San Diego, United States

• San Diego sits on the coast of Southern California, just north of the Mexican border, and it's a collection of separate neighborhoods more than one city center. Downtown has the Gaslamp Quarter and Little Italy, North Park is inland and more local, and the beach communities (Ocean Beach, Pacific Beach, La Jolla) run up the coast, with Coronado on its own island across the bay. Violent crime against visitors is uncommon, and it's one of the easier large US cities for a woman traveling alone.
• Most problems are the ordinary big-city kind: car break-ins at beach lots and trailheads, phones and bags left unattended, drunk crowds around nightlife districts after about 10 PM, and homelessness and street drug use in parts of downtown. Rip currents are the most serious physical hazard at the beaches, so swim near a lifeguard tower and pay attention to the flags.
• Eating or drinking alone is normal. Coffee shops, brewery taprooms, food halls and bar seating all work fine solo, and hostels, surf lessons, walking tours and kayak outings are easy places to meet other travelers.
• The city is spread out and built around cars, but downtown, Little Italy, Balboa Park and the Coronado ferry are manageable without one. Getting to the beaches and North Park means rideshare, buses or the trolley. Don't leave anything visible in a parked rental car.

English is the main language, and Spanish is widely spoken across the city and near the border. Dial 911 for any emergency; operators can connect an interpreter for other languages. The San Diego Rape Crisis Hotline (888-385-4657) and the National Domestic Violence Hotline (1-800-799-7233) are free and answer around the clock.

• Dress is casual almost everywhere. Beachwear stays at the beach, so carry a cover-up or top for restaurants and shops. Upscale dining in La Jolla, Coronado and the Gaslamp calls for something a bit nicer.
• Tipping is expected: 18-22% in restaurants, $1-2 per drink at a bar, and 15-20% for rideshare and taxis. Menu prices don't include tax or tip.
• California law bans smoking and vaping in most public places, including beaches and many parks. Alcohol isn't allowed on beaches, piers or boardwalks, and open containers aren't allowed on the street.
• Small talk with strangers is common but optional. A firm no and walking away is acceptable, and bartenders and servers are generally used to helping guests who are uncomfortable.
• Rip currents and sneaker waves are a real risk. Swim only at lifeguarded beaches, and stay back from cliff edges and wet rocks at Sunset Cliffs and La Jolla Cove.

The first hour after landing is when you're tired, carrying everything, and easiest to take advantage of. Three things to sort before you fly:

• Your ride from the airport. A driver who meets you in arrivals, at a price fixed before you fly — no haggling at the taxi rank.

  Book an airport pickup

• Data the moment you land. Maps, ride apps and a way to call for help as soon as you switch your phone on. An eSIM installs at home.

  Get a good eSIM

• The emergency number. Emergency Services (Police, Fire, Medical): 911. Save it in your phone, not just on this page.

  All emergency contacts

• The MTS Trolley has three lines linking downtown with Old Town, Mission Valley, Santa Fe Depot, Petco Park and the San Ysidro border. Fares can be paid with the Pronto app or card, or by contactless payment at the station. After dark, wait in the lit, busy part of the platform and ride in a car with other passengers.
• Uber and Lyft are widely available and are the easiest option for the beach neighborhoods, La Jolla and late rides home. Check the license plate and driver name before getting in, and share your trip with someone.
• Downtown, Little Italy, Coronado and Balboa Park can all be covered on foot. The Coronado Ferry leaves from the downtown waterfront and is a cheap way to cross the bay. Amtrak's Pacific Surfliner and the Coaster commuter train run from Santa Fe Depot to Los Angeles and North County.
• With a rental car, never leave bags, phones or shopping visible inside. Break-ins at beach lots, trailheads and downtown garages are the most common crime affecting visitors. Electric scooters and bikes are everywhere, but sidewalks and bike lanes get crowded, so skip them after drinking or in the dark.
• If you're planning day trips outside the city, consider renting a car.

Explore San Diego with local guides and curated experiences.