About this river
Alsea River is a 3.0 mile river near Ossies Surf Shop in Oregon. Streamflow is measured at the USGS gauge Alsea River near Tidewater, OR (site 14306500). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1940 to 2026
Alsea River typically runs highest in January, at a median 2,420 cfs, and lowest in September, at 92 cfs. The highest flow on record for any single day is 36,100 cfs, in 1965.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2,420 | 1,440 to 4,400 | |
| February | 2,160 | 1,300 to 3,790 | |
| March | 1,870 | 1,200 to 3,120 | |
| April | 1,210 | 880 to 1,995 | |
| May | 655 | 479 to 942 | |
| June | 357 | 275 to 468 | |
| July | 177 | 146 to 213 | |
| August | 106 | 86 to 126 | |
| September | 92 | 76 to 120 | |
| October | 122 | 86 to 256 | |
| November | 731 | 369 to 2,300 | |
| December | 2,200 | 1,130 to 4,250 |
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 86 years of record. Statistics published by the US Geological Survey for Alsea River near Tidewater, OR (site 14306500). 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 Alsea River. Ramp data comes from the USGS national boat-ramp inventory.
- Five RiversAlsea RiverPublic
- Blackberry CampgroundAlsea RiverPublic
- RiveredgeAlsea RiverPublic
- Mike Bauer WaysideAlsea RiverPublic
- Kozy KoveAlsea RiverRestricted
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Alsea 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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