Tonka Bay Marina
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Around here
Around Tonka Bay Marina
- Mississippi River - St. Anthony Falls PoolRecreation area16.9 mi (opens in a new tab)
- Minnesota Valley National Wildlife RefugeRecreation area18.2 mi (opens in a new tab)
- Minnesota Valley Wetland Management DistrictRecreation area18.2 mi (opens in a new tab)
- Mississippi River - Pool 1Recreation area18.4 mi (opens in a new tab)
- Mississippi National River & Recreation AreaRecreation area23.6 mi (opens in a new tab)
- Mississippi River Visitor CenterVisitor center23.6 mi (opens in a new tab)
Data Source: Recreation.gov · Source: USGS GNIS · Source: National Park Service. No claim to original U.S. Government works. · Public land: USGS PAD-US
Typical flow by month
1906 to 2026
The water at Tonka Bay Marina typically runs highest in April, at a median 1,610 cfs, and lowest in February, at 120 cfs. The highest flow on record for any single day is 22,100 cfs, in 1965.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 130 | 55 to 290 |
| February | 120 | 50 to 248 |
| March | 300 | 120 to 860 |
| April | 1,610 | 615 to 3,070 |
| May | 1,270 | 462 to 2,580 |
| June | 1,080 | 353 to 2,125 |
| July | 666 | 209 to 1,840 |
| August | 290 | 91 to 793 |
| September | 199 | 85 to 657 |
| October | 195 | 76 to 608 |
| November | 210 | 87 to 766 |
| December | 168 | 69 to 475 |
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 106 years of record. Statistics published by the US Geological Survey for Crow River at Rockford, MN (site 05280000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Today · Fri
86Go/ 100
CloudyHigh 44°F, low 29°FRain 0%Wind 4 kt, gusts 10
Streamflow
1,350 cfs
Above normal (85th)
Water level
4.11 ft
Air quality
51 Moderate
Shakopee monitor, 15 km
National Weather ServiceBelow flood stage
Flood stage 10 ft. NWS reads 4.14 ft here.
NWS issues forecasts here only during high water.
Forecast from Open-Meteo global models (NOAA & ECMWF). Flood stages and forecasts: NOAA National Weather Service. Air quality: Minnesota Pollution Control Agency via EPA AirNow. Preliminary data, not verified. See full conditions →
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