Connecticut River Levels & Streamflow
As of Oct 17, 2026, Connecticut rivers are running at 75% of normal across 55 USGS gauges — the highest is 11,200 cfs on the Connecticut River At Thompsonville. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Connecticut.
Connecticut river map
See Connecticut’s rivers on a live map
Every gauge, river and reservoir, one tap each:
- Rivers now — which are running high or low
- Reservoirs — how full each one is vs normal
- Rain — past 24 hrs and the 72-hr forecast, press play
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Connecticut river conditions today
Where rivers are running versus normal, what’s spiking and what’s coming — refreshed daily from USGS and NOAA.
Streamflow levels across Connecticut are currently 75% of normal, with the Connecticut River At Thompsonville reporting the highest discharge in the state at 11,200 cfs and a gauge stage of 8.70 ft.
Meanwhile, the Connecticut River At Thompsonville is seeing a spike today — up 145% 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.
How Connecticut’s rivers compare to normal
Every gauge placed by its own percent of normal, and three years of the statewide trend.
Where every gauge actually sits
One dot per Connecticut streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
Connecticut streamflow, three water years
Statewide percent of normal, every day since Oct 2023. The dotted line is normal.
799 daily readings from 55 reporting gauges. Percent of normal is today's statewide discharge against the historical average for the same calendar day — 100% is normal, not "good". The axis tops out at 250%: 22 readings above that — including the 421% peak in Dec 2023 — are drawn along the top edge, so a few flood days cannot flatten three years of everything else. The line breaks in 2 places where the record skips more than five days — those are gaps in reporting, not readings of zero.
Connecticut flow report
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Connecticut River At Thompsonville, Ct
1 day ago · USGS 01184000 |
9,630 cfs | 8.55 ft | 60°F | 54°F | 36 ft | Lower Connecticut |
|
Connecticut R At Middle Haddam, Ct
1 day ago · USGS 01193050 |
1,160 cfs | 2.65 ft | 59°F | 48°F | 3 ft | Lower Connecticut |
|
Quinebaug River At Jewett City, Ct
1 day ago · USGS 01127000 |
1,110 cfs | 6.58 ft | · | 51°F | 87 ft | Quinebaug |
|
Housatonic River At Gaylordsville, Ct
1 day ago · USGS 01200500 |
594 cfs | 2.38 ft | · | 53°F | 239 ft | Housatonic |
|
Farmington River At Tariffville, Ct
1 day ago · USGS 01189995 |
522 cfs | 1.60 ft | 72°F | 48°F | 161 ft | Farmington |
|
Housatonic River At Stevenson, Ct
1 day ago · USGS 01205500 |
459 cfs | 2.47 ft | 63°F | 54°F | 38 ft | Housatonic |
|
Shetucket River At Taftville, Ct
1 day ago · USGS 011230695 |
430 cfs | 5.72 ft | · | 52°F | 36 ft | Shetucket |
|
Shetucket River Near Willimantic, Ct
1 day ago · USGS 01122500 |
417 cfs | 2.91 ft | · | 70°F | 156 ft | Shetucket |
|
Housatonic River At Falls Village, Ct
1 day ago · USGS 01199000 |
409 cfs | 2.38 ft | · | 51°F | 536 ft | Housatonic |
