1. Don't Drive In The Rain.
It doesn't rain often in California, in fact, you could stay there for months without seeing a drop! This lack of rain means that the road surfaces build up a residue of grease, oil, exhaust emissions, and other fluids.
When it finally does rain, this grease layer turns the roads into a dangerously slippery surface that is best to avoid.
If you have to drive, wait until it rains enough to wash away this greasy layer away, or even better, wait until it stops raining, because, for some strange reason, no matter which country you are in, when it starts to rain all the idiot drivers get into their cars.

2. Don't Drink The Tap Water.
Although California is a large state with over 7000 public water systems, only 4000 are regulated by the Division of Drinking Water and at least 300 of those that aren't, are out of compliance with basic drinking water standards.
We aren't going to list those 300 so you can avoid them, because, to be honest, it'd bore you and you probably wouldn't remember them anyway so, to cut a long story short, Don't Drink The Tap Water!

3. Don't Diss In-and-Out.
The fast-food chain "In-and-Out" started in California over 70 years ago and until fairly recently was exclusive to the state making it somewhat of an institution.
On the face of it, it may seem like just another burger joint offering the same old products cooked in the same old way and with way fewer options than its competitors, but it's probably best not to say this whilst you're in California!
or standing next to a Californian!
or on a video that a Californian may watch.
But although In and Out may seem just like the rest, things aren't always what they seem.
In and Out actually has a Secret Menu! (That's not really that secret because here it is

Burgers with lettuce for buns, burgers with 4 patties and 4 times the cheese, chili burgers, animal-style fries, and mustard grilled patties, not only is their menu more interesting than their rivals, but their burgers are larger, tastier, fresher, and cheaper than most too!

4. Don't Rely On It Being Warm.
As we said before, California is huge, so big in fact that it doesn't have the same climate everywhere within the state.
While places like L.A may have a Mediterranean climate, the Mojave Desert and Death Valley have a desert-like climate, and further north in South Lake Tahoe the temperature can drop to -10C in winter and in summer never rise above 30C.
This is also true about the temperature of the sea. Whereas in summer in Santa Monica the average sea temperature is a "fresh but manageable" 21c, further north in Mendocino it won't climb above a "freeze your nuts off" 11c!
Check the weather for where you plan to travel and pack accordingly, wearing shorts in Malibu may be fine, but in San Francisco, they scream tourist!

5. Don't Support The Wrong Teams.
In Spain, walking around Barcelona wearing a Real Madrid shirt will probably get you into a bit of trouble, this is something that seems to happen almost everywhere in the world, so if you do have to wear sports merchandise, make sure you're wearing the right team!
Before you leave, learn which teams are from the area and who their rivals are, this way if you're planning on visiting Oracle Park or watching a San Francisco Giants game you'll know it's best not to do it in a Dodgers shirt.

6. Don't Think California Is just L.A. And San Francisco.
A thing you need to know about "Cali" is that it's not just made up of L.A. or "Frisco" as we see in the movies. (Also never call California "Cali" or San Francisco "Frisco" or "San Fran").
California has National Parks, Beaches, Vineyards, Snow-capped Mountains, Deserts, and Redwood forests. Don't just limit your stay to just the typical major cities or you'll be missing out on the genuine California.

Do You Know Anything To Avoid In California?

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