LONG ISLAND BIENNIAL (July 31-Sept. 26)
Heckscher Museum of Art, Huntington, 631-351-3250, heckscher.org

In observance of its 90th anniversary, the Heckscher presents the inaugural Long Island Biennial featuring contemporary works by about 40 artists who live and work in Nassau or Suffolk. The jurors selecting the art are Isabelle Dervaux, curator of modern and contemporary drawings, Morgan Library & Museum; Renato Danese, Danese gallery, both in Manhattan, and Richard Lippe, a Long Island collector of American art. Cinema Arts Centre will jury and present video and film entries.

UNDERGROUND POP (Aug. 15-Oct. 3)
Parrish Art Museum, Southampton, 631-283-2118, parrishart.org

Ten artists from all across the country create do-it-yourself generational interpretations of the Pop tradition in modes of expression ranging from vaudeville-style videos to Italian ecclesiastical architecture as well as cult-hero obsessions and gay subculture themes.

WINSLOW HOMER: THE PLEASURE OF SUMMER (June 19-July 25)
Guild Hall, East Hampton, 631-324-0806, guildhall.org

The great landscape artist and printmaker of post-Civil War America gets a retrospective focusing on the season of beaches, flowering meadows and cool mountain streams. Homer's depictions of hiking and horseback riding, idyllic weather, youthful frolics and the cleansing tides bespoke a new beginning for an America torn asunder by war with itself.

Pictures by Women: A History of Modern Photography (Through March 21, 2011)
Museum of Modern Art, Manhattan, 212-708-9400, moma.org

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Often objectified in photographs, women also have pushed the medium through experimentation with single-frame storytelling. Among the 200-plus photographs is a range of masterworks and new acquisitions by, among many others, Diane Arbus, Berenice Abbott, Nan Goldin, Cindy Sherman and Kiki Smith, as well as a large-scale Fluxus wallpaper by Yoko Ono.

THE SEA AROUND US (June 5-Sept. 12)
Nassau County Museum of Art, 516-484-9337, nassaumuseum.org

Human fascination with the oceans, gulfs and other seemingly endless bodies of water is captured in paintings and sculptures by American and European Impressionists, Post-Impressionists, Cubists, Expressionists, Surrealists and contemporary artists - from Pierre Bonnard to Maximilien Luce.

ANDY WARHOL SHOWS (June 18-Sept. 12)
Eric Firestone Gallery in East Hampton, 631-604-2386, ericfirestonegallery.com; Brooklyn Museum, 718-638-5000, brooklynmuseum.org

"Warhol: Dylan to Duchamp," at the Firestone, focuses on 100 photos shot during Warhol's filming of "Lonesome Cowboys" in 1968. In Brooklyn, "Andy Warhol: The Last Decade" endeavors to capture the renewed spirit of experimentation near the end of the artist's life - from collaborations with Keith Haring and Jean-Michel Basquiat to variations on da Vinci's "The Last Supper" at the time of Warhol's death in 1987.

And keep in mind these other masterful exhibits 

The 54th Long Island Artists Exhibition (June 6-July 3)
Jeanie Tengelsen Gallery, 107 E. Deer Park Ave., Dix Hills,  631-462-5400, artleagueli.org

The Art League of Long Island's annual show and competition features 46 artists selected by Heidi Lange, director of Manhattan's DC Moore Gallery. For 50 years, the exhibit was held at the Heckscher Museum, but is now in the bi-level atrium-style art league gallery. There's a reception June 11 for the winning artists Rosemarie Furia, Judie Marcus and Shain Bard, and five honorable mentions. 

Site Specifics '10 (June 5-July 25)
Islip Art Museum. Carriage House and Islip Art Museum, 50 Irish Lane, East Islip, 631-224-5402, islipartmuseum.org

Celebrating the opening season of the landmark Carriage House at Islip's Brentwood Hall, seven artists have been assigned a room for a site-specific installation. The show is curated by Karen Shaw for the 

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Mercedes Matter: Retrospective (June 19-July 25)
Guild Hall, East Hampton, 631-324-0806, guildhall.org

Matter, an original member of the American Abstract Artists group and founder of the New York Studio School, is represented in this retrospective of her paintings and drawings, plus letters and photographs documenting that she was a key figure in the vibrant New York art scene in the 1940s and '50s. She died in 2001. 

Rackstraw Downes: Onsite Paintings (June 20-Aug. 8)
Parrish Art Museum, Southampton, 631-283-2118, parrishart.org

The artist who divides his time between New York and Texas, gets a retrospective of his exterior and interior panoramas - urbanscapes juxtaposed with landscapes - in 32 paintings executed across a stretch of more than 1,000 miles and 35 years. 

The Geometry of Kandinsky and Malevich (July 9-Sept. 7)
Guggenheim Museum, 1071 Fifth Ave., Manhattan, 212-423-3500, guggenheim.org

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Russian artists Vasily Kandinsky and Kazimir Malevich, both considered pioneers in abstraction, worked in the universal realm of geometric expression. But despite surface similarities, their careers evolved separately. Focusing on eight paintings, the exhibit draws attention to each artist's distinctive use of geometry as an ordering force. 

Barbara Kruger (Aug. 14-Oct. 11)
Guild Hall, East Hampton, 631-324-0806, guildhall.org

In keeping with its tradition of exhibiting East End artists, Guild Hall will devote all its gallery space to Kruger, who will create a site-specific installation, plus a video installation to go along with a selection of her paintings and prints. 

Botero: Paintings and Sculptures (Through June 22)
Vered Gallery, 68 Park Place East Hampton, 631-324-3303, veredart.com

The Vered mounts its first-ever solo exhibition of Fernando Botero, the still-hot Colombian figurative artist known for his proportionally exaggerated "fat figures" - both paintings and sculptures. 

Heat Waves in a Swamp: The Paintings of Charles Burchfield (June 24-Oct. 17)
Whitney Museum of American Art, 945 Madison Ave., Manhattan, 212-570-3600, whitney.org

A visionary artist from Niagara Falls, Burchfield, who died in 1967, tended to focus on the ground beneath his feet - his garden, for instance, or views from his window - rather than wonders of nature. The highly expressionist light in his paintings applies a mystical effect to his everyday scenes. 

ArtHamptons (July 8-11)
Sayre Park, Bridgehampton, 800-211-0640, arthamptons.com

The third annual international art fair inspired by the Hamptons history of attracting artists and collectors. New location designed to handle the expected bigger crowds. Bring your credit card or just browse. 

Tutankhamun and the Golden Age of the Pharaohs (Through Jan. 2, 2011)
Discovery Times Square Exposition, 226 W. 44th St., Manhattan, 866-987-9692, discoverytsx.com

King Tut is back, in case you hadn't heard. Hours have been extended to handle the crowds. Doors open at 9:30 a.m. weekends at Tut's temporary digs.