|
Farmington River At Unionville, Ct
1 day ago · USGS 01188090 |
299 cfs | 5.19 ft | · | 48°F | 180 ft | Farmington |
|
Quinebaug River At Putnam, Ct
1 day ago · USGS 01125500 |
285 cfs | 3.01 ft | · | 70°F | 229 ft | Quinebaug |
|
Naugatuck River At Beacon Falls, Ct
1 day ago · USGS 01208500 |
231 cfs | 1.75 ft | 68°F | 53°F | 148 ft | Housatonic |
|
Natchaug River At Willimantic, Ct
1 day ago · USGS 01122000 |
173 cfs | 2.34 ft | · | 70°F | 167 ft | Shetucket |
|
Quinebaug R At West Thompson, Ct
1 day ago · USGS 01124151 |
170 cfs | 1.31 ft | · | 70°F | 313 ft | Quinebaug |
|
Quinnipiac River At Wallingford, Ct
1 day ago · USGS 01196500 |
165 cfs | 3.30 ft | 53°F | 53°F | 93 ft | Quinnipiac |
|
West Branch Farmington River At Riverton, Ct
1 day ago · USGS 01186000 |
145 cfs | 3.77 ft | 60°F | 43°F | 508 ft | Farmington |
|
Quinebaug River At Quinebaug, Ct
1 day ago · USGS 01124000 |
141 cfs | 2.83 ft | 73°F | 69°F | 353 ft | Quinebaug |
|
Yantic River At Yantic, Ct
1 day ago · USGS 01127500 |
132 cfs | 2.29 ft | 61°F | 52°F | 123 ft | Thames |
|
Still River At Route 7 At Brookfield Center, Ct
1 day ago · USGS 01201487 |
109 cfs | 7.30 ft | 49°F | 54°F | 268 ft | Housatonic |
|
Saugatuck R Nr Westport, Ct
1 day ago · USGS 01209500 |
102 cfs | 3.73 ft | · | 57°F | 22 ft | Saugatuck |
|
Pomperaug River At Southbury, Ct
1 day ago · USGS 01204000 |
90 cfs | 3.16 ft | · | 53°F | 168 ft | Housatonic |
|
French R At N Grosvenordale, Ct
1 day ago · USGS 01125100 |
88 cfs | 7.02 ft | 63°F | 70°F | 348 ft | Quinebaug |
|
Coginchaug River At Middlefield, Ct
1 day ago · USGS 01192883 |
78 cfs | 5.92 ft | · | 53°F | 147 ft | Lower Connecticut |
|
Salmon River Near East Hampton, Ct
1 day ago · USGS 01193500 |
77 cfs | 2.68 ft | 42°F | 53°F | 82 ft | Lower Connecticut |
|
Hockanum River Near East Hartford, Ct
1 day ago · USGS 01192500 |
68 cfs | 2.04 ft | 56°F | 49°F | 88 ft | Lower Connecticut |
|
Willimantic River Near Coventry, Ct
1 day ago · USGS 01119500 |
67 cfs | 2.86 ft | · | 70°F | 259 ft | Shetucket |
|
Naugatuck River At Thomaston, Ct
1 day ago · USGS 01206900 |
57 cfs | 1.95 ft | · | 52°F | 378 ft | Housatonic |
|
Still River At Robertsville, Ct
1 day ago · USGS 01186500 |
48 cfs | 1.85 ft | 63°F | 44°F | 519 ft | Farmington |
|
Eightmile R At North Plain, Ct
1 day ago · USGS 01194000 |
43 cfs | 3.08 ft | 56°F | 54°F | 69 ft | Lower Connecticut |
|
East Branch Eightmile River Near North Lyme, Ct
1 day ago · USGS 01194500 |
43 cfs | 2.31 ft | 56°F | 55°F | 112 ft | Lower Connecticut |
|
Norwalk R At South Wilton, Ct
1 day ago · USGS 01209700 |
39 cfs | 1.46 ft | · | 56°F | 116 ft | Saugatuck |
|
Mill R Nr Hamden, Ct
1 day ago · USGS 01196620 |
38 cfs | 1.49 ft | · | 54°F | 130 ft | Quinnipiac |
|
Pootatuck R At Sandy Hook, Ct
1 day ago · USGS 01203510 |
35 cfs | 3.63 ft | · | 54°F | 241 ft | Housatonic |
|
Weekeepeemee River At Hotchkissville, Ct
1 day ago · USGS 01203805 |
29 cfs | 2.39 ft | · | 53°F | 254 ft | Housatonic |
|
Saugatuck River Near Redding, Ct
1 day ago · USGS 01208990 |
28 cfs | 1.79 ft | 67°F | 55°F | 282 ft | Saugatuck |
