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Real-time wind speeds, peak gusts, and surface chop forecasts from NOAA National Weather Service, verified public boat launches, USGS surface water telemetry, and Illinois state boating regulations for Lake Decatur (Illinois).
Peak Gusts: 6 mph. Light surface ripple; smooth navigation.
Cold Shock Hazard: Life jackets are strongly urged for all vessel occupants across open water.
Ramp Accessibility: Local elevation datum referenced for safe boating operations on Lake Decatur.
Advisory Threshold: Official Lake Wind Advisories trigger when sustained winds reach 15 mph or waves exceed 3 ft.
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Excellent for boating (99/100), from 4 available inputs. Supporting this: Wind 1 mph from the north-northwest. Gusts to 5 mph. Not available from a verified source for this lake: visibility and conditions, verified water access. Confidence is moderate (84%) because some inputs are unavailable or older than ideal.
| Forecast Time | Wind (mph) | Gust (mph) | Direction | Surface Chop & Fetch | Watercraft Readiness |
|---|---|---|---|---|---|
| 12 PM | 1 mph | 5 mph | N | Calm mirror surface; flat wake navigation | Optimal |
| 1 PM | 1 mph | 4 mph | NW | Calm mirror surface; flat wake navigation | Optimal |
| 2 PM | 1 mph | 4 mph | NW | Calm mirror surface; flat wake navigation | Optimal |
| 3 PM | 2 mph | 5 mph | W | Calm mirror surface; flat wake navigation | Optimal |
| 4 PM | 3 mph | 6 mph | W | Calm mirror surface; flat wake navigation | Optimal |
| 5 PM | 3 mph | 5 mph | W | Calm mirror surface; flat wake navigation | Optimal |
| 6 PM | 3 mph | 5 mph | SW | Calm mirror surface; flat wake navigation | Optimal |
| 7 PM | 3 mph | 5 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 8 PM | 3 mph | 5 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 9 PM | 3 mph | 6 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 10 PM | 5 mph | 6 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 11 PM | 5 mph | 7 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 12 AM | 5 mph | 8 mph | S | Calm mirror surface; flat wake navigation | Optimal |
| 1 AM | 6 mph | 10 mph | S | Light surface ripple; gentle boat glide | Optimal |
| 2 AM | 7 mph | 10 mph | S | Light surface ripple; gentle boat glide | Optimal |
| 3 AM | 7 mph | 12 mph | S | Light surface ripple; gentle boat glide | Optimal |
| 4 AM | 7 mph | 13 mph | S | Light surface ripple; gentle boat glide | Optimal |
| 5 AM | 7 mph | 13 mph | SW | Light surface ripple; gentle boat glide | Optimal |
Surface chop expands with sustained wind duration across Lake Decatur's open water fetch. Early morning hours typically offer the calmest navigation before thermal afternoon winds develop.
Individual boat ramp GPS coordinates are currently being cataloged for Lake Decatur. Public launches are managed by state, county, or local park authorities.
Ramp operational status and courtesy dock availability are subject to seasonal water level shifts and lake management authority guidelines.
Current index calculated from verified local atmospheric, hydrographic & alert inputs.
Excellent for kayaking (99/100), from 5 available inputs. Supporting this: Wind 1 mph from the north-northwest. Gusts to 5 mph. Confidence is high (90%).