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Official National Weather Service (NWS) point forecast and real-time wind conditions for Lake Sunapee (New Hampshire). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 59°F · Low 41°F
Peak gusts: 29 mph · Lake surface chop expected
Humidity: 52% · Barometer: 29.90 inHg
USGS water monitoring available for Lake Sunapee.
Fair for boating (70/100), from 4 available inputs. Supporting this: No active official alerts for this lake. 15% 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.
Good for fishing (77/100), from 5 available inputs. Supporting this: 15% chance of precipitation. Sky is clear (9% 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 (69/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 15% 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. 15% 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 |
|---|---|---|---|---|---|---|
| 4 PM | 59°F | 15 mph | W | ⚡ 27 mph | 15% | Isolated Rain Showers |
| 5 PM | 58°F | 15 mph | W | ⚡ 25 mph | 11% | Sunny |
| 6 PM | 58°F | 10 mph | W | ⚡ 23 mph | 0% | Clear |
| 7 PM | 55°F | 10 mph | W | ⚡ 20 mph | 4% | Mostly Clear |
| 8 PM | 49°F | 10 mph | W | ⚡ 16 mph | 7% | Partly Cloudy |
| 9 PM | 48°F | 10 mph | W | ⚡ 16 mph | 23% | Slight Chance Rain Showers |
| 10 PM | 46°F | 10 mph | W | ⚡ 16 mph | 5% | Partly Cloudy |
| 11 PM | 46°F | 10 mph | W | ⚡ 16 mph | 2% | Partly Cloudy |
| 12 AM | 45°F | 10 mph | NW | ⚡ 16 mph | 0% | Partly Cloudy |
| 1 AM | 44°F | 10 mph | NW | ⚡ 17 mph | 0% | Mostly Clear |
| 2 AM | 43°F | 10 mph | NW | ⚡ 17 mph | 0% | Mostly Clear |
| 3 AM | 43°F | 10 mph | NW | ⚡ 17 mph | 0% | Mostly Clear |
| 4 AM | 42°F | 10 mph | NW | ⚡ 16 mph | 1% | Mostly Clear |
| 5 AM | 42°F | 10 mph | NW | ⚡ 16 mph | 4% | Mostly Clear |
| 6 AM | 41°F | 5 mph | W | ⚡ 14 mph | 0% | Sunny |
| 7 AM | 41°F | 5 mph | W | ⚡ 14 mph | 0% | Sunny |
| 8 AM | 42°F | 5 mph | W | ⚡ 12 mph | 0% | Sunny |
| 9 AM | 45°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 10 AM | 46°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 11 AM | 49°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 12 PM | 52°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 1 PM | 54°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 2 PM | 55°F | 5 mph | NW | ⚡ 12 mph | 0% | Sunny |
| 3 PM | 56°F | 5 mph | NW | ⚡ 12 mph | 0% | 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.
Isolated rain showers before 5pm. Sunny, with a high near 59. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
A slight chance of rain showers between 9pm and 10pm. Mostly clear, with a low around 40. West wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunny, with a high near 57. Northwest wind around 5 mph.
Partly cloudy, with a low around 41. East wind around 0 mph.
Partly sunny, with a high near 61. South wind 0 to 5 mph.
Rain. Cloudy, with a low around 51. Chance of precipitation is 100%.
Rain before 1pm. Partly sunny, with a high near 64. Chance of precipitation is 80%.
A chance of rain showers after 2am. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Rain showers likely. Mostly cloudy, with a high near 59. Chance of precipitation is 70%.
Rain showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
A chance of rain showers before 11am. Partly sunny, with a high near 54. Chance of precipitation is 30%.
Partly cloudy, with a low around 40.
Sunny, with a high near 54.
Partly cloudy, with a low around 42.
Lake Sunapee currently reports 56°F with wind velocity near 16 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 Lake Sunapee 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 GYX) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Lake Sunapee 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 Sunapee Water Level & Temperature page.
View Lake Sunapee Water Level & Temperature →