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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake Hopatcong (New Jersey). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 59°F · Low 53°F
Peak gusts: 15 mph · Lake surface chop expected
Humidity: 88% · Barometer: 29.85 inHg
USGS water monitoring available for Lake Hopatcong.
Excellent for boating (95/100), from 4 available inputs. Supporting this: Wind 5 mph from the east. 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.
Excellent for fishing (92/100), from 5 available inputs. Supporting this: Wind 5 mph from the east. Dawn hours (06:00 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 (93/100), from 5 available inputs. Supporting this: Wind 5 mph from the east. Gusts to 12 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. 3% chance of precipitation. Working against it: Air temperature 53°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 AM | 53°F | 5 mph | E | ⚡ 12 mph | 3% | Cloudy |
| 7 AM | 53°F | 5 mph | E | ⚡ 13 mph | 4% | Cloudy |
| 8 AM | 54°F | 5 mph | E | ⚡ 14 mph | 42% | Chance Light Rain |
| 9 AM | 56°F | 10 mph | E | ⚡ 16 mph | 59% | Rain Likely |
| 10 AM | 57°F | 10 mph | E | ⚡ 18 mph | 81% | Rain |
| 11 AM | 58°F | 10 mph | E | ⚡ 20 mph | 96% | Rain |
| 12 PM | 59°F | 10 mph | E | ⚡ 20 mph | 93% | Rain |
| 1 PM | 59°F | 10 mph | E | ⚡ 21 mph | 88% | Rain |
| 2 PM | 59°F | 10 mph | E | ⚡ 22 mph | 88% | Rain |
| 3 PM | 59°F | 10 mph | E | ⚡ 22 mph | 96% | Rain |
| 4 PM | 59°F | 10 mph | E | ⚡ 23 mph | 98% | Rain |
| 5 PM | 59°F | 10 mph | E | ⚡ 23 mph | 99% | Rain |
| 6 PM | 58°F | 10 mph | E | ⚡ 24 mph | 90% | Rain |
| 7 PM | 58°F | 10 mph | E | ⚡ 24 mph | 74% | Rain Likely |
| 8 PM | 58°F | 10 mph | E | ⚡ 21 mph | 77% | Light Rain |
| 9 PM | 58°F | 10 mph | E | ⚡ 20 mph | 70% | Light Rain Likely |
| 10 PM | 57°F | 10 mph | E | ⚡ 17 mph | 59% | Light Rain Likely |
| 11 PM | 57°F | 5 mph | NE | ⚡ 15 mph | 57% | Light Rain Likely |
| 12 AM | 57°F | 5 mph | NE | ⚡ 15 mph | 38% | Chance Showers And Thunderstorms |
| 1 AM | 57°F | 5 mph | NE | ⚡ 15 mph | 35% | Chance Showers And Thunderstorms |
| 2 AM | 56°F | 5 mph | NE | ⚡ 15 mph | 22% | Slight Chance Rain Showers |
| 3 AM | 56°F | 5 mph | N | ⚡ 16 mph | 20% | Slight Chance Rain Showers |
| 4 AM | 56°F | 10 mph | N | ⚡ 16 mph | 16% | Slight Chance Rain Showers |
| 5 AM | 56°F | 10 mph | N | ⚡ 17 mph | 13% | 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.
Mostly cloudy, with a low around 50. East wind around 5 mph.
Cloudy, with a low around 50. East wind around 5 mph.
Rain between 8am and 5pm, then rain and a slight chance of thunderstorms. Cloudy, with a high near 60. East wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Rain and a slight chance of thunderstorms before midnight, then a chance of showers and thunderstorms between midnight and 5am. Cloudy, with a low around 53. Northeast wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Mostly sunny, with a high near 70. North wind 5 to 10 mph. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 52. North wind 0 to 5 mph.
Mostly sunny, with a high near 71.
A slight chance of rain showers between 8pm and 2am. Partly cloudy, with a low around 59.
Sunny, with a high near 72.
Mostly clear, with a low around 48.
Mostly sunny, with a high near 63.
A chance of rain showers after 2am. Partly cloudy, with a low around 46. Chance of precipitation is 30%.
Rain showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
A chance of rain showers. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.
Lake Hopatcong currently reports 53°F with wind velocity near 7 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 Lake Hopatcong 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 Hopatcong 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 Hopatcong Water Level & Temperature page.
View Lake Hopatcong Water Level & Temperature →