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Around Saint John River
Nature18
Source: USGS GNIS · Source: Canadian Geographical Names Database (NRCan), Open Government Licence - Canada · Public land: USGS PAD-US
About this river
Saint John River is a 43.2 mile river. Streamflow is measured at the USGS gauge St. John River at Ninemile Bridge, Maine (site 01010000). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1951 to 2026
Saint John River typically runs highest in April, at a median 5,265 cfs, and lowest in February, at 443 cfs. The highest flow on record for any single day is 44,700 cfs, in 2019.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 610 | 380 to 938 |
| February | 443 | 289 to 772 |
| March | 665 | 273 to 1,320 |
| April | 5,265 | 2,040 to 9,185 |
| May | 4,160 | 2,670 to 6,930 |
| June | 1,370 | 671 to 2,515 |
| July | 814 | 406 to 1,840 |
| August | 582 | 253 to 1,470 |
| September | 570 | 268 to 1,375 |
| October | 1,390 | 494 to 2,680 |
| November | 1,705 | 974 to 3,105 |
| December | 985 | 650 to 1,560 |
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 76 years of record. Statistics published by the US Geological Survey for St. John River at Ninemile Bridge, Maine (site 01010000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
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This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Saint John 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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