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Lake Panasoffkee algae history from satellite

We read Lake Panasoffkee from 381 cloud-free satellite scenes between Apr 14, 2016 – Oct 1, 2026. Here is what the surface water showed.

Clear scenes
381
Typical (median), index
45
Highest reading
261 · May 7, 2026
Latest scene
129 · Oct 1, 2026

Algae signal (red-edge index) over time

01002003002017201820192020202120222023202420252026Apr 14, 2016: 76 index (low)May 14, 2016: -306 index (low)Jun 23, 2016: 79 index (high)Jul 13, 2016: 94 index (high)Aug 2, 2016: -148 index (low)Aug 22, 2016: 94 index (high)Sep 11, 2016: 113 index (high)Oct 1, 2016: 73 index (high)Oct 21, 2016: 79 index (high)Nov 10, 2016: 67 index (high)Nov 20, 2016: 55 index (high)Feb 8, 2017: 8.3 index (low)Mar 30, 2017: 88 index (high)Apr 19, 2017: 81 index (high)May 29, 2017: -185.5 index (low)Jun 18, 2017: 123 index (high)Jul 3, 2017: 127 index (low)Jul 28, 2017: 148 index (high)Aug 12, 2017: -205.1 index (low)Aug 17, 2017: 61 index (high)Sep 21, 2017: 37 index (low)Oct 31, 2017: 7.3 index (low)Nov 20, 2017: -90.4 index (low)Nov 30, 2017: -70.7 index (low)Dec 10, 2017: 22 index (low)Dec 15, 2017: 75 index (low)Dec 20, 2017: -46.5 index (low)Dec 30, 2017: 12 index (low)Jan 4, 2018: 17 index (low)Jan 24, 2018: 27 index (low)Feb 18, 2018: 6.9 index (low)Feb 23, 2018: 26 index (low)Feb 28, 2018: -127 index (low)Mar 5, 2018: 24 index (low)Mar 15, 2018: 28 index (low)Mar 25, 2018: 142 index (high)Apr 4, 2018: 52 index (low)Apr 14, 2018: 85 index (low)Apr 19, 2018: 86 index (high)Apr 24, 2018: 59 index (low)Apr 29, 2018: 59 index (high)May 9, 2018: 50 index (low)May 24, 2018: 41 index (low)Jun 13, 2018: 62 index (high)Jun 18, 2018: 107 index (high)Jun 23, 2018: 98 index (high)Jul 3, 2018: 103 index (high)Jul 13, 2018: 45 index (low)Aug 2, 2018: 37 index (low)Aug 7, 2018: 47 index (low)Aug 17, 2018: 47 index (low)Aug 22, 2018: 72 index (low)Aug 27, 2018: 34 index (low)Sep 1, 2018: 15 index (low)Sep 6, 2018: -143.7 index (low)Sep 11, 2018: 30 index (low)Sep 21, 2018: 23 index (low)Sep 26, 2018: 37 index (low)Oct 1, 2018: 27 index (low)Oct 6, 2018: 22 index (low)Oct 11, 2018: -113.2 index (low)Oct 16, 2018: 33 index (low)Oct 21, 2018: 25 index (low)Oct 31, 2018: 25 index (low)Dec 5, 2018: 13 index (low)Jan 4, 2019: 25 index (low)Jan 29, 2019: 6.8 index (low)Feb 8, 2019: 21 index (low)Feb 18, 2019: 30 index (low)Feb 23, 2019: -16.2 index (low)Feb 28, 2019: -72.7 index (low)Mar 25, 2019: 18 index (low)Mar 30, 2019: 30 index (low)Apr 4, 2019: -296.2 index (low)Apr 24, 2019: 29 index (low)Apr 29, 2019: 46 index (low)May 9, 2019: -211.7 index (low)May 14, 2019: -285.2 index (low)May 19, 2019: 39 index (low)May 24, 2019: 53 index (high)May 29, 2019: 73 index (high)Jun 3, 2019: -322.2 index (low)Jun 23, 2019: 47 index (low)Jun 28, 2019: 43 index (low)Jul 3, 2019: 41 index (low)Jul 23, 2019: 30 index (low)Jul 28, 2019: 30 index (low)Aug 22, 2019: 19 index (low)Aug 27, 2019: 29 index (low)Sep 