For a three-night trip with children, start with Holiday Inn Resort Vana Nava Hua Hin. Linked with the Vana Nava water park, it lets you spend a full day in the water worry-free thanks to December's clear, dry weather. Resorts like this often dress the grounds with trees and lights for the season, and the 27th-floor sky bar is an easy way to close out a family evening.
If you want a self-contained resort, compare Hyatt Regency Hua Hin and InterContinental Hua Hin Resort. Both have extensive grounds, multiple pools and a spa, which makes it easy to enjoy the festive mood fully on site even on a short break. The Hyatt also houses The Barai spa, convenient for a couple to fit in a spa session ahead of a Christmas Eve dinner.
For a balanced trip covering both children and grandparents, Hua Hin Marriott Resort & Spa and Amari Hua Hin are worth a look. Both sit on the central Hua Hin beachfront, making it easy to add the night market or Market Village's year-end mood, and the pool setups work fine for family days. For couples prioritising atmosphere and photos, The Standard Hua Hin is a more recently opened design hotel worth comparing.
For a longer stay with several generations under one roof, consider Centara Grand Beach Resort & Villas Hua Hin and Anantara Hua Hin Resort & Spa. Villa-style rooms and generous gardens suit grandparents, adult children and grandchildren sharing space over Christmas, and both sit easily with a golfing member of the group.
Around December 25, Hua Hin sits in the most pleasant stretch of Thailand's dry season, so rain rarely disrupts plans - but it is also the year's highest-rate period, and Bangkok weekend traffic adds to the usual crowd. Before booking, check occupancy by room type, breakfast and transfer inclusions, the free-cancellation deadline and any peak minimum-stay rule in the current product details, and book early if your dates and room type are available.