The Lakers will get Kent Bazemore and MarShon Brooks from the Warriors, the team said in a news release.
"Mixed emotions, really," Blake said after changing into street clothes and exiting the arena less than an hour before tip-off of Wednesday night's game against the Houston Rockets after being informed of the trade. "I knew it could happen but didn't expect it to happen, all at the same time."
Blake's $4 million salary will be absorbed by Golden State's trade exception created when the Warriors dealt Brandon Rush to the Utah Jazz last July. Brooks and Bazemore combine to make $2 million, meaning the trade will save the Lakers $4 million in salary and luxury tax implications.
Lakers sources told ESPN.com's Ramona Shelburne there is a strong chance power forward Jordan Hill is also moved before Thursday's trade deadline, with the Brooklyn Nets, New Orleans Pelicans, Charlotte Bobcats, Dallas Mavericks, Phoenix Suns and Atlanta Hawks having registered interest in him.
"The hardest thing is really for my family, really," Blake said. "I got a wife, three little kids and now I'm going to have to spend four months, probably, away from them and so that's going to be the hardest part."
Blake called the 31-22 Warriors a "really, really good team" but was unsure what his role would be.
"The acquisition of Steve Blake will provide us with additional veteran depth at point guard as we enter the stretch run of the season," Warriors general manager Bob Myers said in a statement. "He's had a productive career and is a player who can both run an offense and has the ability to shoot the basketball. On the other hand, we thank Kent and MarShon for their contributions to our team both on and off the court and wish them success as they enter the next stage of their careers."
Blake, who signed with the Lakers in the summer of 2010 while the team geared up for a potential threepeat, will become an unrestricted free agent this summer and said he would consider returning to the Lakers on a new deal.
"Absolutely," Blake said. "I've loved my time here. When you spend [time] in some place this long, you start to get comfortable. We loved where we lived, loved the schools my kids were in and always loved the support of the fans and ownership and everybody. So, it's one of the best places I've ever played at and if in the future they wanted me back, I would absolutely, definitely consider it."
Blake said he was given no indication when he arrived at the arena or at shootaround that he would be traded.
"I was in my warm-ups, my uniform. I was ready to go," said Blake, who was told the news in coach Mike D'Antoni's office about 75 minutes before the game. "It's a tough situation but it is what it is and I'm ready to start something new."
The Warriors mark the seventh team Blake will play for in his 11-year career after coming into the league as a second-round draft pick by Washington in 2003.