 6.63 ft | 63°F | 80°F | 348 ft | Quinebaug |
|
Pomperaug River At Southbury, Ct
1 day ago · USGS 01204000 |
26 cfs | 2.56 ft | · | 79°F | 168 ft | Housatonic |
|
Naugatuck River At Thomaston, Ct
23 hours ago · USGS 01206900 |
20 cfs | 1.65 ft | · | 78°F | 378 ft | Housatonic |
|
Shepaug River At Peters Dam At Woodville, Ct
23 hours ago · USGS 01202501 |
20 cfs | 1.77 ft | · | 76°F | 771 ft | Housatonic |
|
Salmon River Near East Hampton, Ct
23 hours ago · USGS 01193500 |
15 cfs | 2.11 ft | 42°F | 81°F | 82 ft | Lower Connecticut |
|
Still River At Robertsville, Ct
23 hours ago · USGS 01186500 |
14 cfs | 1.42 ft | 63°F | 80°F | 519 ft | Farmington |
|
Yantic River At Yantic, Ct
1 day ago · USGS 01127500 |
13 cfs | · | 61°F | 82°F | 123 ft | Thames |
|
Pootatuck R At Sandy Hook, Ct
1 day ago · USGS 01203510 |
12 cfs | 3.02 ft | · | 80°F | 241 ft | Housatonic |
|
Saugatuck R Nr Westport, Ct
1 day ago · USGS 01209500 |
11 cfs | 3.03 ft | · | 81°F | 22 ft | Saugatuck |
|
Norwalk R At South Wilton, Ct
23 hours ago · USGS 01209700 |
11 cfs | 1.14 ft | · | 80°F | 116 ft | Saugatuck |
|
Broad Brook At Broad Brook, Ct
1 day ago · USGS 01184490 |
10 cfs | · | 55°F | 82°F | 56 ft | Lower Connecticut |
|
Quinnipiac River At Southington, Ct
1 day ago · USGS 01195490 |
9 cfs | 2.86 ft | · | 80°F | 145 ft | Quinnipiac |
|
Mill R Nr Hamden, Ct
23 hours ago · USGS 01196620 |
9 cfs | 1.22 ft | · | 81°F | 130 ft | Quinnipiac |
|
Salmon Creek At Lime Rock, Ct
1 day ago · USGS 01199050 |
8 cfs | · | · | 79°F | 627 ft | Housatonic |
|
Little River Near Hanover, Ct
23 hours ago · USGS 01123000 |
8 cfs | 1.36 ft | · | 81°F | 270 ft | Shetucket |
|
Little River At Harrisville, Ct
1 day ago · USGS 01125490 |
7 cfs | 1.41 ft | · | 81°F | 274 ft | Quinebaug |
|
Coginchaug River At Middlefield, Ct
1 day ago · USGS 01192883 |
7 cfs | 4.60 ft | · | 81°F | 147 ft | Lower Connecticut |
|
Saugatuck River Near Redding, Ct
1 day ago · USGS 01208990 |
7 cfs | 1.22 ft | 67°F | 80°F | 282 ft | Saugatuck |
|
Mill R Nr Fairfield, Ct
23 hours ago · USGS 01208925 |
7 cfs | · | · | 80°F | 22 ft | Saugatuck |
|
Weekeepeemee River At Hotchkissville, Ct
23 hours ago · USGS 01203805 |
5 cfs | 2.05 ft | · | 78°F | 254 ft | Housatonic |
|
Rooster River At Fairfield, Ct
23 hours ago · USGS 01208873 |
4 cfs | 3.07 ft | 51°F | 80°F | 19 ft | Saugatuck |
|
Nonewaug River At Minortown, Ct
23 hours ago · USGS 01203600 |
4 cfs | 2.82 ft | · | 79°F | 360 ft | Housatonic |
|
East Branch Eightmile River Near North Lyme, Ct
1 day ago · USGS 01194500 |
4 cfs | 1.53 ft | 70°F | 81°F | 112 ft | Lower Connecticut |
|
Rippowam River At Stamford, Ct
1 day ago · USGS 01209901 |
3 cfs | 1.19 ft | · | 80°F | 26 ft | Saugatuck |
|
Mount Hope River Near Warrenville, Ct
23 hours ago · USGS 01121000 |
3 cfs | · | · | 81°F | 351 ft | Shetucket |
|
North Branch Park R At Hartford, Ct
1 day ago · USGS 01191000 |
3 cfs | 1.39 ft | 72°F | 82°F | 59 ft | Lower Connecticut |
|
Eightmile R At North Plain, Ct
23 hours ago · USGS 01194000 |
2 cfs | 2.49 ft | 56°F | 81°F | 69 ft | Lower Connecticut |
|
Ridgefield Brook At Shields Lane Nr Ridgefield, Ct
23 hours ago · USGS 012095493 |
2 cfs | 1.72 ft | · | 79°F | 562 ft | Saugatuck |
|
Sasco Brook Near Southport, Ct
23 hours ago · USGS 01208950 |
2 cfs | 1.02 ft | · | 80°F | 57 ft | Saugatuck |
|
Hubbard River Nr. West Hartland, Ct
23 hours ago · USGS 01187300 |
2 cfs | · | 64°F | 77°F | 644 ft | Farmington |
|
Burlington Brook Near Burlington, Ct
23 hours ago · USGS 01188000 |
1 cfs | 1.71 ft | 58°F | 77°F | 779 ft | Farmington |
|
Stony Brook Near West Suffield, Ct
1 day ago · USGS 01184100 |
1 cfs | 1.20 ft | · | 81°F | 173 ft | Lower Connecticut |
|
Pendleton Hill Brook Near Clarks Falls, Ct
1 day ago · USGS 01118300 |
1 cfs | 1.08 ft | · | 80°F | 158 ft | Pawcatuck-Wood |
|
Indian River Near Clinton, Ct
1 day ago · USGS 01195100 |
0 cfs | 1.51 ft | · | 80°F | 45 ft | Quinnipiac |
|
Fivemile River Near New Canaan, Ct
1 day ago · USGS 01209761 |
0 cfs | 1.80 ft | · | 79°F | 388 ft | Saugatuck |
See every Connecticut gauge ranked against normal.
- Percentile rank & % of median for all 55 gauges
- 15-day PULSE forecast on every gauge
- Custom flow alerts & full daily history
About Connecticut streamflow
Where does the Connecticut streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Connecticut data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Connecticut gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.