6, 2019: 3.3 index (low)Sep 11, 2019: 26 index (low)Sep 16, 2019: 21 index (low)Sep 21, 2019: -101.1 index (low)Oct 1, 2019: 22 index (low)Oct 11, 2019: 7.1 index (low)Oct 16, 2019: 55 index (low)Oct 26, 2019: 132 index (low)Nov 10, 2019: 25 index (low)Nov 20, 2019: 12 index (low)Nov 25, 2019: 13 index (low)Nov 30, 2019: 17 index (low)Dec 5, 2019: 18 index (low)Dec 10, 2019: 22 index (low)Dec 20, 2019: 20 index (low)Jan 9, 2020: 9 index (low)Feb 3, 2020: 13 index (low)Feb 8, 2020: 15 index (low)Feb 18, 2020: 26 index (low)Feb 23, 2020: 6.1 index (low)Feb 28, 2020: 15 index (low)Mar 4, 2020: -91.4 index (low)Mar 9, 2020: 24 index (low)Mar 14, 2020: 25 index (low)Mar 19, 2020: 23 index (low)Mar 24, 2020: 193 index (low)Mar 29, 2020: 1.8 index (low)Apr 3, 2020: 44 index (low)Apr 8, 2020: -110 index (low)Apr 23, 2020: 61 index (low)Apr 28, 2020: 36 index (low)May 3, 2020: 32 index (low)May 8, 2020: 43 index (low)May 13, 2020: 19 index (low)Jun 2, 2020: 86 index (low)Jun 22, 2020: 78 index (high)Jul 12, 2020: 68 index (low)Jul 17, 2020: 57 index (low)Jul 27, 2020: 89 index (high)Aug 1, 2020: -178.5 index (low)Aug 11, 2020: 75 index (low)Aug 16, 2020: 75 index (low)Aug 26, 2020: 82 index (high)Sep 5, 2020: 47 index (low)Sep 10, 2020: 244 index (low)Sep 25, 2020: 42 index (low)Oct 15, 2020: 25 index (low)Oct 25, 2020: 24 index (low)Oct 30, 2020: 21 index (low)Nov 4, 2020: -67 index (low)Nov 14, 2020: 17 index (low)Nov 24, 2020: -75.2 index (low)Nov 29, 2020: 32 index (low)Dec 9, 2020: 21 index (low)Dec 19, 2020: 20 index (low)Dec 29, 2020: 40 index (low)Jan 18, 2021: 20 index (low)Jan 28, 2021: 20 index (low)Feb 2, 2021: 24 index (low)Feb 22, 2021: -51.7 index (low)Feb 27, 2021: 23 index (low)Mar 4, 2021: 18 index (low)Mar 9, 2021: 18 index (low)Mar 14, 2021: 23 index (low)Mar 19, 2021: 24 index (low)Mar 24, 2021: 19 index (low)Apr 3, 2021: 28 index (low)Apr 8, 2021: 34 index (low)Apr 13, 2021: 13 index (low)Apr 23, 2021: 31 index (low)Apr 28, 2021: -161.7 index (low)May 3, 2021: 40 index (low)May 8, 2021: 57 index (high)May 28, 2021: 58 index (high)Jun 12, 2021: 79 index (high)Jun 27, 2021: 75 index (low)Jul 2, 2021: 58 index (low)Jul 12, 2021: 55 index (high)Jul 27, 2021: 85 index (high)Aug 6, 2021: 43 index (low)Aug 11, 2021: 48 index (low)Aug 21, 2021: 50 index (high)Sep 15, 2021: 97 index (high)Sep 25, 2021: 62 index (low)Sep 30, 2021: 45 index (low)Oct 10, 2021: 72 index (high)Nov 9, 2021: 45 index (low)Nov 14, 2021: 40 index (low)Nov 24, 2021: 46 index (low)Nov 29, 2021: 33 index (low)Dec 24, 2021: 25 index (low)Dec 29, 2021: 43 index (low)Jan 3, 2022: 32 index (low)Jan 8, 2022: 33 index (low)Jan 18, 2022: 30 index (low)Feb 12, 2022: 45 index (low)Feb 22, 2022: 53 index (high)Feb 27, 2022: -74.2 index (low)Mar 4, 2022: 46 index (low)Mar 14, 2022: 49 index (low)Mar 19, 2022: 49 index (low)Mar 29, 2022: 59 index (high)Apr 3, 2022: 54 index (high)Apr 8, 2022: 38 index (low)May 8, 2022: 88 index (low)May 13, 2022: 86 index (high)May 18, 2022: 115 