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Red Tide Current Status

NEW: 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 January 18, 2019

Current Conditions

A patchy bloom of the red tide organism, Karenia brevis, persists in Southwest Florida. “High” cell concentrations (>1,000,000 K. brevis cells per liter) were observed in Sarasota County and offshore of Collier County.  “Medium” K. brevis concentrations were detected in or offshore of these same counties and in Charlotte County. Additional details from statewide sampling are provided below.

  • In Southwest Florida over the past week, K. brevis was observed at background to high concentrations in Sarasota County, very low to medium concentrations in Charlotte County, background to low concentrations offshore of Lee County, very low to high concentrations in or offshore of Collier County, and background to low concentrations offshore of Monroe County.  For additional information, please view the southwest coast report and map.
  • In Northwest Florida over the past week, K. brevis was not observed. For additional information, view the northwest coast report and map.
  • Along Florida’s East Coast over the past week, K. brevis was not observed. For additional information, view the east coast report and map.

Fish Kills

No fish kills suspected to be related to red tide were reported this week (please see

Respiratory Irritation

Respiratory irritation was reported over the past week in Pinellas, Manatee, and Sarasota 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 southern transport of surface and subsurface waters in most areas over the next four days.

Statewide Red Tide Status Map (January 18, 2019)

View a larger map (January 18, 2019)

To see detailed information on this week's samples, view the current Statewide Google Earth map for January 18, 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 available on Wednesday, January 23rd and the next complete status report will be issued on Friday, January 25th. 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 727-552-2448. 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:

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