Protect yourself and family against Florida Red Tide exposure. Please read signage when you go to area beaches. Not all beaches are affected. Conditions can change daily. Check the Mote Marine twice daily Beach Conditions Report at https://www.visitbeaches.org/ or call 1-941-BEACHES

Red Tide Observed Effects at Monitored Beaches
Location	Date	Cell Count /L
Longboat Key	09/08/2025	0
Bird Key Park	09/08/2025	0
North Lido Beach	09/08/2025	0
Lido Beach (Casino)	09/08/2025	0
South Lido Park	09/08/2025	0
Siesta Key	09/08/2025	0
Turtle Beach	09/08/2025	0
Nokomis Beach	09/08/2025	0
North Jetty	09/08/2025	0
Venice Beach	09/08/2025	0
Service Club Park	09/08/2025	0
Venice Fishing Pier	09/08/2025	0
Brohard Beach	09/08/2025	0
Caspersen Beach	09/08/2025	N/A	Beach Closed
Manasota Beach	09/08/2025	0
Blind Pass	09/08/2025	0

Table Data Last Modified: Mon Sep 22, 2025 14:29:45 EDT


Description	Karenia brevis cells/L	Possible Effects (Karenia brevis only)
Not present in background	0 - 1,000	None Anticipated
Very Low	> 1,000 - 10,000	Possible respiratory irritation; shellfish harvesting closures > 6 cells/mL
Low	> 10,000 -< 100,000	Respiratory irritation; possible fish kills and bloom chlorophyll probably detected by satellites at upper range.
Medium	> 101,000 -< 1,000,000	Respiratory irritation and probably fish kills
High	> 1,000,000	As above plus discoloration

Table Data Last Modified: Thu Nov 14, 2024 11:30:41 EST

Red tides have been documented along Florida's gulf coast since the 1840’s.

The Florida red tide organism, Karenia brevis, produces a toxin that may kill marine animals and affect humans.
A red tide bloom is a higher-than-normal concentration of a microscopic alga (plant-like organisms).

It is important to realize that many people still enjoy the beaches during red tides. Respiratory irritation and dead fish are not always present.People may experience respiratory irritation (coughing, sneezing, and tearing) when the red tide organism is present along a coast and winds blow its aerosol onshore.

People with severe or chronic respiratory conditions are advised to avoid red tide areas.
Generally, symptoms are temporary.
Swimming in waters with red tide is safe for most people.
However, red tide may cause some people to suffer from skin irritation and burning eyes.
If you experience irritation, get out of the water and thoroughly wash.
For more information regarding red tide, visit our Links to our Partners

A Red Tide Rack Card [PDF 2.36MB] with useful facts and tips about red tide is available.

Florida Health | Go to the full page experience