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Grand Lake is one of the lakes LakeRadar tracks in Colorado. It covers roughly 507 surface acres. The deepest point reaches about 265 feet, and the surface sits near 8,369 feet above sea level. Fish documented in the area include Rainbow Trout, Mackinaw (Lake Trout), Brown Trout, and Kokanee Salmon. Water data on this page comes from a mapped monitoring station near the lake. Other waters in the region include Shadow Mountain Lake, Lake Granby, and Williams Fork Reservoir. Below you will find an hourly and 7-day forecast, wind and gust outlook, water readings, fishing conditions, and activity scores for boating, paddling, and swimming. This page combines the live forecast, wind, and conditions for Grand Lake so you can plan a visit.
Updated
No active alerts for this lake as of the last check (Oct 11, 10:58 AM MDT). Alerts are re-checked automatically; see the official source for updates.
Best good fishing window, averaging 87/100 across these hours. Wind 6 mph from the west-southwest. Measured water temperature 56°F from a representative gauge 0.5 mi away. Provisional data. Derived from the hourly forecast; official alerts are not forecast and are checked separately.
| Metric | 4p | 5p | 6p | 7p | 8p | 9p | 10p | 11p | 12a | 1a | 2a | 3a | 4a | 5a | 6a | 7a | 8a | 9a | 10a | 11a | 12p | 1p | 2p | 3p |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 53° | 57° | 61° | 64° | 65° | 65° | 65° | 64° | 63° | 59° | 53° | 50° | 47° | 46° | 44° | 42° | 41° | 39° | 37° | 36° | 35° | 34° | 35° | 42° |
| Wind (kts) | 3 | 4 | 6 | 7 | 8 | 7 | 6 | 6 | 4 | 3 | 4 | 5 | 5 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 8 |
| Direction | SW | SW | SW | SW | SW | SW | SW | SW | S | E | SE | S | SW | W | W | W | W | W | W | W | SW | SW | W | W |
| Gusts (kts) | 5 | 6 | 15 | 18 | 19 | 19 | 16 | 14 | 9 | 9 | 10 | 11 | 12 | 11 | 13 | 15 | 18 | 17 | 14 | 12 | 12 | 13 | 13 | 16 |
| Precip % | 6% | 6% | 15% | 15% | 15% | 20% | 20% | 20% | 27% | 27% | 27% | 21% | 21% | 21% | 16% | 16% | 16% | 21% | 21% | 21% | 0% | 0% | 0% | 0% |
| Time | Temp | Wind | Gusts | Precip | Cloud | Condition |
|---|---|---|---|---|---|---|
| Sun, 10 AM MDT | 53°F | 3 mph SSW (203°) | 6 mph | 6% | 74% | Mostly Cloudy |
| Sun, 11 AM MDT | 57°F | 5 mph SSW (203°) | 7 mph | 6% | 68% | Partly Sunny |
| Sun, 12 PM MDT | 61°F | 7 mph SSW (203°) | 17 mph | 15% | 70% | Slight Chance Rain Showers |
| Sun, 1 PM MDT | 64°F | 8 mph SW (225°) | 21 mph | 15% | 68% | Slight Chance Rain Showers |
| Sun, 2 PM MDT | 65°F | 9 mph SW (225°) | 22 mph | 15% | 70% | Slight Chance Rain Showers |
| Sun, 3 PM MDT | 65°F | 8 mph SW (225°) | 22 mph | 20% | 65% | Slight Chance Rain Showers |
| Sun, 4 PM MDT | 65°F | 7 mph SSW (203°) | 18 mph | 20% | 67% | Slight Chance Rain Showers |
| Sun, 5 PM MDT | 64°F | 7 mph SSW (203°) | 16 mph | 20% | 59% | Slight Chance Rain Showers |
| Sun, 6 PM MDT | 63°F | 5 mph S (180°) | 10 mph | 27% | 63% | Chance Rain Showers |
| Sun, 7 PM MDT | 59°F | 3 mph ENE (68°) | 10 mph | 27% | 67% | Chance Rain Showers |
| Sun, 8 PM MDT | 53°F | 5 mph SE (135°) | 12 mph | 27% | 62% | Chance Rain Showers |
| Sun, 9 PM MDT | 50°F | 6 mph SSE (158°) | 13 mph | 21% | 60% | Slight Chance Rain Showers |
| Sun, 10 PM MDT | 47°F | 6 mph SSW (203°) | 14 mph | 21% | 48% | Slight Chance Rain Showers |
| Sun, 11 PM MDT | 46°F | 6 mph WSW (248°) | 13 mph | 21% | 44% | Slight Chance Rain Showers |
| Mon, 12 AM MDT | 44°F | 7 mph WSW (248°) | 15 mph | 16% | 39% | Slight Chance Rain Showers |
| Mon, 1 AM MDT | 42°F | 8 mph WSW (248°) | 17 mph | 16% | 28% | Slight Chance Rain Showers |
| Mon, 2 AM MDT | 41°F | 9 mph WSW (248°) | 21 mph | 16% | 28% | Slight Chance Rain Showers |
| Mon, 3 AM MDT | 39°F | 9 mph WSW (248°) | 20 mph | 21% | 40% | Slight Chance Rain Showers |
| Mon, 4 AM MDT | 37°F | 9 mph WSW (248°) | 16 mph | 21% | 40% | Slight Chance Rain Showers |
| Mon, 5 AM MDT | 36°F | 9 mph WSW (248°) | 14 mph | 21% | 40% | Slight Chance Rain Showers |
