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Lake Trafford algae history from satellite

We read Lake Trafford from 415 cloud-free satellite scenes between Feb 14, 2016 – Sep 24, 2026. Here is what the surface water showed.

Clear scenes
415
Typical (median), index
143
Highest reading
431 · Jun 2, 2022
Latest scene
188 · Sep 24, 2026

Algae signal (red-edge index) over time

02004006002017201820192020202120222023202420252026Feb 14, 2016: 85 index (high)Apr 14, 2016: 296 index (high)Jun 23, 2016: 76 index (high)Jul 13, 2016: 223 index (high)Aug 2, 2016: 388 index (high)Aug 22, 2016: 100 index (high)Sep 11, 2016: 262 index (high)Oct 1, 2016: 232 index (high)Oct 21, 2016: 206 index (high)Nov 10, 2016: 212 index (high)Nov 20, 2016: 192 index (high)Nov 30, 2016: 159 index (high)Dec 20, 2016: 231 index (high)Dec 30, 2016: 167 index (high)Jan 29, 2017: 77 index (low)Feb 8, 2017: 218 index (high)Mar 10, 2017: 287 index (high)Mar 30, 2017: 340 index (high)May 9, 2017: 281 index (high)May 29, 2017: 358 index (high)Jun 18, 2017: 98 index (low)Jul 3, 2017: 66 index (low)Aug 12, 2017: 262 index (high)Aug 17, 2017: 241 index (high)Sep 21, 2017: 99 index (low)Oct 16, 2017: 123 index (high)Oct 31, 2017: 127 index (high)Nov 20, 2017: 139 index (high)Nov 25, 2017: 155 index (high)Nov 30, 2017: 68 index (low)Dec 10, 2017: 88 index (high)Dec 20, 2017: 72 index (high)Dec 30, 2017: 63 index (high)Jan 4, 2018: 64 index (high)Jan 19, 2018: 74 index (high)Jan 24, 2018: 75 index (high)Feb 8, 2018: 98 index (high)Feb 13, 2018: 99 index (high)Feb 18, 2018: 94 index (high)Feb 28, 2018: 120 index (high)Mar 5, 2018: 79 index (high)Mar 15, 2018: 82 index (high)Mar 20, 2018: 106 index (low)Mar 25, 2018: 119 index (high)Mar 30, 2018: 160 index (high)Apr 4, 2018: 230 index (high)Apr 14, 2018: 229 index (high)Apr 19, 2018: 399 index (high)May 4, 2018: 234 index (low)May 9, 2018: 207 index (low)Jun 3, 2018: 91 index (low)Jun 8, 2018: 211 index (high)Jun 13, 2018: 143 index (low)Jun 18, 2018: 247 index (high)Jul 3, 2018: 232 index (high)Jul 8, 2018: 262 index (low)Jul 18, 2018: 210 index (low)Aug 22, 2018: 141 index (high)Aug 27, 2018: 193 index (high)Sep 1, 2018: 192 index (low)Sep 6, 2018: 188 index (high)Sep 16, 2018: 162 index (high)Sep 21, 2018: 64 index (low)Sep 26, 2018: 195 index (high)Oct 6, 2018: 174 index (high)Oct 16, 2018: 206 index (high)Oct 21, 2018: 222 index (high)Oct 26, 2018: 206 index (high)Oct 31, 2018: 203 index (high)Nov 5, 2018: 212 index (high)Nov 10, 2018: 228 index (high)Nov 20, 2018: 244 index (high)Nov 25, 2018: 181 index (high)Dec 5, 2018: 139 index (high)Dec 10, 2018: 91 index (high)Dec 25, 2018: 129 index (high)Dec 30, 2018: 149 index (high)Jan 4, 2019: 119 index (high)Jan 14, 2019: 100 index (high)Jan 19, 2019: 113 index (high)Jan 29, 2019: 94 index (high)Feb 3, 2019: 89 index (high)Feb 8, 2019: 115 index (high)Feb 18, 2019: 108 index (high)Feb 23, 2019: 109 index (high)Feb 28, 2019: 105 index (high)Mar 10, 2019: 100 index (high)Mar 25, 2019: 91 index (high)Mar 30, 2019: 117 index (high)Apr 24, 2019: 155 index (high)Apr 29, 2019: 191 index (low)May 9, 2019: 99 index (low)May 19, 2019: 195 index (low)May 24, 2019: 191 