Flow report
Massachusetts streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in Massachusetts. Built for paddlers, anglers, water managers, and flood researchers.
USGS gauges
78
State percent normal
63%
Paddle runs
0
Updated
Jul 15
Open the Massachusetts flow layer on the map
Every USGS streamgauge filtered to Massachusetts.
Open the map →
July
15
2026
Flow briefing
Streamflow levels across Massachusetts are currently 63% of normal, with the Connecticut R At Interstate 391 Bridge At Holyoke reporting the highest discharge in the state at 4,580 cfs and a gauge stage of 5.31 ft.
Meanwhile, the Deerfield River At Charlemont is seeing a spike today — up 20% 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.
River levels near Massachusetts towns
Active weather warnings for Massachusetts
# Massachusetts Natural Disaster Alert Summary
Massachusetts residents are urged to take precautions due to multiple air quality alerts issued July 15th affecting the entire state through Thursday noon. Fine particulate concentrations and ground-level ozone are expected to reach unhealthy levels for sensitive groups, including children, older adults, and those with asthma, lung, or heart disease. Sensitive individuals should limit prolonged outdoor activities. Additionally, dangerous rip currents pose a threat to beachgoers in coastal counties including Barnstable, Plymouth, Bristol, and Nantucket through this evening. For real-time air quality updates, visit mass.gov/dep/massair/forecast. Monitor local forecasts for additional hazards as conditions develop.
Massachusetts residents are urged to take precautions due to multiple air quality alerts issued July 15th affecting the entire state through Thursday noon. Fine particulate concentrations and ground-level ozone are expected to reach unhealthy levels for sensitive groups, including children, older adults, and those with asthma, lung, or heart disease. Sensitive individuals should limit prolonged outdoor activities. Additionally, dangerous rip currents pose a threat to beachgoers in coastal counties including Barnstable, Plymouth, Bristol, and Nantucket through this evening. For real-time air quality updates, visit mass.gov/dep/massair/forecast. Monitor local forecasts for additional hazards as conditions develop.
Massachusetts at a glance
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
63%
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Connecticut R At Interstate 391 Bridge At Holyoke
4,580 cfs
Gauge stage 5.31 ft
Biggest 24h spike
Deerfield River At Charlemont
+20%
Now 244 cfs
Network coverage
Gauges + rivers tracked
78 + 0
USGS gauges feeding 0 named rivers in Massachusetts.
Full streamgauge inventory
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 R At Interstate 391 Bridge At Holyoke, Ma
13 hours ago · USGS 01172010 |
4,080 cfs | 5.10 ft | · | 90°F | 43 ft | Middle Connecticut |
|
Connecticut River At Montague City, Ma
13 hours ago · USGS 01170500 |
2,610 cfs | 6.86 ft | · | 75°F | 111 ft | Middle Connecticut |
|
Merrimack River Bl Concord River At Lowell, Ma
13 hours ago · USGS 01100000 |
1,710 cfs | 41.88 ft | · | 77°F | 50 ft | Merrimack |
|
Deerfield River Near West Deerfield, Ma
13 hours ago · USGS 01170000 |
904 cfs | 2.89 ft | · | 86°F | 157 ft | Deerfield |
|
Deerfield River At Charlemont, Ma
13 hours ago · USGS 01168500 |
737 cfs | 2.88 ft | · | 72°F | 517 ft | Deerfield |
|
Housatonic River Nr Ashley Falls, Ma
13 hours ago · USGS 01198125 |
239 cfs | 2.03 ft | · | 91°F | 646 ft | Housatonic |
|
Chicopee River At Indian Orchard, Ma
13 hours ago · USGS 01177000 |
238 cfs | 4.14 ft | · | 90°F | 126 ft | Chicopee |
|
Housatonic River Near Great Barrington, Ma
13 hours ago · USGS 01197500 |
170 cfs | 1.93 ft | · | 89°F | 693 ft | Housatonic |
|
Concord R Below R Meadow Brook, Ma
13 hours ago · USGS 01099500 |
157 cfs | 4.25 ft | · | 77°F | 67 ft | Merrimack |
|
Westfield River Near Westfield, Ma
13 hours ago · USGS 01183500 |
135 cfs | 3.16 ft | · | 91°F | 140 ft | Westfield |
|
Nashua River At East Pepperell, Ma
13 hours ago · USGS 01096500 |
96 cfs | · | · | 77°F | 165 ft | Nashua |
|
Charles River At Dover, Ma
14 hours ago · USGS 01103500 |
90 cfs | · | · | 88°F | 93 ft | Charles |
|
Taunton River Near Bridgewater, Ma
14 hours ago · USGS 01108000 |
84 cfs | 3.21 ft | 62°F | 90°F | 10 ft | Narragansett |
|
Neponset River At Milton Village, Ma
14 hours ago · USGS 011055566 |
79 cfs | 1.31 ft | · | 89°F | 5 ft | Charles |
|
Hoosic River Near Williamstown, Ma
13 hours ago · USGS 01332500 |
78 cfs | 5.36 ft | · | 87°F | 618 ft | Hudson-Hoosic |
|
Millers River At Erving, Ma
13 hours ago · USGS 01166500 |
72 cfs | 1.59 ft | · | 86°F | 378 ft | Miller |
|
Charles River At Waltham, Ma
13 hours ago · USGS 01104500 |
69 cfs | 1.02 ft | · | 78°F | 16 ft | Charles |
|
Quaboag River At West Brimfield, Ma
13 hours ago · USGS 01176000 |
65 cfs | 2.73 ft | · | 86°F | 388 ft | Chicopee |
|
Ware River At Gibbs Crossing, Ma
13 hours ago · USGS 01173500 |
60 cfs | 2.07 ft | · | 86°F | 380 ft | Chicopee |
|
Charles River At Wellesley, Ma
13 hours ago · USGS 01104200 |
59 cfs | 2.90 ft | · | 78°F | 67 ft | Charles |
|
Blackstone River, Ma
13 hours ago · USGS 01109730 |
56 cfs | 1.70 ft | · | 86°F | 382 ft | Blackstone |
|
Westfield River At Knightville, Ma
13 hours ago · USGS 01179500 |
55 cfs | 2.74 ft | · | 86°F | 464 ft | Westfield |
|
Swift River At West Ware, Ma
13 hours ago · USGS 01175500 |
49 cfs | 2.19 ft | · | 87°F | 370 ft | Chicopee |
|
Quinebaug R Bl Westville Dam Nr Southbridge, Ma
13 hours ago · USGS 01123600 |
47 cfs | 3.51 ft | · | 85°F | 513 ft | Quinebaug |
|
North Nashua River Near Leominster, Ma
13 hours ago · USGS 01094500 |
47 cfs | 2.03 ft | · | 77°F | 274 ft | Nashua |
|
Hoosic River At Adams, Ma
14 hours ago · USGS 01331500 |
38 cfs | 5.80 ft | · | 88°F | 831 ft | Hudson-Hoosic |
|
Assabet River At Maynard, Ma
13 hours ago · USGS 01097000 |
36 cfs | 1.53 ft | · | 77°F | 154 ft | Concord |
|
Mother Brook At Dedham, Ma
13 hours ago · USGS 01104000 |
35 cfs | 80.66 ft | · | 89°F | 87 ft | Charles |
|
Ipswich River Near Ipswich, Ma
13 hours ago · USGS 01102000 |
32 cfs | 2.98 ft | · | 78°F | 21 ft | Charles |
|
Quinebaug R Bl E Brimfield Dam At Fiskdale, Ma
