Clothing/Shoes/Weather Gear One year, when I visited in early fall, I was ill prepared for the 98 degree heat wave. When I first visited in July, 1990, I was ill prepared for how cold summer in San Francisco could be. Lesson learned: bring a little bit of everything -- t-shirts, sweaters, sweatshirts, light jacket, etc. It's also a good idea to layer, as the temperature can change drastically from morning when the fog has yet to lift, to midday, usually the warmest part of the day, to late afternoon and evening, when the fog in many areas of the city rolls back in.
Luggage and bags Depending on where you are staying, there are many hills in San Francisco. Thus, for luggage, make sure you can adequately transport it without being tired from walking all over the hills to get to your hotel. Or, one can just take a cab or public transportation.
Clothing/Shoes/Weather Gear Too many tourists come to San Francisco wearing and packing only T shirts and shorts. That is a big mistake, as San Francisco weather is on average, much colder than most cities in the summer. Whichever season you come to SF, make sure you bring a jacket and clothes for layering (T shirt, long sleeve over, a sweater when it's winter time, and a jacket). Also check the forecast for rain. The fall tends to be the best season weather-wise for San Francisco (especially mid-to-late October when we have an Indian Summer). As for shoes, wear comfortable shoes, as there are many, many hills.
Camping/Beach/Outdoor Gear Unfortunately, almost all of the San Francisco beaches are too cold to sunbathe or swim in. Thus, only bring swim suits/trunks if you have access to a pool... This is true in the summer as well.
Clothing/Shoes/Weather Gear We were in San Francisco in the fall, which is probably the best time to go. I found the weather varied from 80 degrees to 58, depending on the location, time of day, rain or fog. So bring stuff that can be layered. Oh, and an umbrella! If it's cold and foggy in the city, as soon as you cross the bridge to Marin County, it can be immediately hot and sunny.
Clothing/Shoes/Weather Gear Mark Twain once said, 'The coldest winter I ever spent was a summer in San Francisco.' Summers in the City can be very foggy and windy. It's not unusual to see people wearing ski parkas in Fisherman's Wharf after the fog rolls in.
Also, the weather can be different depending on what neighborhood you are in. Be prepared for anything, dress in layers: water-resistent windbreaker, sweatshirt with hood, shirt and undershirt. (Use your daypack as a closet, not for storing valuables.)
And wear long pants & comfortable shoes. In this City, only tourists wear shorts.
Clothing/Shoes/Weather Gear San Francisco is generally NOT hot in the summer. There is often fog, which can burn off in the middle of the day. Bring a sweater or light jacket that you can remove as the day goes on. Locals don't wear shorts in the City too often (unless they are exercising).
Clothing/Shoes/Weather Gear You never know quite what to expect with regards to weather in various parts of San Francisco. I have worn a tank-top and been fine and then had to throw on a sweater and jacket just a few hours later. Also, the East Bay (Berkeley, Oakland, etc) tends to be a lot warmer than in San Francisco, which is good to keep in mind.
Photo Equipment Brings lots of film, or a large memory card and battery charger, since you will find many beautiful spots throughout the Bay Area.
Clothing/Shoes/Weather Gear Make sure you pack a fleece or a cardigan as it often starts out bright and sunny but gets chiller in the afternoons/evening. Also if you are planning on going on the cable cars they can be a bit chilly!
Clothing/Shoes/Weather Gear Bring layers if you're going to San Fran-- all times of the year. Mark Twain once said "the coldest winter I ever spent was a summer in San Fransisco." And he wasn't kidding. Although it can get very warm in the sun, when that fog starts rolling in, I've seen the temperature drop 20 degress in a few hours.
Clothing/Shoes/Weather Gear For most any time of year, pack layers when going to SF. The summer can bring cold OR hot weather. If days are hot, typically nights cool off very quickly and light jackets are in order.
In the winter, it can be cold and rainy one day and moderate and humid the next. so...Be prepared is the best advice.
Photo Equipment Anything available...SF is very picturesque
Luggage and bags Whatever you'd generally use.
Clothing/Shoes/Weather Gear Bring layers of clothes, and don't forget windbreakers and/or pullovers. Especially if you're visiting in the Summer. This is not Southern California, and San Francisco can be downright chilly in the Summertime. Spring and Autumn are the best time of year for warm weather.
Luggage and bags Something to keep warm a sweater you can carry. A sweatshirt you can take off.
Clothing/Shoes/Weather Gear Good shoes are always welcome when on holiday.
Photo Equipment Two batterys one to use one on charge.
Everyready to change one when it's done.
You don't wish to miss that picture.
Clothing/Shoes/Weather Gear Take warm clothes, even in the summer. You'll definitely need a jacket at night, and even during most summer days. The average high temperature in July in San Francisco is 18 Celsius (65 Fahrenheit), and there is often a stiff breeze.