Not a bad idea to be prepared but paying attention to weather forecast around here that is more than 12 hours out is futile. Besides, the forecast through the weekend shows 30% chance of rain every day. In reality there is never less than a 30% chance of rain in SoWal in July. And when we do get showers they are usually in the afternoon, brief, and welcome.
Check out Fired UP in Seaside for a great time indoors. The public library off Hwy 331 is very nice. Rent movies at Movies By The Sea by Publix in WaterColor Crossing on Hwy 395 just a mile north of Scenic 30A. You can also pick up a pizza next door at Pizza By The Sea.