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Lake Hamilton algae history from satellite

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

Clear scenes
415
Typical (median), index
159
Highest reading
624 · Sep 9, 2026
Latest scene
350 · Sep 24, 2026

Algae signal (red-edge index) over time

02004006008002017201820192020202120222023202420252026May 14, 2016: 140 index (low)Jun 23, 2016: 102 index (high)Jul 13, 2016: 113 index (high)Aug 2, 2016: 123 index (high)Aug 22, 2016: 83 index (high)Sep 11, 2016: 86 index (high)Oct 1, 2016: 86 index (high)Oct 21, 2016: 101 index (high)Nov 10, 2016: 120 index (high)Nov 20, 2016: 140 index (high)Nov 30, 2016: 181 index (high)Dec 30, 2016: 114 index (high)Feb 8, 2017: 136 index (high)Mar 10, 2017: 155 index (high)Mar 30, 2017: 170 index (high)May 9, 2017: 228 index (high)May 29, 2017: 297 index (high)Aug 12, 2017: 197 index (high)Aug 17, 2017: 210 index (high)Sep 21, 2017: 158 index (high)Sep 26, 2017: 154 index (high)Oct 16, 2017: 121 index (high)Oct 31, 2017: 105 index (high)Nov 25, 2017: 104 index (high)Nov 30, 2017: 105 index (high)Dec 10, 2017: 85 index (high)Dec 15, 2017: 47 index (low)Dec 20, 2017: 66 index (high)Dec 30, 2017: 78 index (high)Jan 4, 2018: 85 index (high)Jan 24, 2018: 58 index (high)Feb 18, 2018: 58 index (high)Feb 23, 2018: 76 index (high)Feb 28, 2018: 72 index (high)Mar 5, 2018: 76 index (high)Mar 15, 2018: 66 index (high)Mar 25, 2018: 69 index (low)Mar 30, 2018: 81 index (low)Apr 4, 2018: 72 index (high)Apr 9, 2018: 100 index (low)Apr 19, 2018: 119 index (high)Apr 24, 2018: 142 index (low)Apr 29, 2018: 141 index (high)May 4, 2018: 194 index (high)May 9, 2018: 227 index (high)May 24, 2018: 301 index (high)May 29, 2018: 337 index (high)Jun 3, 2018: 305 index (low)Jun 8, 2018: 305 index (high)Jun 13, 2018: 328 index (high)Jun 23, 2018: 341 index (high)Jun 28, 2018: 364 index (high)Jul 3, 2018: 267 index (high)Jul 13, 2018: 271 index (high)Jul 28, 2018: 263 index (high)Aug 2, 2018: 238 index (low)Aug 7, 2018: 209 index (high)Aug 12, 2018: 222 index (high)Aug 17, 2018: 197 index (high)Aug 27, 2018: 175 index (high)Sep 1, 2018: 187 index (high)Sep 6, 2018: 176 index (high)Sep 16, 2018: 152 index (high)Sep 26, 2018: 147 index (high)Oct 6, 2018: 40 index (low)Oct 16, 2018: 124 index (high)Oct 21, 2018: 122 index (high)Oct 31, 2018: 159 index (high)Nov 10, 2018: 155 index (high)Nov 15, 2018: 174 index (high)Nov 25, 2018: 154 index (high)Dec 5, 2018: 166 index (high)Dec 10, 2018: 139 index (high)Dec 25, 2018: 120 index (high)Dec 30, 2018: 93 index (high)Jan 4, 2019: 106 index (high)Jan 14, 2019: 112 index (high)Jan 29, 2019: 111 index (high)Feb 8, 2019: 91 index (high)Feb 23, 2019: 108 index (high)Feb 28, 2019: 110 index (high)Mar 10, 2019: 114 index (high)Mar 15, 2019: 106 index (high)Mar 25, 2019: 106 index (high)Apr 4, 2019: 107 index (low)Apr 24, 2019: 129 index (high)Apr 29, 2019: 124 index (low)May 9, 2019: 197 index (low)May 19, 2019: 193 index (high)May 24, 2019: 215 index (low)May 29, 2019: 230 index (low)Jun 18, 2019: 279 index (high)Jun 23, 2019: 273 index (low)Jun 28, 2019: 251 index (low)Jul 3, 2019: 230 index (high)Jul 8, 2019: 231 index (low)Jul 18, 2019: 227 index (high)Jul 23, 2019: 212 index (high)Jul 28, 2019: 207 index (high)Aug 2, 2019: 127 index (high)Aug 22, 