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Hackberry Bay NW of Grand Isle water level

Estuary gauge, Louisiana, United States

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Right now

Very high for mid-October

Water level

3.52ft Steady over the last 24 hours

Water temperature
71 °F
1 2 3

History

History
24ftOct 16Oct 17Oct 18Oct 19Oct 2124ftOct 16Oct 18Oct 21
24ftSep 22Sep 29Oct 6Oct 13Oct 2124ftSep 22Oct 6Oct 21
-024ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026-024ftOct 2025Apr 2026Oct 2026
-024ftJanMarMayJulSepNov2026-024ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

The gauge at Hackberry Bay NW of Grand Isle shows 3.52 ft, well above normal for mid-October.

That puts it 2.11 ft above the median of 1.41 ft for mid-October, based on 27 years of readings. A year ago it stood at 3.96 ft (−0.44 ft).

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 2.69 ft and 4.67 ft.

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

Compared with 27 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
1.41 ft2.11 ft above the median for this date
Normal for this date
0.78 ft – 2.72 ft8 years in 10 fall in this range (27 years of records)
Same day last year
3.96 ft−0.44 ft
Lowest and highest in 30 days
2.69 ft – 4.67 ft
Lowest and highest in 12 months
1.36 ft – 4.67 ft

High water at Hackberry Bay NW of Grand Isle

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

The forecast is not available right now.

Sunrise 07:06 AM Sunset 06:25 PM Daylight 11 hr, 19 min Waxing gibbous 74%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Barataria Waterway at Mud Lake S of LafitteRiver gauge, Barataria Waterway 6.47 ft Very low +0.12 ft 5.6 mi
Little Lake near Bay Dosgris E of GallianoLake, Little Lake 4.88 ft Low +0.14 ft 5.9 mi
Barataria Bay near Grand Terre IslandLake, Barataria Bay 2.63 ft Very low +0.17 ft 8 mi
Barataria Pass at Grand IsleRiver gauge, Barataria Pass 7.63 ft Highest on record ±0 10 mi
Bayou Perot at Point Legard near CutoffEstuary gauge, Bayou Perot 2.35 ft Normal +0.12 ft 14 mi
Naomi Diversion Canal near NaomiRiver gauge, Naomi Diversion Canal 1.58 ft Normal +0.25 ft 21 mi
Reggio Canal near Wills PointCanal gauge, Reggio Canal 1.60 ft High −0.27 ft 27 mi
Northeast Bay Gardene near Point-A-LA-HacheEstuary gauge, Northeast Bay Gardene 1.33 ft Normal +0.01 ft 29 mi

Questions and answers

How does Hackberry Bay NW of Grand Isle compare with last year?

It is 0.44 ft lower than on the same day last year, when the reading was 3.96 ft.

What is a normal level for Hackberry Bay NW of Grand Isle in mid-October?

The median for mid-October is 1.41 ft. In 8 years out of 10 the reading falls between 0.78 ft and 2.72 ft, based on 27 years of records.

What is the water level of Hackberry Bay NW of Grand Isle today?

On Oct 20, 2026, 09:15 PM CDT, the water level was 3.52 ft. Steady over the last 24 hours.

Is Hackberry Bay NW of Grand Isle rising or falling?

Steady over the last 24 hours. Down 0.17 ft over the last 7 days.

Is the level of Hackberry Bay NW of Grand Isle normal?

Very high for mid-October. Compared with 27 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:073802512 (Agency page)
Coordinates
29.39858, -90.04119 (WGS84)
Vertical datum
NAVD88
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 3.52 ft 2026-10-21 02:15 Provisional
Water temperature 71 °F 2026-10-21 02:00 Provisional

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How to cite

U.S. Geological Survey: Hackberry Bay NW of Grand Isle (usgs:073802512). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/louisiana/hackberry-bay-nw-of-grand-isle

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.