Weather | 23–33°C (73–91°F), drier and slightly easier | 25–35°C (77–95°F), hotter afternoons | 28–40°C (82–104°F), the year's toughest heat |
Crowds | Moderate to high around Chinese New Year | Moderate; steady sightseeing traffic | High around Songkran and water-fight zones |
Atmosphere | Cooler evenings, busy Chinatown period | Sunny, bright, more rooftop-and-river energy | Party-heavy, splashy, and hectic |
Key events | Chinese New Year, Bangkok Design Week tail end | Makha Bucha, Thailand Tourism Festival, Book Fair | Songkran, SIAM Songkran, S2O |
Public holidays | No major nationwide closure pressure from the listed events | Makha Bucha on March 3 | Songkran public holidays: April 13–15 |
Budget | Slightly firmer than March in popular areas | Good shoulder-season value | Can spike sharply around Songkran |
Best for | Food trips, Chinatown, milder walks | Balanced city breaks, cruises, rooftops, early starts | Festival travelers and nightlife groups |
Book early? | Yes for Chinese New Year dining and Yaowarat hotels | Yes for sunset rooftops, cruises, and late-March event weekends | Yes, 4–6 weeks ahead for hotels and major activities |
Transport tips | AQI can be a factor; use BTS/MRT | Use BTS/MRT and river boats to avoid hot traffic jams | Carry waterproof protection and expect slow roads |