2019: 128 index (high)Aug 27, 2019: 116 index (high)Sep 1, 2019: 127 index (high)Sep 6, 2019: 111 index (high)Sep 11, 2019: 114 index (high)Sep 16, 2019: 116 index (high)Sep 21, 2019: 119 index (high)Sep 26, 2019: 102 index (high)Oct 11, 2019: 109 index (high)Oct 16, 2019: 129 index (high)Oct 21, 2019: 122 index (high)Oct 26, 2019: 134 index (high)Nov 10, 2019: 100 index (high)Nov 20, 2019: 104 index (high)Nov 30, 2019: 113 index (high)Dec 15, 2019: 109 index (high)Dec 25, 2019: 117 index (high)Jan 9, 2020: 113 index (high)Jan 14, 2020: 105 index (high)Feb 3, 2020: 95 index (high)Feb 8, 2020: 103 index (high)Feb 13, 2020: 72 index (low)Feb 23, 2020: 112 index (high)Feb 28, 2020: 104 index (high)Mar 14, 2020: 110 index (high)Mar 19, 2020: 129 index (high)Mar 24, 2020: 143 index (high)Mar 29, 2020: 153 index (high)Apr 3, 2020: 164 index (high)Apr 8, 2020: 166 index (high)May 3, 2020: 184 index (high)May 8, 2020: 177 index (low)May 13, 2020: 210 index (low)May 23, 2020: 246 index (low)May 28, 2020: 172 index (low)Jun 17, 2020: 172 index (high)Jun 22, 2020: 164 index (high)Jun 27, 2020: 166 index (high)Jul 7, 2020: 237 index (high)Jul 12, 2020: 244 index (high)Jul 17, 2020: 246 index (high)Jul 27, 2020: 216 index (high)Aug 1, 2020: 203 index (low)Aug 11, 2020: 177 index (high)Aug 21, 2020: 187 index (high)Sep 10, 2020: 210 index (high)Sep 25, 2020: 155 index (high)Oct 15, 2020: 131 index (high)Oct 25, 2020: 134 index (high)Oct 30, 2020: 110 index (high)Nov 4, 2020: 124 index (high)Nov 14, 2020: 124 index (high)Nov 24, 2020: 119 index (high)Dec 9, 2020: 96 index (high)Dec 19, 2020: 94 index (high)Dec 29, 2020: 86 index (high)Jan 18, 2021: 85 index (high)Jan 28, 2021: 90 index (high)Feb 2, 2021: 91 index (high)Feb 7, 2021: 78 index (low)Feb 22, 2021: 78 index (high)Feb 27, 2021: 87 index (high)Mar 4, 2021: 86 index (high)Mar 9, 2021: 89 index (high)Mar 14, 2021: 89 index (high)Mar 19, 2021: 101 index (high)Mar 24, 2021: 96 index (high)Apr 3, 2021: 126 index (high)Apr 8, 2021: 115 index (high)Apr 13, 2021: 118 index (high)Apr 28, 2021: 148 index (low)May 3, 2021: 145 index (low)May 8, 2021: 141 index (high)May 23, 2021: 129 index (low)May 28, 2021: 160 index (high)Jun 2, 2021: 144 index (low)Jun 12, 2021: 167 index (low)Jul 2, 2021: 214 index (low)Jul 12, 2021: 231 index (low)Jul 17, 2021: 206 index (high)Jul 22, 2021: 181 index (high)Jul 27, 2021: 210 index (high)Aug 1, 2021: 213 index (high)Aug 6, 2021: 215 index (high)Aug 11, 2021: 218 index (high)Aug 21, 2021: 193 index (high)Aug 31, 2021: 220 index (high)Sep 10, 2021: 212 index (high)Sep 15, 2021: 217 index (high)Sep 25, 2021: 211 index (high)Sep 30, 2021: 199 index (high)Oct 10, 2021: 243 index (high)Oct 15, 2021: 235 index (high)Oct 30, 2021: 217 index (high)Nov 9, 2021: 208 index (high)Nov 19, 2021: 220 index (high)Nov 24, 2021: 195 index (high)Nov 29, 2021: 181 index (high)Dec 4, 2021: 176 index (high)Dec 9, 2021: 128 index (low)Dec 14, 2021: 111 index (high)Dec 24, 2021: 187 index (high)Dec 29, 2021: 173 index (high)Jan 3, 2022: 159 index (high)Jan 8, 2022: 168 index (high)Jan 13, 2022: 165 index (high)Jan 18, 2022: 161 index (high)Feb 2, 2022: 143 index (high)Feb 12, 2022: 142 index (high)Feb 22, 2022: 156 index (high)Feb 27, 2022: 150 index (high)Mar 4, 2022: 147 index (high)Mar 19, 2022: 