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Official National Weather Service (NWS) point forecast and real-time wind conditions for Allegheny Reservoir (Pennsylvania). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 59°F · Low 39°F
Peak gusts: 15 mph · Lake surface chop expected
Humidity: 38% · Barometer: 29.98 inHg
USGS water monitoring available for Allegheny Reservoir.
Excellent for boating (97/100), from 4 available inputs. Supporting this: Wind 5 mph from the northwest. Gusts to 7 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.
Excellent for fishing (97/100), from 5 available inputs. Supporting this: Wind 5 mph from the northwest. Dusk hours (18:00 local). 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 (96/100), from 5 available inputs. Supporting this: Wind 5 mph from the northwest. Gusts to 7 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 |
|---|---|---|---|---|---|---|
| 6 PM | 58°F | 5 mph | NW | ⚡ 7 mph | 0% | Partly Cloudy |
| 7 PM | 53°F | 3 mph | NW | ⚡ 5 mph | 0% | Partly Cloudy |
| 8 PM | 49°F | 2 mph | NW | ⚡ 4 mph | 0% | Partly Cloudy |
| 9 PM | 48°F | 1 mph | NW | ⚡ 2 mph | 0% | Partly Cloudy |
| 10 PM | 47°F | 1 mph | N | ⚡ 2 mph | 0% | Partly Cloudy |
| 11 PM | 45°F | 1 mph | E | ⚡ 2 mph | 0% | Partly Cloudy |
| 12 AM | 44°F | 1 mph | SE | ⚡ 2 mph | 1% | Mostly Cloudy |
| 1 AM | 43°F | 2 mph | SE | ⚡ 5 mph | 1% | Mostly Cloudy |
| 2 AM | 42°F | 2 mph | SE | ⚡ 6 mph | 1% | Mostly Cloudy |
| 3 AM | 41°F | 2 mph | SE | ⚡ 6 mph | 1% | Mostly Cloudy |
| 4 AM | 41°F | 3 mph | SE | ⚡ 6 mph | 1% | Mostly Cloudy |
| 5 AM | 40°F | 3 mph | E | ⚡ 7 mph | 1% | Mostly Cloudy |
| 6 AM | 40°F | 3 mph | E | ⚡ 8 mph | 1% | Partly Sunny |
| 7 AM | 39°F | 5 mph | SE | ⚡ 9 mph | 1% | Partly Sunny |
| 8 AM | 42°F | 5 mph | SE | ⚡ 10 mph | 1% | Partly Sunny |
| 9 AM | 46°F | 5 mph | SE | ⚡ 10 mph | 1% | Partly Sunny |
| 10 AM | 54°F | 5 mph | SE | ⚡ 10 mph | 1% | Partly Sunny |
| 11 AM | 59°F | 6 mph | SE | ⚡ 13 mph | 1% | Partly Sunny |
| 12 PM | 63°F | 6 mph | SE | ⚡ 13 mph | 1% | Partly Sunny |
| 1 PM | 66°F | 7 mph | SE | ⚡ 15 mph | 1% | Partly Sunny |
| 2 PM | 67°F | 7 mph | SE | ⚡ 15 mph | 1% | Partly Sunny |
| 3 PM | 67°F | 7 mph | SE | ⚡ 15 mph | 1% | Partly Sunny |
| 4 PM | 67°F | 7 mph | SE | ⚡ 15 mph | 1% | Partly Sunny |
| 5 PM | 66°F | 7 mph | SE | ⚡ 15 mph | 1% | 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.
Partly cloudy, with a low around 39. East wind 1 to 5 mph.
Partly sunny, with a high near 67. Southeast wind 3 to 7 mph.
A chance of rain after 4am. Mostly cloudy, with a low around 50. Southeast wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Rain. Cloudy, with a high near 59. Southeast wind 10 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Rain. Cloudy, with a low around 55. East wind 2 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain before 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 20%.
A chance of rain showers after 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 30%.
A chance of rain showers before 8am, then showers and thunderstorms likely. Mostly cloudy, with a high near 67. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
A slight chance of rain showers before 8am. Partly sunny, with a high near 59.
Partly cloudy, with a low around 40.
A chance of rain showers after 8am. Mostly sunny, with a high near 60. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.
Rain showers likely. Mostly cloudy, with a high near 59.
Allegheny Reservoir currently reports 64°F with wind velocity near 9 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 Allegheny 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 CTP) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Allegheny 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 Allegheny Reservoir Water Level & Temperature page.
View Allegheny Reservoir Water Level & Temperature →