Okaloosa-Roberts Lake
Okaloosa-Roberts Lake in Okaloosa County, Florida has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 7.5 µg/L. Surface area: 22 acres.
- Clarity
- 4.5 ft
- Typical in August
- 80°F
- Area
- 22 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
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Okaloosa-Roberts Lake is a 22-acre mesotrophic lake in Okaloosa County, Florida. Water quality is graded B based on 1 sampling years through 2022. Overall water quality is improving over recent sampling years. Compared to the 14 other monitored lakes in Okaloosa County, Okaloosa-Roberts Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-05-08. 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 4.5 ft. Phosphorus level: 7.5 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 7.5 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Okaloosa-Roberts Lake
Compare lakeside cabins, hotels, and vacation rentals near Okaloosa-Roberts Lake in Okaloosa 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.
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Planning a whole trip? See where to stay at Florida’s top lakes →
Water Temperature
Okaloosa-Roberts Lake typically sits around 80°F at the surface in August. Summer average is about 79°F. Usually warmest in Aug (about 80°F) and coldest in Jan (about 56°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 282 field readings (2011–2025) via the EPA Water Quality Portal. See the full Okaloosa-Roberts Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 22 acres |
No bathymetric survey has been published for Okaloosa-Roberts Lake, so its depth is not documented here.
Fishing Okaloosa-Roberts Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.05 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.4 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Okaloosa-Roberts Lake is a man-made reservoir impounded by the James Robert Lake Dam (completed 1966), built primarily for recreation on the Swift Creek; earth-type dam, 14 ft tall and 490 ft long.
- Surface area
- 22 ac
- Normal storage
- 107 ac-ft
- Max storage
- 149 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- Florida Freshwater Fish and Wildlife Conservation Commission
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID FL00014 · Operator website · Matched by proximity (0.45 km)
EPA Impairment Status
Okaloosa-Roberts Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Source: EPA ATTAINS assessment unit FL568 · Official waterbody report · Matched by proximity (1.48 km)
County Ranking
Ranked #1 of 15 lakes in Okaloosa County
Nearby Lakes in Okaloosa County
Frequently asked questions about Okaloosa-Roberts Lake
Where is Okaloosa-Roberts Lake?
- Okaloosa-Roberts Lake is a lake in Okaloosa County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Okaloosa-Roberts Lake?
- Okaloosa-Roberts Lake in Okaloosa County, Florida has a water quality grade of B (Good). Water clarity: 4.5 ft visibility. Phosphorus: 7.5 µg/L. Surface area: 22 acres.
Is Okaloosa-Roberts Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Okaloosa-Roberts Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Okaloosa-Roberts Lake?
- Okaloosa-Roberts Lake typically sits around 80°F at the surface in August, from 282 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
Explore Okaloosa-Roberts Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
100 measurements from 3 monitoring stations, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX100 samples · 2020–2022
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