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Castle Rock Lake sits in Wisconsin and is classified as a lake. The water surface spans about 13,955 acres, making it a large body of water. Fish documented in the area include Smallmouth Bass, Bluegill, Common Carp, and Northern Pike. The deepest point reaches about 35 feet, and the surface sits near 882 feet above sea level. The page brings together an hourly and 7-day forecast, wind and gust outlook, water readings, fishing conditions, and activity scores for boating, paddling, and swimming. Nearby alternatives include Petenwell Lake and Devil's Lake. A nearby water gauge supplies level and temperature readings where available. Use the conditions and forecast on this page to decide when to go boating, fishing, or paddling at Castle Rock Lake.
Updated
No active alerts for this lake as of the last check (Oct 9, 3:03 AM CDT). Alerts are re-checked automatically; see the official source for updates.
Overall Good (86/100) across 4 activities. Best right now: Boating (100/100).
How the score is calculated →Best excellent fishing window, averaging 91/100 across these hours. Wind 9 mph from the southeast. 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) | 47° | 47° | 46° | 45° | 44° | 44° | 49° | 55° | 60° | 65° | 67° | 69° | 70° | 70° | 68° | 67° | 60° | 56° | 56° | 54° | 54° | 54° | 56° | 54° |
| Wind (kts) | 0 | 0 | 0 | 1 | 2 | 3 | 3 | 4 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 7 | 8 | 10 | 10 | 10 | 10 | 9 | 9 |
| Direction | — | — | — | E | E | E | E | E | E | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE | SE |
| Gusts (kts) | 2 | 2 | 2 | 3 | 3 | 5 | 7 | 9 | 11 | 13 | 14 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 17 | 16 | 16 | 15 | 14 | 14 |
| Precip % | 1% | 2% | 2% | 2% | 4% | 4% | 4% | 4% | 2% | 4% | 5% | 8% | 8% | 10% | 7% | 5% | 5% | 5% | 4% | 6% | 8% | 4% | 2% | 1% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Fri, 3 AM CDT | 47°F | Calm | 2 mph | 1% | 28% | Partly Cloudy |
| Fri, 4 AM CDT | 47°F | Calm | 2 mph | 2% | 32% | Partly Cloudy |
| Fri, 5 AM CDT | 46°F | Calm | 2 mph | 2% | 23% | Mostly Clear |
| Fri, 6 AM CDT | 45°F | 1 mph E (90°) | 4 mph | 2% | 24% | Sunny |
| Fri, 7 AM CDT | 44°F | 2 mph E (90°) | 4 mph | 4% | 32% | Mostly Sunny |
| Fri, 8 AM CDT | 44°F | 3 mph E (90°) | 6 mph | 4% | 35% | Mostly Sunny |
| Fri, 9 AM CDT | 49°F | 3 mph E (90°) | 8 mph | 4% | 31% | Mostly Sunny |
| Fri, 10 AM CDT | 55°F | 5 mph E (90°) | 10 mph | 4% | 15% | Sunny |
| Fri, 11 AM CDT | 60°F | 6 mph E (90°) | 13 mph | 2% | 10% | Sunny |
| Fri, 12 PM CDT | 65°F | 7 mph SE (135°) | 15 mph | 4% | 25% | Sunny |
| Fri, 1 PM CDT | 67°F | 8 mph SE (135°) | 16 mph | 5% | 25% | Sunny |
| Fri, 2 PM CDT | 69°F | 9 mph SE (135°) | 17 mph | 8% | 23% | Sunny |
| Fri, 3 PM CDT | 70°F | 9 mph SE (135°) | 17 mph | 8% | 22% | Sunny |
| Fri, 4 PM CDT | 70°F | 9 mph SE (135°) | 18 mph | 10% | 11% | Sunny |
| Fri, 5 PM CDT | 68°F | 9 mph SE (135°) | 18 mph | 7% | 18% | Sunny |
| Fri, 6 PM CDT | 67°F | 9 mph SE (135°) | 18 mph | 5% | 40% | Partly Cloudy |
| Fri, 7 PM CDT | 60°F | 8 mph SE (135°) | 18 mph | 5% | 55% | Mostly Cloudy |
| Fri, 8 PM CDT | 56°F | 9 mph SE (135°) | 18 mph | 5% | 37% | Partly Cloudy |
