The best time to visit Portobelo is during the dry season, which runs from December to April.During these months, you'll experience consistently sunny weather and lower humidity, making it ideal for exploring the historic ruins and enjoying the coastal activities. The sea is typically calmer, which is superb for snorkelling, diving, or taking boat trips to nearby islands.For those interested in cultural events, January brings the Festival of the Black Christ (Festival del Cristo Negro), a significant religious celebration that draws many visitors. While it's a great experience, be aware that accommodation can be booked up well in advance during this period, and the town will be much busier.The shoulder months of November and May can also be good options.