About this river
Lamprey River is a 14.0 mile river near Cinnamon Rainbows Surf Company in New Hampshire. Streamflow is measured at the USGS gauge Lamprey River near Newmarket, NH (site 01073500). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1934 to 2026
Lamprey River typically runs highest in April, at a median 540 cfs, and lowest in September, at 33 cfs. The highest flow on record for any single day is 8,400 cfs, in 2006.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 229 | 142 to 369 | |
| February | 213 | 150 to 367 | |
| March | 425 | 275 to 754 | |
| April | 540 | 311 to 831 | |
| May | 260 | 174 to 436 | |
| June | 131 | 64 to 205 | |
| July | 56 | 27 to 120 | |
| August | 40 | 16 to 92 | |
| September | 33 | 13 to 77 | |
| October | 82 | 36 to 157 | |
| November | 187 | 92 to 361 | |
| December | 262 | 146 to 459 |
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 92 years of record. Statistics published by the US Geological Survey for Lamprey River near Newmarket, NH (site 01073500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
5 mapped launches sit in the mapped area of Lamprey River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Newfields TownSquamscott RiverPublic
- Onway LakeOnway LakePublic
- Newmarket TownLamprey RiverPublic
- Piscassic ParkPiscassic RiverPublic
- Pawtuckaway LakePawtuckaway PondPublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Lamprey 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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