St. Marys River near Macclenny water level

Name: St. Marys River near Macclenny water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, St. Marys River, Florida, United States

Directions

High for mid-October

Water level

5.98ft Down 0.56 ft over the last 24 hours

Measured Oct 19, 2026, 02:45 PM EDT (51 min ago)

Flow: 446 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

The St. Marys River near Macclenny is above normal at 5.98 ft.

That puts it 2.77 ft above the median of 3.21 ft for mid-October, based on 99 years of readings. It is 6.02 ft below the flood stage of 12.00 ft. A year ago it stood at 2.09 ft (+3.89 ft).

It has dropped 0.56 ft over the past 24 hours. In the last month it has stayed between 2.34 ft and 12.34 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 99 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 3.21 ft2.77 ft above the median for this date
Normal for this date: 1.25 ft – 8.50 ft8 years in 10 fall in this range (99 years of records)
Same day last year: 2.09 ft+3.89 ft
Lowest and highest in 30 days: 2.34 ft – 12.34 ft
Lowest and highest in 12 months: 1.61 ft – 12.34 ft
Highest on record: 24.38 ftJune 28, 2012

Floating and fishing near St. Marys River near Macclenny

Experienced paddlers may enjoy higher water, but many outfitters stop rentals once a river runs this high.

Flood stage here is 12.00 ft, 6.02 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

20.00 ft: High banks on the Florida side begin to overflow. Trailers and houses along the river in Baker County are endangered. Trailers and houses on the Georgia side near Stokesville are endangered.
17.00 ft: High water on the river reaches the bottom of the Stokes Road Bridge.
16.00 ft: Access roads on both sides of the river in Florida and Georgia are flooded, including the entire low lying stretch of St. Mary's River Bluff Road on the Georgia side which cuts off 40 to 50 homes. On the Florida side, the lower end of St. Mary's Cove Road past the public boat ramp becomes flooded and cuts off access to 20 to 30 homes. The Stokes Road Bridge over the river is generally closed due to high water.
15.00 ft: Flooding begins to impact the lower end of Steel Bridge Road on the Florida side and cuts off access to the river gage as well as access to several homes.
14.00 ft: Flooding of bottomlands along the river and some lower access roads including the lower half of St. Mary's River Bluff Road which cuts off 15 to 20 homes on the Georgia side.
12.00 ft: Minor flooding of low lying areas and timber lands including some properties along St. Mary's River Bluff Road and the Cypress Landing Resort on the Georgia side.
5.98 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Chance of at least minor flooding in October to December: 40 %.

Rank	Level	Date
1	24.38 ft	June 28, 2012
2	23.25 ft	September 13, 1964
3	22.86 ft	April 5, 1973
4	22.32 ft	September 12, 2017
5	22.29 ft	September 25, 1947
6	21.97 ft	April 3, 1948
7	21.96 ft	September 7, 1950
8	21.90 ft	September 20, 1928
9	21.23 ft	October 22, 1950
10	21.14 ft	August 24, 2008

Weather at the gauge

No rain in the last 3 days.

19 Mon 70° 54° – Wind 11 mph

20 Tue 71° 51° – Wind 9 mph

21 Wed 77° 50° – Wind 8 mph

22 Thu 77° 54° – Wind 7 mph

23 Fri 78° 56° – Wind 10 mph

24 Sat 72° 60° 0.28 in Wind 13 mph

25 Sun 72° 61° – Wind 12 mph

Forecast: Open-Meteo

Sunrise 07:34 AM Sunset 06:54 PM Daylight 11 hr, 20 min First quarter 61%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
North Prong St. Marys River at MoniacRiver gauge, North Prong St. Marys River	6.66 ft	Normal	−0.28 ft	14 mi
North Fork Black Creek near MiddleburgRiver gauge, North Fork Black Creek	2.30 ft	Normal	−0.02 ft	20 mi
Cedar River at San Juan Avenue at JacksonvilleTidal gauge, Cedar River	13.34 ft	Very high	+0.11 ft	21 mi
Ortega River at Kirwin Road near JacksonvilleRiver gauge, Ortega River	7.34 ft	High	−0.22 ft	22 mi
Thomas Creek at Sh 115 near CallahanRiver gauge, Thomas Creek	12.26 ft	Very high	−0.30 ft	22 mi
Trout River near Jacksonville FlaTidal gauge, Trout River	1.91 ft	Flooding	−0.35 ft	23 mi
North Fork Black Creek at MiddleburgRiver gauge, North Fork Black Creek	13.70 ft	Very high	+0.03 ft	23 mi
St. Johns River at JacksonvilleTidal gauge, St. Johns River	12.18 ft	High	−0.11 ft	25 mi

Questions and answers

How does the St. Marys River near Macclenny compare with last year?

It is 3.89 ft higher than on the same day last year, when the reading was 2.09 ft.

What is flood stage for the St. Marys River near Macclenny?

The official flood stage is 12.00 ft. The level is currently 6.02 ft below it.

What is a normal level for the St. Marys River near Macclenny in mid-October?

The median for mid-October is 3.21 ft. In 8 years out of 10 the reading falls between 1.25 ft and 8.50 ft, based on 99 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of St. Marys River near Macclenny today?

On Oct 19, 2026, 02:45 PM EDT, the water level was 5.98 ft. Down 0.56 ft over the last 24 hours.

Is St. Marys River near Macclenny rising or falling?

Down 0.56 ft over the last 24 hours. Down 5.81 ft over the last 7 days.

Is the level of St. Marys River near Macclenny normal?

High for mid-October. Compared with 99 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:02231000 (Agency page)
Coordinates: 30.35885, -82.08150 (WGS84)
Vertical datum: NGVD29
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	5.98 ft	2026-10-19 18:45	Provisional
Flow	446 cfs	2026-10-19 18:45	Provisional

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How to cite

U.S. Geological Survey: St. Marys River near Macclenny (usgs:02231000). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/florida/st-marys-river-near-macclenny

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