13 hours ago · USGS 01123360 |
32 cfs | 2.49 ft | · | 85°F | 614 ft | Quinebaug |
|
North River At Shattuckville, Ma
13 hours ago · USGS 01169000 |
31 cfs | 1.39 ft | · | 74°F | 459 ft | Deerfield |
|
Charles River At Medway, Ma
14 hours ago · USGS 01103280 |
25 cfs | · | · | 88°F | 129 ft | Charles |
|
East Branch Housatonic River At Coltsville, Ma
13 hours ago · USGS 01197000 |
24 cfs | · | · | 87°F | 996 ft | Housatonic |
|
West Branch Westfield River At Huntington, Ma
13 hours ago · USGS 01181000 |
24 cfs | 3.08 ft | · | 87°F | 391 ft | Westfield |
|
West Branch Farmington River Near New Boston, Ma
13 hours ago · USGS 01185500 |
24 cfs | 2.29 ft | · | 89°F | 776 ft | Farmington |
|
Neponset River At Greenlodge St Near Canton, Ma
13 hours ago · USGS 01105554 |
24 cfs | 6.58 ft | · | 88°F | 46 ft | Charles |
|
Threemile River At North Dighton, Ma
13 hours ago · USGS 01109060 |
22 cfs | 2.37 ft | · | 90°F | 12 ft | Narragansett |
|
Paskamanset River Near South Dartmouth, Ma
13 hours ago · USGS 01105933 |
22 cfs | 8.77 ft | · | 88°F | 29 ft | Cape Cod |
|
Green River At Williamstown, Ma
13 hours ago · USGS 01333000 |
21 cfs | 1.60 ft | · | 88°F | 614 ft | Hudson-Hoosic |
|
Stony Brook At Rt 20 At Waltham, Ma
13 hours ago · USGS 01104460 |
20 cfs | 5.18 ft | 77°F | 78°F | 87 ft | Charles |
|
Ware River At Intake Works Near Barre, Ma
13 hours ago · USGS 01173000 |
19 cfs | 3.20 ft | 76°F | 86°F | 639 ft | Chicopee |
|
Hobbs Bk Below Cambridge Res Nr Kendall Green, Ma
13 hours ago · USGS 01104430 |
19 cfs | 1.18 ft | 77°F | 78°F | 145 ft | Charles |
|
Quashnet River At Waquoit Village, Ma
13 hours ago · USGS 011058837 |
17 cfs | 2.14 ft | · | 81°F | 3 ft | Cape Cod |
|
Indian Head River At Hanover, Ma
13 hours ago · USGS 01105730 |
15 cfs | 1.52 ft | · | 89°F | 8 ft | Cape Cod |
|
Green River Near Great Barrington, Ma
13 hours ago · USGS 01198000 |
14 cfs | · | · | 90°F | 694 ft | Housatonic |
|
Shawsheen River Near Wilmington, Ma
13 hours ago · USGS 01100600 |
14 cfs | 2.21 ft | · | 78°F | 95 ft | Merrimack |
|
Green River Near Colrain, Ma
13 hours ago · USGS 01170100 |
14 cfs | 2.55 ft | 42°F | 74°F | 436 ft | Deerfield |
|
Squannacook River Near West Groton, Ma
13 hours ago · USGS 01096000 |
13 cfs | 1.46 ft | · | 76°F | 246 ft | Nashua |
|
Jones River At Kingston, Ma
13 hours ago · USGS 01105870 |
12 cfs | 2.92 ft | · | 89°F | 8 ft | Cape Cod |
|
Millers River Near Winchendon, Ma
13 hours ago · USGS 01162000 |
11 cfs | 3.78 ft | · | 73°F | 834 ft | Miller |
|
Mill River At Northampton, Ma
13 hours ago · USGS 01171500 |
11 cfs | 5.43 ft | · | 89°F | 205 ft | Middle Connecticut |
|
Otter River At Otter River, Ma
13 hours ago · USGS 01163200 |
11 cfs | · | · | 73°F | 901 ft | Miller |
|
North Nashua River At Fitchburg, Ma
13 hours ago · USGS 01094400 |
10 cfs | 2.15 ft | · | 76°F | 399 ft | Nashua |
|
Quinsigamond River At North Grafton, Ma
13 hours ago · USGS 01110000 |
9 cfs | 1.07 ft | · | 77°F | 349 ft | Blackstone |
|
Sudbury River At Saxonville, Ma
13 hours ago · USGS 01098530 |
9 cfs | 4.17 ft | · | 87°F | 116 ft | Concord |
|
South River Near Conway, Ma
