Barometric Pressure in Portsmouth, United States 
1014.7 hPa
23.7 ℃
27%
1.84 m/s
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The average pressure in Portsmouth, Virginia, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
The daily total fluctuation in pressure in Portsmouth is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Portsmouth hour by hour across the next 6 hourly readings.
The barometric pressure in Portsmouth, Virginia, is influenced by its coastal location. It often fluctuates due to the proximity to the Atlantic Ocean. Changes in pressure can bring varying weather conditions.
Portsmouth is situated near the mouth of the Chesapeake Bay. The city's landscape is characterized by low-lying coastal plains. These flatlands allow winds to move freely, contributing to the instability of the atmospheric pressure.
The surrounding waters of the Atlantic Ocean and the Chesapeake Bay moderate temperatures in Portsmouth. They help regulate the air pressure, making it prone to slight changes. This unique combination of land and sea influences the weather patterns in the city.