Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Cancun emerges as the optimal March destination with an overall TripTiming Index of 67/100 vs 62/100 for San Juan (+5 point advantage). Cancun captures optimal environmental comfort with 31°C daytime feels-like temperatures and 12% rain probability, compared to 30°C in San Juan. Visitors also enjoy vibrant neighborhood street life. While San Juan retains an edge in Space & Crowds (52/100 vs 41/100), Cancun's commanding performance in Weather Comfort secures the overall March recommendation.