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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 67°F · Low 46°F
Peak gusts: 24 mph · Lake surface chop expected
Humidity: 39% · Barometer: 29.90 inHg
USGS water monitoring available for Lake Hopatcong.
Good for boating (75/100), from 4 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. 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 (74/100), from 5 available inputs. Supporting this: 0% chance of precipitation. Sky is clear (3% 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.
Fair for kayaking (74/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 0% chance of precipitation. 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. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 1 PM | 65°F | 15 mph | W | ⚡ 23 mph | 0% | Sunny |
| 2 PM | 66°F | 15 mph | NW | ⚡ 23 mph | 0% | Sunny |
| 3 PM | 66°F | 10 mph | NW | ⚡ 22 mph | 0% | Sunny |
| 4 PM | 67°F | 10 mph | NW | ⚡ 20 mph | 0% | Sunny |
| 5 PM | 65°F | 10 mph | NW | ⚡ 17 mph | 0% | Sunny |
| 6 PM | 63°F | 10 mph | NW | ⚡ 15 mph | 0% | Partly Cloudy |
| 7 PM | 58°F | 5 mph | W | ⚡ 12 mph | 0% | Partly Cloudy |
| 8 PM | 55°F | 5 mph | W | ⚡ 10 mph | 0% | Mostly Cloudy |
| 9 PM | 54°F | 5 mph | W | ⚡ 8 mph | 0% | Mostly Cloudy |
| 10 PM | 52°F | 5 mph | W | ⚡ 7 mph | 0% | Mostly Cloudy |
| 11 PM | 51°F | 5 mph | W | ⚡ 7 mph | 0% | Mostly Cloudy |
| 12 AM | 50°F | 5 mph | W | ⚡ 7 mph | 0% | Mostly Cloudy |
| 1 AM | 50°F | 5 mph | W | ⚡ 7 mph | 0% | Mostly Cloudy |
| 2 AM | 48°F | 5 mph | NW | ⚡ 9 mph | 0% | Partly Cloudy |
| 3 AM | 48°F | 5 mph | NW | ⚡ 9 mph | 0% | Partly Cloudy |
| 4 AM | 48°F | 5 mph | NW | ⚡ 8 mph | 0% | Partly Cloudy |
| 5 AM | 47°F | 5 mph | NW | ⚡ 8 mph | 0% | Partly Cloudy |
| 6 AM | 46°F | 5 mph | N | ⚡ 8 mph | 0% | Mostly Sunny |
| 7 AM | 46°F | 5 mph | N | ⚡ 9 mph | 0% | Partly Sunny |
| 8 AM | 47°F | 5 mph | N | ⚡ 10 mph | 0% | Partly Sunny |
| 9 AM | 51°F | 5 mph | N | ⚡ 9 mph | 0% | Mostly Sunny |
| 10 AM | 56°F | 5 mph | N | ⚡ 9 mph | 0% | Mostly Sunny |
| 11 AM | 61°F | 5 mph | N | ⚡ 8 mph | 0% | Mostly Sunny |
| 12 PM | 63°F | 5 mph | N | ⚡ 6 mph | 0% | Mostly 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.
Sunny, with a high near 68. West wind 10 to 15 mph.
Partly cloudy, with a low around 46. West wind 5 to 10 mph.
Mostly sunny, with a high near 68. Northeast wind 0 to 5 mph.
Mostly cloudy, with a low around 51. East wind around 5 mph.
Rain showers after 8am. Cloudy, with a high near 62. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Rain showers. Cloudy, with a low around 56. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Rain showers likely before 8am. Partly sunny, with a high near 69. Chance of precipitation is 60%.
Partly cloudy, with a low around 55.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 70.
A slight chance of rain showers before 2am. Mostly cloudy, with a low around 52.
Mostly sunny, with a high near 64.
Mostly clear, with a low around 46.
Mostly sunny, with a high near 62.
Partly cloudy, with a low around 49.
Lake Hopatcong currently reports 65°F with wind velocity near 13 mph from the NW. 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 →