Lake Manitoba
Lake Manitoba in Lee County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 70 µg/L.
- Clarity
- 2.3 ft
- Typical in August
- 87°F
- Type
- Eutrophic
- Trend
- ↑ Improving
- Public access
- Yes
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Lake Manitoba →
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Lake Manitoba is a productive, nutrient-rich eutrophic lake in Lee County, Florida. Water quality is graded D based on 1 sampling years through 2025. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 5 public boat landings. Compared to the 73 other monitored lakes in Lee County, Lake Manitoba ranks #13 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-05-08. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria D
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.
Based on E. coli testing, Lake Manitoba frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 12.9% of 31 samples across 3 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Water Quality Grade: D (Nutrient-rich)
Very murky, less than 2.3 ft of visibility. Phosphorus level: 70 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 70 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Manitoba
Compare lakeside cabins, hotels, and vacation rentals near Lake Manitoba in Lee County, Florida — 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 grade measures nutrients and algae, not lodging — cabins and rentals around Lake Manitoba are listed below.
Top-rated places to stay near Lake Manitoba
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 Florida’s top lakes →
Water Temperature
Lake Manitoba typically sits around 87°F at the surface in August. Summer average is about 86°F. Usually warmest in Aug (about 87°F) and coldest in Jan (about 67°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 488 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Manitoba water temperature breakdown →
Recreation & Access
- Horton Park Public Boat RampPublic
- Rosen Park Public Boat RampPublic
- City of Cape Coral - 1609 NE 12th Street (Primitive)Public
- City of Cape Coral - 2111 NE 5th Terrace (Primitive)Public
- City of Cape Coral - 520 SE 23rd Place (Primitive)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Manitoba
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.017 m/yr | 5 |
| Phosphorus | ↑ Improving | -4 µg/L/yr | 5 |
Regulated Pollution Sources Nearby
5 EPA-permitted facilities operate within about 5 miles of Lake Manitoba under Clean Water Act (NPDES) discharge permits, including 5 classified by the EPA as major dischargers. 1 facility has a reported Clean Water Act violation in the past three years.
- Everest Parkway WrfCape Coral · 2.9 mi away · NPDES FL0030007MajorRecent violation
- Cape Coral, City OfCape Coral · 1.4 mi away · NPDES FLS266949Major
- Waterway Estates AwwtpNorth Fort Myers · 1.7 mi away · NPDES FL0030325Major
- Lee Co & Co App - MS4Fort Myers · 3.6 mi away · NPDES FLS000035Major
- Fort Myers, City OfFort Myers · 3.6 mi away · NPDES FLS266884Major
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.
County Ranking
Ranked #13 of 74 lakes in Lee County
Nearby Lakes With Higher Grades
Lake Manitoba holds Grade D. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
See full comparison →Nearby Lakes in Lee County
Frequently asked questions about Lake Manitoba
Where is Lake Manitoba?
- Lake Manitoba is a lake in Lee County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Manitoba?
- Lake Manitoba in Lee County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.3 ft visibility. Phosphorus: 70 µg/L.
Is Lake Manitoba safe to swim in?
- Based on E. coli testing, Lake Manitoba frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 12.9% of 31 samples across 3 seasons. That works out to a bacteria swim-safety grade of D — a historical summary of past testing, not a current reading. Lake Manitoba has a water quality grade of D (Nutrient-rich). Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Lake Manitoba?
- Lake Manitoba typically sits around 87°F at the surface in August, from 488 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on Lake Manitoba?
- Lake Manitoba has 5 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Horton Park Public Boat Ramp, Rosen Park Public Boat Ramp, City of Cape Coral - 1609 NE 12th Street (Primitive), City of Cape Coral - 2111 NE 5th Terrace (Primitive), among others. Public access is listed as yes.
Explore Lake Manitoba across LakeQuality
9 mi away · cable-pulled, no boat wake
Species activity outlook by water temperature and season
Where to stay at Florida's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
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Where this data comes from
240 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples240 samples · 2020–2025
Monitoring station identifiers (1)
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory