Fall is here. Do the wave.

SEE
The Sant Ocean Hall
What: Take a dip into the museum’s newly opened aquatic wonderland with models of whales, prehistoric sharks, and a giant squid.
Why: Find Nemo.
When: Opens Sat. Daily, 10 a.m.-5:30 p.m.
Where: National Museum of Natural History, 10th St. & Constitution Ave. NW (202-633-1000).

The Fall Design House
What: Eight local interior designers showcase rooms inspired by haute fashion in the casa couture theme.
Why: Live en vogue.
When: Fri.-Dec. 13. Mon.-Fri, 10 a.m.-5 p.m.; Sat., 10 a.m.-3 p.m.
Where: The Washington Design Center, 300 D St. SW, b/t 3rd St. & Virginia Ave. (202-554-5053).

SHOP
Sugar Annual Fall Bash
What: Snag 25 percent off fall merch and one-of-a-kind jewelry from local designer Debra Fabian.
Why: Time to scarf some deals.
When: Thurs., 4-9 p.m.
Where: 1633 Wisconsin Ave., b/t Q St. & Reservoir Rd. (202-333-5331).

GO
Virginia Wine Festival
What: Sip, shop, and savor the East Coast’s largest grape-a-thon.
Why: Don’t keep it bottled up.
When: Sat. & Sun., 11 a.m.-6 p.m.
Where: Prince William County Fairgrounds, 10624 Dumfries Rd., Manassas (703-922-7049).

Second Annapolis Warehouse Sale
What: Horse, Saucy Shoes, and other great boutiques offer deep deals on summer items.
Why: Summer’s in the house.
When: Sun., noon–5 p.m.
Where: Loews Annapolis Hotel, 126 West St., Annapolis (410-280-8845).