This Week's Water Conditions Update

October 10, 2025

Water Conditions Tracker

Lake Okeechobee Levels & Caloosahatchee Flow Impacts

On 10/8/25 Lake Okeechobee was at 13.63 feet, increasing by 0.12 feet in the past week. The weekly average flow at S-79 was 1,620 cfs (cubic feet per second) and flow from the Lake at S-77 was an average of 2 cfs. The 14-day average flow at S-77 was 0 cfs. The 14-day average flow at S-79 was 2,762 cfs and has been in the damaging flow envelope (>2,600 cfs; RECOVER 2020) for 36 days.

For more information on Lake Okeechobee and estuary conditions go to the latest Caloosahatchee Conditions Report.

Water Surface Temperature

This Week

Daily Average for October 8, 2025


Gulf of Mexico: 83.8°F

Caloosahatchee (Beautiful Island): 86.1°F

Lake Okeechobee: 83.5°F

Last Week

Daily Average for October 1, 2025


Gulf of Mexico: 85.5°F

Caloosahatchee (Beautiful Island): 87.1°F

Lake Okeechobee: 84.6°F


What is Colored Dissolved Organic Matter?

Have you ever wondered why the Caloosahatchee is brown? Have you noticed during the rainy season that the waters around Sanibel have turned from a beautiful azure to a murky, less-than-desirable shade? Colored Dissolved Organic Matter (CDOM) is one of the water quality parameters impacting water color that the SCCF Marine Laboratory monitors through its River, Estuary, and Coastal Observing Network (RECON).

Weekly Rainfall Totals

WP Franklin (S-79): 0.05" Ortona (S-78): 1.44" Julian Keen Jr. (S-77): 0.00"

Virtual Water Quality Tour from Lighthouse Beach Park

Click here or on the image above to take a virtual tour from above Lighthouse Beach Park to see how the water looked this week. Photo was taken on 10/7/25 at 12:15 PM on a rising tide (2.6 ft). The 14-day average flow at S-79 was 2,762 cfs.

Red Tide

On 10/3/25, the FWC reported that the red tide organism, Karenia brevis, was observed in seven samples collected along Florida’s Gulf coast. K. brevis was observed in Southwest Florida at background concentrations offshore of Hillsborough County and in Northwest Florida at very low to medium concentrations in Gulf County.


Wildlife Impacts

In the past week, the CROW wildlife hospital on Sanibel admitted 3 patients for suspected red tide/toxicosis: 1 juvenile brown pelican (still in care), 1 adult snowy egret (deceased) and 1 juvenile anhinga (deceased). 

Blue-Green Algae

On 10/6/25, sampling for cyanobacteria by the Lee County Environmental Lab reported no visible cyanobacteria across all sites.

On 10/5/25 satellite imagery of Lake Okeechobee showed the presence of an algal bloom covering about 140 square miles, or 30% of the lake. This is a decrease in area from the previous measurement of the bloom on 9/28/25 which covered about 160 square miles, or 34% of the lake.

Become a Citizen Scientist and Get the Algae Reporting App Today!

SCCF wants to know when and where all types of algae sightings occur to monitor conditions around the islands and to investigate algae bloom occurrence with patterns in seasonal weather changes and Lake Okeechobee water management practices.


Click on and bookmark this link to report an algal bloom sighting.

Resources To Follow:

To learn more about our current water conditions, click on the following links:


Water Quality Dashboard


Water Quality FAQ

Find answers to some of our most commonly asked questions regarding water quality and more.


Water Conditions Update Archive


Caloosahatchee Conditions Report

A collaborative, weekly analysis, including recommendations for water managers regarding Lake Okeechobee flows.


RECON

SCCF's River, Estuary, and Coastal Observing Network is a network of eight optical water quality sensors deployed throughout the Caloosahatchee and the Pine Island Sound estuary to provide real-time water quality data.


Caloosahatchee River Virtual Tour



Red Tide Resources


NOAA HAB Monitoring System - Lake Okeechobee

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