Benchmarked strictly across TripTiming's 5 empirical pillars: Crowds, Weather, Vibes, Prices, and Safety.
Lisbon emerges as the optimal October destination with an overall TripTiming Index of 57/100 vs 42/100 for Porto (+15 point advantage). Lisbon captures optimal environmental comfort with 23°C daytime feels-like temperatures and 55% rain probability, compared to 20°C in Porto. This is reinforced by attractive lodging rates (~$235/night). While Porto retains an edge in Space & Crowds (61/100 vs 42/100), Lisbon's commanding performance in Weather Comfort secures the overall October recommendation.