Biloxi is the closest but it_s not much of a beach, more like a place to go to gamble.
Dauphin Island is 160 miles or 2 1/2 hours turn right at Mobile.
how about a water park in Baton Rouge?
http://www.bluebayou.com/
90 miles- 1 hour and 23 minutes- Biloxi, MS
106 miles- 2 hours and 28 minutes- Grand Isle, La
188 miles- 3 hours and 10 minutes- Guf Shores, AL
Grand Isle is my personal favorite. The Gulf of Mexico crashes right onto the clean white sand, and there_s rarely anyone else out when I go. Great for surf fishing, also the little run offs that aren_t so choppy are awesome for regular ol_ fishing pole fishing. Its great for laying out and catching some peaceful warm rays.
New Orleans is surrounded by a lake (Lake Ponchitrain) and a river (The Mississippi). Neither off _beach like_ shores. The Miss. is more of an industrial marine travel way and the Lake, well, in 2007 I caught a 15 pound sting ray, a four foot bull shark, and a four foot alligator gar out of Lake Ponchitrain where Bally_s Casino used to be at the Belle of Orleans at the Levee (by that little air port). So I wouldn_t go swimming in there if I were you.
Good luck.
If swimming isn_t essential and you just want to sun-bathe, you can go to the lakefront, which is a very nice miles-long linear park. Commercial development is prohibited in the lakefront park, but there are numerous shelters (open-air but with bathrooms _ picnic tables) scattered along its length.
You can reserve a shelter by calling the Orleans Levee District (a government agency): Tel. 504-286-3100
http://www.orleanslevee.com/
To get to the lakefront park from downtown, either take Elysian Fields Avenue to the lake and turn left, or take I-10 West to the West End exit, take West End Blvd. to the lake and turn right.
The first shelter (actually Shelter # 1) is about 100 yards to the right (from West End Blvd) after you reach the lake.
There are also several restaurants in the West End area, such as Russell_s Marina Grill (great food) and Landry_s (OK food, great view).
It in Jefferson Parish. If you need any more info, or directions, I_d be happy to help you out. Just email me.
it_s only about 2 hours from NO and if you_d like directions you can email me