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Official National Weather Service (NWS) point forecast and real-time wind conditions for Watts Bar Lake (Tennessee). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 70°F · Low 58°F
Peak gusts: 4 mph · Lake surface chop expected
Humidity: 97% · Barometer: 29.99 inHg
USGS water monitoring available for Watts Bar Lake.
Good for boating (89/100), from 4 available inputs. Supporting this: Wind 5 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.
Good for fishing (80/100), from 5 available inputs. Supporting this: Wind 5 mph from the southwest. Sky is cloudy (85% 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.
Good for kayaking (89/100), from 5 available inputs. Supporting this: Wind 5 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. Wind 5 mph from the southwest. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 11 AM | 65°F | 5 mph | SW | ⚡ 14 mph | 37% | Chance Rain Showers |
| 12 PM | 66°F | 5 mph | SW | ⚡ 15 mph | 34% | Chance Rain Showers |
| 1 PM | 68°F | 10 mph | W | ⚡ 17 mph | 49% | Chance Rain Showers |
| 2 PM | 68°F | 10 mph | W | ⚡ 18 mph | 26% | Chance Rain Showers |
| 3 PM | 69°F | 10 mph | W | ⚡ 20 mph | 15% | Slight Chance Rain Showers |
| 4 PM | 70°F | 10 mph | W | ⚡ 18 mph | 14% | Mostly Cloudy |
| 5 PM | 69°F | 10 mph | W | ⚡ 17 mph | 16% | Slight Chance Rain Showers |
| 6 PM | 70°F | 5 mph | W | ⚡ 16 mph | 14% | Mostly Cloudy |
| 7 PM | 68°F | 5 mph | W | ⚡ 15 mph | 9% | Mostly Cloudy |
| 8 PM | 65°F | 0 mph | — | ⚡ 13 mph | 3% | Mostly Cloudy |
| 9 PM | 64°F | 0 mph | — | ⚡ 10 mph | 2% | Mostly Cloudy |
| 10 PM | 63°F | 0 mph | — | ⚡ 8 mph | 2% | Partly Cloudy |
| 11 PM | 63°F | 0 mph | — | ⚡ 6 mph | 1% | Partly Cloudy |
| 12 AM | 61°F | 0 mph | — | ⚡ 6 mph | 1% | Mostly Clear |
| 1 AM | 61°F | 0 mph | — | ⚡ 5 mph | 0% | Mostly Clear |
| 2 AM | 60°F | 0 mph | — | ⚡ 5 mph | 0% | Mostly Clear |
| 3 AM | 59°F | 0 mph | — | ⚡ 4 mph | 0% | Mostly Clear |
| 4 AM | 58°F | 0 mph | — | ⚡ 4 mph | 0% | Partly Cloudy |
| 5 AM | 57°F | 0 mph | — | ⚡ 4 mph | 0% | Partly Cloudy |
| 6 AM | 57°F | 0 mph | — | ⚡ 4 mph | 0% | Mostly Sunny |
| 7 AM | 56°F | 0 mph | — | ⚡ 4 mph | 0% | Partly Sunny |
| 8 AM | 56°F | 0 mph | — | ⚡ 4 mph | 0% | Partly Sunny |
| 9 AM | 60°F | 0 mph | — | ⚡ 4 mph | 0% | Partly Sunny |
| 10 AM | 65°F | 0 mph | — | ⚡ 4 mph | 0% | Partly 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.
A chance of rain showers. Mostly cloudy, with a high near 70. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Partly cloudy, with a low around 55. West wind 0 to 5 mph.
Mostly sunny, with a high near 83. Southwest wind around 0 mph.
Mostly clear, with a low around 56. Wind around 0 mph.
Sunny, with a high near 86. Southwest wind 0 to 5 mph.
Mostly clear, with a low around 58. West wind around 0 mph.
Sunny, with a high near 87. Southwest wind around 0 mph.
Mostly clear, with a low around 62.
Sunny, with a high near 86.
Mostly clear, with a low around 61.
Mostly sunny, with a high near 81.
Partly cloudy, with a low around 50.
Mostly sunny, with a high near 66.
Mostly clear, with a low around 42.
Watts Bar Lake currently reports 63°F with wind velocity near 3 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 Watts Bar 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 MRX) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Watts Bar 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 Watts Bar Lake Water Level & Temperature page.
View Watts Bar Lake Water Level & Temperature →