| Horsename: | Summerly |
| Sire: | Summer Squall |
| Grandsire: | Storm Bird |
| Dam: | Here I Go |
| Damsire: | Mr. Prospector |
| Sex: | Filly |
| Foaled: | 2002 |
| Country: | United States |
| Colour: | Chestnut |
| Breeder: | Thomas F. Van Meter & Michael Lowenbaum |
| Owner: | Winchell Thoroughbreds |
| Record: | 14: 6-1-2 |
| Earnings: | US$907,682 |
| Race: | Fair Grounds Oaks (2005) Kentucky Oaks (2005) Silverbulletday Stakes(2005) Ashado Stakes (2006) |
Summerly (March 31, 2002 – March 30, 2021) was an American Thoroughbred racehorse best known for winning the Grade 1 Kentucky Oaks in 2005.[1] She was sired by 1990 Preakness Stakes winner, Summer Squall and out of the Mr. Prospector mare, Here I Go.[2]
Summerly raced from age two through age four and was then retired. She was sold at the November 2006 Fasig-Tipton broodmare sale for $3.3 million to WinStar Farm of Versailles, Kentucky. In 2008 and again in 2009, Summerly produced a colt by Distorted Humor.[3] She produced a colt by Tiznow named State Line. She also had a filly by Kentucky Derby winner Super Saver. In 2018, she produced a filly by Carpe Diem.
Summerly died of colic on March 30, 2021, at the age of 19.[4]