Remember the AM/FM radios of yesteryear? Times have changed and today's radios can include XM satellite radio.
The Eton E1 XM-Ready AM/FM Radio Satellite is a kind of portable radio that not only receives AM and FM, but also XM.
Of course you could get XM satellite radio online so that you can access the stations from your laptop or PC.
XM Radio Online is included as part of most XM Satellite subscriptions at no additional charge, so you can have a little satellite radio at the beach.