Seminole-Silver Lake
Seminole-Silver Lake in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 13 ft visibility. Phosphorus: 12 µg/L.
- Clarity
- 13 ft
- Typical in August
- 89°F
- Type
- Mesotrophic
- Trend
- ↓ Declining
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Seminole-Silver Lake is a mesotrophic lake in Seminole County, Florida. Water quality is graded B based on 1 sampling years through 2025. Overall water quality is declining over recent sampling years. Compared to the 121 other monitored lakes in Seminole County, Seminole-Silver Lake ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-18. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyBacteria advisory
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)
Good clarity, visible to about 13 ft. Phosphorus level: 12 µg/L. Trophic State Index: 40.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13 ft | Not graded |
| Phosphorus | 12 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Seminole-Silver Lake
Compare lakeside cabins, hotels, and vacation rentals near Seminole-Silver 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 Seminole-Silver Lake
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Seminole-Silver Lake typically sits around 89°F at the surface in August. Summer average is about 89°F. Usually warmest in Jul (about 89°F) and coldest in Jan (about 63°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 24 field readings (2017–2019) via the EPA Water Quality Portal. See the full Seminole-Silver Lake water temperature breakdown →
Fishing Seminole-Silver Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.25 m/yr | 5 |
| Phosphorus | ↓ Declining | +2.3 µg/L/yr | 5 |
EPA Impairment Status
Seminole-Silver 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 FL2982 · Official waterbody report · Matched by proximity (0.65 km)
County Ranking
Ranked #9 of 122 lakes in Seminole County
Nearby Lakes in Seminole County
Frequently asked questions about Seminole-Silver Lake
Where is Seminole-Silver Lake?
- Seminole-Silver Lake 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 Seminole-Silver Lake?
- Seminole-Silver Lake in Seminole County, Florida has a water quality grade of B (Good). Water clarity: 13 ft visibility. Phosphorus: 12 µg/L.
Is Seminole-Silver Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Seminole-Silver Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Seminole-Silver Lake?
- Seminole-Silver Lake typically sits around 89°F at the surface in August, from 24 EPA Water Quality Portal field readings (2017–2019). That is a typical value for the month, not a live reading.
Explore Seminole-Silver Lake across LakeQuality
Planning a trip around Canaveral?
Seminole-Silver Lake 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
Mesotrophic Lakes in Florida
Where this data comes from
303 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX303 samples · 2020–2025
Monitoring station identifiers (3)
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