The average fire captain salary at Napa was $331,126 , which is 14 percent higher than the average salary for this job in California, and 67 percent higher than the national average for this job . Fire Captain salaries at Napa typically range from $318,080 to $353,263 (25th to 75th percentile). The highest reported fire captain salary was $413,752. There are 20 employees at Napa with the job title fire captain.