index (low)May 29, 2019: 227 index (low)Jun 3, 2019: 176 index (high)Jun 8, 2019: 227 index (high)Jun 13, 2019: 242 index (low)Jun 23, 2019: 184 index (high)Jun 28, 2019: 120 index (low)Jul 28, 2019: 136 index (high)Aug 7, 2019: 160 index (high)Aug 17, 2019: 138 index (low)Aug 27, 2019: 99 index (high)Sep 6, 2019: 151 index (high)Sep 11, 2019: 158 index (high)Sep 16, 2019: 177 index (high)Sep 26, 2019: 180 index (high)Oct 1, 2019: 198 index (high)Oct 6, 2019: 198 index (high)Oct 11, 2019: 190 index (high)Oct 16, 2019: 215 index (high)Oct 21, 2019: 216 index (high)Oct 26, 2019: 216 index (high)Nov 5, 2019: 188 index (high)Nov 10, 2019: 144 index (high)Nov 20, 2019: 141 index (high)Nov 30, 2019: 168 index (high)Dec 10, 2019: 177 index (high)Dec 15, 2019: 155 index (high)Dec 25, 2019: 111 index (low)Jan 4, 2020: 130 index (high)Jan 9, 2020: 77 index (high)Jan 19, 2020: 109 index (high)Jan 29, 2020: 87 index (high)Feb 3, 2020: 91 index (high)Feb 8, 2020: 102 index (high)Feb 13, 2020: 127 index (low)Feb 18, 2020: 93 index (high)Feb 23, 2020: 127 index (high)Feb 28, 2020: 112 index (high)Mar 4, 2020: 121 index (high)Mar 14, 2020: 110 index (high)Mar 19, 2020: 103 index (low)Mar 24, 2020: 133 index (high)Mar 29, 2020: 145 index (high)Apr 3, 2020: 136 index (high)Apr 8, 2020: 142 index (high)Apr 13, 2020: 179 index (low)Apr 28, 2020: 198 index (low)May 8, 2020: 134 index (low)May 13, 2020: 210 index (low)May 23, 2020: 132 index (low)Jun 17, 2020: 151 index (low)Jun 27, 2020: 175 index (low)Jul 2, 2020: 210 index (high)Jul 7, 2020: 198 index (high)Jul 27, 2020: 191 index (low)Aug 1, 2020: 231 index (low)Aug 11, 2020: 144 index (high)Aug 26, 2020: 173 index (low)Sep 10, 2020: 118 index (high)Sep 25, 2020: 98 index (high)Oct 10, 2020: 107 index (high)Oct 15, 2020: 139 index (high)Oct 30, 2020: 148 index (high)Nov 14, 2020: 105 index (high)Nov 19, 2020: 109 index (high)Nov 24, 2020: 115 index (high)Nov 29, 2020: 107 index (high)Dec 9, 2020: 113 index (high)Dec 14, 2020: 89 index (high)Dec 19, 2020: 109 index (high)Jan 3, 2021: 130 index (high)Jan 23, 2021: 125 index (high)Jan 28, 2021: 114 index (high)Feb 2, 2021: 116 index (high)Feb 12, 2021: 127 index (high)Feb 17, 2021: 136 index (high)Feb 22, 2021: 136 index (high)Feb 27, 2021: 101 index (high)Mar 9, 2021: 122 index (low)Mar 14, 2021: 105 index (high)Mar 24, 2021: 141 index (high)Mar 29, 2021: 200 index (high)Apr 3, 2021: 114 index (low)Apr 8, 2021: 235 index (high)Apr 13, 2021: 216 index (high)Apr 23, 2021: 206 index (low)Apr 28, 2021: 243 index (high)May 3, 2021: 305 index (low)May 28, 2021: 269 index (high)Jun 2, 2021: 259 index (high)Jun 7, 2021: 122 index (low)Jun 22, 2021: 193 index (low)Jun 27, 2021: 121 index (low)Jul 17, 2021: 129 index (high)Jul 22, 2021: 240 index (high)Aug 1, 2021: 203 index (high)Aug 6, 2021: 133 index (high)Aug 11, 2021: 240 index (low)Aug 16, 2021: 226 index (low)Aug 26, 2021: 165 index (low)Sep 10, 2021: 108 index (high)Sep 15, 2021: 106 index (high)Sep 20, 2021: 84 index (high)Oct 10, 2021: 118 index (high)Oct 15, 2021: 120 index (high)Oct 20, 2021: 136 index (high)Oct 30, 2021: 164 index (high)Nov 9, 2021: 137 index (high)Nov 19, 2021: 112 