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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lewis and Clark Lake (South Dakota). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 84°F · Low 68°F
Peak gusts: 26 mph · Lake surface chop expected
Humidity: 35% · Barometer: 30.01 inHg
USGS water monitoring available for Lewis and Clark Lake.
Fair for boating (74/100), from 4 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. 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 (75/100), from 5 available inputs. Supporting this: 0% chance of precipitation. Sky is clear (2% cloud cover). 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.
Fair for kayaking (73/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. 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 |
|---|---|---|---|---|---|---|
| 3 AM | 74°F | 15 mph | S | ⚡ 24 mph | 0% | Clear |
| 4 AM | 72°F | 15 mph | S | ⚡ 22 mph | 0% | Clear |
| 5 AM | 70°F | 10 mph | S | ⚡ 17 mph | 0% | Mostly Clear |
| 6 AM | 69°F | 10 mph | S | ⚡ 14 mph | 0% | Mostly Sunny |
| 7 AM | 68°F | 10 mph | S | ⚡ 13 mph | 0% | Mostly Sunny |
| 8 AM | 69°F | 10 mph | S | ⚡ 15 mph | 0% | Mostly Sunny |
| 9 AM | 70°F | 10 mph | S | ⚡ 18 mph | 0% | Sunny |
| 10 AM | 73°F | 10 mph | S | ⚡ 21 mph | 0% | Sunny |
| 11 AM | 76°F | 10 mph | S | ⚡ 21 mph | 0% | Sunny |
| 12 PM | 79°F | 10 mph | S | ⚡ 18 mph | 0% | Mostly Sunny |
| 1 PM | 83°F | 10 mph | S | ⚡ 16 mph | 0% | Mostly Sunny |
| 2 PM | 84°F | 10 mph | S | ⚡ 15 mph | 1% | Mostly Sunny |
| 3 PM | 84°F | 10 mph | S | ⚡ 15 mph | 1% | Partly Sunny |
| 4 PM | 84°F | 10 mph | SW | ⚡ 14 mph | 1% | Mostly Cloudy |
| 5 PM | 84°F | 10 mph | SW | ⚡ 14 mph | 1% | Partly Sunny |
| 6 PM | 82°F | 5 mph | SW | ⚡ 15 mph | 1% | Mostly Cloudy |
| 7 PM | 79°F | 5 mph | SW | ⚡ 15 mph | 1% | Mostly Cloudy |
| 8 PM | 75°F | 5 mph | W | ⚡ 16 mph | 1% | Mostly Cloudy |
| 9 PM | 71°F | 5 mph | NW | ⚡ 16 mph | 2% | Mostly Cloudy |
| 10 PM | 71°F | 5 mph | NW | ⚡ 16 mph | 2% | Mostly Cloudy |
| 11 PM | 70°F | 5 mph | NW | ⚡ 9 mph | 2% | Partly Cloudy |
| 12 AM | 68°F | 5 mph | NW | ⚡ 8 mph | 2% | Mostly Clear |
| 1 AM | 67°F | 5 mph | NW | ⚡ 7 mph | 3% | Mostly Clear |
| 2 AM | 66°F | 5 mph | NW | ⚡ 7 mph | 3% | Mostly Clear |
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.
Mostly clear, with a low around 68. South wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly sunny, with a high near 85. South wind around 10 mph, with gusts as high as 25 mph.
Partly cloudy, with a low around 61. West northwest wind around 5 mph.
Mostly sunny, with a high near 79. North northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Mostly clear, with a low around 51. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunny, with a high near 67. North northwest wind 5 to 10 mph.
Partly cloudy, with a low around 50.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 65.
Rain showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
A chance of rain showers before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Mostly sunny, with a high near 55.
Mostly clear, with a low around 37.
Sunny, with a high near 58.
Lewis and Clark Lake currently reports 77°F with wind velocity near 13 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 Lewis and Clark Lake 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 FSD) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lewis and Clark Lake 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 Lewis and Clark Lake Water Level & Temperature page.
View Lewis and Clark Lake Water Level & Temperature →