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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 Mid-Week Update for January 16, 2019

Current Conditions

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

  • Over the past week in Southwest Florida, K. brevis was observed at background to very low concentrations in Manatee County, background to high concentrations in Sarasota County, background to very low 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.

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.


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

Statewide Red Tide Status Map (January 16, 2019)

View a larger map (January 16, 2019)

The next complete status report will be issued on Friday, January 18th. 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