index (high)Nov 24, 2021: 143 index (high)Nov 29, 2021: 125 index (high)Dec 4, 2021: 85 index (high)Dec 19, 2021: 151 index (high)Dec 24, 2021: 154 index (high)Dec 29, 2021: 117 index (high)Jan 3, 2022: 137 index (high)Jan 8, 2022: 133 index (high)Jan 13, 2022: 147 index (high)Jan 18, 2022: 135 index (high)Feb 2, 2022: 151 index (high)Feb 12, 2022: 132 index (high)Feb 22, 2022: 177 index (high)Feb 27, 2022: 184 index (high)Mar 4, 2022: 104 index (high)Mar 9, 2022: 233 index (high)Mar 19, 2022: 252 index (high)Mar 29, 2022: 234 index (high)Apr 8, 2022: 211 index (low)Apr 13, 2022: 303 index (high)May 13, 2022: 320 index (high)May 18, 2022: 348 index (high)Jun 2, 2022: 431 index (low)Jun 7, 2022: 177 index (low)Jun 17, 2022: 342 index (low)Jul 7, 2022: 235 index (low)Jul 12, 2022: 183 index (high)Aug 1, 2022: 146 index (low)Aug 6, 2022: 194 index (low)Aug 26, 2022: 134 index (high)Aug 31, 2022: 126 index (high)Sep 10, 2022: 111 index (low)Sep 20, 2022: 95 index (high)Sep 30, 2022: 130 index (high)Oct 5, 2022: 85 index (high)Oct 15, 2022: 81 index (high)Oct 25, 2022: 85 index (high)Oct 30, 2022: 99 index (high)Nov 4, 2022: 105 index (high)Nov 14, 2022: 105 index (high)Nov 19, 2022: 113 index (high)Nov 29, 2022: 113 index (high)Dec 4, 2022: 88 index (high)Dec 9, 2022: 138 index (high)Dec 14, 2022: 131 index (high)Dec 19, 2022: 116 index (high)Dec 29, 2022: 116 index (high)Jan 8, 2023: 127 index (high)Jan 18, 2023: 129 index (high)Jan 28, 2023: 154 index (high)Feb 7, 2023: 150 index (high)Feb 17, 2023: 187 index (high)Feb 27, 2023: 254 index (high)Mar 4, 2023: 209 index (high)Mar 9, 2023: 241 index (high)Mar 14, 2023: 199 index (high)Mar 24, 2023: 214 index (high)Mar 29, 2023: 259 index (high)Apr 3, 2023: 311 index (high)Apr 18, 2023: 220 index (high)Apr 23, 2023: 302 index (high)May 3, 2023: 273 index (low)May 8, 2023: 268 index (high)May 18, 2023: 343 index (high)May 28, 2023: 308 index (high)Jun 2, 2023: 358 index (high)Jun 7, 2023: 362 index (low)Jun 22, 2023: 334 index (high)Jul 2, 2023: 304 index (high)Jul 12, 2023: 376 index (high)Jul 22, 2023: 372 index (high)Aug 1, 2023: 346 index (high)Aug 11, 2023: 275 index (high)Aug 21, 2023: 266 index (high)Aug 26, 2023: 256 index (high)Sep 5, 2023: 225 index (high)Sep 10, 2023: 198 index (high)Sep 15, 2023: 209 index (high)Sep 20, 2023: 223 index (high)Sep 30, 2023: 198 index (high)Oct 5, 2023: 181 index (high)Oct 20, 2023: 156 index (high)Oct 30, 2023: 179 index (high)Nov 4, 2023: 137 index (high)Nov 9, 2023: 163 index (high)Nov 19, 2023: 142 index (high)Dec 9, 2023: 134 index (high)Dec 19, 2023: 117 index (high)Feb 2, 2024: 82 index (high)Feb 7, 2024: 91 index (high)Feb 12, 2024: 109 index (high)Feb 22, 2024: 95 index (high)Feb 27, 2024: 90 index (high)Apr 2, 2024: 108 index (low)Apr 7, 2024: 115 index (high)Apr 12, 2024: 125 index (low)Apr 17, 2024: 132 index (low)May 7, 2024: 125 index (high)May 12, 2024: 119 index (high)May 22, 2024: 280 index (low)May 27, 2024: 224 index (low)Jun 6, 2024: 162 index (high)Jul 1, 2024: 199 index (low)Jul 16, 2024: 113 index (high)Aug 10, 2024: 180 index (low)Aug 15, 2024: 163 index (low)Aug 25, 2024: 129 index (high)Aug 30, 2024: 138 index (low)Sep 4, 2024: 144 index (low)Sep 9, 2024: 48 index (low)Sep 29, 2024: 134 index (high)Oct 4, 2024: 130 index (high)Oct 24, 2024: 111 index (high)Oct 29, 2024: 118 index (high)Nov 3, 2024: 121 index (high)Nov 23, 2024: 116 index (high)Nov 28, 2024: 70 index (high)Dec 3, 2024: 117 index (high)Dec 8, 2024: 142 index (high)Dec 13, 2024: 127 index (high)Dec 23, 2024: 132 index (high)Jan 12, 2025: 155 index (high)Jan 27, 2025: 172 index (high)Feb 1, 2025: 191 index (high)Feb 6, 2025: 221 index (high)Feb 16, 2025: 171 index (high)Feb 21, 2025: 135 index (high)Feb 26, 2025: 159 index (high)Mar 3, 2025: 146 index (high)Mar 8, 2025: 131 index (high)Mar 13, 2025: 134 index (high)Mar 18, 2025: 113 index (high)Apr 2, 2025: 163 index (low)Apr 12, 2025: 115 index (low)Apr 17, 2025: 127 index (low)Apr 27, 2025: 149 index (high)May 2, 2025: 182 index (high)May 9, 2025: 213 index (low)May 22, 2025: 260 index (high)May 27, 2025: 223 index (low)May 29, 2025: 319 index (low)Jun 6, 2025: 218 index (high)Jun 16, 2025: 238 index (low)Jul 8, 2025: 237 index (low)Jul 16, 2025: 153 index (low)Jul 21, 2025: 248 index (high)Jul 26, 2025: 237 index (low)Jul 28, 2025: 202 index (high)Jul 31, 2025: 182 index (high)Aug 5, 2025: 208 index (high)Aug 15, 2025: 197 index (high)Aug 17, 2025: 169 index (high)Aug 20, 2025: 195 index (low)Aug 30, 2025: 133 index (high)Sep 14, 2025: 82 index (high)Sep 19, 2025: 88 index (high)Sep 26, 2025: 86 index (high)Sep 29, 2025: 102 index (high)Oct 14, 2025: 76 index (high)Oct 16, 2025: 85 index (high)Oct 24, 2025: 83 index (high)Oct 29, 2025: 97 index (high)Nov 3, 2025: 98 index (high)Nov 5, 2025: 103 index (high)Nov 8, 2025: 102 index (high)Nov 13, 2025: 89 index (high)Nov 18, 2025: 92 index (high)Nov 23, 2025: 87 index (high)Nov 25, 2025: 100 index (high)Nov 28, 2025: 78 index (high)Dec 3, 2025: 95 index (high)Dec 13, 2025: 88 index (high)Dec 28, 2025: 114 index (high)Jan 2, 2026: 123 index (high)Jan 7, 2026: 140 index (high)Jan 12, 2026: 120 index (high)Jan 17, 2026: 113 index (high)Jan 22, 2026: 124 index (high)Jan 27, 2026: 87 index (high)Feb 1, 2026: 86 index (high)Feb 6, 2026: 101 index (high)Feb 11, 2026: 120 index (high)Feb 16, 2026: 130 index (high)Feb 21, 2026: 123 index (high)Feb 26, 2026: 129 index (high)Mar 8, 2026: 130 index (high)Mar 13, 2026: 128 index (high)Mar 28, 2026: 101 index (high)Apr 12, 2026: 97 index (low)Apr 17, 2026: 114 index (high)Apr 24, 2026: 168 index (low)Apr 27, 2026: 161 index (low)May 2, 2026: 153 index (low)May 7, 2026: 170 index (low)May 22, 2026: 209 index (low)Jun 6, 2026: 65 index (low)Jun 11, 2026: 104 index (low)Jun 21, 2026: 177 index (high)Jun 23, 2026: 201 index (high)Jun 26, 2026: 221 index (high)Jul 1, 2026: 226 index (high)Jul 13, 2026: 216 index (high)Jul 21, 2026: 236 index (low)Jul 26, 2026: 264 index (high)Jul 31, 2026: 244 index (low)Aug 2, 2026: 260 index (low)Aug 15, 2026: 237 index (high)Aug 22, 2026: 256 index (high)Sep 4, 2026: 232 index (high)Sep 9, 2026: 227 index (high)Sep 11, 2026: 222 index (high)Sep 14, 2026: 218 index (high)Sep 24, 2026: 188 index (high)
Algae signal (red-edge index), index. One dot per cloud-free scene; dates are local to the lake.

