Weather in Portsmouth in August
Portsmouth, United States averages a high of 29.4°C (84.9°F) and low of 21.8°C (71.2°F) in August, with 12 rain days and 10.9 hours of daily sunshine. Travel score: 79.4/100 (Good). The best time to visit Portsmouth is May.
High
29°C85°F
Low
22°C71°F
🌧️
12
rain days
☀️
10.9
hrs/day sunshine
💧
77%
humidity
79— Good
August in Portsmouth is hot and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Portsmouth?
How much does it rain in Portsmouth in August?
Portsmouth receives an average of 112mm of rainfall across 12 rainy days in August. The annual total is 1149.2mm.
What should I pack for Portsmouth in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 29°C
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (12 days)
☔
Umbrella
Be prepared for occasional showers
🎉Visiting United States in August?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31