Barometric Pressure in Portland, Australia 
1011.2 hPa
15.2 ℃
72%
5.42 m/s
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The average pressure in Portland, Victoria, Australia today is , which is lower than normal. Pressure is trending falling.
Weather prediction: Rain at frequent intervals
Rapid Pressure Changes
Rapid pressure changes detected in Portland, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
The daily total fluctuation in pressure in Portland is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Portland hour by hour across the next 6 hourly readings.
Portland has a cool, ocean-influenced climate. The Southern Ocean keeps summers from becoming too hot and winters from becoming extremely cold. Weather can change quickly, with sunny, cloudy, windy, and rainy periods often occurring in the same day.
High pressure systems can bring calm, clear, and dry weather. Low pressure systems and cold fronts often move in from the Southern Ocean. They bring strong winds, clouds, and rain, especially during the cooler months. Portland is known for frequent wind because it faces open water.
The ocean and Portland Bay strongly affect the local weather. Water warms and cools more slowly than land, so it reduces temperature changes. The coast also allows moist air to move inland. Nearby hills and the exposed shoreline can increase wind and rainfall in some areas.
Summer is usually mild to warm, with longer sunny days. Autumn becomes cooler and often more changeable. Winter brings cool days, cold nights, stronger winds, and regular rain. Spring is changeable, with warming temperatures but many windy or showery days. Rain can fall at any time of year, so Portland has a mild, wet coastal climate.