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Nassau River near Tisonia water level

Tidal gauge, Nassau River, Florida, United States

Directions

Very high for mid-October

Water level

14.43ft Down 0.16 ft over the last 24 hours

Flow
7,450 cfs
12 13 14

History

121314ftOct 13Oct 14Oct 16Oct 18Oct 19121314ftOct 13Oct 16Oct 19
11121314ftSep 20Sep 27Oct 4Oct 12Oct 1911121314ftSep 20Oct 4Oct 19
101214ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026101214ftOct 2025Apr 2026Oct 2026
101214ftJanMarMayJulSepNov2026101214ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Nassau River near Tisonia shows 14.43 ft, well above normal for mid-October.

That puts it 2.23 ft above the median of 12.20 ft for mid-October, based on 25 years of readings. A year ago it stood at 12.45 ft (+1.98 ft).

The level is falling, down 0.16 ft over the past 24 hours. Over the past 30 days it has moved between 9.96 ft and 14.59 ft.

Compared with 25 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
12.20 ft2.23 ft above the median for this date
Normal for this date
11.42 ft – 12.91 ft8 years in 10 fall in this range (25 years of records)
Same day last year
12.45 ft+1.98 ft
Lowest and highest in 30 days
9.96 ft – 14.59 ft
Lowest and highest in 12 months
10.37 ft – 13.68 ft

High water at Nassau River near Tisonia

The National Weather Service splits flooding into minor, moderate and major flood stage, each tied to what starts to go under water at this particular gauge. Minor flooding usually means low roads, parks and farmland; major flooding reaches homes and businesses.

Keep children and dogs well back from the edge, and stay off flooded footpaths and towpaths.

Weather at the gauge

Rain in the last 3 days: 0.03 in. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 70° 56° – Wind 15 mph
20 Tue 72° 54° – Wind 11 mph
21 Wed 76° 54° – Wind 13 mph
22 Thu 75° 56° – Wind 11 mph
23 Fri 76° 59° – Wind 14 mph
24 Sat 73° 66° 0.72 in, 34% Wind 17 mph
25 Sun 73° 69° 0.26 in, 22% Wind 17 mph

Forecast: Open-Meteo

Sunrise 07:32 AM Sunset 06:52 PM Daylight 11 hr, 20 min First quarter 63%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Thomas Creek at Sh 115 near CallahanRiver gauge, Thomas Creek 12.22 ft Very high −0.30 ft 11 mi
Trout River near Jacksonville FlaTidal gauge, Trout River 2.49 ft Flooding +0.69 ft 11 mi
Cumberland Sound at Sea Camp Dock, near St MarysTidal gauge, Cumberland Sound 2.96 ft Flooding +0.25 ft 16 mi
St. Johns River at JacksonvilleTidal gauge, St. Johns River 13.28 ft Very high +1.19 ft 16 mi
Pottsburg Creek at Us90 near S. JacksonvilleTidal gauge, Pottsburg Creek 2.62 ft Flooding +0.29 ft 18 mi
Pottsburg Creek near South JacksonvilleRiver gauge, Pottsburg Creek 20.58 ft Normal +0.12 ft 20 mi
Cedar River at San Juan Avenue at JacksonvilleTidal gauge, Cedar River 13.88 ft Very high +0.45 ft 21 mi
Ortega River at Kirwin Road near JacksonvilleRiver gauge, Ortega River 7.29 ft High −0.22 ft 27 mi

Questions and answers

How does the Nassau River near Tisonia compare with last year?

It is 1.98 ft higher than on the same day last year, when the reading was 12.45 ft.

What is a normal level for the Nassau River near Tisonia in mid-October?

The median for mid-October is 12.20 ft. In 8 years out of 10 the reading falls between 11.42 ft and 12.91 ft, based on 25 years of records.

What is the water level of Nassau River near Tisonia today?

On Oct 19, 2026, 06:30 PM EDT, the water level was 14.43 ft. Down 0.16 ft over the last 24 hours.

Is Nassau River near Tisonia rising or falling?

Down 0.16 ft over the last 24 hours. Up 2.35 ft over the last 7 days.

Is the level of Nassau River near Tisonia normal?

Very high for mid-October. Compared with 25 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:02231291 (Agency page)
Coordinates
30.55079, -81.58982 (WGS84)
Update interval
every 15 minutes
Licence
Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Water level 14.43 ft 2026-10-19 22:30 Provisional
Flow 7,450 cfs 2026-10-19 17:30 Provisional

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How to cite

U.S. Geological Survey: Nassau River near Tisonia (usgs:02231291). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/florida/nassau-river-near-tisonia

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer