Alliance
Louisiana: New Orleans, Lake Pontchartrain and the Delta (Slidell, Grand Isle, Venice) · USA
Plan route from AllianceShow on map
Alliance is a harbour in the Louisiana: New Orleans, Lake Pontchartrain and the Delta (Slidell, Grand Isle, Venice) cruising area, USA. The water depth in the harbour is about 20 m. The nearest harbour by water is Carlisle (0.8 nm). With Sailseer you can plan passages from here with weather from nine models, tides, currents and bridge times.
Harbour info
Water depth: Harbour 20 m
Depth source: EMODnet (estimate)
Location: 29° 41,54' N 089° 58,55' W
From OpenStreetMap (way/1357541173). Depth 20 m estimated off the entrance from the EMODnet model, not guaranteed. No name in OpenStreetMap, named after the nearest town.
10-day outlook
| Day | Wind kn | Gusts kn | from | Waves | Weather | |
|---|---|---|---|---|---|---|
| loading … | ||||||
Strongest wind and gust per day, mean of ECMWF and GFS; from day six only a trend. Hourly forecast, models and warnings on the map
Nearest harbours by water
- Carlisle 0.8 nm SE · Plan route
- Phoenix 4.1 nm SE · Plan route
- Harlem 5 nm SE · Plan route
- Nero 8 nm SE · Plan route
- Stella 8.4 nm N · Plan route
- Point Celeste 9.1 nm SE · Plan route
Harbour guides and charts
- OpenSeaMap Chart with buoys, lights and harbour details
- OpenStreetMap Map with paths, shops and addresses ashore
- Google Maps Satellite view, Street View, opening hours ashore
- Windy Webcams Webcams nearby
- Navily Photos, reviews, prices and berth booking
- noforeignland Anchorages, services and reports from cruising sailors
Rules and formalities
Frequently asked questions
How deep is the water at Alliance?
The water depth in the harbour is about 20 m. Source of the depth: EMODnet (estimate). Always rely on the chart and the echo sounder.
Which harbours are near Alliance?
By water: Carlisle (0.8 nm), Phoenix (4.1 nm), Harlem (5 nm), Nero (8 nm), Stella (8.4 nm), Point Celeste (9.1 nm).
What is the weather like in Alliance?
For Alliance, Sailseer shows the 10-day outlook from ECMWF and GFS and, on the map, the hourly forecast from nine models with official warnings and measured wind.
Sources: OpenStreetMap way/1357541173 (as of 2026-10-21) Location and facilities partly from OpenStreetMap (© OpenStreetMap contributors, ODbL).