Yes, you can be married in Church but not have the nuptial Mass. Yes, you can have a nuptial Mass with communion but not receive. And finally, yes, for Catholics it must be in a Church (the priest or in some cases even the bishop must dispense if, for example, the bride or groomās father is a Protestant pastor and the couple wish him to marry them in that Protestant Church instead of the in Catholic Church building, but even there it has to be in a church. No beach weddings. However, the beach can be the reception area. If it would even be wanted.
It SOUNDS mighty romantic and āspiritualā to have a beach wedding but like all outdoor events everybody pictures the temperature at a perfect 70 degrees, not a breath of wind, not a cloud, mosquito, bug, or ācritterā around, absolutely no āaccidentsā such as the bride tripping into the surf in full wedding dress, no children running into the water, no sudden waves soaking the party before the wedding even begins, nobody getting ill from too much sun, no sunburns, no food-bourne illness from the food being out in the heat, no NOISE, etc. etc. The reality of most outdoor weddings is so very different! Give me a nice, quiet, clean, āunbuggyā, Church where the bathrooms are right downstairs if needed, nobody is going to get soaked, sunburned, or ādive bombedā by seagulls, etc . .