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Official National Weather Service (NWS) point forecast and real-time wind conditions for John W. Flannagan Reservoir (Virginia). 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: 5 mph · Lake surface chop expected
Humidity: 62% · Barometer: 29.98 inHg
USGS water monitoring available for John W. Flannagan Reservoir.
Excellent for boating (99/100), from 4 available inputs. Supporting this: Wind 1 mph from the southeast. Gusts to 5 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 (86/100), from 5 available inputs. Supporting this: Wind 1 mph from the southeast. 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 (98/100), from 5 available inputs. Supporting this: Wind 1 mph from the southeast. Gusts to 5 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. 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 |
|---|---|---|---|---|---|---|
| 10 AM | 58°F | 1 mph | SE | ⚡ 5 mph | 0% | Mostly Cloudy |
| 11 AM | 65°F | 2 mph | E | ⚡ 5 mph | 0% | Mostly Cloudy |
| 12 PM | 71°F | 2 mph | NE | ⚡ 7 mph | 0% | Mostly Cloudy |
| 1 PM | 74°F | 3 mph | NE | ⚡ 8 mph | 0% | Mostly Cloudy |
| 2 PM | 76°F | 5 mph | NE | ⚡ 8 mph | 1% | Mostly Cloudy |
| 3 PM | 76°F | 5 mph | NE | ⚡ 8 mph | 1% | Mostly Cloudy |
| 4 PM | 76°F | 3 mph | NE | ⚡ 8 mph | 1% | Mostly Cloudy |
| 5 PM | 74°F | 3 mph | NE | ⚡ 8 mph | 1% | Mostly Cloudy |
| 6 PM | 71°F | 3 mph | NE | ⚡ 7 mph | 1% | Mostly Cloudy |
| 7 PM | 66°F | 3 mph | NE | ⚡ 7 mph | 1% | Mostly Cloudy |
| 8 PM | 63°F | 3 mph | NE | ⚡ 8 mph | 0% | Mostly Cloudy |
| 9 PM | 61°F | 3 mph | E | ⚡ 7 mph | 0% | Mostly Cloudy |
| 10 PM | 59°F | 3 mph | E | ⚡ 7 mph | 0% | Mostly Cloudy |
| 11 PM | 58°F | 3 mph | SE | ⚡ 7 mph | 0% | Cloudy |
| 12 AM | 58°F | 3 mph | E | ⚡ 7 mph | 0% | Cloudy |
| 1 AM | 58°F | 3 mph | E | ⚡ 7 mph | 0% | Cloudy |
| 2 AM | 57°F | 3 mph | E | ⚡ 7 mph | 0% | Cloudy |
| 3 AM | 56°F | 3 mph | E | ⚡ 8 mph | 1% | Cloudy |
| 4 AM | 56°F | 3 mph | SE | ⚡ 8 mph | 1% | Cloudy |
| 5 AM | 56°F | 5 mph | E | ⚡ 9 mph | 1% | Cloudy |
| 6 AM | 55°F | 5 mph | E | ⚡ 12 mph | 1% | Cloudy |
| 7 AM | 56°F | 5 mph | E | ⚡ 13 mph | 2% | Cloudy |
| 8 AM | 56°F | 7 mph | E | ⚡ 15 mph | 10% | Cloudy |
| 9 AM | 55°F | 9 mph | E | ⚡ 20 mph | 16% | Slight 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, with a high near 76. East wind 1 to 5 mph.
Cloudy, with a low around 55. East wind around 5 mph.
Rain showers likely after 9am. Cloudy, with a high near 66. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Rain showers likely before 2am, then showers and thunderstorms likely. Mostly cloudy, with a low around 57. Southeast wind around 16 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 75. South wind around 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Rain showers. Cloudy, with a low around 57. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers before 2pm. Partly sunny, with a high near 71. Chance of precipitation is 50%.
Partly cloudy, with a low around 55.
Sunny, with a high near 80.
A slight chance of rain showers between 8pm and 2am. Mostly clear, with a low around 55.
Mostly sunny, with a high near 77.
Mostly clear, with a low around 54.
Mostly sunny, with a high near 80.
Partly cloudy, with a low around 55.
John W. Flannagan Reservoir currently reports 60°F with wind velocity near 2 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 John W. Flannagan 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 RLX) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for John W. Flannagan 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 John W. Flannagan Reservoir Water Level & Temperature page.
View John W. Flannagan Reservoir Water Level & Temperature →