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Mississippi Sound at Usgs Merrill Shell Bank Light water level

Estuary gauge, Mississippi Sound, Mississippi, United States

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Right now

Normal for mid-October

Water level

3.54ft Up 0.12 ft over the last 24 hours

Water temperature
71 °F
1 3 4

History

History
24ftOct 16Oct 17Oct 18Oct 19Oct 2124ftOct 16Oct 18Oct 21
24ftSep 22Sep 29Oct 6Oct 13Oct 2124ftSep 22Oct 6Oct 21
-0358ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026-0358ftOct 2025Apr 2026Oct 2026
-0358ftJanMarMayJulSepNov2026-0358ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

Water levels are unremarkable at Mississippi Sound at Usgs Merrill Shell Bank Light, where the gauge shows 3.54 ft.

That puts it 0.19 ft above the median of 3.35 ft for mid-October, based on 20 years of readings. A year ago it stood at 3.64 ft (−0.10 ft).

It is on the way up, by 0.12 ft over the past 24 hours. The 30-day range is 2.82 ft – 5.02 ft.

The sensor also reports a water temperature of 71 °F.

Compared with 20 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
3.35 ft0.19 ft above the median for this date
Normal for this date
0.75 ft – 4.22 ft8 years in 10 fall in this range (20 years of records)
Same day last year
3.64 ft−0.10 ft
Lowest and highest in 30 days
2.82 ft – 5.02 ft
Lowest and highest in 12 months
0.87 ft – 5.18 ft

Weather at the gauge

The forecast is not available right now.

Sunrise 07:04 AM Sunset 06:21 PM Daylight 11 hr, 17 min Waxing gibbous 74%

Map

Other gauges on the Mississippi Sound

Gauge Level Compared with normal 24 hours Distance
Mississippi Sound at Usgs Round Island LightTidal gauge, Mississippi Sound 2.64 ft No reference yet +0.04 ft 40 mi

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Wolf River at Belle Ferry Road near Long BeachTidal gauge, Wolf River 2.75 ft Below flood stage +0.27 ft 11 mi
Jourdan River near Bay St LouisRiver gauge, Jourdan River 1.36 ft Normal +0.08 ft 16 mi
Wolf River near LandonRiver gauge, Wolf River 4.13 ft Very low ±0 17 mi
Biloxi River near LymanRiver gauge, Biloxi River 5.20 ft Below flood stage +0.31 ft 21 mi
Biloxi River at WorthamRiver gauge, Biloxi River −0.93 ft Low ±0 23 mi
Biloxi Bay at Point Cadet Harbor at BiloxiEstuary gauge, Biloxi Bay 0.92 ft Normal +0.20 ft 25 mi
Tchoutacabouffa River near D'ibervilleRiver gauge, Tchoutacabouffa River 1.82 ft Below flood stage +0.29 ft 27 mi
Pearl River at I-10 near SlidellRiver gauge, Pearl River 2.62 ft Very low −0.04 ft 28 mi

Questions and answers

How does the Mississippi Sound at Usgs Merrill Shell Bank Light compare with last year?

It is 0.10 ft lower than on the same day last year, when the reading was 3.64 ft.

What is a normal level for the Mississippi Sound at Usgs Merrill Shell Bank Light in mid-October?

The median for mid-October is 3.35 ft. In 8 years out of 10 the reading falls between 0.75 ft and 4.22 ft, based on 20 years of records.

What is the water level of Mississippi Sound at Usgs Merrill Shell Bank Light today?

On Oct 20, 2026, 09:45 PM CDT, the water level was 3.54 ft. Up 0.12 ft over the last 24 hours.

Is Mississippi Sound at Usgs Merrill Shell Bank Light rising or falling?

Up 0.12 ft over the last 24 hours. Up 0.30 ft over the last 7 days.

Is the level of Mississippi Sound at Usgs Merrill Shell Bank Light normal?

Normal for mid-October. Compared with 20 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:301429089145600 (Agency page)
Coordinates
30.23825, -89.24282 (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 3.54 ft 2026-10-21 02:45 Provisional
Water temperature 71 °F 2026-10-21 02:45 Provisional

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How to cite

U.S. Geological Survey: Mississippi Sound at Usgs Merrill Shell Bank Light (usgs:301429089145600). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/mississippi/mississippi-sound-at-usgs-merrill-shell-bank-light

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.