Part of planning your trip to Mexico will involve deciding what you need to take with you. A bit of thought beforehand about what clothing will be most appropriate for the destination, time of year, and activities you have planned will allow you to enjoy your trip without the discomfort of being inappropriately attired.
Mexicans may dress more formally, and in some cases, more modestly than people north of the border may be accustomed. Of course, you're free to dress as you wish, but if you choose to dress very differently from the majority of people you will be singling yourself out as a tourist, and worse, you may be seen as being disrespectful to your host country.
Here are a few general guidelines about what to wear depending on your destination, the type of activities you plan to participate in, and the weather.
Depending on Your Destination
In Mexico City and in Mexico's colonial cities, people generally dress more modestly than in beach destinations. Women in Mexico's interior destinations seldom wear shorts, and men almost never do. Women who don't want to attract excessive attention from men would be well advised to avoid short skirts and shorts and revealing clothes in general. Lightweight pants and long skirts are good options, as are blouses and tops that cover your cleavage. Sleeveless tops are acceptable, tank tops less so.
For beach cities and towns, casual clothes and shorts and tank tops are generally acceptable on the street. If you're going to the beach or pool, take something to cover up on your way there and back—wearing swimsuits away from the beach or pool is considered inappropriate.
For restaurants or nightclubs, you should dress a bit more formally. Some restaurants require men to wear long pants and closed shoes. The old adage "Men, wear pants. Women, look beautiful." still applies in some establishments. For men, guayaberas are generally a good option—you'll be cool and will be dressed appropriately even for formal occasions.
Depending on Your Activities
If you're visiting churches, short shorts, short skirts, and tank tops are frowned on, but Bermuda type shorts and t-shirts are generally fine.
For visiting archaeological sites, comfort is key. Wear comfortable walking shoes. A closed toe is best for climbing pyramids and walking on sometimes treacherous surfaces. Although the weather may be hot, it's best to cover up to avoid excessive sun exposure.
Adventure activities: Of course it will depend on the type of adventure you have planned. For zip-lining, wear shoes that attach firmly to your feet so you don't risk losing them. Shorts that are long enough so that the harness does not chafe your skin is a good idea. If you have a white water rafting adventure planned, water shoes are the best, and quick drying clothes. You may want to wear a bathing suit under your clothes.
Check the Weather
A lot of people assume that the weather in Mexico is always hot, but that's not the case. Be sure to check the forecast for your destination before you leave so that you will be well prepared with a sweater or jacket and or a raincoat if necessary. In southern Mexico, rainy season usually falls from spring through early fall.