This year adjective is maxi: maxi dress, maxi gown, maxi skirt.
I have always connected a maxi dress or maxi skirt to summer time more than other seasons because they give me an idea of lightness, freshness, of something colorful and radiance.
Aniye By: mint/turquoise bicolor maxi dress.
Armani Exchange: printed maxi dress.
Diane von Furstenberg: fleurette silk chiffon maxi dress.
Esprit: cotton maxi dress with smocked top and batik stripes
FCUK: Rio embroidered maxi dress.
Liu Jo: long denim dress with floral print.
Ted Baker: floral printed maxi dress.