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Live forecasts update automatically; written guidance last reviewed 13 June 2026 by the Insight Britain weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Dumbarton sits on the north bank of the Firth of Clyde, where the River Leven meets the sea. The live forecast above gives you the current conditions for this West Dunbartonshire town – temperature, wind speed, humidity and precipitation chance – so you can plan your day.
What does the live forecast above tell you about Dumbarton?
The widget shows the present temperature, wind direction and strength, plus a rain icon if showers are expected. Check the “feels like” figure, which accounts for the damp westerly breeze often funnelling up the Clyde estuary. The hourly breakdown lets you see when any rain is likely to move through Dumbarton.
What is Dumbarton’s typical climate through the seasons?
Dumbarton has a maritime climate – mild winters and cool summers, heavily influenced by the Atlantic. Winter averages hover in the low single digits Celsius, with occasional frost and crisp days when high pressure builds. Summer afternoons typically reach the high teens, with the odd day touching 20°C or a little above. Rainfall is spread fairly evenly across the year, though autumn and winter tend to be wetter and windier. The town gets about 1,500 mm of rain annually, making it one of Scotland’s wetter lowland areas.
How does local geography affect Dumbarton’s weather?
The Firth of Clyde and the nearby Kilpatrick Hills create a local rain-shadow effect on some days, but the prevailing south-westerlies often bring cloud and rain off the Atlantic. Dumbarton Rock and the valley of the River Leven can funnel winds, increasing gusts in the town centre. The urban area sits low-lying, so frost can be less severe than in surrounding rural valleys.
When is the best time to visit Dumbarton and what should you pack?
Late spring (May–June) and early autumn (September) offer the best balance of milder temperatures and lower rainfall. Pack layers – a waterproof jacket is essential even in summer, as is a warm mid-layer for breezy afternoons. Sturdy footwear is useful for exploring nearby hills or the castle. Sunscreen and sunglasses are worth bringing for rare clear-sky days.
Which nearby areas should you also check?
- Erskine – just across the River Clyde, often shares the same weather pattern.
- Clydebank – a short distance east, with similar maritime conditions.
- Greenock – further down the firth, often windier and cloudier.
- Helensburgh – to the north-west, with a more sheltered coastal aspect.
- Renfrew and Bearsden – inland suburbs that can be a few degrees warmer in summer.
What will the weather be like in Dumbarton tomorrow?
Check the hourly breakdown in the live forecast above for tomorrow’s temperature trend and rain probability. Typically, Dumbarton sees a mix of cloud and showers, but the widget will give you the specific timing for your area.
What is the 10–14 day outlook for Dumbarton?
For a longer view, see our 10-day forecast for Dumbarton. It shows day-by-day temperature ranges, wind directions and precipitation chances, updated twice a day to capture changes in Atlantic weather systems.
Does it rain a lot in Dumbarton?
Yes – Dumbarton’s west-coast location means rain is frequent, with around 150 wet days a year. That said, showers are often light and short-lived. The UK weather warnings page will alert you to any significant rain events.
For a wider picture of conditions across the country, visit our UK weather hub or browse the full list of UK towns for local guides.