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Official National Weather Service (NWS) point forecast and real-time wind conditions for Deerfield Reservoir (South Dakota). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 76°F · Low 56°F
Peak gusts: 11 mph · Lake surface chop expected
Humidity: 21% · Barometer: 29.74 inHg
USGS water monitoring available for Deerfield Reservoir.
Good for boating (86/100), from 4 available inputs. Supporting this: Wind 7 mph from the southwest. No active official alerts for this lake. 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.
Excellent for fishing (94/100), from 5 available inputs. Supporting this: Wind 7 mph from the southwest. Morning hours (08:00 local). 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 (84/100), from 5 available inputs. Supporting this: Wind 7 mph from the southwest. 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. Working against it: Air temperature 58°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 8 AM | 58°F | 7 mph | SW | ⚡ 20 mph | 0% | Sunny |
| 9 AM | 56°F | 7 mph | SW | ⚡ 21 mph | 0% | Sunny |
| 10 AM | 63°F | 7 mph | SW | ⚡ 21 mph | 0% | Sunny |
| 11 AM | 67°F | 8 mph | SW | ⚡ 22 mph | 0% | Sunny |
| 12 PM | 69°F | 9 mph | SW | ⚡ 24 mph | 0% | Sunny |
| 1 PM | 71°F | 12 mph | SW | ⚡ 25 mph | 0% | Sunny |
| 2 PM | 73°F | 13 mph | SW | ⚡ 24 mph | 0% | Sunny |
| 3 PM | 75°F | 13 mph | SW | ⚡ 25 mph | 0% | Sunny |
| 4 PM | 76°F | 13 mph | SW | ⚡ 27 mph | 0% | Sunny |
| 5 PM | 75°F | 13 mph | SW | ⚡ 25 mph | 0% | Sunny |
| 6 PM | 71°F | 9 mph | SW | ⚡ 23 mph | 0% | Sunny |
| 7 PM | 68°F | 8 mph | SW | ⚡ 21 mph | 2% | Mostly Clear |
| 8 PM | 65°F | 8 mph | SW | ⚡ 22 mph | 2% | Mostly Clear |
| 9 PM | 64°F | 8 mph | SW | ⚡ 22 mph | 2% | Mostly Clear |
| 10 PM | 62°F | 8 mph | SW | ⚡ 22 mph | 2% | Mostly Clear |
| 11 PM | 61°F | 8 mph | SW | ⚡ 22 mph | 2% | Mostly Clear |
| 12 AM | 60°F | 8 mph | SW | ⚡ 22 mph | 2% | Mostly Clear |
| 1 AM | 59°F | 8 mph | SW | ⚡ 21 mph | 2% | Mostly Clear |
| 2 AM | 58°F | 8 mph | SW | ⚡ 21 mph | 2% | Mostly Clear |
| 3 AM | 57°F | 7 mph | SW | ⚡ 20 mph | 2% | Mostly Clear |
| 4 AM | 56°F | 7 mph | SW | ⚡ 20 mph | 2% | Mostly Clear |
| 5 AM | 55°F | 7 mph | SW | ⚡ 20 mph | 2% | Mostly Clear |
| 6 AM | 54°F | 7 mph | SW | ⚡ 20 mph | 2% | Mostly Clear |
| 7 AM | 52°F | 7 mph | SW | ⚡ 20 mph | 0% | 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. High near 76, with temperatures falling to around 71 in the afternoon. Southwest wind 7 to 13 mph, with gusts as high as 26 mph.
Mostly clear. Low around 52, with temperatures rising to around 54 overnight. Southwest wind around 8 mph, with gusts as high as 22 mph.
Sunny. High near 74, with temperatures falling to around 69 in the afternoon. Southwest wind 5 to 8 mph, with gusts as high as 23 mph.
A slight chance of rain before midnight. Mostly cloudy, with a low around 47. Southwest wind around 3 mph. Chance of precipitation is 20%.
Mostly cloudy. High near 62, with temperatures falling to around 54 in the afternoon. Southwest wind 1 to 5 mph, with gusts as high as 17 mph.
A chance of rain. Mostly cloudy, with a low around 39. Southeast wind around 3 mph. Chance of precipitation is 50%.
A chance of rain before noon. Partly sunny, with a high near 57.
A chance of rain. Partly cloudy, with a low around 38.
A chance of rain. Mostly sunny, with a high near 57.
Rain likely. Mostly cloudy, with a low around 38.
Rain likely. Partly sunny, with a high near 51.
Rain likely before 3am, then rain and snow likely. Mostly cloudy, with a low around 35.
A chance of rain and snow. Partly sunny, with a high near 45.
A chance of snow. Partly cloudy, with a low around 28. New snow accumulation of less than half an inch possible.
Deerfield Reservoir currently reports 48°F with wind velocity near 8 mph from the SW. 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 Deerfield Reservoir 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 UNR) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Deerfield Reservoir 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 Deerfield Reservoir Water Level & Temperature page.
View Deerfield Reservoir Water Level & Temperature →