Red Tide Current Status

FWC reports on the current status of Karenia brevis blooms using tables, static maps, and interactive Google Earth maps. Archived status maps can be found in our Flickr gallery.

NEW: Daily Sample Map External Website

This map contains the last eight days of sampling and is updated daily at 5 p.m.
Please be sure to click on individual dots for sampling details.


Red Tide Status Update for November 9, 2018

Weekly Change November 3 to 9

Current Conditions
Bloom concentrations of the red tide organism, Karenia brevis, persist on Florida’s Southwest and Northwest coasts. Patchiness was observed in both areas. On the East Coast, bloom concentrations of K. brevis are no longer present. Additional details are provided below.

In Southwest Florida, observations of >1,000,000 K. brevis cells per liter (“high” concentrations) occurred from Pinellas to Lee counties. Relative to last week, K. brevis concentrations generally decreased in many areas of Manatee, Sarasota, and Collier counties, and increased in parts of Pinellas, Charlotte and Lee counties. In Northwest Florida, “medium” concentrations of K. brevis were observed in Santa Rosa County and in and offshore of Gulf County. On Florida’s East Coast, conditions improved in parts of Brevard and Martin counties where patchy bloom concentrations had been observed the week before.

  • In Southwest Florida over the past week, K. brevis was observed at background to high concentrations in Pinellas County, background to high concentrations in Manatee County, very low to high concentrations in Sarasota County, low to high concentrations in Charlotte County, background to high concentrations in Lee County, and background to very low concentrations in Collier County. For additional information, view the southwest coast report Adobe PDF and map Adobe PDF.
  • In Northwest Florida over the past week, K. brevis was observed at very low to medium concentrations in or offshore of Escambia County, low to medium concentrations in Santa Rosa County, low to medium concentrations in or offshore of Okaloosa County, low to medium concentrations in Bay County, low to medium concentrations in Gulf County, background concentrations in Franklin County, and background concentrations in Pasco County. For additional information, view the northwest coast report Adobe PDF and map Adobe PDF.
  • Along the Florida East Coast over the past week, K. brevis was observed at background concentrations in Brevard County, background concentrations in and offshore of St. Lucie County, very low to low concentrations in Martin County, background to very low concentrations in Palm Beach County, and very low concentrations in Miami-Dade County. For additional information, view the east coast report Adobe PDF and map Adobe PDF.

Fish Kills
In Southwest Florida over the past week, fish kill reports were received for multiple locations in Pinellas, Manatee, and Sarasota counties. In Northwest Florida, fish kills were reported in Escambia, Okaloosa, Walton, and Bay counties. No reports of fish kills were received over the past week for the Florida East Coast. More detailed information is available at /fishkill.

Respiratory Irritation
Respiratory irritation was reported over the past week in Southwest Florida (in Pinellas, Manatee, and Sarasota counties). Respiratory irritation was also reported in Northwest Florida (in Escambia and Okaloosa counties). No reports of respiratory irritation were received for the East Coast of Florida over the past week. For additional information, view the southwest coast report Adobe PDF, the northwest coast report Adobe PDF, and the east coast report Adobe PDF.

Forecasts by the USF-FWC Collaboration for Prediction of Red TidesExternal Website for Pinellas to northern Monroe counties predict net southern movement of surface waters and southeastern movement of subsurface waters over the next four days. Four-day forecasts for Escambia to Gulf counties predict variable movement of surface waters and net eastern transport of subsurface waters in most areas.


Red Tide Status Map (November 9, 2018)
Statewide Red Tide Counts November 1 through 8, 2018
View a larger map Adobe PDF (November 9, 2018)

To see detailed information on this week's samples, view the Statewide Google Earth Interactive Map (November 9, 2018)External Website.

By using Google Earth, you can zoom in to specific locations and click on stations to see detailed information, including sample date and cell concentration. You must have Google Earth installed on your computer to view this map; the software can be downloaded from the Google Earth websiteExternal Website.

The next complete red tide status report will be posted on Friday, November 9th. Please check our daily sampling map which can be accessed from the top of this page.


Archived status maps can be found in our Flickr galleryExternal Website. Previous regional status reports and maps can be found on our red tide resources page.

Latest Red Tide Status Report Available by Phone
Call 866-300-9399 at any time from anywhere in Florida to hear a recording about red tide conditions throughout the state. Callers outside of Florida can dial 727-552-2448. Standard calling charges apply.

Reports are updated on Friday afternoon except during holidays, in which case the report will be released on the closest day. Additional information, if available, is provided on Wednesday afternoon. To receive an e-mail when the current status has been updated, visit our subscription area.

Additional Information
For additional information about red tide and the current red tide bloom, including information on how to report a fish kill or other wildlife effects, consult health authorities about human exposure, or locate other resources, visit our Red Tide-Related Hotlines and Information Sources article.

Blue-Green Algae Bloom Information
Additional information regarding the current status of algal blooms in South Florida is being consolidated and posted on the Florida Department of Environmental Protection’s website: Website.


DescriptionKarenia brevis cells/literPossible Effects (K. brevis only)
NOT PRESENT - BACKGROUND background levels of 1,000 cells or less None anticipated
VERY LOW >1,000 to 10,000 Possible respiratory irritation; shellfish harvesting closures > 5,000 cells/L
LOW >10,000 to 100,000 Respiratory irritation, possible fish kills and bloom chlorophyll probably detected by satellites at upper limits
MEDIUM >100,000 to 1,000,000 Respiratory irritation and probable fish kills
HIGH >1,000,000

As above plus discoloration

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