SW Florida & Dry Tortugas chlorophyll chart
Satellite data from
The southeastern Gulf of Mexico off southwest Florida — Naples, Marco Island, the Ten Thousand Islands and Cape Sable — west across the shelf to Pulley Ridge and south to Key West, the Marquesas and the Dry Tortugas.
Today’s read
| Station | Water | Observed |
|---|---|---|
| Loop Current Pressure Point Buoy, 70m Isobath (42026) | 85.3°F | |
| WFS South Buoy, 50m Isobath (42023) | 85.3°F | |
| Satan Shoal, FL (42095) | 86.0°F | |
| Key West, FL (KYWF1) | 86.4°F | |
| Vaca Key, FL (VCAF1) | 86.2°F |
On this chart: Naples, Key West, the Dry Tortugas, Marco Island, the Marquesas Keys, the Ten Thousand Islands, Cape Sable and Pulley Ridge.
How to read today’s Eastern Gulf chart
Work the colour line. Green water is productive and blue water is clean; bait stacks on the seam between them, and gamefish hunt that seam. The contours above trace the productivity edges so the line is something you can put a waypoint on.
The highest-percentage water offshore is where a chlorophyll edge lines up with a temperature break. Check this against the Eastern Gulf SST chart and start where they overlap.
Pair it with temperature
Chlorophyll shows you the food. Temperature shows you whether the conditions suit the fish you are after. See today’s Eastern Gulf SST chart →
Frequently asked
How often does the Eastern Gulf chlorophyll chart update?
The image is regenerated twice a day from the latest satellite chlorophyll data in the Catalysst app, rendered on a log scale and clipped to the coastline. The date shown is the date of the satellite data, which moves forward about once a day.
What area does the Eastern Gulf chlorophyll chart cover?
From 23.7°N to 26.3°N and 85.0°W to 81.0°W. Ports and landmarks on it include Naples, Key West, the Dry Tortugas, Marco Island, the Marquesas Keys, the Ten Thousand Islands, Cape Sable and Pulley Ridge.
Do you fish the green water or the blue water?
Neither — you fish the edge between them. Bait gets pushed against the clean-water line and predators hunt that seam. The highest-percentage water is where a chlorophyll edge stacks on top of a temperature break.
Why does chlorophyll matter if I already have SST?
Temperature tells you where conditions suit the predator; chlorophyll tells you where the food is. A break with no bait on it is just a line in the water.
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