Massachusetts River Levels & Streamflow
As of Sep 13, 2026, Massachusetts rivers are running at 76% of normal across 78 USGS gauges — the highest is 4,120 cfs on the Connecticut R At Interstate 391 Bridge At Holyoke. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Massachusetts.
Streamflow levels across Massachusetts are currently 76% of normal, with the Connecticut R At Interstate 391 Bridge At Holyoke reporting the highest discharge in the state at 4,120 cfs and a gauge stage of 5.12 ft.
Meanwhile, the Connecticut R At Interstate 391 Bridge At Holyoke is seeing a spike today — up 94% 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 Massachusetts's named rivers.
Active weather warnings for Massachusetts
A Flood Watch remains in effect for southeast Massachusetts until 6:00 PM EDT on September 13, with excessive rainfall posing significant flooding risks to low-lying and flood-prone areas. The National Weather Service warns that widespread rainfall of 0.50 to 2 inches is expected, though localized narrow bands could produce 2-4 inches within 3-hour periods, creating potential for flash flooding in vulnerable urban centers. Poor drainage areas and urban locations face the highest risk of inundation. Residents in affected southeastern communities should avoid driving through flooded roadways, monitor drainage-prone areas, and prepare for possible localized flooding through this afternoon.
State-wide streamflow overview
The Massachusetts 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 5.12 ft
Biggest 24h spike
Now 4,120 cfs
Network coverage
USGS gauges feeding 0 named rivers in Massachusetts.
Where every gauge actually sits
One dot per Massachusetts 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.
Massachusetts streamflow, three water years
Statewide percent of normal, every day since Sep 2023. The dotted line is normal.
799 daily readings from 78 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%: 29 readings above that — including the 440% peak in Aug 2026 — 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.
Massachusetts USGS streamgauges
Every USGS gauge Snoflo tracks in Massachusetts. 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 River At Montague City, Ma
13 hours ago · USGS 01170500 |
2,120 cfs | 6.49 ft | · | 60°F | 111 ft | Middle Connecticut |
|
Connecticut R At Interstate 391 Bridge At Holyoke, Ma
12 hours ago · USGS 01172010 |
2,010 cfs | 4.18 ft | · | 60°F | 43 ft | Middle Connecticut |
|
Merrimack River Bl Concord River At Lowell, Ma
13 hours ago · USGS 01100000 |
1,330 cfs | 41.65 ft | · | 71°F | 50 ft | Merrimack |
|
Deerfield River Near West Deerfield, Ma
13 hours ago · USGS 01170000 |
299 cfs | 2.12 ft | · | 59°F | 157 ft | Deerfield |
|
Chicopee River At Indian Orchard, Ma
13 hours ago · USGS 01177000 |
281 cfs | 4.24 ft | · | 75°F | 126 ft | Chicopee |
|
Housatonic River Nr Ashley Falls, Ma
13 hours ago · USGS 01198125 |
202 cfs | 1.65 ft | · | 60°F | 646 ft | Housatonic |
|
Deerfield River At Charlemont, Ma
13 hours ago · USGS 01168500 |
176 cfs | 1.90 ft | · | 58°F | 517 ft | Deerfield |
|
Westfield River Near Westfield, Ma
13 hours ago · USGS 01183500 |