index (high)May 28, 2022: 57 index (low)Jun 2, 2022: 78 index (low)Jun 7, 2022: 90 index (high)Jun 12, 2022: 170 index (high)Jun 17, 2022: 78 index (high)Jul 7, 2022: -179.9 index (low)Jul 12, 2022: 136 index (high)Jul 27, 2022: 107 index (high)Aug 1, 2022: 85 index (high)Aug 16, 2022: 104 index (high)Aug 21, 2022: 94 index (high)Aug 26, 2022: 94 index (high)Sep 5, 2022: 74 index (high)Sep 15, 2022: -84.7 index (low)Sep 20, 2022: 13 index (low)Sep 30, 2022: 60 index (high)Oct 5, 2022: 55 index (high)Oct 10, 2022: 36 index (low)Oct 15, 2022: 46 index (low)Oct 20, 2022: 33 index (low)Oct 25, 2022: 44 index (low)Nov 14, 2022: -61.7 index (low)Nov 19, 2022: -48.7 index (low)Nov 29, 2022: 43 index (low)Dec 4, 2022: -38.5 index (low)Dec 9, 2022: 43 index (low)Dec 14, 2022: 42 index (low)Dec 19, 2022: 35 index (low)Dec 24, 2022: 35 index (low)Dec 29, 2022: 22 index (low)Jan 3, 2023: 30 index (low)Jan 8, 2023: 35 index (low)Jan 28, 2023: 44 index (low)Feb 7, 2023: -3.3 index (low)Feb 17, 2023: 56 index (high)Feb 22, 2023: 47 index (low)Mar 4, 2023: -70.2 index (low)Mar 9, 2023: 66 index (high)Mar 14, 2023: 56 index (high)Mar 24, 2023: 52 index (high)Mar 29, 2023: 64 index (high)Apr 13, 2023: 89 index (high)Apr 18, 2023: 85 index (high)Apr 23, 2023: 104 index (high)May 3, 2023: 90 index (low)May 8, 2023: 98 index (high)May 18, 2023: 149 index (high)May 28, 2023: 126 index (high)Jun 2, 2023: 174 index (high)Jun 7, 2023: 128 index (high)Jun 12, 2023: -169.9 index (low)Jun 27, 2023: 101 index (low)Jul 2, 2023: 114 index (high)Jul 22, 2023: 160 index (high)Aug 1, 2023: 124 index (high)Aug 11, 2023: 139 index (high)Aug 21, 2023: 143 index (high)Aug 26, 2023: 154 index (high)Aug 31, 2023: 160 index (high)Sep 10, 2023: 103 index (high)Sep 15, 2023: 99 index (high)Sep 25, 2023: 137 index (high)Oct 5, 2023: -11.7 index (low)Oct 10, 2023: -68.2 index (low)Oct 15, 2023: 86 index (high)Oct 20, 2023: 77 index (high)Oct 30, 2023: 53 index (high)Nov 9, 2023: 66 index (high)Nov 19, 2023: 54 index (high)Nov 29, 2023: 45 index (low)Dec 9, 2023: 51 index (high)Dec 19, 2023: 42 index (low)Jan 28, 2024: 37 index (low)Feb 2, 2024: 41 index (low)Feb 7, 2024: 39 index (low)Feb 27, 2024: 31 index (low)Mar 23, 2024: 29 index (low)Mar 28, 2024: -352.5 index (low)Apr 7, 2024: 29 index (low)Apr 22, 2024: -335.9 index (low)Apr 27, 2024: 149 index (low)May 2, 2024: 69 index (high)May 7, 2024: 116 index (high)May 22, 2024: 149 index (high)May 27, 2024: 174 index (high)Jun 1, 2024: 216 index (high)Jun 6, 2024: 168 index (high)Jun 16, 2024: -219.9 index (low)Jul 6, 2024: 99 index (high)Jul 26, 2024: 71 index (high)Aug 15, 2024: 59 index (high)Aug 25, 2024: 38 index (low)Aug 30, 2024: -187.5 index (low)Sep 24, 2024: 43 index (low)Oct 4, 2024: 55 index (high)Oct 14, 2024: 25 index (low)Oct 24, 2024: 28 index (low)Oct 29, 2024: 24 index (low)Nov 3, 2024: 30 index (low)Nov 13, 2024: 25 index (low)Nov 23, 2024: 4.3 index (low)Dec 3, 2024: 17 index (low)Dec 13, 2024: 33 index (low)Dec 28, 2024: 