Guernsey Reservoir Conditions: Weather, Water & Fishing

Guernsey Reservoir Conditions: Weather, Water & Fishing | LakeRadar

24-Hour Hourly Weather & Wind Timeline

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Hour-by-hour forecast for Guernsey Reservoir, next 24 hours
Metric	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a	4a	5a	6a	7a	8a	9a	10a	11a	12p
Temp (°F)	48°	51°	58°	66°	75°	81°	84°	86°	87°	86°	85°	80°	74°	70°	67°	65°	63°	62°	61°	59°	59°	57°	57°	56°
Wind (kts)	4	4	9	9	13	13	13	13	13	13	9	9	9	9	9	9	9	9	9	9	4	4	4	9
Direction	S	S	SW	SW	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W	W
Gusts (kts)	7	10	13	16	18	20	20	20	19	17	16	15	14	13	13	12	12	12	11	10	10	10	10	11
Precip %	0%	0%	0%	0%	0%	0%	0%	0%	3%	3%	3%	16%	16%	16%	6%	6%	6%	1%	1%	1%	1%	1%	1%	6%

ForecastView official hourly forecast

Hour-by-hour forecast for Guernsey Reservoir, next 24 hours
Time	Temp	Wind	Gusts	Precip	Cloud	Condition
Fri, 7 AM MDT	48°F	5 mph S (180°)	8 mph	0%	9%	Sunny
Fri, 8 AM MDT	51°F	5 mph S (180°)	12 mph	0%	6%	Sunny
Fri, 9 AM MDT	58°F	10 mph SSW (203°)	15 mph	0%	4%	Sunny
Fri, 10 AM MDT	66°F	10 mph SW (225°)	18 mph	0%	2%	Sunny
Fri, 11 AM MDT	75°F	15 mph WSW (248°)	21 mph	0%	2%	Sunny
Fri, 12 PM MDT	81°F	15 mph WSW (248°)	23 mph	0%	3%	Sunny
Fri, 1 PM MDT	84°F	15 mph WSW (248°)	23 mph	0%	3%	Sunny
Fri, 2 PM MDT	86°F	15 mph WSW (248°)	23 mph	0%	2%	Sunny
Fri, 3 PM MDT	87°F	15 mph W (270°)	22 mph	3%	5%	Sunny
Fri, 4 PM MDT	86°F	15 mph W (270°)	20 mph	3%	12%	Sunny
Fri, 5 PM MDT	85°F	10 mph W (270°)	18 mph	3%	14%	Sunny
Fri, 6 PM MDT	80°F	10 mph W (270°)	17 mph	16%	16%	Slight Chance Rain Showers
Fri, 7 PM MDT	74°F	10 mph W (270°)	16 mph	16%	19%	Slight Chance Rain Showers
Fri, 8 PM MDT	70°F	10 mph W (270°)	15 mph	16%	31%	Slight Chance Rain Showers
Fri, 9 PM MDT	67°F	10 mph WSW (248°)	15 mph	6%	43%	Partly Cloudy
Fri, 10 PM MDT	65°F	10 mph WSW (248°)	14 mph	6%	40%	Partly Cloudy
Fri, 11 PM MDT	63°F	10 mph WSW (248°)	14 mph	6%	24%	Mostly Clear
Sat, 12 AM MDT	62°F	10 mph WSW (248°)	14 mph	1%	25%	Mostly Clear
Sat, 1 AM MDT	61°F	10 mph WSW (248°)	13 mph	1%	25%	Mostly Clear
Sat, 2 AM MDT	59°F	10 mph WSW (248°)	12 mph	1%	26%	Partly Cloudy
Sat, 3 AM MDT	59°F	5 mph WSW (248°)	12 mph	1%	18%	Mostly Clear
Sat, 4 AM MDT	57°F	5 mph WSW (248°)	12 mph	1%	13%	Mostly Clear
Sat, 5 AM MDT	57°F	5 mph WSW (248°)	12 mph	1%	10%	Mostly Clear
Sat, 6 AM MDT	56°F	10 mph WSW (248°)	13 mph	6%	6%	Sunny
Sat, 7 AM MDT	55°F	10 mph WSW (248°)	15 mph	6%	13%	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.

7-Day Weather & Wind Forecast

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Seven-day forecast periods for Guernsey Reservoir from the official forecast source
Period	Overnight October 9, 2026	Friday October 9, 2026	Today October 9, 2026	Tonight 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
Temp (°F)	48°	87°	87°	55°	84°	55°	75°	48°	71°	45°	67°	44°	62°	42°
Wind	0 mph	SW 5 to 15 mph	SW 5 to 15 mph	WSW 5 to 10 mph	SW 10 to 20 mph	W 5 to 10 mph	ESE 5 to 10 mph	ESE 5 to 15 mph	SW 5 to 15 mph	E 5 to 10 mph	SE 5 to 10 mph	E 10 to 15 mph	WNW 10 to 15 mph	WNW 15 to 25 mph
Gusts	5 mph	23 mph	23 mph	17 mph	30 mph	13 mph	17 mph	20 mph	25 mph	24 mph	25 mph	25 mph	30 mph	38 mph
Precip %	0%	3%	3%	16%	13%	16%	12%	27%	9%	48%	33%	68%	57%	44%
Forecast	Clear	Sunny	Sunny	Slight Chance Rain Showers then Mostly Clear	Mostly Sunny	Slight Chance Rain Showers	Partly Sunny	Chance Rain Showers	Mostly Sunny	Chance Rain Showers	Chance Rain Showers	Rain Showers Likely	Rain Showers Likely	Chance Rain Showers

Forecast periods from official National Weather Service grid. Detailed 7-Day & Hourly Forecast →

Fishing Conditions & Outlook

Solunar windows, water thermocline & species tactics

Score 93 · Excellent

Excellent for fishing (93/100), from 5 available inputs. Supporting this: Wind 5 mph from the south. Dawn hours (07:00 local). 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.

Prime Solunar Window

5:00 PM MDT – 11:00 PM MDT

Water Layer Temp

Sensor Pending

Surface Chop

4 mph

Barometer Trend

29.76 inHg

Verified Game Fish Species (3):

🐟Common Carp🐟Bluegill🐟Green Sunfish

View Full Fishing Forecast & Solunar Times →Fishing methodology →

Boating & Sailing Outlook

Surface chop, sustained knots, gusts & launch facilities

Boating 76Sailing 66

Motorized Boating

Launch Access

Good for boating (76/100), from 4 available inputs. Supporting this: Wind 5 mph from the south. Gusts to 8 mph. Working against it: Active severe alert: Red Flag Warning. 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.

Surface state: Glass / Light Ripple

Boating Outlook & Ramps Directory →

Sailing & Wind Trim

3 kts (4 mph)

Fair for sailing (66/100), from 4 available inputs. Supporting this: Gusts are within 3 mph of sustained wind, so the breeze is steady. 0% chance of precipitation. Working against it: Active severe alert: Red Flag Warning. Not available from a verified source for this lake: visibility. Confidence is high (88%).

Kayaking, Paddling & Swimming

Paddle drag, thermal comfort & cold water immersion safety

Paddling 77Swimming --

Paddlecraft Readiness

Glassy Surface

Good for kayaking (77/100), from 5 available inputs. Supporting this: Wind 5 mph from the south. Gusts to 8 mph. Working against it: Active severe alert: Red Flag Warning. Confidence is high (90%).

Immersion: Wear USCG Approved Life Jacket

Paddlecraft Guidelines & Launch Points →

Swimming & Immersion

Not monitored

Water temperature is not available from a verified source for this lake. No swimming score is shown without it.

Water Temperature & 30-Day History →

Lake Guide & Verified Facts

Visitor Essentials, Seasonal Guide & Hydrographic Profile

Located in WY, Guernsey Reservoir is a prominent freshwater reservoir known for its freshwater recreation and accessible shoreline. From open-water cruising and watersports to morning kayak tours, the lake attracts visitors throughout the warmer months. Managing stewardship is overseen by state and local natural resource agencies, ensuring sustainable multi-use access.

Surface Area

2,400 acres (4 sq mi)

Max Depth

Not documented

Surface Elevation

Not documented

Managing Authority

State & Local Authorities

Classification

Reservoir

State Jurisdiction

Visitor Essentials · Know Before You Go

Fishing Licensing (WGFD)

Valid freshwater sport fishing license issued by Wyoming Game and Fish Department (WGFD) is required for anglers age 14+. Digital license on mobile is accepted.

Boating & AIS Biosecurity Protocol

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 Recreation & Access Pass

Public shoreline and boating access managed by State & Local Authorities. Verify seasonal gate hours, launch fees, and parking rules before travel.

Primary Water Recreation Profile

High-speed motorboating, pontoon cruising, wakeboarding, and water skiing across main channels. Target gamefish include Common Carp, Bluegill, Green Sunfish. Morning hours typically provide optimal glassy conditions for kayak and stand-up paddleboard (SUP) touring.

Seasonal Recreation & Climate Windows

Summer Peak (Jun–Aug)Peak Season

Warm water temperatures, peak swimming, active watersports, and open full-service campgrounds. Highest weekly attendance; plan early arrivals on summer weekends.

Spring & Fall ShoulderPrime Angling

Spring pre-spawn and fall feeding transitions create prime trophy angling conditions. Cooler air, lower boat traffic, and vibrant seasonal shoreline foliage.

Winter Season (Nov–Mar)Off-Season

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.

Get Directions (GPS) ↗Managing Authority Portal ↗

All geographical facts sourced from official agency recordsView sources →

Guernsey Reservoir Conditions

Red Flag Warning

Quick Conditions

LakeRadar Score

24-Hour Hourly Weather & Wind Timeline

7-Day Weather & Wind Forecast

Water Level (USGS)

Water Temperature (Surface)

Fishing Conditions & Outlook

Boating & Sailing Outlook

Kayaking, Paddling & Swimming

Interactive Map & Navigation Radar

Coordinates and access points

Public Access & Facilities

Boating & Water Regulations

Lake Guide & Verified Facts

Official alerts

Red Flag Warning

Quick Conditions

LakeRadar Score

24-Hour Hourly Weather & Wind Timeline

7-Day Weather & Wind Forecast

Water Level (USGS)

Water Temperature (Surface)

Fishing Conditions & Outlook

Boating & Sailing Outlook

Kayaking, Paddling & Swimming

Interactive Map & Navigation Radar

Coordinates and access points

Public Access & Facilities

Boating & Water Regulations

Lake Guide & Verified Facts

Related Lakes

Sources and methodology