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Official National Weather Service (NWS) point forecast and real-time wind conditions for Blue Marsh Lake (Pennsylvania). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 71°F · Low 57°F
Peak gusts: 27 mph · Lake surface chop expected
Humidity: 91% · Barometer: 29.87 inHg
Live hydrological sensor reading for Blue Marsh Lake.
Poor for boating (40/100), from 4 available inputs. Supporting this: No active official alerts for this lake. Working against it: 83% chance of precipitation is likely. 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.
Poor for fishing (50/100), from 6 available inputs. Supporting this: Measured water temperature 64°F from a representative gauge 0.8 mi away. Provisional data. Dusk hours (20:00 local). Working against it: 83% chance of precipitation is likely. The forecast mentions thunderstorms, which carries a risk penalty. Not available from a verified source for this lake: pressure trend. Confidence is moderate (72%) because some inputs are unavailable or older than ideal.
Poor for kayaking (41/100), from 5 available inputs. Supporting this: No active official alerts for this lake. Air temperature 62°F. Working against it: 83% chance of precipitation is likely. The forecast mentions thunderstorms, which carries a risk penalty. Confidence is high (90%).
Poor for swimming (40/100), from 5 available inputs. Supporting this: No active official alerts for this lake. Wind 15 mph from the east. Working against it: 83% chance of precipitation is likely. The forecast mentions thunderstorms, which carries a risk penalty. Confidence is moderate (75%) because some inputs are unavailable or older than ideal.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 8 PM | 62°F | 15 mph | E | ⚡ 23 mph | 83% | Showers And Thunderstorms |
| 9 PM | 60°F | 15 mph | NE | ⚡ 22 mph | 77% | Showers And Thunderstorms |
| 10 PM | 60°F | 15 mph | NE | ⚡ 20 mph | 71% | Showers And Thunderstorms Likely |
| 11 PM | 60°F | 10 mph | NE | ⚡ 17 mph | 65% | Showers And Thunderstorms Likely |
| 12 AM | 60°F | 10 mph | NE | ⚡ 17 mph | 63% | Showers And Thunderstorms Likely |
| 1 AM | 60°F | 10 mph | NE | ⚡ 16 mph | 62% | Showers And Thunderstorms Likely |
| 2 AM | 60°F | 10 mph | NE | ⚡ 16 mph | 61% | Rain Showers Likely |
| 3 AM | 59°F | 10 mph | NE | ⚡ 16 mph | 50% | Chance Rain Showers |
| 4 AM | 58°F | 10 mph | NE | ⚡ 15 mph | 39% | Chance Rain Showers |
| 5 AM | 58°F | 10 mph | NE | ⚡ 15 mph | 28% | Chance Rain Showers |
| 6 AM | 58°F | 10 mph | N | ⚡ 14 mph | 20% | Slight Chance Rain Showers |
| 7 AM | 57°F | 5 mph | N | ⚡ 12 mph | 13% | Mostly Cloudy |
| 8 AM | 59°F | 5 mph | N | ⚡ 12 mph | 5% | Partly Sunny |
| 9 AM | 59°F | 5 mph | N | ⚡ 13 mph | 4% | Partly Sunny |
| 10 AM | 63°F | 5 mph | N | ⚡ 13 mph | 4% | Partly Sunny |
| 11 AM | 66°F | 5 mph | N | ⚡ 14 mph | 3% | Mostly Sunny |
| 12 PM | 68°F | 10 mph | N | ⚡ 15 mph | 2% | Mostly Sunny |
| 1 PM | 71°F | 10 mph | N | ⚡ 16 mph | 1% | Mostly Sunny |
| 2 PM | 72°F | 10 mph | N | ⚡ 17 mph | 1% | Mostly Sunny |
| 3 PM | 73°F | 10 mph | N | ⚡ 18 mph | 1% | Mostly Sunny |
| 4 PM | 74°F | 10 mph | NW | ⚡ 16 mph | 0% | Sunny |
| 5 PM | 72°F | 10 mph | NW | ⚡ 14 mph | 0% | Mostly Sunny |
| 6 PM | 71°F | 5 mph | NW | ⚡ 10 mph | 1% | Partly Cloudy |
| 7 PM | 68°F | 5 mph | NW | ⚡ 9 mph | 1% | Mostly Cloudy |
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.
Showers and thunderstorms. Cloudy, with a low around 57. Northeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 74. North wind 5 to 10 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
Partly cloudy, with a low around 53. Northwest wind 0 to 5 mph.
Mostly sunny, with a high near 77. Southwest wind 0 to 10 mph.
Mostly clear, with a low around 61. Southwest wind 5 to 10 mph.
Mostly sunny, with a high near 77.
A slight chance of rain showers between 8pm and 2am. Mostly cloudy, with a low around 56.
Mostly sunny, with a high near 67.
Rain showers likely after 2am. Partly cloudy, with a low around 52. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
A slight chance of rain showers before 8am. Partly sunny, with a high near 54.
Partly cloudy, with a low around 35.
Sunny, with a high near 54.
Blue Marsh Lake currently reports 59°F with wind velocity near 13 mph from the E. 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 Blue Marsh 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 PHI) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Blue Marsh 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 Blue Marsh Lake Water Level & Temperature page.
View Blue Marsh Lake Water Level & Temperature →