Barometric Pressure in Portsmouth, United Kingdom 
1029.7 hPa
19.9 ℃
61%
1.4 m/s
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The average pressure in Portsmouth, England, United Kingdom today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
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 is typically between 1013 and 1023 millibars. This is slightly above the national average. The pressure is often highest in the morning. It tends to drop during the day.
Portsmouth is a coastal city surrounded by the Solent Strait to the east and the English Channel to the south. The city is bordered by the South Downs hills to the north. The Solent Strait is a narrow body of water. It separates the Isle of Wight from the mainland.
The surrounding landscape affects the atmospheric pressure. The Solent Strait's narrowness creates a channeling effect on winds. This can cause pressure changes. The South Downs hills also influence local wind patterns. They can block or redirect winds, leading to pressure fluctuations.