| Mon, 6 AM MDT | 35°F | 9 mph SW (225°) | 14 mph | 0% | 37% | Mostly Sunny |
| Mon, 7 AM MDT | 34°F | 9 mph SW (225°) | 15 mph | 0% | 36% | Mostly Sunny |
| Mon, 8 AM MDT | 35°F | 8 mph WSW (248°) | 15 mph | 0% | 34% | Mostly Sunny |
| Mon, 9 AM MDT | 42°F | 9 mph WSW (248°) | 18 mph | 0% | 28% | Mostly Sunny |
| Mon, 10 AM MDT | 49°F | 9 mph WSW (248°) | 20 mph | 0% | 33% | Mostly Sunny |
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 | Today October 11, 2026 | Tonight 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 | Saturday Night October 17, 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp (°F) | 66° | 34° | 60° | 33° | 59° | 27° | 50° | 23° | 50° | 20° | 53° | 22° | 58° | 24° |
| Wind | SSW 2 to 9 mph | SSW 3 to 9 mph | SW 8 to 14 mph | SSE 1 to 6 mph | SSW 1 to 9 mph | SE 7 mph | SE 5 to 10 mph | W 7 to 10 mph | WNW 3 to 7 mph | N 2 to 8 mph | SSE 1 to 5 mph | W 3 mph | WSW 2 to 7 mph | WSW 7 mph |
| Gusts | 22 mph | 21 mph | 28 mph | 15 mph | 22 mph | 13 mph | 22 mph | 20 mph | 16 mph | 15 mph | 14 mph | 8 mph | 17 mph | 9 mph |
| Precip % | 20% | 27% | 0% | 26% | 41% | 67% | 78% | 73% | 41% | 32% | 12% | 9% | 4% | 9% |
| Forecast |
No active USGS or USACE telemetry gauge is currently mapped to Grand Lake. Not available from a verified source for this lake.
GRAND LAKE OUTLET BLW CHIPMUNK LN AT GRAND LK, CO · Oct 11, 4:50 PM UTC
Good for fishing (84/100), from 6 available inputs. Supporting this: Wind 3 mph from the south-southwest. Measured water temperature 56°F from a representative gauge 0.5 mi away. Provisional data. Not available from a verified source for this lake: pressure trend. Confidence is moderate (82%) because some inputs are unavailable or older than ideal.
Excellent for boating (98/100), from 4 available inputs. Supporting this: Wind 3 mph from the south-southwest. 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.
Fair for sailing (74/100), from 4 available inputs. Supporting this: Gusts are within 3 mph of sustained wind, so the breeze is steady. No active official alerts for this lake. Not available from a verified source for this lake: visibility. Confidence is high (88%).
Good for kayaking (81/100), from 5 available inputs. Supporting this: Wind 3 mph from the south-southwest. Gusts to 6 mph. Combined air and water temperature is 109°F (below the 120°F safety guideline). Thermal protection recommended for paddle craft. Confidence is high (90%).
Surface water measured at 56°F. Cold shock reflex presents an immediate drowning risk.
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Individual boat ramp GPS coordinates are maintained under the jurisdiction of CO Parks & Wildlife Authority. Public boaters should verify seasonal launch water levels, gate hours, and daily vehicle/vessel fees before traveling.
In CO, Grand Lake stands as a valued freshwater lake offering scenic outdoor recreation and critical regional water resources. Visitors enjoy powerboating, sailing, and tranquil shoreline fishing across its varied channels. Check state agency updates for current fishing creel limits and aquatic species inspections.
Valid freshwater sport fishing license issued by Colorado Parks and Wildlife (CPW) is required for anglers age 16+. Digital license on mobile is accepted.
Mandatory Clean, Drain & Dry inspection. Out-of-area craft require on-site Aquatic Invasive Species (AIS Quagga/Zebra) inspection or decontamination before launch. USCG life jackets required for all.
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 Rainbow Trout, Mackinaw (Lake Trout), Brown Trout, Kokanee Salmon. 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.
High-altitude mountain winter climate (elevation 8,369 ft MSL). Freezing temperatures, potential snowpack or ice cover, and reduced seasonal amenities. Winter safety caution advised.
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 Grand 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 11, 10:58 AM MDT