Loading page content…
Loading page content…
Loading lake conditions…
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 42°F
Peak gusts: 2 mph · Lake surface chop expected
Humidity: 61% · Barometer: 29.94 inHg
USGS water monitoring available for Lake Sunapee.
Excellent for boating (97/100), from 4 available inputs. Supporting this: Wind 5 mph from the southeast. Gusts to 6 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 (90/100), from 5 available inputs. Supporting this: Wind 5 mph from the southeast. Morning hours (08:00 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 (95/100), from 5 available inputs. Supporting this: Wind 5 mph from the southeast. Gusts to 6 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 42°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 8 AM | 42°F | 5 mph | SE | ⚡ 6 mph | 0% | Mostly Cloudy |
| 9 AM | 43°F | 5 mph | S | ⚡ 6 mph | 5% | Mostly Cloudy |
| 10 AM | 47°F | 5 mph | S | ⚡ 9 mph | 4% | Mostly Cloudy |
| 11 AM | 49°F | 5 mph | S | ⚡ 10 mph | 6% | Cloudy |
| 12 PM | 51°F | 0 mph | — | ⚡ 9 mph | 25% | Chance Light Rain |
| 1 PM | 58°F | 5 mph | S | ⚡ 9 mph | 35% | Chance Light Rain |
| 2 PM | 59°F | 5 mph | S | ⚡ 10 mph | 39% | Chance Light Rain |
| 3 PM | 58°F | 5 mph | S | ⚡ 9 mph | 44% | Chance Light Rain |
| 4 PM | 59°F | 5 mph | S | ⚡ 10 mph | 49% | Chance Light Rain |
| 5 PM | 58°F | 0 mph | — | ⚡ 9 mph | 53% | Chance Light Rain |
| 6 PM | 57°F | 0 mph | — | ⚡ 9 mph | 58% | Light Rain Likely |
| 7 PM | 56°F | 5 mph | SE | ⚡ 10 mph | 63% | Rain Showers Likely |
| 8 PM | 54°F | 5 mph | SE | ⚡ 14 mph | 86% | Rain Showers |
| 9 PM | 53°F | 0 mph | — | ⚡ 10 mph | 94% | Rain Showers |
| 10 PM | 52°F | 0 mph | — | ⚡ 10 mph | 95% | Rain Showers |
| 11 PM | 52°F | 0 mph | — | ⚡ 9 mph | 92% | Rain Showers |
| 12 AM | 52°F | 0 mph | — | ⚡ 9 mph | 95% | Rain Showers |
| 1 AM | 52°F | 0 mph | — | ⚡ 8 mph | 98% | Rain Showers |
| 2 AM | 52°F | 0 mph | — | ⚡ 5 mph | 78% | Rain Showers |
| 3 AM | 51°F | 0 mph | — | ⚡ 5 mph | 62% | Rain Showers Likely |
| 4 AM | 51°F | 0 mph | — | ⚡ 2 mph | 41% | Areas Of Fog |
| 5 AM | 51°F | 0 mph | — | ⚡ 2 mph | 18% | Areas Of Fog |
| 6 AM | 49°F | 0 mph | — | ⚡ 5 mph | 26% | Areas Of Fog |
| 7 AM | 50°F | 0 mph | — | ⚡ 5 mph | 15% | Areas Of Fog |
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.
A chance of rain after noon. Mostly cloudy, with a high near 60. South wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Rain likely before 7pm, then rain showers between 7pm and 1am, then rain showers and areas of fog between 1am and 4am, then areas of fog and a chance of rain showers. Cloudy, with a low around 47. East wind 0 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Areas of fog and a chance of rain showers before 8am. Mostly sunny, with a high near 66. Northwest wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain after 1am. Mostly cloudy, with a low around 48. North wind 0 to 10 mph. Chance of precipitation is 40%.
Rain likely. Cloudy, with a high near 59. Southeast wind 5 to 10 mph. Chance of precipitation is 70%.
Rain before 2am, then a chance of rain showers. Cloudy, with a low around 52. Chance of precipitation is 80%.
A chance of rain showers before 8am. Partly sunny, with a high near 61. Chance of precipitation is 30%.
Partly cloudy, with a low around 43.
Sunny, with a high near 56.
Partly cloudy, with a low around 40.
Rain showers likely. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Rain showers likely. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
A chance of rain showers. Mostly cloudy, with a high near 50. Chance of precipitation is 50%.
A slight chance of rain showers before 11pm. Mostly cloudy, with a low around 34.
Lake Sunapee currently reports 43°F with wind velocity near 2 mph from the S. 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 →