Secretlk Lake
Seminole County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Secretlk Lake. Here is what has been measured.
- Eutrophic
- Limited data
Secretlk Lake in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.6 ft visibility. Phosphorus: 21 µg/L.
Secretlk Lake is a productive, nutrient-rich eutrophic lake in Seminole County, Florida. Overall water quality is improving over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Secretlk Lake ranks #87 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-11-28. 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 Secretlk Lake 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 Secretlk Lake
These are the measurements Florida DEP publishes for Secretlk Lake, 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 4.6 ft. Phosphorus 21 µg/L. TSI 52.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 21µg/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. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Secretlk Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Secretlk Lake typically sits around 72°F at the surface in November. Summer average is about 87°F. Usually warmest in Aug (about 90°F) and coldest in Feb (about 71°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (71°F) to its warmest (90°F).
Typical surface water temperature by month, from 23 field readings (2019–2023) via the EPA Water Quality Portal. See the full Secretlk Lake water temperature breakdown →
Stays via Stay22
Stays near Secretlk Lake
Compare lakeside cabins, hotels, and vacation rentals near Secretlk Lake 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 Secretlk Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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 →
Follow Secretlk Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Secretlk Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Improving-1.8 µg/L/yr5 years
Nearby Lakes in Seminole County
Frequently asked questions about Secretlk Lake
Where is Secretlk Lake?
- Secretlk Lake 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 Secretlk Lake?
- Secretlk Lake in Seminole County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4.6 ft visibility. Phosphorus: 21 µg/L.
Is Secretlk Lake 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 Secretlk Lake?
- Secretlk Lake typically sits around 72°F at the surface in November, from 23 EPA Water Quality Portal field readings (2019–2023). That is a typical value for the month, not a live reading.
Explore Secretlk Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
14 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples14 samples · 2022–2023
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.