Clay J.
Yelp
There are at least five places to get a cup of coffee on Daniel Island: Blondie's, The DIME, Starbucks, Refuel, and Circle K. Each coffee shop and/or gas station, has its own set of plusses and minuses. But from most of the coffee drinkers I speak to, Blondie's food and baked good and things-other-than-coffee stuff tops the list, but its coffee is not the best. That said, for On-Daniel-Island coffee, Blondie's is probably the best nexus between hours open, location, and companion food.
That said, if you read the reviews, there can be a bit of a service problem here. The staff is generally well meaning, but it gets busy. If you're in a rush, or are easily irritated by standing around waiting for coffee, do yourself a favor and use their online ordering system. Take a deep breath, enjoy your life and gain some perspective about the kind of life you lead where you get to go to coffee at a place like Blondie's, and then, when you are done reflecting, your coffee will be there waiting on you, and you will have saved yourself from having to stand-in line for what can be a rather long time sometimes.
They are very dog friendly. The courtyard usually has a dog bowl for water in it, and if it's not there or empty, just take it inside and get it filled up. That whole courtyard patio area they have is quite lovely and open year around.
If you're strictly looking for the *best coffee you can get* and are not looking for food to go with it, you can probably do better going to the DIME. If you're in a rush and want decent coffee quickly, drive across the street over to the Circle K. Yes, it's a gas station, but a lot of high end coffee drinkers here on DI swear it's the best coffee on the Island.
That said, if you're looking for a place to maybe have a cup of coffee with a friend, and maybe split a muffin or something, you can't go wrong with Blondie's. Just, for the love of god spare yourself from standing in line and use their website.