135 cfs | 3.01 ft | · | 60°F | 140 ft | Westfield |
|
Swift River At West Ware, Ma
13 hours ago · USGS 01175500 |
119 cfs | 2.84 ft | · | 73°F | 370 ft | Chicopee |
|
Housatonic River Near Great Barrington, Ma
13 hours ago · USGS 01197500 |
116 cfs | 1.75 ft | · | 59°F | 693 ft | Housatonic |
|
Millers River At Erving, Ma
13 hours ago · USGS 01166500 |
79 cfs | 1.66 ft | · | 58°F | 378 ft | Miller |
|
Hoosic River Near Williamstown, Ma
13 hours ago · USGS 01332500 |
74 cfs | 5.35 ft | · | 58°F | 618 ft | Hudson-Hoosic |
|
Nashua River At East Pepperell, Ma
13 hours ago · USGS 01096500 |
70 cfs | · | · | 71°F | 165 ft | Nashua |
|
Westfield River At Knightville, Ma
13 hours ago · USGS 01179500 |
52 cfs | 2.72 ft | · | 59°F | 464 ft | Westfield |
|
Taunton River Near Bridgewater, Ma
13 hours ago · USGS 01108000 |
49 cfs | 2.90 ft | 62°F | 73°F | 10 ft | Narragansett |
|
Ware River At Gibbs Crossing, Ma
13 hours ago · USGS 01173500 |
45 cfs | 2.04 ft | · | 73°F | 380 ft | Chicopee |
|
Concord R Below R Meadow Brook, Ma
13 hours ago · USGS 01099500 |
44 cfs | 3.72 ft | · | 71°F | 67 ft | Merrimack |
|
Quinebaug R Bl Westville Dam Nr Southbridge, Ma
13 hours ago · USGS 01123600 |
42 cfs | 3.45 ft | · | 73°F | 513 ft | Quinebaug |
|
Quaboag River At West Brimfield, Ma
13 hours ago · USGS 01176000 |
39 cfs | 2.58 ft | · | 73°F | 388 ft | Chicopee |
|
Blackstone River, Ma
12 hours ago · USGS 01109730 |
37 cfs | 1.51 ft | · | 72°F | 382 ft | Blackstone |
|
Hoosic River At Adams, Ma
13 hours ago · USGS 01331500 |
37 cfs | 5.75 ft | · | 58°F | 831 ft | Hudson-Hoosic |
|
North Nashua River Near Leominster, Ma
13 hours ago · USGS 01094500 |
35 cfs | 1.97 ft | · | 72°F | 274 ft | Nashua |
|
Quinebaug R Bl E Brimfield Dam At Fiskdale, Ma
13 hours ago · USGS 01123360 |
31 cfs | 2.55 ft | · | 72°F | 614 ft | Quinebaug |
|
Otter River At Otter River, Ma
13 hours ago · USGS 01163200 |
29 cfs | · | · | 70°F | 901 ft | Miller |
|
West Branch Farmington River Near New Boston, Ma
13 hours ago · USGS 01185500 |
29 cfs | 2.31 ft | · | 58°F | 776 ft | Farmington |
|
North River At Shattuckville, Ma
13 hours ago · USGS 01169000 |
27 cfs | 1.17 ft | · | 59°F | 459 ft | Deerfield |
|
Green River At Williamstown, Ma
13 hours ago · USGS 01333000 |
27 cfs | 1.70 ft | · | 59°F | 614 ft | Hudson-Hoosic |
|
Neponset River At Milton Village, Ma
18 hours ago · USGS 011055566 |
27 cfs | · | · | 72°F | 5 ft | Charles |
|
Charles River At Dover, Ma
13 hours ago · USGS 01103500 |
25 cfs | · | · | 72°F | 93 ft | Charles |
|
Charles River At Waltham, Ma
13 hours ago · USGS 01104500 |
24 cfs | · | · | 72°F | 16 ft | Charles |
|
Assabet River At Maynard, Ma
13 hours ago · USGS 01097000 |
21 cfs | 1.32 ft | · | 72°F | 154 ft | Concord |
|
East Branch Housatonic River At Coltsville, Ma
13 hours ago · USGS 01197000 |
21 cfs | · | · | 58°F | 996 ft | Housatonic |
|
Stony Brook At Rt 20 At Waltham, Ma
13 hours ago · USGS 01104460 |
21 cfs | 5.20 ft | 70°F | 72°F | 87 ft | Charles |
|
Hobbs Bk Below Cambridge Res Nr Kendall Green, Ma
12 hours ago · USGS 01104430 |
19 cfs | 1.20 ft | 72°F | 72°F | 145 ft | Charles |
|
Charles River At Wellesley, Ma
