Kelly Lake
Kelly Lake in Orange County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.2 ft visibility. Phosphorus: 61.5 µg/L.
- Clarity
- 2.2 ft
- Typical in July
- 88°F
- Type
- Eutrophic
- Trend
- → Stable
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Kelly Lake →
Next lake in Orange County
Swipe left or right on this bar to open the next or previous lake.
Kelly Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water quality is graded D based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Kelly Lake ranks #300 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-04-09. Grade methodology: LakeQuality methodology.
Watch Kelly Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
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, Kelly Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 13% of 23 samples across 6 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 2.2 ft of visibility. Phosphorus level: 61.5 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.2 ft | Not graded |
| Phosphorus | 61.5 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 Kelly Lake
Compare lakeside cabins, hotels, and vacation rentals near Kelly Lake in Orange 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 Kelly Lake are listed below.
Top-rated places to stay near Kelly Lake
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
Kelly Lake typically sits around 88°F at the surface in July. Summer average is about 86°F. Usually warmest in Jul (about 88°F) and coldest in Jan (about 64°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 91 field readings (2010–2025) via the EPA Water Quality Portal. See the full Kelly Lake water temperature breakdown →
Fishing Kelly Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.03 m/yr | 5 |
| Phosphorus | ↑ Improving | -3.6 µg/L/yr | 4 |
EPA Impairment Status
Kelly Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL3002R · Official waterbody report
County Ranking
Ranked #300 of 320 lakes in Orange County
Nearby Lakes With Higher Grades
Kelly Lake holds Grade D. One nearby lake has a higher nutrient-and-algae grade — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Orange County
Frequently asked questions about Kelly Lake
Where is Kelly Lake?
- Kelly Lake is a lake in Orange County, Florida. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Kelly Lake?
- Kelly Lake in Orange County, Florida has a water quality grade of D (Nutrient-rich). Water clarity: 2.2 ft visibility. Phosphorus: 61.5 µg/L.
Is Kelly Lake safe to swim in?
- Based on E. coli testing, Kelly Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 13% of 23 samples across 6 seasons. That works out to a bacteria swim-safety grade of D — a historical summary of past testing, not a current reading. Kelly Lake 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 Kelly Lake?
- Kelly Lake typically sits around 88°F at the surface in July, from 91 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Kelly Lake across LakeQuality
More Florida Lake Rankings
Other Grade D Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
35 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 samples35 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
Impairment status from EPA ATTAINS 303(d) database