Weaver Lake
Hennepin County, Minnesota152 acresView mapDirections
Minnesota PCA publishes the water-quality measurements for Weaver Lake. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- Eurasian watermilfoil
- 57 ft max depth
- Public access
Weaver Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 38.7 µg/L. Chlorophyll-a (algae): 10.6 µg/L. Maximum depth: 57 ft. Surface area: 152.09 acres.
Minnesota DNR's Standard Survey on July 11, 2023 caught 0.67 walleye per gill net at Weaver Lake. DNR survey details →
Weaver Lake is a 152-acre productive, nutrient-rich eutrophic lake in Hennepin County, Minnesota with a maximum depth of 57 feet (21-foot average). Overall water quality is declining over recent sampling years. The lake supports 15 documented fish species including black bullhead, black crappie, and bluegill. Public access is available with 1 public boat landing. Compared to the 80 other monitored lakes in Hennepin County, Weaver Lake ranks #44 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2024-10-07. Methodology: how these readings are compared.
Weaver Lake covers about 150 acres in Hennepin County. It has one public boat landing. The median ice-out date is March 28, which is when the open-water season begins. For a place on the water, look through cabin and lake-house rentals near Weaver Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Weaver Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Fishing15 species recorded
- Ice seasonIce-out around Mar 28
- Deep water57 ft surveyed max depth
Swimming conditions
Readings onlyElevated nutrients
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Weaver Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Weaver Lake is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Weaver Lake
These are the measurements Minnesota PCA publishes for Weaver Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 5 ft. Phosphorus 38.7 µg/L. Chlorophyll-a 10.6 µg/L. TSI 55.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 38.7µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 10.6µg/L | Fair GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 55 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Weaver Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Weaver Lake typically sits around 50°F at the surface in October. Summer average is about 54°F. Usually warmest in Aug (about 55°F) and coldest in Jan (about 35°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (35°F) to its warmest (55°F).
Typical surface water temperature by month, from 2,033 field readings (2010–2024) via the EPA Water Quality Portal. See the full Weaver Lake water temperature breakdown →
Minnesota DNR's Standard Survey on July 11, 2023 caught 0.67 walleye per gill net at Weaver Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Weaver Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
DNR Fisheries Survey Summary
9 surveys on file from MN DNR Fisheries. Most recent: 2023-07-11 (Standard Survey).
9 surveys on file · most recent 2023-07-11 (Standard Survey)
| Species | Catch rate (CPUE) | Size | Avg weight |
|---|---|---|---|
| Bluegill | 80.32 | 3–7 in 2023-07-11 | 0.15 lb |
| Yellow Bullhead | 9.37 | 7–14 in 2023-07-11 | 0.91 lb |
| Largemouth Bass | 9.06 | 7–16 in 2023-07-11 | 1.09 lb |
CPUE = catch per unit effort, fish caught per net per set in a standardised survey. It measures abundance, not size, and is not a weekly bite report.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Bluegill
Yellow Bullhead
Largemouth Bass
From the 2023-07-11 survey
Weaver Lake is a 152-acre lake with an average depth of 20.7 feet and a maximum depth of 57 feet. The lake is in the city of Maple Grove in north-central Hennepin County. Weaver is actively managed for Bluegill, with secondary emphasis on Northern Pike and Largemouth Bass. Weaver also supports catchable populations of…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Weaver Lake. 3 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — WeaverFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — WeaverFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — WeaverPublic Water Access Sites · MN DNR LakeFinder
Lake Details
Max depth
57 ft
Average depth
20.7 ft
Surface area
152 acres
Shoreline
2.5 mi
Littoral zone
50%
Share shallower than 15 ft
Public access
Yes
Listed by Minnesota PCA
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Elevation
906 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Weaver Lake ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Weaver Lake
Compare lakeside cabins, hotels, and vacation rentals near Weaver Lake in Hennepin County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Weaver Lake are listed below.
Top-rated places to stay near Weaver Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
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Fish Species
Click a species to see every lake where it is documented.
Fishing Weaver Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Worsening
Based on 6 years of monitoring (2020–2025).
Water clarity
Worsening6 years
Phosphorus
Worsening+2.74 µg/L/yr4 years
Chlorophyll-a
Worsening+0.47 µg/L/yr4 years
Ice season
Typical ice-out
Mar 28
Earliest Mar 15, 2016 · Latest Apr 14, 2022
Most recent ice-out
Apr 14
2022
6 observations · Minnesota PCA ice records
EPA Impairment Status
Weaver Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN27-0117-00 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Weaver Lake under Clean Water Act (NPDES) discharge permits.
- Maple Hill Estates WwtfCorcoran · 1.7 mi away · NPDES MN0031127
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Hennepin County
Frequently asked questions about Weaver Lake
Where is Weaver Lake?
- Weaver Lake is a lake in Hennepin County, Minnesota. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Weaver Lake?
- Weaver Lake in Hennepin County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 5 ft visibility. Phosphorus: 38.7 µg/L. Chlorophyll-a (algae): 10.6 µg/L. Maximum depth: 57 ft. Surface area: 152.09 acres.
Is Weaver Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Weaver Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
What is the water temperature of Weaver Lake?
- Weaver Lake typically sits around 50°F at the surface in October, from 2,033 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
How deep is Weaver Lake?
- Weaver Lake has a maximum depth of 57 feet and an average depth of 20.7 feet. The lake covers 152.09 acres.
What fish are in Weaver Lake?
- Fish species found in Weaver Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, tiger muskellunge, walleye, white sucker, yellow bullhead, yellow perch. Weaver Lake is located in Hennepin County, Minnesota.
What did the DNR fisheries survey find at Weaver Lake?
- Minnesota DNR's Standard Survey on July 11, 2023 caught 0.67 walleye per gill net at Weaver Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Weaver Lake’s water-quality measurements separately, and the water-quality trend over 6 years of monitoring is declining. Catch rate is not a swim clearance and is not a weekly bite report.
When does Weaver Lake thaw?
- Weaver Lake typically has ice-out around Mar 28.
Are there boat ramps on Weaver Lake?
- Weaver Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Weaver Lake Park. Public access is listed as yes.
Can I fish at Weaver Lake?
- Weaver Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Minnesota's fish and wildlife agency, so check its current regulations before you go.
Explore Weaver Lake across LakeQuality
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Fish species and best lakes in Hennepin County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
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Minnesota's cleanest lakes, ranked on agency measurements
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Where this data comes from
325 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA325 samples · 2020–2024
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 4500 N C ~ Persufate Method for Total Nitrogen
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory
Ice data from Minnesota DNR Climate