13 hours ago · USGS 01104200 |
19 cfs | 2.71 ft | · | 72°F | 67 ft | Charles |
|
Millers River Near Winchendon, Ma
13 hours ago · USGS 01162000 |
18 cfs | 3.88 ft | · | 58°F | 834 ft | Miller |
|
West Branch Westfield River At Huntington, Ma
13 hours ago · USGS 01181000 |
18 cfs | 2.96 ft | · | 60°F | 391 ft | Westfield |
|
Squannacook River Near West Groton, Ma
12 hours ago · USGS 01096000 |
14 cfs | 1.51 ft | · | 71°F | 246 ft | Nashua |
|
Ware River At Intake Works Near Barre, Ma
13 hours ago · USGS 01173000 |
13 cfs | 3.08 ft | 67°F | 71°F | 639 ft | Chicopee |
|
Aberjona River At Winchester, Ma
12 hours ago · USGS 01102500 |
12 cfs | 7.24 ft | · | 72°F | 14 ft | Charles |
|
Quashnet River At Waquoit Village, Ma
13 hours ago · USGS 011058837 |
11 cfs | 2.02 ft | · | 73°F | 3 ft | Cape Cod |
|
Mill River At Northampton, Ma
13 hours ago · USGS 01171500 |
10 cfs | 5.41 ft | · | 61°F | 205 ft | Middle Connecticut |
|
Green River Near Colrain, Ma
13 hours ago · USGS 01170100 |
10 cfs | 2.45 ft | 61°F | 58°F | 436 ft | Deerfield |
|
Charles River At Medway, Ma
13 hours ago · USGS 01103280 |
10 cfs | · | · | 72°F | 129 ft | Charles |
|
North Nashua River At Fitchburg, Ma
13 hours ago · USGS 01094400 |
9 cfs | 2.12 ft | · | 71°F | 399 ft | Nashua |
|
Sudbury River At Saxonville, Ma
13 hours ago · USGS 01098530 |
9 cfs | 4.07 ft | · | 72°F | 116 ft | Concord |
|
Neponset River At Greenlodge St Near Canton, Ma
13 hours ago · USGS 01105554 |
9 cfs | 6.12 ft | · | 72°F | 46 ft | Charles |
|
Green River Near Great Barrington, Ma
13 hours ago · USGS 01198000 |
9 cfs | · | · | 59°F | 694 ft | Housatonic |
|
Jones River At Kingston, Ma
13 hours ago · USGS 01105870 |
8 cfs | 2.81 ft | · | 73°F | 8 ft | Cape Cod |
|
South River Near Conway, Ma
13 hours ago · USGS 01169900 |
6 cfs | 1.34 ft | · | 59°F | 456 ft | Deerfield |
|
Mother Brook At Dedham, Ma
13 hours ago · USGS 01104000 |
6 cfs | 80.02 ft | · | 73°F | 87 ft | Charles |
|
Threemile River At North Dighton, Ma
12 hours ago · USGS 01109060 |
6 cfs | 1.98 ft | · | 73°F | 12 ft | Narragansett |
|
Shawsheen River Near Wilmington, Ma
13 hours ago · USGS 01100600 |
5 cfs | 1.85 ft | · | 71°F | 95 ft | Merrimack |
|
Indian Head River At Hanover, Ma
13 hours ago · USGS 01105730 |
5 cfs | 1.24 ft | · | 73°F | 8 ft | Cape Cod |
|
Priest Brook Near Winchendon, Ma
13 hours ago · USGS 01162500 |
5 cfs | 2.41 ft | · | 58°F | 852 ft | Miller |
|
Quinapoxet River At Canada Mills Near Holden, Ma
13 hours ago · USGS 01095375 |
4 cfs | 6.29 ft | 63°F | 71°F | 569 ft | Nashua |
|
Ware River Near Barre, Ma
13 hours ago · USGS 01172500 |
4 cfs | 2.22 ft | · | 71°F | 738 ft | Chicopee |
|
East Branch Neponset River At Canton, Ma
13 hours ago · USGS 01105500 |
3 cfs | · | 79°F | 72°F | 80 ft | Charles |
|
Paskamanset River Near South Dartmouth, Ma
13 hours ago · USGS 01105933 |
3 cfs | 8.22 ft | · | 73°F | 29 ft | Cape Cod |
|
Stillwater River Near Sterling, Ma
13 hours ago · USGS 01095220 |
3 cfs | 3.81 ft | 62°F | 71°F | 403 ft | Nashua |
|
Neponset River At Norwood, Ma
13 hours ago · USGS 01105000 |
3 cfs | 5.52 ft | · | 73°F | 51 ft | Charles |
|
