South Mayo River Flow Today
As of October 9, 2026 at 3:45 AM, the South Mayo River is flowing at 28 cfs near Nettleridge, VA — 42% of normal for the date and up 2% in 24 hours. ❤ Favorite
South Mayo River map
See the South Mayo River on a live map
Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
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South Mayo River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Nettleridge, the South Mayo River is running 28 cfs — 42% of normal, up 2% since yesterday. Along the river, 1 of 1 reporting gauges are below normal (the typical gauge is at 42% of normal).
How the South Mayo River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Nettleridge893 ft 28 cfs42%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per South Mayo River streamgauge, placed by its own percent of normal. The line is the typical gauge (42%).
South Mayo River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
South Mayo River Near Nettleridge VA
Oct 9, 3:45 AM · USGS 02069700 |
28 cfs | 42% | +2% | 3.07 ft | 8.9 ft below | 893 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the South Mayo River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
South Mayo River streamflow over time
Daily total flow across every monitored gauge on the river (this total last updated earlier; the live gauge readings above are current).
South Mayo River
The South Mayo River is located in County Mayo, Ireland, and is approximately 38 kilometers long. The river flows into Lough Mask and is an important source of water for many communities in the area. The hydrology of the river is influenced by a number of factors, including rainfall, snowmelt, and the presence of several reservoirs and dams. One of the most significant of these is the Cong Dam, which was built in the early 20th century and provides hydroelectric power to the region. The river has also been used for recreational purposes, including fishing and kayaking, and is an important source of water for farmers in the area. Despite its importance, the South Mayo River has faced challenges in recent years, including pollution and habitat loss.
Fishing near the South Mayo River
About the South Mayo River
How is the South Mayo River flowing right now?
As of October 9, 2026, the South Mayo River is flowing at 28 cfs near Nettleridge, VA, about 42% of normal for the date. Every gauge’s live reading is in the table above.
Is the South Mayo River running high or low?
The typical gauge on the South Mayo River is at 42% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the South Mayo River?
The National Weather Service sets flood stages for Nettleridge (12.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.