Situated on the coast of Southern California, San Diego is the second largest city in the state. A haven for beach-lovers and a hotspot for surfers, it's also well known for its beautiful zoo and border crossing - the largest land border crossing in the world - with Tijuana, Mexico. For travellers, it's an ideal vacation destination with great weather nearly all year round. But San Diego is also a working city, with a busy downtown surrounded by a collection of diverse neighbourhoods.
No matter when you visit San Diego, you can expect mild temperatures around 24°C, though May and June can be surprisingly gray and cool. September is often the warmest month. But, make sure you always pack layers any time of the year you visit, as California is notorious for its "micro-climates" - small geographic areas where the temperatures can range wildly. Temperatures will also tend to be warmer in the valleys and away from the coast, and cooler closer to the ocean.
A car is virtually a necessity in San Diego, unless you aren’t planning on doing much exploring. Biking is popular in beach communities and within each neighbourhood, but difficult for longer distances. There is a light rail system that serves the Old Town and downtown area, where the nicest ocean-view hostels in San Diego can be found, but if you plan to venture farther - and you should - you'll need your own transport.
In addition to checking out the city's many beaches, spending a day at the zoo or Sea World, strolling the gardens in Balboa Park, or exploring the coves and cliffs of La Jolla, San Diego offers great family-friendly activities including hiking, biking, surfing, whale watching, golfing and sailing.