Portsmouth is known for its pedestrian-friendly layout, making walking an excellent way to explore the city. The compact downtown area features well-maintained sidewalks and crosswalks, allowing for easy access to shops, restaurants, and cultural landmarks. The city’s infrastructure supports walkability, with a focus on pedestrian safety and accessibility. While the weather can vary, with cold winters and occasional snow, the temperate seasons are particularly enjoyable for walking. Distances between key attractions are generally short, making it convenient to navigate on foot without the need for additional transportation.

Biking can be a convenient way to get around thanks to Portsmouth’s growing network of bike paths and trails. The New Hampshire Seacoast Greenway, a developing route, connects Portsmouth to nearby coastal communities, offering a safe and scenic option for cyclists. Many areas in Portsmouth are accessible by bike, and the relatively compact layout of the city makes it manageable for short to moderate distances. However, riders should consider the terrain and weather conditions, as these can vary and impact biking comfort.

Portsmouth'taki toplu taşıma, Market Square ve yakındaki kasabalar gibi önemli bölgeleri birbirine bağlayan Wildcat Transit ve COAST gibi otobüs hizmetlerini içerir. Bu seçenekler, yerel hedeflere ve çevredeki bölgelere ulaşmak için kullanışlıdır; ancak sabit hat düzeni bazı yerlere erişimi sınırlayabilir. Portsmouth'un kompakt yapısı, kısa mesafelerde yürümeyi veya bisiklete binmeyi pratik kılar; ancak daha uzun mesafeler için toplu taşıma yararlı bir seçenek olabilir. Kar gibi mevsimsel hava koşulları, zaman zaman sefer saatlerini veya erişilebilirliği etkileyebilir.