13 hours ago · USGS 01169900 |
9 cfs | 1.40 ft | · | 86°F | 456 ft | Deerfield |
|
Wading River Near Norton, Ma
13 hours ago · USGS 01109000 |
9 cfs | 5.18 ft | · | 90°F | 63 ft | Narragansett |
|
Aberjona River At Winchester, Ma
13 hours ago · USGS 01102500 |
8 cfs | 7.08 ft | · | 79°F | 14 ft | Charles |
|
Ware River Near Barre, Ma
14 hours ago · USGS 01172500 |
8 cfs | 2.41 ft | · | 84°F | 738 ft | Chicopee |
|
Ipswich River At South Middleton, Ma
13 hours ago · USGS 01101500 |
7 cfs | 2.05 ft | · | 78°F | 49 ft | Charles |
|
Neponset River At Norwood, Ma
13 hours ago · USGS 01105000 |
7 cfs | 5.66 ft | · | 89°F | 51 ft | Charles |
|
Saugus R At Saugus Iron Works At Saugus, Ma
13 hours ago · USGS 01102345 |
6 cfs | 1.41 ft | · | 79°F | 14 ft | Charles |
|
East Branch Swift River Near Hardwick, Ma
13 hours ago · USGS 01174500 |
6 cfs | 19.35 ft | · | 85°F | 520 ft | Chicopee |
|
East Branch Neponset River At Canton, Ma
13 hours ago · USGS 01105500 |
6 cfs | · | 79°F | 89°F | 80 ft | Charles |
|
Lake Cochituate Outlet At Framingham, Ma
13 hours ago · USGS 01098500 |
5 cfs | 2.16 ft | · | 88°F | 129 ft | Concord |
|
Quinapoxet River At Canada Mills Near Holden, Ma
13 hours ago · USGS 01095375 |
4 cfs | 6.34 ft | 74°F | 85°F | 569 ft | Nashua |
|
Stillwater River Near Sterling, Ma
13 hours ago · USGS 01095220 |
4 cfs | 3.86 ft | 71°F | 76°F | 403 ft | Nashua |
|
Herring River At North Harwich, Ma
22 hours ago · USGS 01105880 |
3 cfs | 1.93 ft | · | 78°F | 21 ft | Cape Cod |
|
Priest Brook Near Winchendon, Ma
14 hours ago · USGS 01162500 |
3 cfs | 2.33 ft | · | 73°F | 852 ft | Miller |
|
Parker River At Byfield, Ma
13 hours ago · USGS 01101000 |
3 cfs | · | · | 77°F | 25 ft | Charles |
|
Nashoba Brook Near Acton, Ma
14 hours ago · USGS 01097300 |
2 cfs | 3.44 ft | · | 76°F | 155 ft | Concord |
|
West Branch Swift River Near Shutesbury, Ma
13 hours ago · USGS 01174565 |
2 cfs | 1.08 ft | · | 86°F | 536 ft | Chicopee |
|
Whitmans Pond, Ma
13 hours ago · USGS 01105606 |
1 cfs | 71.92 ft | · | 88°F | 75 ft | Charles |
|
Whitmans Pond Fish Ladder At East Weymouth, Ma
14 hours ago · USGS 01105608 |
1 cfs | 31.35 ft | · | 88°F | 52 ft | Charles |
|
Sevenmile River Near Spencer, Ma
13 hours ago · USGS 01175670 |
1 cfs | 9.18 ft | · | 85°F | 650 ft | Chicopee |
|
Segreganset River Near Dighton, Ma
14 hours ago · USGS 01109070 |
0 cfs | 1.65 ft | · | 90°F | 36 ft | Narragansett |
|
Old Swamp River Near South Weymouth, Ma
13 hours ago · USGS 01105600 |
0 cfs | 2.44 ft | · | 88°F | 87 ft | Cape Cod |
|
Stony Brook Reservoir At Dam Near Waltham, Ma
13 hours ago · USGS 01104480 |
0 cfs | · | 36°F | 78°F | 62 ft | Charles |
🔒 Premium
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
Flow report FAQ
About Massachusetts streamflow
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.
Browse other states
Streamflow in every state
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
District Of Columbia
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Puerto Rico
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virgin Islands
Virginia
Washington
West Virginia
Wisconsin
Wyoming