231 index (high)Mar 29, 2022: 219 index (high)Apr 3, 2022: 295 index (low)Apr 8, 2022: 208 index (high)Apr 28, 2022: 313 index (high)May 8, 2022: 325 index (high)May 13, 2022: 365 index (high)May 18, 2022: 390 index (high)May 23, 2022: 417 index (high)Jun 7, 2022: 405 index (high)Jun 17, 2022: 417 index (high)Jul 7, 2022: 399 index (high)Jul 12, 2022: 427 index (high)Jul 22, 2022: 415 index (high)Jul 27, 2022: 402 index (high)Aug 1, 2022: 442 index (high)Aug 6, 2022: 393 index (high)Aug 16, 2022: 380 index (high)Aug 21, 2022: 412 index (high)Aug 26, 2022: 382 index (high)Aug 31, 2022: 338 index (high)Sep 20, 2022: 262 index (high)Sep 30, 2022: 171 index (high)Oct 5, 2022: 148 index (high)Oct 10, 2022: 124 index (high)Oct 25, 2022: 81 index (high)Oct 30, 2022: 86 index (high)Nov 4, 2022: 91 index (high)Nov 14, 2022: 75 index (high)Nov 19, 2022: 83 index (high)Nov 29, 2022: 94 index (high)Dec 4, 2022: 104 index (high)Dec 9, 2022: 98 index (high)Dec 14, 2022: 102 index (high)Dec 19, 2022: 75 index (high)Dec 29, 2022: 61 index (high)Jan 3, 2023: 41 index (low)Jan 8, 2023: 62 index (high)Jan 13, 2023: 63 index (high)Feb 7, 2023: 52 index (high)Feb 17, 2023: 54 index (high)Feb 22, 2023: 51 index (high)Feb 27, 2023: 40 index (low)Mar 9, 2023: 54 index (low)Mar 14, 2023: 48 index (low)Mar 24, 2023: 46 index (low)Mar 29, 2023: 53 index (low)Apr 8, 2023: 97 index (high)Apr 18, 2023: 109 index (high)Apr 23, 2023: 147 index (low)May 3, 2023: 153 index (low)May 8, 2023: 172 index (high)May 13, 2023: 187 index (high)May 18, 2023: 182 index (high)May 23, 2023: 193 index (high)May 28, 2023: 162 index (high)Jun 2, 2023: 237 index (low)Jun 7, 2023: 195 index (low)Jun 27, 2023: 151 index (low)Jul 2, 2023: 120 index (high)Jul 12, 2023: 157 index (high)Jul 22, 2023: 149 index (low)Aug 1, 2023: 146 index (high)Aug 6, 2023: 148 index (low)Aug 11, 2023: 134 index (high)Aug 26, 2023: 132 index (high)Sep 10, 2023: 136 index (high)Sep 15, 2023: 119 index (high)Sep 25, 2023: 114 index (high)Oct 5, 2023: 134 index (high)Oct 15, 2023: 122 index (high)Oct 20, 2023: 132 index (high)Oct 25, 2023: 126 index (high)Nov 4, 2023: 138 index (high)Nov 9, 2023: 147 index (high)Nov 19, 2023: 148 index (high)Nov 29, 2023: 135 index (high)Dec 4, 2023: 123 index (high)Dec 19, 2023: 136 index (high)Dec 29, 2023: 112 index (high)Feb 2, 2024: 112 index (high)Feb 7, 2024: 122 index (high)Feb 12, 2024: 127 index (high)Feb 22, 2024: 126 index (high)Feb 27, 2024: 125 index (high)Mar 3, 2024: 160 index (high)Mar 8, 2024: 148 index (high)Mar 13, 2024: 175 index (high)Mar 23, 2024: 173 index (high)Apr 7, 2024: 195 index (high)Apr 12, 2024: 229 index (high)Apr 17, 2024: 241 index (high)May 2, 2024: 327 index (high)May 7, 2024: 341 index (high)May 22, 2024: 416 index (high)May 27, 2024: 354 index (high)Jun 6, 2024: 399 index (high)Jun 16, 2024: 373 index (high)Jun 21, 2024: 365 index (high)Jun 26, 2024: 405 index (high)Jul 6, 2024: 302 index (high)Jul 16, 2024: 443 index (high)Jul 21, 2024: 403 index (high)Jul 26, 2024: 382 index (high)Jul 31, 2024: 433 index (high)Aug 10, 2024: 447 index (high)Aug 15, 2024: 402 index (high)Aug 30, 2024: 426 index (high)Sep 29, 2024: 342 index (high)Oct 4, 2024: 184 index (high)Oct 14, 2024: 230 index (high)Oct 19, 2024: 167 index (high)Oct 24, 2024: 201 index (high)Oct 