41 index (low)Jan 12, 2025: 36 index (low)Jan 17, 2025: 37 index (low)Feb 6, 2025: 35 index (low)Feb 21, 2025: 40 index (low)Feb 26, 2025: 35 index (low)Mar 3, 2025: 40 index (low)Mar 8, 2025: 51 index (low)Mar 13, 2025: -144.7 index (low)Mar 18, 2025: 33 index (low)Apr 2, 2025: -197.2 index (low)Apr 7, 2025: 64 index (low)Apr 12, 2025: 57 index (high)Apr 17, 2025: 43 index (low)Apr 27, 2025: 62 index (low)May 2, 2025: 88 index (high)May 7, 2025: 103 index (low)May 9, 2025: 97 index (high)May 22, 2025: -205.7 index (low)Jun 1, 2025: -216.5 index (low)Jun 11, 2025: 150 index (high)Jun 18, 2025: 163 index (high)Jun 26, 2025: 182 index (high)Jul 1, 2025: 136 index (high)Jul 11, 2025: 134 index (high)Jul 21, 2025: -171.4 index (low)Jul 26, 2025: 125 index (high)Jul 28, 2025: 130 index (high)Aug 5, 2025: 124 index (high)Aug 15, 2025: 150 index (high)Aug 20, 2025: 121 index (high)Sep 6, 2025: 103 index (high)Sep 14, 2025: 66 index (high)Sep 19, 2025: 84 index (high)Sep 24, 2025: 90 index (high)Sep 26, 2025: 43 index (low)Sep 29, 2025: 226 index (high)Oct 14, 2025: 99 index (high)Oct 16, 2025: 103 index (high)Oct 24, 2025: 109 index (high)Nov 3, 2025: 85 index (high)Nov 5, 2025: 95 index (high)Nov 8, 2025: 154 index (high)Nov 13, 2025: 75 index (high)Nov 18, 2025: 76 index (high)Nov 25, 2025: 76 index (high)Nov 28, 2025: 73 index (high)Dec 3, 2025: 3.3 index (low)Dec 8, 2025: 93 index (high)Dec 13, 2025: 74 index (high)Dec 15, 2025: 72 index (high)Dec 23, 2025: 80 index (high)Jan 2, 2026: 27 index (low)Jan 22, 2026: 21 index (low)Jan 27, 2026: 76 index (high)Feb 1, 2026: 93 index (high)Feb 6, 2026: 63 index (high)Feb 21, 2026: 61 index (high)Feb 26, 2026: 76 index (high)Mar 18, 2026: 121 index (high)Mar 28, 2026: 131 index (high)Apr 2, 2026: 174 index (high)Apr 4, 2026: 198 index (high)Apr 12, 2026: 220 index (high)Apr 17, 2026: 248 index (high)Apr 24, 2026: 259 index (high)May 7, 2026: 261 index (high)May 14, 2026: -171.2 index (low)May 17, 2026: -211.5 index (low)Jun 11, 2026: 193 index (high)Jun 16, 2026: 185 index (high)Jun 21, 2026: -2.5 index (low)Jun 26, 2026: 158 index (high)Jul 1, 2026: 157 index (high)Jul 11, 2026: 148 index (high)Jul 26, 2026: -120.7 index (low)Aug 5, 2026: 145 index (high)Aug 15, 2026: 117 index (high)Aug 30, 2026: 133 index (high)Sep 14, 2026: 144 index (high)Sep 29, 2026: 217 index (high)Oct 1, 2026: 129 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
Jan19305%
Feb322619%
Mar343026%
Apr375735%
May345747%
Jun319065%
Jul299462%
Aug367556%
Sep334742%
Oct353334%
Nov323634%
Dec293317%

By year (median / highest): 2016: 76 / 113 (11 scenes) · 2017: 22 / 148 (17 scenes) · 2018: 34 / 142 (37 scenes) · 2019: 22 / 132 (39 scenes) · 2020: 25 / 244 (41 scenes) · 2021: 40 / 97 (36 scenes) · 2022: 46 / 170 (45 scenes) · 2023: 81 / 174 (42 scenes) · 2024: 37 / 216 (32 scenes) · 2025: 76 / 226 (51 scenes) · 2026: 132 / 261 (30 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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