About this river
South Mayo River is a 9.9 mile river near Smith River Outfitters in Virginia. Streamflow is measured at the USGS gauge South Mayo River near Nettleridge, VA (site 02069700). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1963 to 2026
South Mayo River typically runs highest in March, at a median 127 cfs, and lowest in September, at 62 cfs. The highest flow on record for any single day is 6,820 cfs, in 1972.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 109 | 78 to 156 | |
| February | 118 | 85 to 170 | |
| March | 127 | 94 to 183 | |
| April | 126 | 93 to 179 | |
| May | 117 | 87 to 165 | |
| June | 97 | 65 to 132 | |
| July | 80 | 56 to 111 | |
| August | 70 | 51 to 102 | |
| September | 62 | 45 to 90 | |
| October | 65 | 49 to 94 | |
| November | 70 | 55 to 113 | |
| December | 94 | 67 to 140 |
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 South Mayo River near Nettleridge, VA (site 02069700). 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 South Mayo 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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