Sunset Bay Marina
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Boat launches near Sunset Bay Marina
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Typical flow by month
1933 to 2026
The water at Sunset Bay Marina typically runs highest in April, at a median 429 cfs, and lowest in January, at 55 cfs. The highest flow on record for any single day is 10,400 cfs, in 2008.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 55 | 26 to 110 | |
| February | 62 | 30 to 113 | |
| March | 303 | 107 to 711 | |
| April | 429 | 202 to 864 | |
| May | 353 | 157 to 708 | |
| June | 345 | 138 to 775 | |
| July | 207 | 78 to 469 | |
| August | 99 | 51 to 226 | |
| September | 84 | 45 to 203 | |
| October | 87 | 40 to 270 | |
| November | 114 | 44 to 244 | |
| December | 76 | 33 to 161 |
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 94 years of record. Statistics published by the US Geological Survey for Winnebago River at Mason City, IA (site 05459500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Current conditions
Streamflow
398 cfs
Above normal (84th)
Water level
5.70 ft
High today
63°F
Wind
10 kt
Gusts 16 kt
Rain chance
0%
Week ahead
Forecast from Open-Meteo global models (NOAA & ECMWF). See full conditions →
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