Lake Tony
Seminole County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Lake Tony. Here is what has been measured.
- Mesotrophic
- Limited data
Lake Tony in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 6.6 ft visibility. Phosphorus: 20 µg/L.
Lake Tony is a mesotrophic lake in Seminole County, Florida. Overall water quality is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Lake Tony ranks #75 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-05-15. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Lake Tony is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Tony
These are the measurements Florida DEP publishes for Lake Tony, 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 6.6 ft. Phosphorus 20 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 6.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Lake Tony
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Tony typically sits around 74°F at the surface in November. Summer average is about 86°F. Usually warmest in Aug (about 87°F) and coldest in Feb (about 65°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (65°F) to its warmest (87°F).
Typical surface water temperature by month, from 55 field readings (2010–2025) via the EPA Water Quality Portal. See the full Lake Tony water temperature breakdown →
Stays via Stay22
Stays near Lake Tony
Compare lakeside cabins, hotels, and vacation rentals near Lake Tony 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 Tony
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Lake Tony
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening5 years
Phosphorus
Worsening+1.8 µg/L/yr5 years
Nearby Lakes in Seminole County
Frequently asked questions about Lake Tony
Where is Lake Tony?
- Lake Tony is a lake in Seminole County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Lake Tony?
- Lake Tony in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 6.6 ft visibility. Phosphorus: 20 µg/L.
Is Lake Tony safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake Tony?
- Lake Tony typically sits around 74°F at the surface in November, from 55 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Lake Tony across LakeQuality
Planning a trip around Canaveral?
Lake Tony is about 33 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 lakes in Florida
Other Lakes in Florida
Mesotrophic 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)
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.