|
Little River Near Hanover, Ct
1 day ago · USGS 01123000 |
28 cfs | 1.77 ft | · | 69°F | 270 ft | Shetucket |
|
Hubbard River Nr. West Hartland, Ct
1 day ago · USGS 01187300 |
24 cfs | 1.14 ft | 64°F | 46°F | 644 ft | Farmington |
|
Little River At Harrisville, Ct
1 day ago · USGS 01125490 |
23 cfs | 1.74 ft | · | 70°F | 274 ft | Quinebaug |
|
Rippowam River At Stamford, Ct
1 day ago · USGS 01209901 |
23 cfs | 1.61 ft | · | 56°F | 26 ft | Saugatuck |
|
Quinnipiac River At Southington, Ct
1 day ago · USGS 01195490 |
20 cfs | 3.18 ft | · | 49°F | 145 ft | Quinnipiac |
|
North Branch Park R At Hartford, Ct
1 day ago · USGS 01191000 |
17 cfs | 1.76 ft | 56°F | 49°F | 59 ft | Lower Connecticut |
|
Salmon Creek At Lime Rock, Ct
1 day ago · USGS 01199050 |
17 cfs | · | · | 51°F | 627 ft | Housatonic |
|
Rooster River At Fairfield, Ct
1 day ago · USGS 01208873 |
16 cfs | 3.50 ft | 51°F | 58°F | 19 ft | Saugatuck |
|
Nonewaug River At Minortown, Ct
1 day ago · USGS 01203600 |
16 cfs | 3.16 ft | · | 53°F | 360 ft | Housatonic |
|
Mount Hope River Near Warrenville, Ct
1 day ago · USGS 01121000 |
15 cfs | 1.38 ft | · | 69°F | 351 ft | Shetucket |
|
Shepaug River At Peters Dam At Woodville, Ct
1 day ago · USGS 01202501 |
12 cfs | 1.41 ft | · | 45°F | 771 ft | Housatonic |
|
Mill R Nr Fairfield, Ct
1 day ago · USGS 01208925 |
12 cfs | · | · | 58°F | 22 ft | Saugatuck |
|
Sasco Brook Near Southport, Ct
1 day ago · USGS 01208950 |
12 cfs | 1.46 ft | · | 58°F | 57 ft | Saugatuck |
|
Pendleton Hill Brook Near Clarks Falls, Ct
1 day ago · USGS 01118300 |
11 cfs | 1.62 ft | · | 52°F | 158 ft | Pawcatuck-Wood |
|
Broad Brook At Broad Brook, Ct
1 day ago · USGS 01184490 |
11 cfs | · | 55°F | 48°F | 56 ft | Lower Connecticut |
|
Indian River Near Clinton, Ct
1 day ago · USGS 01195100 |
6 cfs | 1.85 ft | · | 58°F | 45 ft | Quinnipiac |
|
Ridgefield Brook At Shields Lane Nr Ridgefield, Ct
1 day ago · USGS 012095493 |
5 cfs | 1.92 ft | · | 54°F | 562 ft | Saugatuck |
|
Stony Brook Near West Suffield, Ct
1 day ago · USGS 01184100 |
5 cfs | 1.41 ft | · | 48°F | 173 ft | Lower Connecticut |
|
Burlington Brook Near Burlington, Ct
1 day ago · USGS 01188000 |
4 cfs | 2.17 ft | 58°F | 49°F | 779 ft | Farmington |
|
Fivemile River Near New Canaan, Ct
1 day ago · USGS 01209761 |
0 cfs | 1.86 ft | · | 55°F | 388 ft | Saugatuck |
About Connecticut streamflow
What are river levels like in Connecticut right now?
As of October 17, 2026, Connecticut rivers are running at 75% of normal across 55 USGS streamgauges, and the Connecticut River At Thompsonville is reporting the highest discharge at 11,200 cfs. The full sortable gauge table is below.
Which Connecticut river is running highest right now?
As of October 17, 2026, the highest discharge in Connecticut is 11,200 cfs on the Connecticut River At Thompsonville. See the sortable gauge table for the full statewide ranking.
Are Connecticut rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Connecticut rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
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.