Sudbury River Flow Today
As of October 10, 2026 at 3:15 AM, the Sudbury River is flowing at 19 cfs at Saxonville, MA — 87% of normal for the date and down 20% in 24 hours. ❤ Favorite
Sudbury River map
See the Sudbury River on a live map
Every gauge, dam and paddle run on the river, one tap each:
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Sudbury River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Saxonville, the Sudbury River is running 19 cfs — 87% of normal, down 20% since yesterday. Along the river, 1 of 1 reporting gauges are below normal (the typical gauge is at 87% of normal).
In the last 24 hours the river is dropping at Saxonville (-20%).
How the Sudbury River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Saxonville116 ft 19 cfs87%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Sudbury River streamgauge, placed by its own percent of normal. The line is the typical gauge (87%).
Sudbury River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Sudbury River At Saxonville MA
Oct 10, 3:15 AM · USGS 01098530 |
19 cfs | 87% | -20% | 4.27 ft | 5.7 ft below | 116 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Sudbury River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Sudbury River streamflow over time
Daily total flow across every monitored gauge on the river (this total last updated earlier; the live gauge readings above are current).
Sudbury River
The Sudbury River is a 32-mile-long river in Eastern Massachusetts that flows from its headwaters in Westborough through Sudbury, Wayland, and Concord before joining the Assabet River in Concord to form the Concord River. The river has a rich history, having been used by Native American tribes for fishing and hunting, and later by European settlers for agricultural purposes.
Several reservoirs and dams along the Sudbury River, including the Heard Pond Dam and the Moody Street Dam, have been installed over the years to control flooding and provide water for local communities. However, these structures have also had negative impacts on the river's ecology and have led to the degradation of its natural habitats.
Despite these challenges, the Sudbury River remains an important recreational resource for local communities, with activities such as fishing, canoeing, and hiking being popular among visitors. Additionally, a number of farms and agricultural operations rely on the river for irrigation and other purposes.
Fishing near the Sudbury River
About the Sudbury River
How is the Sudbury River flowing right now?
As of October 10, 2026, the Sudbury River is flowing at 19 cfs at Saxonville, MA, about 87% of normal for the date. Every gauge’s live reading is in the table above.
Is the Sudbury River running high or low?
The typical gauge on the Sudbury River is at 87% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Sudbury River?
The National Weather Service sets flood stages for Saxonville (10.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.