Archibald Lake
Archibald Lake in Oconto County, Wisconsin has a water quality grade of B (Good). Water clarity: 17.8 ft visibility. Phosphorus: 10.7 µg/L. Maximum depth: 50 ft. Surface area: 392 acres.
Wisconsin DNR lists Walleye as common on Archibald Lake. DNR survey details →
- Clarity
- 17.8 ft
- Typical in August
- 77°F
- Max depth
- 50 ft
- Area
- 392 acres
- Type
- Oligotrophic
- Trend
- → Stable
- Public access
- Yes
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Archibald Lake is a 392-acre cold, clear oligotrophic lake in Oconto County, Wisconsin with a maximum depth of 50 feet. Water quality is graded B based on 1 sampling years through 2026. Water clarity is improving over recent sampling years. The lake supports 4 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available. Compared to the 38 other monitored lakes in Oconto County, Archibald Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-06-29. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Crystal clear, you can see 17.8 ft down. Phosphorus level: 10.7 µg/L. Trophic State Index: 37.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.8 ft | Not graded |
| Phosphorus | 10.7 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 37 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Archibald Lake
Compare lakeside cabins, hotels, and vacation rentals near Archibald Lake in Oconto County, Wisconsin — 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.
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Water Temperature
Archibald Lake typically sits around 77°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 77°F) and coldest in May (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 22 field readings (2024–2026) via the EPA Water Quality Portal. See the full Archibald Lake water temperature breakdown →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Archibald Lake — clouds, ice, or an off-season gap in coverage. The most recent reading was low (7,870 cells/mL) on May 16, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Wisconsin DNR lists Walleye as common on Archibald Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Archibald Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1986. 20 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 392 acres |
| Public Access | Yes |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Archibald 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: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1.795 m/yr | 7 |
| Phosphorus | ↓ Declining | +2.75 µg/L/yr | 6 |
County Ranking
Ranked #11 of 39 lakes in Oconto County
Nearby Lakes in Oconto County
Frequently asked questions about Archibald Lake
Where is Archibald Lake?
- Archibald Lake is a lake in Oconto County, Wisconsin. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Archibald Lake?
- Archibald Lake in Oconto County, Wisconsin has a water quality grade of B (Good). Water clarity: 17.8 ft visibility. Phosphorus: 10.7 µg/L. Maximum depth: 50 ft. Surface area: 392 acres.
Is Archibald Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Archibald Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Archibald Lake?
- Archibald Lake typically sits around 77°F at the surface in August, from 22 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Archibald Lake?
- Archibald Lake has a maximum depth of 50 feet. The lake covers 392 acres.
What fish are in Archibald Lake?
- Fish species found in Archibald Lake include Musky, Panfish, Largemouth Bass, Walleye. Archibald Lake is located in Oconto County, Wisconsin.
What did the DNR fisheries survey find at Archibald Lake?
- Wisconsin DNR lists Walleye as common on Archibald Lake. A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality grades Archibald Lake B from EPA Water Quality Portal chemistry, and the water-quality trend over 7 years of monitoring is stable. Catch rate is not a swim clearance and is not a weekly bite report.
Does Archibald Lake have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Archibald Lake (clouds, ice, or an off-season gap). The most recent reading was low (7,870 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
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Where this data comes from
90 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX90 samples · 2020–2026
Analytical methods
- Phosphorus by Colorimetry
Monitoring station identifiers (2)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes