Red Tide Status Update

Over the past week, red tide was detected in 47 samples collected from Southwest Florida. Bloom levels (>100,000 cells per liter) were not observed. We continue to use satellite imagery to help track this event.
  • In Southwest Florida over the past week, K. brevis was observed at very low concentrations in Pinellas County, background concentrations in Hillsborough County, background to very low concentrations in Manatee County, background to low concentrations in Sarasota County, background to very low concentrations in Charlotte County, background to very low concentrations in and offshore of Lee County, and background to very low concentrations in Collier County.
  • In Northwest Florida over the past week, K. brevis was not observed.
  • Along the Florida East Coast over the past week, K. brevis was not observed.

Reports of fish kills suspected to be related to red tide were received from Southwest Florida over the past week from Sarasota County. For more details, please visit saltwater/health/ and

Over the past week, respiratory irritation suspected to be related to red tide was reported via the Beach Conditions Reporting System and/or the Fish Kill Hotline in Southwest Florida in Sarasota County. For recent and current information at individual beaches, please visit and for forecasts that use FWC and partner data, please visit .

Forecasts by the USF-FWC Collaboration for Prediction of Red Tides for Pinellas County to northern Monroe County predict net southern movement of surface waters and southeastern transport of subsurface waters in most areas over the next 3.5 days.

The next status report will be issued on Friday, May 5th. Please check our daily sampling map, which can be accessed via the online status report on our Red Tide Current Status page. For more information on algal blooms and water quality, please visit Protecting Florida Together.

This information, including maps and reports with additional details, is also available on the FWRI Red Tide website. The website also provides links to additional information related to the topic of Florida red tide including satellite imagery, experimental red tide forecasts, shellfish harvesting areas, the FWC Fish Kill Hotline, the Florida Poison Information Center (to report human health effects related to exposure to red tide), and other wildlife related hotlines.

To learn more about various organisms that have been known to cause algal blooms in Florida waters, see the FWRI Red Tide Flickr page. Archived status maps can also be found on Flickr.       

The FWRI HAB group in conjunction with Mote Marine Laboratory now have a facebook page.  Please like our page and learn interesting facts concerning red tide and other harmful algal blooms in Florida.