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Portsmouth
City in New Hampshire, United States
Overview
Portsmouth, New Hampshire, is a charming historic seaport known for its cobblestone streets, lively culture, and picturesque harbor views. This small city offers a blend of colonial architecture, busy dining scenes, and outdoor recreation, all within a walkable downtown.
Geographic Context
Jurisdiction
United States
State
New Hampshire
Population
17,871
Time Zone
America/New_York
Coordinates
43.08°, -70.76°
Key Metrics
Safety Score · estimate
86
Female Safety
85
LGBTQ+ Safety
80
Traffic Safety
80
Food Safety
97
Monthly Cost · estimate
$4,450
Local Cost
$2,410
Local Income
$4,400
Cashless
92
English
100
Temperature
9.3°C
Summer Avg
19.1°C
Winter Avg
-0.4°C
Record High
30.4°C
Record Low
-19.7°C
Humidity
83%
Precipitation
1333 mm
Internet Speed
196 Mbps
Upload
40 Mbps
Latency
14 ms
City Vibrancy
56
Coworking
0
Cafes
19
Nightlife
16
Parks
21
Transport
0
Walk Score
0
Footways
—
Airport
PSM
Distance
5 km
Explore
Data sources
Source-backed data
World Air Quality Index - Latest available city-level air quality station measurement. Record updated 2025-12-05.
OpenStreetMap - Nearby amenities counted from OpenStreetMap-derived city extracts. Record updated 2025-12-06.
OpenStreetMap transport extract - Walkability, footway density, and airport access metrics derived from mapped transport features. Record updated 2025-12-05.
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
Oyster List city price estimates - Price origins are unverified. Available generation methods include AI estimates; stored records do not identify a survey, observation period, or model for each price. Record updated 2026-01-14.
Oyster List AI-assisted estimates - Safety, lifestyle, income, and practical scores include model-assisted estimates. Stored records do not identify supporting observations for each score. Model-reported confidence: 80/100; this is not a measured accuracy score. Model: derived+gpt-4.1. Record updated 2026-03-26.
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