About this river
Issaquah Creek is a 3.5 mile river near Fish Finders Private Charters in Washington. Streamflow is measured at the USGS gauge Issaquah Creek near Mouth near Issaquah, WA (site 12121600). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1964 to 2026
Issaquah Creek typically runs highest in January, at a median 195 cfs, and lowest in August, at 26 cfs. The highest flow on record for any single day is 2,440 cfs, in 2020.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 195 | 130 to 340 | |
| February | 171 | 119 to 247 | |
| March | 170 | 124 to 238 | |
| April | 140 | 103 to 180 | |
| May | 81 | 65 to 110 | |
| June | 60 | 45 to 93 | |
| July | 35 | 29 to 49 | |
| August | 26 | 21 to 34 | |
| September | 27 | 22 to 36 | |
| October | 38 | 29 to 55 | |
| November | 123 | 64 to 202 | |
| December | 181 | 108 to 294 |
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 63 years of record. Statistics published by the US Geological Survey for Issaquah Creek near Mouth near Issaquah, WA (site 12121600). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Issaquah Creek'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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