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Around Atchafalaya River
Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US
About this river
Atchafalaya River is a 56.9 mile river near Champagne's Cajun Swamp Tours in Louisiana. Streamflow is measured at the USGS gauge Atchafalaya River at Simmesport, LA (site 07381490). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2010 to 2022
Atchafalaya River typically runs highest in May, at a median 362,000 cfs, and lowest in November, at 117,000 cfs. The highest flow on record for any single day is 694,000 cfs, in 2011.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 256,000 | 192,000 to 372,000 |
| February | 279,000 | 175,000 to 406,000 |
| March | 350,000 | 259,000 to 472,000 |
| April | 361,500 | 306,500 to 440,000 |
| May | 362,000 | 289,000 to 454,000 |
| June | 326,000 | 247,000 to 419,000 |
| July | 247,000 | 203,000 to 282,000 |
| August | 159,000 | 128,000 to 197,000 |
| September | 130,000 | 100,100 to 159,000 |
| October | 118,000 | 84,900 to 164,000 |
| November | 117,000 | 99,700 to 216,500 |
| December | 180,000 | 123,000 to 332,000 |
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 12 years of record. Statistics published by the US Geological Survey for Atchafalaya River at Simmesport, LA (site 07381490). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
8 mapped launches sit in the mapped area of Atchafalaya River. Ramp data comes from the USGS national boat-ramp inventory.
- McGee's LandingHenderson SwampRestricted
- Atchafalaya Basin LandingHenderson SwampRestricted
- HendersonAtchafalaya BasinPublic
- Kern's LandingAtchafalaya BasinRestricted
- Atchafalaya Basin I-10 Bridge (West)Bay HahaPublic
- Krotz Springs CampgroundAtchafalaya RiverRestricted
- Sherburne Wildlife Management AreaAlabama BayouRestricted
- Sherburne Wildlife Management AreaAlabama BayouPublic
Made to print
Put Atchafalaya 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 Atchafalaya 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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