•
June 28: The
2012 NBA draft took place at
Prudential Center in
Newark, New Jersey. •
July 11: In an utmost to bolster the roster, the Heat signed NBA veterans
Rashard Lewis and
Ray Allen, the NBA's all-time leader in three-pointers made at the time. •
October 30: The Heat opened the season with a 120–107 home victory over the
Boston Celtics. The previous year's players received their championship rings and the team raised their 2nd championship banner into the
American Airlines Arena rafters. •
November 3:
LeBron James was honored before the game when the team raised a banner for his Olympic achievement. He is the fourth player in Heat history to win a gold medal, joining
Dwyane Wade,
Tim Hardaway and
Alonzo Mourning. •
November 21:
Udonis Haslem surpassed Alonzo Mourning in all-time rebounding for the Miami Heat and became the first undrafted player in NBA history to lead a franchise in rebounding. Adding to this accomplishment, Haslem has now starred in the most Miami Heat games played, one more than fellow captain Dwyane Wade. •
November 24:
Chris Bosh surpassed the 13,000-point plateau. •
December 15: For the first time in franchise history, all 13 active players scored at least three points and converted one made field goal. •
December 25:
Mike Miller surpassed the 10,000-point plateau. •
January 5:
Terrel Harris was released. •
January 7:
Josh Harrellson was released. •
January 8:
Jarvis Varnado signed to a ten-day contract after being released from the
Boston Celtics. •
January 10: The last time the Heat lost consecutive games. Throughout the rest of the regular season and the playoffs, they never had a losing streak over 1 game. •
January 16:
LeBron James became the youngest player in NBA history to score 20,000 points.
LeBron James also surpassed the 5,000-assist plateau. •
January 20:
Chris Andersen signed to a ten-day contract. •
January 30:
Chris Andersen signed to a second ten-day contract. •
February 3: The Heat defeated the
Toronto Raptors on Super Bowl Sunday to start what would become the longest winning streak in the franchise and second in NBA history in a single season. •
February 8:
Chris Andersen signed for the remainder of the season. •
February 12:
LeBron James became the only player in NBA history to post 30+ points and shoot over 60% for six consecutive games. •
February 12: The Heat win their 1000th game in team history. They became the ninth fastest franchise to do so, posting a 1000-969 (.508) record on this date. •
February 23:
Dwyane Wade surpassed the 16,000-point plateau. •
March 2:
Juwan Howard signed a 10-day contract, re-joining the Heat. •
March 4: The Heat beat the
Minnesota Timberwolves 97–81 to extend their winning streak to a franchise-record 15 wins in a row, improving their record to 44–14. •
March 8: The Heat beat the
Philadelphia 76ers 102–93, becoming the first team in the league to clinch a playoff berth and extending their winning streak to 17. They also marked their best record through 60 games in franchise history at 46–14. •
March 10: For the first time in franchise history, the Heat beat every single team in the NBA with their victory against the Indiana Pacers. Miami was able to defeat all 29 opponents by their 61st game. •
March 12:
Juwan Howard signed to a second 10-day contract. •
March 18: The Heat came back from a 17-point deficit to defeat the
Boston Celtics 105–103 by
LeBron James game winning shot over
Brandon Bass to clinch the Southeast Division for the third consecutive year and extend their winning streak to 23 games, the second longest in NBA history. •
March 20: The Heat overcame a league high 27-point third-quarter deficit to defeat the
Cleveland Cavaliers 98–95 to extend their winning streak to 24 games. •
March 22: The Heat overcame an 11-point deficit to defeat the
Detroit Pistons 103–89 to extend their winning streak to 25 games. This is the third consecutive game in which the Heat came back from double digit deficits, the fifth during the streak, and 11th of the season.
Juwan Howard signed for the remainder of the season. •
March 24: The Heat overcame an 11-point deficit with Dwyane Wade inactive to defeat the
Charlotte Bobcats 109–77 to extend their winning streak to 26 games. This is the fourth consecutive game in which the Heat came back from double digit deficits, the 6th during the streak, and 12th of the season. •
March 25: The Heat defeated Orlando 108–94 to extend their winning streak to 27 games. •
March 27: The Heat fall 101–97 to the
Chicago Bulls, ending their winning streak at 27(Second longest winning streak in a season in NBA history). •
March 29: The Heat defeated the
New Orleans Hornets 108–89, clinching the best record in the Eastern Conference for the third time in franchise history. •
March 31: The Heat defeated the
San Antonio Spurs 88-86 without all-stars LeBron James and Dwyane Wade, along with Mario Chalmers, becoming the first team in NBA history to win at least 17 games in a calendar month. •
April 10: The Heat defeated the
Washington Wizards 103–98, clinching the best record in the NBA and home-court advantage throughout the playoffs for the first time in franchise history, and improving their record to 62–16 to set a franchise record for wins in a season. •
April 14: The Heat defeated the
Chicago Bulls 105–93, avenging the March 27 loss and winning their 36th game at home, the most in franchise history. •
April 15: The 16th back-to-back game night. The Heat earned a 15–1 record (.938) on the second night of a back-to-back set this season, tying Dallas (2006–07) for the best record on the second night of a back-to-back set in NBA history. •
April 17: The Heat concluded the regular season with a 105–93 victory over the
Orlando Magic. They finished the season with a record of 66–16, going 37–4 at home and 29–12 on the road. •
April 28: The Heat defeated the
Milwaukee Bucks in Game 4 of the Eastern Conference First Round, advancing to the Conference Semi-Finals. •
May 15: The Heat defeated the
Chicago Bulls in Game 5 of the Eastern Conference Semi-Finals, advancing to the Conference Finals. •
June 3: The Heat defeated the
Indiana Pacers in Game 7 of the Eastern Conference Finals, advancing to the NBA Finals for a third consecutive season, making them the first Eastern Conference team to accomplish this since the Chicago Bulls (1996–1998). Dwyane Wade also snapped a 12-game streak where he scored less than 20 points. •
June 18: The Heat came back from a 13-point deficit in the 4th quarter to defeat the
San Antonio Spurs in Game 6 of the NBA Finals, with LeBron James scoring 18 points in the period and Ray Allen hitting a
3 to tie the game with 5 seconds left in regulation. •
June 20: The Heat defeated the San Antonio Spurs in the NBA Finals to repeat as NBA Champions. ==Draft picks==