Best Time to Visit San Diego
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One of the best things about San Diego is that it's revered for having nearly perfect weather year-round. The average temperature on any given day is 70.5 degrees, which means that whether people visit around Christmas or the Fourth of July, they're pretty much going to experience pleasant weather.
The water is warmest off the coast of San Diego during the spring and summer. So, for surfers and swimmers, March through September is the best time to go. However, one of the perks of going during the off-season (October to February) is that the attractions and beaches tend to empty out. This means that if you visit during the winter, you could have the stunning shores all to yourself.