West Branch Swift River Near Shutesbury, Ma
13 hours ago · USGS 01174565 |
2 cfs | 1.09 ft | · | 59°F | 536 ft | Chicopee |
|
Quinsigamond River At North Grafton, Ma
12 hours ago · USGS 01110000 |
2 cfs | · | · | 72°F | 349 ft | Blackstone |
|
Herring River At North Harwich, Ma
13 hours ago · USGS 01105880 |
1 cfs | 1.74 ft | · | 74°F | 21 ft | Cape Cod |
|
Saugus R At Saugus Iron Works At Saugus, Ma
12 hours ago · USGS 01102345 |
1 cfs | · | · | 71°F | 14 ft | Charles |
|
Wading River Near Norton, Ma
13 hours ago · USGS 01109000 |
1 cfs | 4.80 ft | · | 72°F | 63 ft | Narragansett |
|
Sevenmile River Near Spencer, Ma
12 hours ago · USGS 01175670 |
1 cfs | 9.13 ft | · | 71°F | 650 ft | Chicopee |
|
Lake Cochituate Outlet At Framingham, Ma
13 hours ago · USGS 01098500 |
1 cfs | · | · | 72°F | 129 ft | Concord |
|
Ipswich River At South Middleton, Ma
13 hours ago · USGS 01101500 |
0 cfs | 1.71 ft | · | 71°F | 49 ft | Charles |
|
Nashoba Brook Near Acton, Ma
13 hours ago · USGS 01097300 |
0 cfs | 3.46 ft | · | 71°F | 155 ft | Concord |
|
Ipswich River Near Ipswich, Ma
12 hours ago · USGS 01102000 |
0 cfs | 2.19 ft | · | 70°F | 21 ft | Charles |
|
East Branch Swift River Near Hardwick, Ma
13 hours ago · USGS 01174500 |
0 cfs | 19.21 ft | · | 72°F | 520 ft | Chicopee |
|
Whitmans Pond Fish Ladder At East Weymouth, Ma
13 hours ago · USGS 01105608 |
0 cfs | 31.13 ft | · | 73°F | 52 ft | Charles |
|
Whitmans Pond, Ma
13 hours ago · USGS 01105606 |
0 cfs | 70.89 ft | · | 73°F | 75 ft | Charles |
|
Parker River At Byfield, Ma
13 hours ago · USGS 01101000 |
0 cfs | · | · | 70°F | 25 ft | Charles |
|
Old Swamp River Near South Weymouth, Ma
13 hours ago · USGS 01105600 |
0 cfs | 2.31 ft | · | 73°F | 87 ft | Cape Cod |
|
Stony Brook Reservoir At Dam Near Waltham, Ma
13 hours ago · USGS 01104480 |
0 cfs | · | 36°F | 72°F | 62 ft | Charles |
|
Segreganset River Near Dighton, Ma
13 hours ago · USGS 01109070 |
0 cfs | 1.52 ft | · | 73°F | 36 ft | Narragansett |
See every Massachusetts gauge ranked against normal.
- Percentile rank & % of median for all 78 gauges
- 15-day PULSE forecast on every gauge
- Custom flow alerts & full daily history
About Massachusetts streamflow
What are river levels like in Massachusetts right now?
As of September 13, 2026, Massachusetts rivers are running at 76% of normal across 78 USGS streamgauges, and the Connecticut R At Interstate 391 Bridge At Holyoke is reporting the highest discharge at 4,120 cfs. The full sortable gauge table is below.
Which Massachusetts river is running highest right now?
As of September 13, 2026, the highest discharge in Massachusetts is 4,120 cfs on the Connecticut R At Interstate 391 Bridge At Holyoke. See the sortable gauge table for the full statewide ranking.
Are Massachusetts rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Massachusetts 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 Massachusetts 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 Massachusetts 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 Massachusetts 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.
Streamflow in every state
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