
Peak Season: June to September In a city where weather is key, the sunny days with mellow sea breezes make this time of year the most popular. Attractions are packed and hotels expensive, especially on weekends.
Off Season: November to April Foggy, rainy and cold (temperatures in the 50s), but there are fewer crowds and better deals on hotels; be aware that air travel can sometimes get delayed during this time due to visibility.
Sweet Spot: May; October If the weather is kind you can score pleasant days with few crowds. On the other hand, you can be faced with rainstorms, so make sure your plans are flexible.