Spokesman Nate Littlejohn says the people were rescued by another boat before a Coast Guard cutter arrived Saturday evening. The boaters were taken to Anacortes Marina.
No injuries were reported.
Littlejohn says the Coast Guard received a report about the fire about 5:15 p.m. Saturday. Coast Guard crews set up a security zone around the burning sailboat, Straight Up, and a company has been contracted to salvage it.
The cause of the fire was not known Saturday night.