| Fri, 9 PM CDT | 56°F | 12 mph SE (135°) | 20 mph | 4% | 38% | Partly Cloudy |
| Fri, 10 PM CDT | 54°F | 12 mph SE (135°) | 18 mph | 6% | 40% | Partly Cloudy |
| Fri, 11 PM CDT | 54°F | 12 mph SE (135°) | 18 mph | 8% | 62% | Mostly Cloudy |
| Sat, 12 AM CDT | 54°F | 12 mph SE (135°) | 17 mph | 4% | 44% | Partly Cloudy |
| Sat, 1 AM CDT | 56°F | 10 mph SE (135°) | 16 mph | 2% | 12% | Mostly Clear |
| Sat, 2 AM CDT | 54°F | 10 mph SE (135°) | 16 mph | 1% | 18% | Mostly Clear |
| Sat, 3 AM CDT | 55°F | 10 mph SE (135°) | 16 mph | 2% | 8% | Mostly Clear |
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 9, 2026 | Friday October 9, 2026 | Friday Night October 9, 2026 | Saturday October 10, 2026 | Saturday Night October 10, 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 44° | 70° | 54° | 80° | 57° | 79° | 59° | 77° | 52° | 66° | 44° | 64° | 47° | 66° |
| Wind | 0 mph | SE 1 to 9 mph | SE 8 to 12 mph | S 10 to 14 mph | S 9 to 16 mph | S 8 mph | S 8 mph | SW 8 mph | N 9 mph | N 6 to 9 mph | NE 7 mph | E 7 to 12 mph | SE 13 to 16 mph | S 16 mph |
| Gusts | 2 mph | 18 mph | 20 mph | 24 mph | 27 mph | 15 mph | 15 mph | 17 mph | 17 mph | 16 mph | 13 mph | 23 mph | 24 mph | 28 mph |
| Precip % | 2% | 10% | 8% | 2% | 0% | 0% | 4% | 15% | 34% | 21% | 14% | 33% | 65% | 65% |
| Forecast |
No active USGS or USACE telemetry gauge is currently mapped to Castle Rock Lake. Not available from a verified source for this lake.
Good for fishing (81/100), from 5 available inputs. Supporting this: Wind 0 mph from the south-southeast. 1% chance of precipitation. 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 boating (100/100), from 4 available inputs. Supporting this: Wind 0 mph from the south-southeast. Gusts to 2 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.
Fair for sailing (63/100), from 4 available inputs. Supporting this: Gusts are within 2 mph of sustained wind, so the breeze is steady. No active official alerts for this lake. Working against it: Wind 0 mph is light; expect limited sailing. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Excellent for kayaking (97/100), from 5 available inputs. Supporting this: Wind 0 mph from the south-southeast. Gusts to 2 mph. 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 WI Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
Castle Rock Lake represents an essential recreational destination in WI, offering prime waters for watersports, fishing, and weekend outings. Its shoreline includes accessible boat ramps and public recreation areas overseen by state and local natural resource agencies. Practicing water safety and monitoring sudden wind shifts ensures an enjoyable day on the lake.
Valid freshwater sport fishing license issued by Wisconsin Department of Natural Resources (WDNR) 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 Smallmouth Bass, Bluegill, Common Carp, Northern Pike. 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.
Northern cold winter conditions with freezing air temperatures and potential surface ice formation. Ramps and water systems may be winterized. Confirm open status before visiting.
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 Castle Rock Lake 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 9, 3:03 AM CDT