Barometric Pressure Forecast for Weymouth, United Kingdom
Barometric pressure forecast for Weymouth, Dorset — on the Jurassic Coast behind the shelter of Portland and Chesil Beach. See current barometric pressure and what it means for weather-sensitive people.
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Pressure and weather in Weymouth
Weymouth curves around its bay on the Dorset coast, sheltered to the south by the Isle of Portland and to the west by the eighteen-mile shingle bank of Chesil Beach. That geography gives the town one of the sunniest records in Britain and a notably mild winter, but it does nothing to protect it from the pressure swings that arrive with Atlantic depressions. From October through February the north Atlantic storm track aims a procession of lows at the southwest of England, and Weymouth catches most of them: falls of twenty-five to thirty-five millibars over a day are routine, and the deepest winter systems go further. The Channel position adds a second signature, the strong southwesterly gales that pile water into the bay on a rising tide. Summer is a different climate altogether, with Azores high pressure often parking over the region for weeks and the barometer sitting stubbornly above 1020.
What this means for you
The contrast between a stormy Atlantic winter and a becalmed Azores summer is unusually sharp on this coast, which makes the seasonal pattern easy to read. If your weather migraine days cluster between October and February rather than spreading through the year, the depression track is the likely culprit.