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Official National Weather Service (NWS) point forecast and real-time wind conditions for Angostura Reservoir (South Dakota). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 70°F · Low 54°F
Peak gusts: 25 mph · Lake surface chop expected
Humidity: 49% · Barometer: 29.77 inHg
USGS water monitoring available for Angostura Reservoir.
Excellent for boating (94/100), from 4 available inputs. Supporting this: Wind 5 mph from the northeast. 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.
Good for fishing (87/100), from 5 available inputs. Supporting this: Wind 5 mph from the northeast. 2% 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.
Excellent for kayaking (93/100), from 5 available inputs. Supporting this: Wind 5 mph from the northeast. Gusts to 13 mph. 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. 2% 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 |
|---|---|---|---|---|---|---|
| 4 AM | 58°F | 5 mph | NE | ⚡ 13 mph | 2% | Mostly Cloudy |
| 5 AM | 56°F | 6 mph | NE | ⚡ 14 mph | 2% | Mostly Cloudy |
| 6 AM | 54°F | 6 mph | NE | ⚡ 16 mph | 3% | Partly Sunny |
| 7 AM | 54°F | 7 mph | NE | ⚡ 17 mph | 3% | Mostly Cloudy |
| 8 AM | 55°F | 8 mph | NE | ⚡ 18 mph | 3% | Mostly Cloudy |
| 9 AM | 56°F | 10 mph | NE | ⚡ 18 mph | 2% | Mostly Cloudy |
| 10 AM | 59°F | 12 mph | NE | ⚡ 20 mph | 2% | Mostly Cloudy |
| 11 AM | 63°F | 12 mph | NE | ⚡ 18 mph | 2% | Mostly Cloudy |
| 12 PM | 65°F | 12 mph | NE | ⚡ 18 mph | 5% | Partly Sunny |
| 1 PM | 67°F | 12 mph | NE | ⚡ 20 mph | 5% | Mostly Sunny |
| 2 PM | 69°F | 14 mph | NE | ⚡ 22 mph | 5% | Mostly Sunny |
| 3 PM | 70°F | 16 mph | NE | ⚡ 24 mph | 5% | Mostly Sunny |
| 4 PM | 70°F | 17 mph | NE | ⚡ 25 mph | 5% | Mostly Sunny |
| 5 PM | 68°F | 20 mph | NE | ⚡ 28 mph | 5% | Partly Sunny |
| 6 PM | 65°F | 21 mph | NE | ⚡ 30 mph | 28% | Chance Rain Showers |
| 7 PM | 61°F | 21 mph | NE | ⚡ 30 mph | 28% | Chance Rain Showers |
| 8 PM | 59°F | 22 mph | NE | ⚡ 30 mph | 28% | Chance Rain Showers |
| 9 PM | 58°F | 22 mph | NE | ⚡ 30 mph | 28% | Chance Rain Showers |
| 10 PM | 56°F | 22 mph | NE | ⚡ 30 mph | 28% | Chance Rain Showers |
| 11 PM | 55°F | 21 mph | NE | ⚡ 29 mph | 28% | Chance Rain Showers |
| 12 AM | 54°F | 20 mph | NE | ⚡ 27 mph | 25% | Chance Rain Showers |
| 1 AM | 53°F | 18 mph | NE | ⚡ 25 mph | 25% | Chance Rain Showers |
| 2 AM | 51°F | 16 mph | NE | ⚡ 22 mph | 25% | Chance Rain Showers |
| 3 AM | 50°F | 15 mph | NE | ⚡ 21 mph | 25% | Chance Rain Showers |
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 cloudy. Low around 56, with temperatures rising to around 58 overnight. West wind 5 to 8 mph.
Mostly cloudy. Low around 53, with temperatures rising to around 56 overnight. Northeast wind around 7 mph.
Partly sunny. High near 71, with temperatures falling to around 68 in the afternoon. Northeast wind 6 to 20 mph, with gusts as high as 28 mph.
A chance of rain showers. Mostly cloudy. Low around 47, with temperatures rising to around 49 overnight. Northeast wind 10 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Mostly sunny. High near 71, with temperatures falling to around 67 in the afternoon. Northeast wind 6 to 16 mph, with gusts as high as 26 mph.
A chance of rain. Mostly cloudy. Low around 41, with temperatures rising to around 43 overnight. Northeast wind 7 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
A chance of rain. Partly sunny, with a high near 60. East wind 7 to 12 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
A chance of rain. Mostly cloudy, with a low around 40.
Rain likely. Mostly cloudy, with a high near 57.
Rain likely. Mostly cloudy, with a low around 40.
A chance of rain. Partly sunny, with a high near 61.
Partly cloudy, with a low around 36.
Sunny, with a high near 59.
Mostly clear, with a low around 35.
Angostura Reservoir currently reports 57°F with wind velocity near 13 mph from the NE. 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 Angostura 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 Angostura 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 Angostura Reservoir Water Level & Temperature page.
View Angostura Reservoir Water Level & Temperature →