Make sure to bring sunscreen, water and an umbrella during the summer months. If you happen to have a fourth-grader (or homeschool equivalent), visit https://everykidinapark.gov/. Fourth-grade students in the US are eligible to receive a pass for free admission (for them and their families) to all US National Parks. The Castillo de San Marcos is included in this list.
St. Augustine is sunny and hot nearly year-round. Rain is always a possibility, especially during the summer months. If you visit during the cooler months, dress in layers. Temperatures can shoot up 20 degrees Fahrenheit or more by lunchtime. The Castillo de San Marcos is only wheelchair/stroller accessible on the lower level. But bring the stroller anyway for the walk down St. George Street.
It’s always a good idea to avoid being outdoors in the Florida summer heat between about 12-2 p.m.
July and August are the hottest months, but St. Augustine is tourist-friendly all year long. Visitation is lowest in the fall and highest in the summer.
Adult admission is $10 and children age 15 and under are free. Your admission is valid for seven consecutive days.