With all the sunset photos taken around here, I am certain that my idea could not be original, and I guarantee you that I am neither slim, nor blonde.
Sunset or not, the daily photos show the life of the Beach, not too different from the seasons in the mountains. While not all sunsets are spectacular, the Beach does have a life filled with changes. The photos would show how the Beach moves around through the particals of sand. I think it would certainly be interesting to see the changes day to day. You could see spring break be totally opposite of the lull shortly thereafter. Memorial Day would roll around with big crowds, then Independence Day, etc. People from far away would be able to see the Beach's year round life.
Just an idea, which is yours to take, leave, or modify.