When deciding on the time for your ceremony, please, check with any weather website for the exact sunset time. You want to have enough sunlight for your photo shooting.
Remember this is a humid climate and you might want to use waterproof makeup and mascara. If your hair is prone to frizz bring along anti-frizz products.
White underwear t-shirt and a handkerchief or small towel is recommended for the groom if he normally sweats.
When deciding on a wedding dress and brides maids dresses consider choosing informal dresses or sundresses in light fabrics such as organza or chiffon. Even with the cooler temps of the winter, Mexico is still very hot to guests unaccustomed to the heat. Lightweight linen suits are popular for the guys.
Please keep in mind that you will be packing these dresses/suits in your suitcase, so you might want to have your drycleaner pack it for you and/or pack a travel iron or steamer.
A sewing kit for any mishaps can come handy.
Watch out for tan lines; use a bathing suit according to your wedding gown.
Consider the beach is normally windy if you are going to wear your hair down, you would like to show the happiness on your face at all times.
For artistic purposes you might want to match your bouquet with your makeup.
Please ask your guests to be careful when they take pictures, since sometimes they stand on the photographer´s view.
Use waterproof mascara and makeup.
You might want to use a nude or light color bikini under your dress.
Bring along some towels.
Consider using flip flops, crocs, or similar.
If you use contact lenses, bring your eye drops.