About this river
North Branch Sugar River is a 7.8 mile river near TBC Guides in New Hampshire. Streamflow is measured at the USGS gauge Sugar River 0.2 MI below NH 11, at Sunapee, NH (site 01152010). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2019 to 2026
North Branch Sugar River typically runs highest in January, at a median 102 cfs, and lowest in September, at 11 cfs. The highest flow on record for any single day is 635 cfs, in 2023.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 102 | 58 to 187 | |
| February | 81 | 70 to 99 | |
| March | 78 | 56 to 154 | |
| April | 100 | 71 to 156 | |
| May | 62 | 51 to 131 | |
| June | 47 | 41 to 67 | |
| July | 37 | 16 to 179 | |
| August | 13 | 10 to 69 | |
| September | 11 | 8.8 to 48 | |
| October | 17 | 7.3 to 42 | |
| November | 24 | 7.5 to 115 | |
| December | 97 | 62 to 155 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 7 years of record. Statistics published by the US Geological Survey for Sugar River 0.2 MI below NH 11, at Sunapee, NH (site 01152010). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show North Branch Sugar River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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