When it peaks

MonthClear scenesMedian, indexScenes rated high
Jan3012197%
Feb4512098%
Mar3513191%
Apr3217353%
May3122439%
Jun3118445%
Jul2922362%
Aug3719365%
Sep3615483%
Oct36143100%
Nov4011898%
Dec3311797%

By year (median / highest): 2016: 209 / 388 (14 scenes) · 2017: 127 / 358 (19 scenes) · 2018: 177 / 399 (44 scenes) · 2019: 155 / 242 (44 scenes) · 2020: 127 / 231 (42 scenes) · 2021: 136 / 305 (45 scenes) · 2022: 135 / 431 (41 scenes) · 2023: 223 / 376 (41 scenes) · 2024: 125 / 280 (33 scenes) · 2025: 140 / 319 (52 scenes) · 2026: 157 / 264 (40 scenes).

What a satellite can and can’t tell you

Satellites see only the surface layer, only on cloud-free days, and only away from the shoreline. They estimate algae; they do not measure toxins, and they can’t see what the lake bottom is doing. A clear reading is not a safety clearance.

For current conditions and health advisories, check the Florida DEP algal bloom page and the Florida Department of Health. If a person or pet may have been exposed to a bloom, call a doctor, a veterinarian, or Poison Help at 1-800-222-1222.

Source: Sentinel-2 MSI (ESA Copernicus), Red-edge cyanobacteria index (CI-cyano); a scene counts as a bloom when the index is above 50 and stays high relative to turbidity (bloom rule v1 (2026-10)). Snapshot exported Oct 9, 2026.

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