Lake Hayes
Lake Hayes in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 5.1 ft visibility. Phosphorus: 20.5 µg/L.
- Clarity
- 5.1 ft
- Typical in August
- 89°F
- Type
- Eutrophic
- Trend
- → Stable
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Lake Hayes is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Water quality is graded B based on 1 sampling years through 2025. Water clarity is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Lake Hayes ranks #54 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-06-10. Grade methodology: LakeQuality 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)
Murky, only visible to about 5.1 ft. Phosphorus level: 20.5 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.1 ft | Not graded |
| Phosphorus | 20.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Hayes
Compare lakeside cabins, hotels, and vacation rentals near Lake Hayes in Seminole 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.
Top-rated places to stay near Lake Hayes
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Lake Hayes typically sits around 89°F at the surface in August. Summer average is about 88°F. Usually warmest in Aug (about 89°F) and coldest in Dec (about 69°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 52 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Hayes water temperature breakdown →
Fishing Lake Hayes
Water Quality Trend: → Stable
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.041 m/yr | 6 |
| Phosphorus | ↑ Improving | -9.13 µg/L/yr | 5 |
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Lake Hayes under Clean Water Act (NPDES) discharge permits, including 2 classified by the EPA as major dischargers. 1 facility has a reported Clean Water Act violation in the past three years.
- Orlando/Iron Bridge Regional WrfOviedo · 0.7 mi away · NPDES FL0037966MajorRecent violation
- Oviedo, City OfOviedo · 1.4 mi away · NPDES FLS266558Major
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 #54 of 122 lakes in Seminole County
Nearby Lakes in Seminole County
Frequently asked questions about Lake Hayes
Where is Lake Hayes?
- Lake Hayes is a lake in Seminole County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Hayes?
- Lake Hayes in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 5.1 ft visibility. Phosphorus: 20.5 µg/L.
Is Lake Hayes safe to swim in?
- Good for swimming, clear water with low algae levels. Lake Hayes has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Lake Hayes?
- Lake Hayes typically sits around 89°F at the surface in August, from 52 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Lake Hayes across LakeQuality
Planning a trip around Canaveral?
Lake Hayes is about 30 miles from Canaveral National Seashore. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Canaveral →More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
39 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 samples39 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)