Around here
Around Sumas River
Source: Recreation Sites and Trails BC, Open Government Licence (British Columbia) · Data Source: Recreation.gov · Source: USGS GNIS · Source: Canadian Geographical Names Database (NRCan), Open Government Licence - Canada · Public land: USGS PAD-US
About this river
Sumas River is an 18.2 mile river. Streamflow is measured at the USGS gauge Sumas River near Sumas, WA (site 12214500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1948 to 2026
Sumas River typically runs highest in April, at a median 101 cfs, and lowest in September, at 17 cfs. The highest flow on record for any single day is 660 cfs, in 1950.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 74 | 53 to 125 |
| February | 83 | 54 to 136 |
| March | 96 | 64 to 147 |
| April | 101 | 66 to 150 |
| May | 56 | 41 to 90 |
| June | 34 | 29 to 49 |
| July | 22 | 20 to 27 |
| August | 18 | 15 to 20 |
| September | 17 | 12 to 22 |
| October | 21 | 16 to 34 |
| November | 59 | 32 to 118 |
| December | 87 | 37 to 159 |
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 Sumas River near Sumas, WA (site 12214500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Made to print
Put Sumas River on your wall
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.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Sumas River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
