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Official National Weather Service (NWS) point forecast and real-time wind conditions for Grand Bayou Reservoir (Louisiana). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 91°F · Low 61°F
Peak gusts: 11 mph · Lake surface chop expected
Humidity: 63% · Barometer: 30.03 inHg
USGS water monitoring available for Grand Bayou Reservoir.
Excellent for boating (96/100), from 4 available inputs. Supporting this: Wind 5 mph from the southwest. Gusts to 9 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.
Good for fishing (85/100), from 5 available inputs. Supporting this: Wind 5 mph from the southwest. 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.
Excellent for kayaking (95/100), from 5 available inputs. Supporting this: Wind 5 mph from the southwest. Gusts to 9 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. Air temperature 90°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 3 PM | 90°F | 5 mph | SW | ⚡ 9 mph | 0% | Sunny |
| 4 PM | 91°F | 5 mph | SW | ⚡ 8 mph | 0% | Sunny |
| 5 PM | 90°F | 0 mph | — | ⚡ 8 mph | 0% | Sunny |
| 6 PM | 88°F | 0 mph | — | ⚡ 7 mph | 0% | Partly Cloudy |
| 7 PM | 83°F | 0 mph | — | ⚡ 7 mph | 0% | Mostly Cloudy |
| 8 PM | 78°F | 0 mph | — | ⚡ 6 mph | 0% | Mostly Cloudy |
| 9 PM | 76°F | 0 mph | — | ⚡ 6 mph | 0% | Partly Cloudy |
| 10 PM | 74°F | 0 mph | — | ⚡ 6 mph | 0% | Mostly Clear |
| 11 PM | 72°F | 0 mph | — | ⚡ 7 mph | 0% | Partly Cloudy |
| 12 AM | 71°F | 0 mph | — | ⚡ 8 mph | 0% | Mostly Clear |
| 1 AM | 69°F | 0 mph | — | ⚡ 8 mph | 0% | Mostly Clear |
| 2 AM | 67°F | 0 mph | — | ⚡ 8 mph | 0% | Mostly Clear |
| 3 AM | 66°F | 0 mph | — | ⚡ 7 mph | 0% | Clear |
| 4 AM | 64°F | 0 mph | — | ⚡ 7 mph | 0% | Clear |
| 5 AM | 63°F | 0 mph | — | ⚡ 6 mph | 0% | Clear |
| 6 AM | 62°F | 0 mph | — | ⚡ 5 mph | 0% | Sunny |
| 7 AM | 61°F | 0 mph | — | ⚡ 5 mph | 0% | Sunny |
| 8 AM | 63°F | 0 mph | — | ⚡ 6 mph | 0% | Sunny |
| 9 AM | 70°F | 0 mph | — | ⚡ 6 mph | 0% | Sunny |
| 10 AM | 76°F | 0 mph | — | ⚡ 7 mph | 0% | Sunny |
| 11 AM | 81°F | 5 mph | S | ⚡ 9 mph | 0% | Sunny |
| 12 PM | 85°F | 5 mph | S | ⚡ 12 mph | 0% | Sunny |
| 1 PM | 88°F | 5 mph | S | ⚡ 13 mph | 0% | Sunny |
| 2 PM | 90°F | 5 mph | S | ⚡ 13 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, with a high near 91. Southwest wind 0 to 5 mph.
Partly cloudy, with a low around 61. South wind around 0 mph.
Sunny, with a high near 93. South wind 0 to 5 mph.
Mostly clear, with a low around 70. South wind 0 to 5 mph.
A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. South wind 0 to 5 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Chance of precipitation is 20%.
Mostly sunny, with a high near 93.
Mostly clear, with a low around 66.
Sunny, with a high near 92.
Clear, with a low around 66.
Sunny, with a high near 87.
Partly cloudy, with a low around 57.
Sunny, with a high near 76.
Mostly clear, with a low around 50.
Grand Bayou Reservoir currently reports 72°F with wind velocity near 3 mph from the W. 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 Grand Bayou 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 SHV) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Grand Bayou 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 Grand Bayou Reservoir Water Level & Temperature page.
View Grand Bayou Reservoir Water Level & Temperature →