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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake Koshkonong (Wisconsin). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 79°F · Low 63°F
Peak gusts: 11 mph · Lake surface chop expected
Humidity: 78% · Barometer: 30.09 inHg
USGS water monitoring available for Lake Koshkonong.
Good for boating (88/100), from 4 available inputs. Supporting this: No active official alerts for this lake. Wind 10 mph from the south. 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.
Good for fishing (86/100), from 5 available inputs. Supporting this: Wind 10 mph from the south. 0% chance of precipitation. Not available from a verified source for this lake: pressure trend, water temperature. Confidence is moderate (74%) because some inputs are unavailable or older than ideal.
Good for kayaking (88/100), from 5 available inputs. Supporting this: Wind 10 mph from the south. No active official alerts for this lake. Confidence is high (90%).
Water temperature is not available from a verified source for this lake. No swimming score is shown without it. Supporting this: No active official alerts for this lake. 0% chance of precipitation. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 10 AM | 65°F | 10 mph | S | ⚡ 15 mph | 0% | Sunny |
| 11 AM | 69°F | 10 mph | S | ⚡ 16 mph | 0% | Sunny |
| 12 PM | 73°F | 10 mph | S | ⚡ 16 mph | 0% | Sunny |
| 1 PM | 76°F | 10 mph | S | ⚡ 16 mph | 0% | Sunny |
| 2 PM | 78°F | 10 mph | S | ⚡ 16 mph | 0% | Sunny |
| 3 PM | 79°F | 10 mph | S | ⚡ 15 mph | 0% | Sunny |
| 4 PM | 79°F | 10 mph | S | ⚡ 15 mph | 0% | Sunny |
| 5 PM | 77°F | 10 mph | S | ⚡ 15 mph | 0% | Sunny |
| 6 PM | 75°F | 10 mph | S | ⚡ 14 mph | 0% | Mostly Clear |
| 7 PM | 70°F | 5 mph | S | ⚡ 13 mph | 0% | Clear |
| 8 PM | 66°F | 5 mph | S | ⚡ 13 mph | 0% | Clear |
| 9 PM | 65°F | 5 mph | S | ⚡ 14 mph | 0% | Mostly Clear |
| 10 PM | 64°F | 10 mph | S | ⚡ 15 mph | 0% | Mostly Clear |
| 11 PM | 64°F | 10 mph | S | ⚡ 16 mph | 0% | Mostly Clear |
| 12 AM | 63°F | 10 mph | S | ⚡ 16 mph | 0% | Mostly Clear |
| 1 AM | 63°F | 10 mph | S | ⚡ 16 mph | 0% | Mostly Clear |
| 2 AM | 63°F | 10 mph | S | ⚡ 16 mph | 0% | Partly Cloudy |
| 3 AM | 63°F | 10 mph | S | ⚡ 17 mph | 0% | Partly Cloudy |
| 4 AM | 63°F | 10 mph | S | ⚡ 17 mph | 0% | Partly Cloudy |
| 5 AM | 63°F | 10 mph | S | ⚡ 17 mph | 0% | Mostly Cloudy |
| 6 AM | 63°F | 10 mph | S | ⚡ 17 mph | 0% | Mostly Sunny |
| 7 AM | 63°F | 10 mph | S | ⚡ 18 mph | 4% | Partly Sunny |
| 8 AM | 65°F | 10 mph | SW | ⚡ 20 mph | 6% | Mostly Sunny |
| 9 AM | 69°F | 10 mph | SW | ⚡ 18 mph | 6% | Mostly Sunny |
Mirror-like to gentle rippled water. Optimal conditions for paddleboarding, kayaking, swimming, and beginner water skiing or wakeboarding.
Pleasant breeze with small wavelets. Great for sailing, pleasure cruising, pontoon boats, and trolling for trout and bass.
Moderate waves with whitecaps likely. Requires skilled boat handling; kayaks, canoes, and stand-up paddleboards should stay close to sheltered bays.
Steep waves, cold spray, and hazardous open water. Avoid small craft voyages. Always check official National Weather Service lake wind advisories.
Sunny, with a high near 79. South wind around 10 mph.
Mostly clear, with a low around 61. South wind 5 to 10 mph.
Mostly sunny, with a high near 84. Southwest wind 10 to 15 mph.
A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 66. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 75. West wind 5 to 10 mph.
A slight chance of rain showers after 7pm. Partly cloudy, with a low around 54. North wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers. Partly sunny, with a high near 67. Northeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers. Mostly cloudy, with a low around 49. Northeast wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 46. Chance of precipitation is 50%.
A chance of rain showers before 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 40%.
Mostly cloudy, with a low around 36.
Mostly sunny, with a high near 53.
Mostly clear, with a low around 35.
Lake Koshkonong currently reports 56°F with wind velocity near 8 mph from the S. Atmospheric forecasts and 24-hour hour-by-hour wind timelines are updated hourly from the National Weather Service gridpoint matching the lake's coordinates.
At Lake Koshkonong and surrounding mountain valleys, diurnal heating of the surrounding terrain causes strong thermal pressure differentials known locally as afternoon breezes (such as the Washoe Zephyr at Lake Tahoe). Wind speeds typically peak between 1:00 PM and 5:00 PM before calming near sunset.
For stand-up paddleboarding (SUP), canoeing, and light kayaks, winds under 7 mph (light breeze) offer the safest, glassiest surface conditions. Between 8–14 mph, small wavelets develop, suitable for sailboats and powerboats. Winds exceeding 15 mph create steep whitecaps and rapid drift; winds over 21 mph warrant small craft warnings.
All weather and wind telemetry is fetched directly from the National Weather Service (NOAA - WFO MKX) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lake Koshkonong without artificial smoothing or third-party estimates.
Yes. Live hydrological sensor readings, 30-day elevation histories, full-pool benchmarks, and USGS station provenance are available on our dedicated Lake Koshkonong Water Level & Temperature page.
View Lake Koshkonong Water Level & Temperature →