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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake Harmony (Pennsylvania). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 57°F · Low 47°F
Peak gusts: 13 mph · Lake surface chop expected
Humidity: 81% · Barometer: 29.86 inHg
USGS water monitoring available for Lake Harmony.
Fair for boating (68/100), from 4 available inputs. Supporting this: Wind 5 mph from the southeast. No active official alerts for this lake. The forecast mentions thunderstorms, which carries a risk penalty. 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.
Fair for fishing (58/100), from 5 available inputs. Supporting this: Wind 5 mph from the southeast. 0% chance of precipitation. The forecast mentions thunderstorms, which carries a risk penalty. 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.
Fair for kayaking (66/100), from 5 available inputs. Supporting this: Wind 5 mph from the southeast. No active official alerts for this lake. The forecast mentions thunderstorms, which carries a risk penalty. 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 47°F. The forecast mentions thunderstorms, which carries a risk penalty. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 2 AM | 47°F | 5 mph | SE | ⚡ 14 mph | 0% | Mostly Cloudy |
| 3 AM | 47°F | 5 mph | SE | ⚡ 15 mph | 1% | Mostly Cloudy |
| 4 AM | 48°F | 5 mph | SE | ⚡ 17 mph | 1% | Mostly Cloudy |
| 5 AM | 48°F | 10 mph | SE | ⚡ 18 mph | 2% | Cloudy |
| 6 AM | 48°F | 10 mph | SE | ⚡ 18 mph | 5% | Cloudy |
| 7 AM | 49°F | 10 mph | SE | ⚡ 21 mph | 10% | Cloudy |
| 8 AM | 50°F | 10 mph | SE | ⚡ 22 mph | 56% | Rain Likely |
| 9 AM | 52°F | 10 mph | E | ⚡ 23 mph | 73% | Rain Likely |
| 10 AM | 53°F | 10 mph | SE | ⚡ 25 mph | 86% | Rain |
| 11 AM | 54°F | 10 mph | SE | ⚡ 25 mph | 82% | Rain |
| 12 PM | 55°F | 15 mph | SE | ⚡ 27 mph | 93% | Rain |
| 1 PM | 56°F | 15 mph | SE | ⚡ 29 mph | 94% | Rain |
| 2 PM | 56°F | 15 mph | SE | ⚡ 29 mph | 100% | Rain |
| 3 PM | 56°F | 15 mph | SE | ⚡ 30 mph | 94% | Rain |
| 4 PM | 56°F | 15 mph | E | ⚡ 31 mph | 87% | Rain |
| 5 PM | 57°F | 15 mph | E | ⚡ 31 mph | 86% | Rain |
| 6 PM | 56°F | 15 mph | E | ⚡ 31 mph | 100% | Rain |
| 7 PM | 56°F | 15 mph | E | ⚡ 29 mph | 84% | Rain |
| 8 PM | 55°F | 15 mph | E | ⚡ 25 mph | 69% | Showers And Thunderstorms Likely |
| 9 PM | 55°F | 15 mph | E | ⚡ 25 mph | 50% | Chance Showers And Thunderstorms |
| 10 PM | 55°F | 10 mph | E | ⚡ 23 mph | 32% | Chance Showers And Thunderstorms |
| 11 PM | 55°F | 10 mph | E | ⚡ 21 mph | 13% | Cloudy |
| 12 AM | 55°F | 10 mph | E | ⚡ 21 mph | 19% | Slight Chance Showers And Thunderstorms |
| 1 AM | 55°F | 10 mph | NE | ⚡ 18 mph | 18% | Slight Chance Showers And Thunderstorms |
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 low around 47. Southeast wind 5 to 10 mph.
Rain between 8am and 5pm, then rain and a slight chance of thunderstorms. Cloudy, with a high near 57. Southeast wind 10 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Rain and a slight chance of thunderstorms before 8pm, then showers and thunderstorms likely between 8pm and 11pm, then a slight chance of showers and thunderstorms between midnight and 2am. Cloudy, with a low around 53. Northeast wind 5 to 15 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
A slight chance of rain showers before 7am. Partly sunny, with a high near 66. North wind 5 to 10 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 51. West wind 0 to 5 mph.
Partly sunny, with a high near 68.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 56.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 66.
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 47.
Mostly sunny, with a high near 60.
A chance of rain showers after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a high near 58. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.
A slight chance of rain showers. Partly sunny, with a high near 52.
Lake Harmony currently reports 52°F with wind velocity near 8 mph from the SE. 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 Lake Harmony 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 PHI) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lake Harmony 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 Lake Harmony Water Level & Temperature page.
View Lake Harmony Water Level & Temperature →