Heat Advisory
2026-08-12T19:00:00-04:00

* WHAT...Heat index values up to 108 expected. * WHERE...Portions of southwest and west central Florida. * WHEN...From noon today to 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Realtime Data

Florida

Caloosahatchee River

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Heat Advisory
Until 2026-08-12T19:00:00-04:00 • National Weather Service
* WHAT...Heat index values up to 108 expected. * WHERE...Portions of southwest and west central Florida. * WHEN...From noon today to 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

CALOOSAHATCHEE RIVER AT S-79, NR.OLGA, FLA

Realtime Data • Report • Conditions

1,600

Discharge (cfs)

1.5

Gauge Height (ft)

USGS 02292900

Streamflow discharge was last observed at 1,600 cfs, and a gauge height of 1.54 feet. With the % decrease since yesterday, the streamflow average over the past 10 days is 1,358 .

Weather today, Tomorrow,

The river has several tributaries, including the Peace River and the Kissimmee River, and is regulated by several dams, including the Franklin Lock and Dam. Seasonal trends show higher flows during wetter months and lower flows during drier months. The hydrology of the river is interesting because it has been heavily altered by human activity, including dredging and water management practices, which have impacted water quality and ecology. The river is also home to several endangered species, including the Florida manatee.

August 12, 2026

Last Updated
Colored dissolved organic matter (CDOM), water, in situ, single band excitation, fluorescence emission, ppb QSE	217.4 ug/l QSE
Gage height, ft	1.54 ft
Nitrate plus nitrite, water, in situ, mg/L as N	0.49 mg/l as N
Chlorophyll a, estimated, water, in-situ, in-vivo fluorescence (IVF), relative fluorescence units (RFU)	5.6 RFU
Streamflow, ft³/s	1600.0 ft3/s
Specific conductance, water, unfiltered, microsiemens per centimeter at 25°C	498.0 uS/cm @25C
Dissolved oxygen, water, unfiltered, mg/L	10.3 mg/l
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU)	3.8 FNU
pH, water, unfiltered, field, standard units	8.6 std units
Temperature, water, degC	27.7 deg C
Phycocyanins (cyanobacteria), water, in situ, fluorometric method, excitation at 590 ±15 nm, emission at 685 ±20 nm, relative fluorescence units (RFU)	1.48 RFU
Percent of Normal	60%
Year Over Year Average	2,680 cfs
24hr Flow Prediction	cfs
Maximum Recorded	21,000 cfs

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Caloosahatchee River At S-79, Nr.Olga, Fla Realtime Data

CALOOSAHATCHEE RIVER AT S-79, NR.OLGA, FLA

Realtime Data • Report • Conditions

1,600

Discharge (cfs)

1.5

Gauge Height (ft)

August 12, 2026

Seasonal Comparison

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Caloosahatchee River At S-79, Nr.Olga, Fla Realtime Data

CALOOSAHATCHEE RIVER AT S-79, NR.OLGA, FLA

Realtime Data • Report • Conditions

1,600

Discharge (cfs)

1.5

Gauge Height (ft)

August 12, 2026

Seasonal Comparison

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