This paper presents StreetReaderAI, the first accessible Street View tool for the visually impaired. It combines contextual awareness, multimodal AI, accessible navigation controls, and interactive voice to address the accessibility challenges of existing tools like Google Street View (GSV). StreetReaderAI allows visually impaired users to virtually navigate destinations, explore vast environments, and virtually travel across GSV's 220 billion imagery and 100+ countries. Iteratively designed with a mixed-vision team, it has been evaluated with 11 visually impaired users to demonstrate its value in assisting with POI surveys and remote route planning.