North Prong St. Marys River at Moniac water level

Name: North Prong St. Marys River at Moniac 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, North Prong St. Marys River, Florida, United States

Directions

Normal for mid-October

Water level

6.61ft Down 0.27 ft over the last 24 hours

Measured Oct 19, 2026, 06:45 PM EDT (41 min ago)

Flow: 71.8 cfs

History

7 days 30 days 1 year

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

What this means

Water levels are unremarkable at North Prong St. Marys River at Moniac, where the gauge shows 6.61 ft.

The median for mid-October is 5.40 ft, based on 78 years of readings, so the river stage is 1.21 ft above typical. It is 5.39 ft below the flood stage of 12.00 ft. On the same day last year the reading was 3.74 ft, a difference of +2.87 ft.

It is still going down, by 0.27 ft over the past 24 hours. The 30-day range is 4.26 ft – 9.30 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 78 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.40 ft1.21 ft above the median for this date
Normal for this date: 4.33 ft – 8.26 ft8 years in 10 fall in this range (78 years of records)
Same day last year: 3.74 ft+2.87 ft
Lowest and highest in 30 days: 4.26 ft – 9.30 ft
Lowest and highest in 12 months: 3.68 ft – 9.30 ft
Highest on record: 22.98 ftApril 5, 1973

Paddling and fishing conditions

Most paddlers and anglers will find the river in good shape at this stage.

For reference, flood stage is 12.00 ft.

What happens at each level

17.00 ft: Trailers and houses on both sides of the river become endangered.
15.00 ft: Flooding begins to impact Mocassin Creek Circle on Florida side with some portions of the road becoming cut-off. Access roads on both sides of the river in Florida and Georgia begin to flood.
14.00 ft: Bethea State Forest campground sites completely flooded on Florida side and water begins to enter campground parking lot.
12.00 ft: Bethea State Forest campground sites begin to flood on the Florida side just north of the gage.
6.61 ft: Right now

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

Highest crests on record

Rank	Level	Date
1	22.98 ft	April 5, 1973
2	19.90 ft	September 19, 1928
3	19.15 ft	August 24, 2008
4	18.69 ft	June 28, 2012
5	18.41 ft	September 13, 1964
6	17.78 ft	September 9, 2004
7	17.57 ft	March 30, 1970
8	17.51 ft	September 13, 2017
9	17.03 ft	February 18, 1998
10	16.38 ft	September 29, 2004

Weather at the gauge

No rain in the last 3 days.

19 Mon 70° 53° – Wind 11 mph

20 Tue 72° 51° – Wind 10 mph

21 Wed 77° 49° – Wind 8 mph

22 Thu 77° 53° – Wind 7 mph

23 Fri 78° 55° – Wind 11 mph

24 Sat 70° 58° 0.05 in Wind 13 mph

25 Sun 74° 60° – Wind 13 mph

Forecast: Open-Meteo

Sunrise 07:34 AM Sunset 06:55 PM Daylight 11 hr, 20 min First quarter 63%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
St. Marys River near MacclennyRiver gauge, St. Marys River	5.89 ft	High	−0.54 ft	14 mi
St Marys River at Ferry Landing near FolkstonRiver gauge, St Marys River	4.55 ft	Below flood stage	−0.78 ft	22 mi
Suwannee River above FargoRiver gauge, Suwannee River	9.49 ft	High	−0.32 ft	23 mi
Suwannee River at US 441, at FargoRiver gauge, Suwannee River	7.48 ft	High	−0.29 ft	23 mi
Thomas Creek at Sh 115 near CallahanRiver gauge, Thomas Creek	12.21 ft	Very high	−0.29 ft	28 mi
Trout River near Jacksonville FlaTidal gauge, Trout River	2.49 ft	Flooding	+0.69 ft	33 mi
Suwannee River at White SpringsRiver gauge, Suwannee River	56.11 ft	High	−0.18 ft	33 mi
Cedar River at San Juan Avenue at JacksonvilleTidal gauge, Cedar River	13.81 ft	Very high	+0.36 ft	33 mi

Questions and answers

Is the North Prong St. Marys River at Moniac higher than last year?

Yes, it is 2.87 ft higher than on the same day last year, when the reading was 3.74 ft.

What is flood stage for the North Prong St. Marys River at Moniac?

The official flood stage is 12.00 ft. The level is currently 5.39 ft below it.

What is a normal level for the North Prong St. Marys River at Moniac in mid-October?

The median for mid-October is 5.40 ft. In 8 years out of 10 the reading falls between 4.33 ft and 8.26 ft, based on 78 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 North Prong St. Marys River at Moniac today?

On Oct 19, 2026, 06:45 PM EDT, the water level was 6.61 ft. Down 0.27 ft over the last 24 hours.

Is North Prong St. Marys River at Moniac rising or falling?

Down 0.27 ft over the last 24 hours. Down 2.41 ft over the last 7 days.

Is the level of North Prong St. Marys River at Moniac normal?

Normal for mid-October. Compared with 78 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:02228500 (Agency page)
Coordinates: 30.51773, -82.23040 (WGS84)
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	6.61 ft	2026-10-19 22:45	Provisional
Flow	71.8 cfs	2026-10-19 22:45	Provisional

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How to cite

U.S. Geological Survey: North Prong St. Marys River at Moniac (usgs:02228500). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/florida/north-prong-st-marys-river-at-moniac

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