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Official National Weather Service (NWS) point forecast and real-time wind conditions for Guernsey Reservoir (Wyoming). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 84°F · Low 58°F
Peak gusts: 28 mph · Lake surface chop expected
Humidity: 25% · Barometer: 29.76 inHg
USGS water monitoring available for Guernsey Reservoir.
Poor for boating (46/100), from 4 available inputs. Supporting this: No active official alerts for this lake. 27% chance of precipitation. 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 5 available inputs. Supporting this: Sky is cloudy (75% cloud cover). Afternoon hours (16:00 local). The forecast mentions thunderstorms, which carries a risk penalty. 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.
Poor for kayaking (45/100), from 5 available inputs. Supporting this: No active official alerts for this lake. 27% chance of precipitation. The forecast mentions thunderstorms, which carries a risk penalty. 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. Air temperature 84°F. The forecast mentions thunderstorms, which carries a risk penalty. 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 | 84°F | 15 mph | W | ⚡ 24 mph | 27% | Chance Rain Showers |
| 5 PM | 83°F | 15 mph | W | ⚡ 20 mph | 27% | Chance Rain Showers |
| 6 PM | 79°F | 10 mph | SW | ⚡ 16 mph | 15% | Slight Chance Rain Showers |
| 7 PM | 73°F | 10 mph | W | ⚡ 14 mph | 15% | Slight Chance Rain Showers |
| 8 PM | 70°F | 10 mph | W | ⚡ 12 mph | 15% | Slight Chance Rain Showers |
| 9 PM | 68°F | 5 mph | W | ⚡ 12 mph | 22% | Slight Chance Rain Showers |
| 10 PM | 66°F | 5 mph | W | ⚡ 10 mph | 22% | Slight Chance Rain Showers |
| 11 PM | 65°F | 5 mph | W | ⚡ 10 mph | 22% | Slight Chance Rain Showers |
| 12 AM | 63°F | 5 mph | W | ⚡ 10 mph | 15% | Slight Chance Rain Showers |
| 1 AM | 63°F | 5 mph | W | ⚡ 10 mph | 15% | Slight Chance Rain Showers |
| 2 AM | 61°F | 5 mph | W | ⚡ 9 mph | 15% | Slight Chance Rain Showers |
| 3 AM | 61°F | 5 mph | NW | ⚡ 9 mph | 20% | Slight Chance Rain Showers |
| 4 AM | 60°F | 5 mph | NW | ⚡ 8 mph | 20% | Slight Chance Rain Showers |
| 5 AM | 60°F | 5 mph | NW | ⚡ 8 mph | 20% | Slight Chance Rain Showers |
| 6 AM | 59°F | 5 mph | NW | ⚡ 8 mph | 12% | Cloudy |
| 7 AM | 58°F | 5 mph | NW | ⚡ 7 mph | 12% | Cloudy |
| 8 AM | 58°F | 5 mph | W | ⚡ 7 mph | 12% | Mostly Cloudy |
| 9 AM | 60°F | 5 mph | SW | ⚡ 7 mph | 8% | Mostly Cloudy |
| 10 AM | 65°F | 5 mph | SW | ⚡ 8 mph | 8% | Mostly Cloudy |
| 11 AM | 68°F | 5 mph | SW | ⚡ 10 mph | 8% | Mostly Cloudy |
| 12 PM | 71°F | 10 mph | SW | ⚡ 13 mph | 16% | Slight Chance Rain Showers |
| 1 PM | 74°F | 10 mph | S | ⚡ 16 mph | 16% | Slight Chance Rain Showers |
| 2 PM | 76°F | 15 mph | S | ⚡ 18 mph | 16% | Slight Chance Rain Showers |
| 3 PM | 76°F | 15 mph | S | ⚡ 21 mph | 23% | Slight Chance Rain Showers |
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 slight chance of showers and thunderstorms after 3pm. Mostly sunny. High near 84, with temperatures falling to around 81 in the afternoon. West southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
A chance of rain showers after 3pm. Mostly sunny. High near 86, with temperatures falling to around 83 in the afternoon. West southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
A chance of rain showers. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. West southwest wind around 15 mph. Chance of precipitation is 30%.
A slight chance of rain showers. Mostly cloudy. Low around 58, with temperatures rising to around 60 overnight. West wind 5 to 10 mph. Chance of precipitation is 20%.
A slight chance of rain showers after noon. Mostly cloudy. High near 78, with temperatures falling to around 76 in the afternoon. South southwest wind 5 to 15 mph. Chance of precipitation is 20%.
A chance of rain showers before midnight. Mostly cloudy, with a low around 50. East wind 10 to 15 mph. Chance of precipitation is 40%.
Mostly sunny, with a high near 76. South southwest wind 10 to 15 mph.
A chance of rain showers. Partly cloudy, with a low around 44. Chance of precipitation is 50%.
A chance of rain showers. Partly sunny, with a high near 64.
Rain showers likely. Mostly cloudy, with a low around 42.
Rain showers likely. Mostly cloudy, with a high near 56.
Rain showers likely. Mostly cloudy, with a low around 40.
A chance of rain showers. Mostly sunny, with a high near 60.
A chance of rain showers. Partly cloudy, with a low around 37.
Guernsey Reservoir currently reports 78°F with wind velocity near 20 mph from the SW. 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 Guernsey Reservoir 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 CYS) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Guernsey Reservoir 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 Guernsey Reservoir Water Level & Temperature page.
View Guernsey Reservoir Water Level & Temperature →