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Lake Wilhelm is a reservoir in Pennsylvania. The water surface spans about 1,680 acres, making it a mid-sized body of water. The page brings together an hourly and 7-day forecast, wind and gust outlook, and activity scores for boating, paddling, and swimming. If you are planning a trip, Conneaut Lake, Pymatuning Reservoir, and Lake Erie - Pennsylvania Shoreline are also nearby. Use the conditions and forecast on this page to decide when to go boating, fishing, or paddling at Lake Wilhelm.
Updated
No active alerts for this lake as of the last check (Oct 11, 4:05 AM EDT). Alerts are re-checked automatically; see the official source for updates.
Overall Fair (67/100) across 4 activities. Best right now: Sailing (82/100).
How the score is calculated →Best excellent fishing window, averaging 96/100 across these hours. Wind 6 mph from the southwest. Dusk hours (18:00 local). Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 56° | 55° | 55° | 55° | 55° | 56° | 57° | 58° | 59° | 59° | 60° | 60° | 60° | 60° | 60° | 59° | 60° | 59° | 59° | 59° | 58° | 58° | 58° | 58° |
| Wind (kts) | 13 | 13 | 14 | 15 | 14 | 15 | 15 | 14 | 15 | 14 | 12 | 11 | 10 | 9 | 8 | 6 | 4 | 4 | 3 | 2 | 2 | 2 | 2 | 2 |
| Direction | SE | SE | SE | SE | E | E | SE | SE | SE | SE | E | E | E | E | E | E | E | NE | NE | NE | N | N | N | N |
| Gusts (kts) | 21 | 21 | 22 | 23 | 22 | 23 | 24 | 24 | 24 | 24 | 22 | 21 | 20 | 17 | 15 | 12 | 9 | 8 | 6 | 5 | 5 | 4 | 5 | 5 |
| Precip % | 75% | 86% | 83% | 91% | 89% | 85% | 81% | 83% | 77% | 70% | 37% | 52% | 47% | 43% | 37% | 18% | 20% | 19% | 18% | 16% | 11% | 5% | 0% | 0% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Sun, 4 AM EDT | 56°F | 15 mph SE (135°) | 24 mph | 75% | 89% | Rain Showers |
| Sun, 5 AM EDT | 55°F | 15 mph SE (135°) | 24 mph | 86% | 94% | Rain Showers |
| Sun, 6 AM EDT | 55°F | 16 mph SE (135°) | 25 mph | 83% | 92% | Rain Showers |
| Sun, 7 AM EDT | 55°F | 17 mph SE (135°) | 27 mph | 91% | 89% | Rain Showers |
| Sun, 8 AM EDT | 55°F | 16 mph E (90°) | 25 mph | 89% | 97% | Rain Showers |
| Sun, 9 AM EDT | 56°F | 17 mph E (90°) | 27 mph | 85% | 97% | Rain Showers |
| Sun, 10 AM EDT | 57°F | 17 mph SE (135°) | 28 mph | 81% | 93% | Rain Showers |
| Sun, 11 AM EDT | 58°F | 16 mph SE (135°) | 28 mph | 83% | 92% | Rain Showers |
| Sun, 12 PM EDT | 59°F | 17 mph SE (135°) | 28 mph | 77% | 89% | Rain Showers |
| Sun, 1 PM EDT | 59°F | 16 mph SE (135°) | 28 mph | 70% | 86% | Rain Showers Likely |
| Sun, 2 PM EDT | 60°F | 14 mph E (90°) | 25 mph | 37% | 87% | Chance Rain Showers |
| Sun, 3 PM EDT | 60°F | 13 mph E (90°) | 24 mph | 52% | 84% | Chance Rain Showers |
| Sun, 4 PM EDT | 60°F | 12 mph E (90°) | 23 mph | 47% | 91% | Chance Rain Showers |
| Sun, 5 PM EDT | 60°F | 10 mph E (90°) | 20 mph | 43% | 89% | Chance Rain Showers |
| Sun, 6 PM EDT | 60°F | 9 mph E (90°) | 17 mph | 37% | 89% | Chance Rain Showers |
| Sun, 7 PM EDT | 59°F | 7 mph E (90°) | 14 mph | 18% | 81% | Slight Chance Rain Showers |
| Sun, 8 PM EDT | 60°F | 5 mph E (90°) | 10 mph | 20% | 81% | Slight Chance Rain Showers |
| Sun, 9 PM EDT | 59°F | 5 mph NE (45°) | 9 mph | 19% | 73% | Slight Chance Rain Showers |
| Sun, 10 PM EDT | 59°F | 3 mph NE (45°) | 7 mph | 18% | 80% | Slight Chance Rain Showers |
| Sun, 11 PM EDT | 59°F | 2 mph NE (45°) | 6 mph | 16% | 87% | Slight Chance Rain Showers |
| Mon, 12 AM EDT | 58°F | 2 mph N (0°) | 6 mph | 11% | 87% | Mostly Cloudy |
| Mon, 1 AM EDT | 58°F | 2 mph N (0°) | 5 mph | 5% | 78% | Mostly Cloudy |
| Mon, 2 AM EDT | 58°F | 2 mph N (0°) | 6 mph | 0% | 89% | Cloudy |
| Mon, 3 AM EDT | 58°F | 2 mph N (0°) | 6 mph | 0% | 78% | Mostly Cloudy |
| Mon, 4 AM EDT | 57°F | 3 mph N (0°) | 7 mph | 0% | 82% | Mostly Cloudy |
Official National Weather Service hourly forecast. Showing 10 of 25 hours. Wind arrows point the way the wind is blowing; the compass point and degrees show where it comes from.
