In 1609, Powhatan recognized that his base of operations at Werowcomoco was too exposed to the English. Werowcomoco was on the shoreline of the York River at modern-day Putan Bay, and the English could sail or row barges directly to it.
Powhatan moved inland two years after the English settled at Jamestown, to avoid threats from foreign enemies. This is comparable to the reason why the English located their capital at Jamestown rather than Cape Charles or the modern location of Norfolk, and why the rebelling Virginians moved their capital from Williamsburg to Richmond in 1780.
Here's how John Smith described Powhatan's move:1
According to Helen Rountree,1 Orapakes was just a temporary capital. It was in a swamp at the head of the Chickahominy River, near the modern-day interchange of I-64 and I-295 (perhaps the archeological site in New Kent County labelled 44NK100). The location lacked the broad, flat river-bottoms where the Algonquians planted corn; was not easily accessible by canoe; and was located at the edge of his territory. Orapakes was more distant from the English than Werowocomoco, but it was too close to the rival Monacans for comfort.
Powhatan lived at Orapakes for at least two years after he moved there in 1609. Sometime between 1611 and 1614, he moved further north to Matchut, near where his brother Opechancanough ruled at Youghtanund.