Waterlands
St. Marys River
USGS · 04180988
ST. MARYS RIVER
USGS · 04180988LIVE

St. Marys River at Rockford OH

OHIO40.6948°N, -84.6466°W Updated 53 min ago
FLOW RATE
55.9cfs
GAUGE HT
1.79ft
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
55.9cfs 79.9% vs avg
Optimal band: 32–43 cfs
PERIOD HIGH
55.9cfs
PERIOD LOW
34.6cfs
RUNNABLE
85%
last 1 day in band

Gauge Height

1.79ft
Precipitation History
Your History · St. Marys River at Rockford OH

Track your history

Sign in to track your sessions at St. Marys River at Rockford OH — best days, monthly trends, and time on the water.

Sign in
SPONSORED

Station Location

40.6948, -84.6466
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-07 20:40 UTC
Site #04180988·USGS

Create a free account to save favorites, set flow alerts, and track conditions

Sign up free