| Period | Overnight October 11, 2026 | Sunday October 11, 2026 | Sunday Night October 11, 2026 | Columbus Day October 12, 2026 | Monday Night October 12, 2026 | Tuesday October 13, 2026 | Tuesday Night October 13, 2026 | Wednesday October 14, 2026 | Wednesday Night October 14, 2026 | Thursday October 15, 2026 | Thursday Night October 15, 2026 | Friday October 16, 2026 | Friday Night October 16, 2026 | Saturday October 17, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 55° | 60° | 55° | 72° | 58° | 79° | 60° | 69° | 49° | 67° | 49° | 64° | 40° | 52° |
| Wind | SE 15 mph | SE 10 to 17 mph | NE 2 to 9 mph | W 6 mph | SW 6 to 9 mph | SW 9 to 15 mph | W 6 to 13 mph | NW 6 to 10 mph | N 5 to 8 mph | NE 6 to 9 mph | SE 8 to 14 mph | SW 14 to 20 mph | W 13 to 18 mph | NW 14 to 17 mph |
| Gusts | 24 mph | 28 mph | 17 mph | 9 mph | 15 mph | 24 mph | 23 mph | 15 mph | 13 mph | 15 mph | 18 mph | 33 mph | 30 mph | 28 mph |
| Precip % | 86% | 91% | 37% | 0% | 11% | 23% | 29% | 24% | 23% | 18% | 58% | 63% | 63% | 47% |
| Forecast |
Fair for fishing (63/100), from 5 available inputs. Supporting this: Overnight hours (04:00 local). Sky is overcast (89% cloud cover). Working against it: 75% chance of precipitation is likely. 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 boating (65/100), from 4 available inputs. Supporting this: No active official alerts for this lake. Working against it: 75% chance of precipitation is likely. 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 sailing (82/100), from 4 available inputs. Supporting this: Wind 15 mph from the SE is in the preferred sailing range. No active official alerts for this lake. Working against it: 75% chance of precipitation is likely. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Fair for kayaking (65/100), from 5 available inputs. Supporting this: No active official alerts for this lake. Air temperature 56°F. Working against it: 75% chance of precipitation is likely. Confidence is high (90%).
Water temperature is not available from a verified source for this lake. No swimming score is shown without it.
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Individual boat ramp GPS coordinates are maintained under the jurisdiction of PA Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Lake Wilhelm serves PA as a major recreational venue, featuring well-maintained boat ramps, picnic facilities, and scenic waterfront views. Whether casting for bass or cruising the main basin with family, visitors find ample opportunities to enjoy the water. Stewardship and oversight are overseen by state and local natural resource agencies.
Valid freshwater sport fishing license issued by Pennsylvania Fish and Boat Commission (PFBC) is required for anglers age 16+. Digital license on mobile is accepted.
Current motorized watercraft registration mandatory. Practice Clean, Drain & Dry protocols: drain all livewells and inspect props before launching. Life jackets required for all passengers.
Public shoreline and boating access managed by State & Local Authorities. Verify seasonal gate hours, launch fees, and parking rules before travel.
High-speed motorboating, pontoon cruising, wakeboarding, and water skiing across main channels. Target gamefish include Bluegill, Warmouth, Yellow Perch, Green Sunfish. Morning hours typically provide optimal glassy conditions for kayak and stand-up paddleboard (SUP) touring.
Warm water temperatures, peak swimming, active watersports, and open full-service campgrounds. Highest weekly attendance; plan early arrivals on summer weekends.
Spring pre-spawn and fall feeding transitions create prime trophy angling conditions. Cooler air, lower boat traffic, and vibrant seasonal shoreline foliage.
Mild year-round outdoor climate. Uncrowded waters, active winter bass and crappie fishing, and open year-round boat launch access.
No external source rows are cited by the data currently shown on this page.
Updated
Scores are heuristics, not safety guarantees. LakeRadar scores summarize available conditions and are not a substitute for official warnings, local rules, or on-water judgment.
All telemetry for Lake Wilhelm is synchronized directly from authorized federal and state monitoring networks (USGS, NWS, NOAA, and state environmental authorities). Observations are strictly instrumented readings — unmonitored sensors are transparently disclosed rather than synthetic estimates.
Last source audit: Oct 11, 4:10 AM EDT