Last term's beaten finalists bounced back from a defeat in their opening fixture of the new campaign with a comfortable win in their first regular season game at their home arena since March.
Duncan Robinson equalled an NBA Christmas record with seven three-pointers. He hit four in the first quarter and added two more in the second as the hosts raced out to a 23-point lead.
New Orleans fought back to within six points in the fourth quarter, but Miami rallied to close out the victory.
Zion Williamson, the number one pick in the 2019 draft, scored 32 points and grabbed 14 rebounds in his maiden Christmas Day appearance but it was not enough to prevent the Pelicans suffering a first loss of the campaign.
Milwaukee narrowly lost to the Boston Celtics in their season-opener but responded with an impressive display in their home opener.
Steph Curry had 19 points for Golden State, which moved him up to second in the franchise's all-time scoring list.
Rookie James Wiseman added 17 points but the Warriors suffered a second successive heavy defeat to start their campaign.