Skip to main content

Red Tide Current Status

Daily Sample Map
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 December 6, 2019

Current Conditions

A patchy bloom of the red tide organism, Karenia brevis, persists in some areas of Southwest Florida. Additional details are provided below.

  • In Southwest Florida over the past week, K. brevis was observed at background and very low concentrations in Sarasota County, and background to medium concentrations in Charlotte, Lee, and Collier counties. Bloom concentrations (>100,000 K. brevis cells per liter) were observed in 7 samples from estuarine sites in Charlotte and Lee counties, and 3 samples from coastal or inlet sites in Collier County. High concentrations (>1 million K. brevis cells per liter) were not observed over the past week. For additional information, view the Southwest Coast report and map.
  • In Northwest Florida over the past week, K. brevis was observed at background concentrations in one sample collected from Bay County. For additional information, view the Northwest Coast report and map.
  • Along the Florida East Coast over the past week, K. brevis was not observed. For additional information, view the East Coast report and map.

Fish Kills

In Southwest Florida over the past week, fish kill reports were received for Charlotte, Lee, and Collier counties (please see

Respiratory Irritation

Respiratory irritation was reported over the past week in Southwest Florida in Sarasota, Lee, and Collier counties. Additional details are provided in the Southwest Coast report.


Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas to northern Monroe counties predict net western movement of surface waters and minimal net movement of subsurface waters in most areas over the next four days.

Red Tide Status Map (December 6, 2019)

Statewide Red Tide Counts November 28 through December 5, 2019

View a larger map (December 6, 2019).

To see detailed information on this week's samples, view the current Statewide Google Earth map for December 6th, 2019.

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 website

A midweek status update will be issued on Wednesday, December 11th and the next complete status report will be issued on Friday, December 13th. 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 galleryPrevious 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 727-502-4952. 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:

Key for Results

Description K. brevis abundance Possible effects (K. brevis only)
NOT PRESENT- BACKGROUND background levels of 1,000 cells or less no effects anticipated
VERY LOW > 1,000 - 10,000 cells/L possible respiratory irritation; shellfish harvesting closures when cell abundance equals or exceeds 5,000 cells/L
LOW > 10,000 - 100,000 cells/L respiratory irritation; shellfish harvesting closures; possible fish kills; probable detection of chlorophyll by satellites at upper range of cell abundance
MEDIUM > 100,000 - 1,000,000 cells/L respiratory irritation; shellfish harvesting closures; probable fish kills; detection of surface chlorophyll by satellites
HIGH > 1,000,000 cells/L as above, plus water discoloration