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Official National Weather Service (NWS) point forecast and real-time wind conditions for Island Park Reservoir (Idaho). 24-hour hour-by-hour wind timelines, peak gusts, watercraft recreation safety thresholds, and 7-day marine outlook.
Today: High 72°F · Low 35°F
Peak gusts: 5 mph · Lake surface chop expected
Humidity: 39% · Barometer: 29.85 inHg
USGS water monitoring available for Island Park Reservoir.
Excellent for boating (99/100), from 4 available inputs. Supporting this: Wind 1 mph from the northeast. 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.
Good for fishing (81/100), from 5 available inputs. Supporting this: Wind 1 mph from the northeast. 0% chance of precipitation. Working against it: Air temperature 41°F. 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 (96/100), from 5 available inputs. Supporting this: Wind 1 mph from the northeast. Gusts to 6 mph. Working against it: Air temperature 41°F. 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 41°F. Not available from a verified source for this lake: water temperature.
| Time | Air Temp | Wind (mph) | Direction | Peak Gusts | Rain Chance | Sky & Conditions |
|---|---|---|---|---|---|---|
| 1 AM | 41°F | 1 mph | NE | ⚡ 6 mph | 0% | Partly Cloudy |
| 2 AM | 39°F | 1 mph | E | ⚡ 5 mph | 0% | Mostly Clear |
| 3 AM | 38°F | 1 mph | E | ⚡ 5 mph | 0% | Mostly Clear |
| 4 AM | 37°F | 1 mph | E | ⚡ 5 mph | 0% | Mostly Clear |
| 5 AM | 36°F | 1 mph | E | ⚡ 5 mph | 0% | Mostly Clear |
| 6 AM | 35°F | 1 mph | E | ⚡ 5 mph | 0% | Sunny |
| 7 AM | 35°F | 1 mph | E | ⚡ 5 mph | 0% | Mostly Sunny |
| 8 AM | 35°F | 1 mph | SE | ⚡ 5 mph | 0% | Sunny |
| 9 AM | 41°F | 2 mph | SE | ⚡ 6 mph | 0% | Sunny |
| 10 AM | 53°F | 3 mph | S | ⚡ 8 mph | 0% | Sunny |
| 11 AM | 60°F | 6 mph | S | ⚡ 14 mph | 0% | Sunny |
| 12 PM | 65°F | 8 mph | S | ⚡ 18 mph | 0% | Sunny |
| 1 PM | 68°F | 10 mph | SW | ⚡ 22 mph | 0% | Sunny |
| 2 PM | 70°F | 12 mph | SW | ⚡ 24 mph | 0% | Sunny |
| 3 PM | 72°F | 13 mph | SW | ⚡ 25 mph | 0% | Sunny |
| 4 PM | 70°F | 13 mph | SW | ⚡ 27 mph | 0% | Sunny |
| 5 PM | 70°F | 13 mph | SW | ⚡ 27 mph | 1% | Sunny |
| 6 PM | 68°F | 10 mph | SW | ⚡ 24 mph | 1% | Clear |
| 7 PM | 62°F | 9 mph | SW | ⚡ 24 mph | 1% | Mostly Clear |
| 8 PM | 57°F | 10 mph | SW | ⚡ 24 mph | 1% | Mostly Clear |
| 9 PM | 53°F | 10 mph | SW | ⚡ 23 mph | 1% | Mostly Clear |
| 10 PM | 50°F | 8 mph | S | ⚡ 21 mph | 1% | Partly Cloudy |
| 11 PM | 48°F | 5 mph | S | ⚡ 14 mph | 2% | Partly Cloudy |
| 12 AM | 46°F | 3 mph | SW | ⚡ 10 mph | 2% | Partly 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.
Sunny. High near 73, with temperatures falling to around 71 in the afternoon. Southeast wind 2 to 7 mph.
Sunny. High near 73, with temperatures falling to around 71 in the afternoon. South southwest wind around 7 mph.
Partly cloudy. Low around 35, with temperatures rising to around 37 overnight. East southeast wind 1 to 5 mph.
Partly cloudy. Low around 35, with temperatures rising to around 37 overnight. East northeast wind around 2 mph.
Mostly clear, with a low around 35. East northeast wind around 2 mph.
Sunny. High near 72, with temperatures falling to around 70 in the afternoon. South wind 1 to 13 mph, with gusts as high as 26 mph.
Isolated rain showers after 3am. Partly cloudy. Low around 39, with temperatures rising to around 41 overnight. South southwest wind 1 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Rain showers likely before 3pm, then showers and thunderstorms. Cloudy, with a high near 59. South southwest wind 3 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
Showers and thunderstorms. Cloudy, with a low around 36. East southeast wind around 6 mph. Chance of precipitation is 100%.
Showers and thunderstorms. Cloudy, with a high near 50. Chance of precipitation is 100%.
Rain showers. Cloudy, with a low around 32. Chance of precipitation is 100%.
Rain showers before noon, then showers and thunderstorms. Cloudy, with a high near 51. Chance of precipitation is 90%.
Rain likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
A chance of rain. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.
Island Park Reservoir currently reports 45°F with wind velocity near 5 mph from the N. 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 Island Park 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 PIH) high-resolution numerical point-forecast API. LakeRadar uses the official gridpoint for Island Park 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 Island Park Reservoir Water Level & Temperature page.
View Island Park Reservoir Water Level & Temperature →