Gulf Coast Gauges

Bayou Lafourche at Napoleonville water level

USGS gauge 07380500 · Assumption Parish · Houma–Thibodaux · NWS gauge NPVL1

4.50 ft

gage height, Oct 23, 2026 at 2:00 PM CDT · 4 hours ago

Highest since 2015 (USGS)
9.68 ft (August 13, 2016)
Usual range
4.27 to 5.24 ft

USGS marks recent readings as provisional: they can be revised after review.

No National Weather Service alert covering Assumption Parish was active when this page was generated (Oct 23, 2026 at 5:50 PM CDT). Alerts are issued and expire at any time; the current list is at alerts.weather.gov.

Last 7 days

4.3 4.8 5.2 Oct 17 Oct 18 Oct 19 Oct 20 Oct 21 Oct 22 Oct 23

Hourly averages of USGS readings. The shaded band is this gauge's usual range: the middle 80% of its readings since September 11, 2026.

How to read this gauge

Gage height is the height of the water surface above the gauge's zero point. This gauge's zero is set at 0 ft NAVD88, so its gage height is the water surface elevation above that datum. It is not a water depth.

Daily highs and lows since September 11, 2026

4.2 4.7 5.3 2026-09-11 – 2026-10-23 · bars are daily low to high

Annual peaks since 2015

In 12 complete water years of comparable USGS records (since 2015), the highest peak was 9.68 ft on August 13, 2016. So far in water year 2027 (since October 1) the highest reading is 5.04 ft on October 20, 2026.

5 6 7 9 10 2015 2020 2025 Water year 2015: 7.43 ft on April 14, 2015 Water year 2016: 9.68 ft on August 13, 2016 Water year 2017: 8.55 ft on May 4, 2017 Water year 2018: 7.30 ft on April 14, 2018 Water year 2019: 6.80 ft on November 1, 2018 Water year 2020: 7.23 ft on May 14, 2020 Water year 2021: 8.54 ft on May 18, 2021 Water year 2022: 6.56 ft on February 4, 2022 Water year 2023: 6.97 ft on December 30, 2022 Water year 2024: 9.03 ft on September 12, 2024 Water year 2025: 7.29 ft on July 17, 2025 Water year 2026: 6.97 ft on June 18, 2026 Water year 2027 so far: 5.04 ft on October 20, 2026 2016 2024 2017

Each dot is the highest gage height of a water year (October to September), from the USGS annual peak record, with recent years USGS has not published yet taken from its 15-minute readings and this site's own; hover a dot for its date. Dashed lines are NWS flood stages.

NWS historic crests

DateCrestAbove minor flood stage
August 13, 20169.68 ft—
May 4, 20178.55 ft—
March 11, 20167.90 ft—
April 14, 20157.46 ft—

The highest crests the National Weather Service lists for this gauge, as published. They can differ from the USGS annual peaks above: USGS records the year's highest gage height, which is not always the crest the NWS lists for the same flood.

Download the readings

bayou-lafourche-at-napoleonville.csv (CSV): every reading stored for this gauge since September 11, 2026, 4,045 rows, with time in UTC and Central, gage height in feet, and the USGS approval status.

Source. Gage height from the U.S. Geological Survey. This site is not affiliated with either agency.