29, 2024: 194 index (high)Nov 3, 2024: 86 index (high)Nov 13, 2024: 66 index (high)Nov 18, 2024: 75 index (high)Nov 23, 2024: 115 index (high)Dec 3, 2024: 106 index (high)Dec 8, 2024: 116 index (high)Dec 13, 2024: 122 index (high)Dec 23, 2024: 124 index (high)Jan 12, 2025: 115 index (high)Jan 17, 2025: 116 index (high)Jan 27, 2025: 81 index (high)Feb 6, 2025: 80 index (high)Feb 21, 2025: 95 index (high)Feb 26, 2025: 84 index (high)Mar 3, 2025: 85 index (high)Mar 13, 2025: 84 index (high)Mar 18, 2025: 78 index (high)Apr 12, 2025: 113 index (low)Apr 17, 2025: 88 index (low)Apr 27, 2025: 101 index (high)May 2, 2025: 151 index (high)May 9, 2025: 179 index (high)May 17, 2025: 148 index (low)Jun 1, 2025: 174 index (high)Jun 6, 2025: 208 index (low)Jun 11, 2025: 257 index (high)Jun 16, 2025: 238 index (high)Jun 18, 2025: 226 index (high)Jul 1, 2025: 270 index (low)Jul 6, 2025: 260 index (high)Jul 16, 2025: 250 index (high)Jul 21, 2025: 268 index (high)Jul 26, 2025: 236 index (high)Jul 28, 2025: 253 index (high)Aug 15, 2025: 272 index (high)Aug 20, 2025: 305 index (high)Aug 30, 2025: 252 index (high)Sep 14, 2025: 203 index (high)Sep 19, 2025: 207 index (high)Sep 24, 2025: 195 index (high)Sep 29, 2025: 254 index (high)Oct 14, 2025: 207 index (high)Oct 16, 2025: 235 index (high)Oct 19, 2025: 229 index (high)Oct 24, 2025: 202 index (high)Oct 29, 2025: 234 index (high)Nov 3, 2025: 201 index (high)Nov 8, 2025: 223 index (high)Nov 13, 2025: 197 index (high)Nov 18, 2025: 210 index (high)Nov 23, 2025: 171 index (high)Nov 25, 2025: 117 index (high)Dec 13, 2025: 197 index (high)Dec 28, 2025: 213 index (high)Jan 2, 2026: 188 index (high)Jan 7, 2026: 207 index (high)Jan 17, 2026: 208 index (high)Jan 27, 2026: 186 index (high)Feb 1, 2026: 154 index (high)Feb 6, 2026: 172 index (high)Feb 21, 2026: 149 index (high)Feb 26, 2026: 108 index (high)Mar 8, 2026: 223 index (high)Mar 28, 2026: 241 index (high)Apr 12, 2026: 309 index (high)Apr 17, 2026: 321 index (high)Apr 22, 2026: 184 index (high)Apr 24, 2026: 366 index (high)Apr 27, 2026: 421 index (high)May 7, 2026: 373 index (high)May 22, 2026: 468 index (high)Jun 6, 2026: 444 index (high)Jun 21, 2026: 513 index (high)Jun 23, 2026: 490 index (high)Jun 26, 2026: 503 index (high)Jul 1, 2026: 539 index (high)Jul 6, 2026: 486 index (high)Jul 11, 2026: 482 index (high)Jul 13, 2026: 596 index (high)Jul 16, 2026: 570 index (high)Jul 21, 2026: 513 index (high)Jul 26, 2026: 551 index (high)Aug 15, 2026: 517 index (high)Sep 4, 2026: 369 index (high)Sep 9, 2026: 624 index (high)Sep 11, 2026: 565 index (high)Sep 14, 2026: 570 index (high)Sep 19, 2026: 569 index (high)Sep 24, 2026: 350 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
Jan2311296%
Feb3610492%
Mar3410682%
Apr3114271%
May3919769%
Jun3227672%
Jul4326088%
Aug3721392%
Sep35187100%
Oct3613397%
Nov36130100%
Dec3311294%

By year (median / highest): 2016: 113 / 181 (12 scenes) · 2017: 136 / 297 (17 scenes) · 2018: 154 / 364 (46 scenes) · 2019: 118 / 279 (42 scenes) · 2020: 153 / 246 (39 scenes) · 2021: 173 / 243 (47 scenes) · 2022: 171 / 442 (45 scenes) · 2023: 133 / 237 (44 scenes) · 2024: 198 / 447 (42 scenes) · 2025: 203 / 305 (46 scenes) · 2026: 421 / 624 (35 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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