Aqua Alsietina
Archaeological Site Ancient Roman reservoir supplying water to Imperial Rome
Aqua Alsietina survives as traces of an ancient Roman aqueduct that once supplied water for Augustus’ artificial naval display; historians and walkers examine masonry remnants and route alignments west of Rome.
The Aqua Alsietina is an ancient Roman aqueduct that carried water to Rome from the Lacus Alsietinus. It was constructed in the reign of Emperor Augustus, around 2 BC, and is known for supplying non-potable water used for imperial naumachiae and irrigation.
Surviving elements are fragmentary and mainly visible as ruins and buried masonry rather than an intact aboveground channel. Modern traces of its route can be identified in the landscape northwest of Rome near the lake historically called Alsietinus.
Commissioned in the Augustan period, the aqueduct was built to bring water from the Alsietinus watershed into the city for artificial naval displays and other utilitarian uses rather than drinking. Over time its use declined and most of the structure fell into ruin, leaving only occasional visible remains and documentary references in Roman sources.
The aqueduct drew from the Lacus Alsietinus in the Lazio region northwest of central Rome. Its intake and early stretches lie in the low hills and plains outside the modern city.
Best Time to Visit Aqua Alsietina #
Visit in spring or autumn for milder weather and fewer intense summer crowds when exploring outdoor archaeological remains near Rome.
Weather & Climate near Aqua Alsietina #
Aqua Alsietina's climate is classified as Hot-Summer Mediterranean - Hot-Summer Mediterranean climate with warm summers (peaking in August) and cold winters (coldest in January). Temperatures range from 4°C to 30°C. Moderate rainfall (703 mm/year).
January
January is the coolest month with highs of 12°C and lows of 4°C. Moderate rainfall (73 mm) and partly cloudy skies.
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February
February is cold with highs of 13°C and lows of 4°C. Moderate rainfall (67 mm) and partly cloudy skies.
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March
March is cool with highs of 16°C and lows of 6°C. Moderate rainfall (59 mm) and partly cloudy skies.
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April
April is cool with highs of 18°C and lows of 8°C. Moderate rainfall (58 mm) and partly cloudy skies.
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May
May is cool with highs of 23°C and lows of 12°C. Moderate rainfall (40 mm).
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June
June is mild with highs of 27°C and lows of 16°C. Light rainfall and mostly sunny skies.
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July
July is warm with highs of 30°C and lows of 19°C. The driest month with just 14 mm and clear sunny skies.
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August
August is the warmest month with highs of 30°C and lows of 19°C. Moderate rainfall (32 mm) and clear sunny skies.
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September
September is mild with highs of 26°C and lows of 16°C. Moderate rainfall (65 mm) and mostly sunny skies.
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October
October is cool with highs of 22°C and lows of 12°C. Regular rainfall (88 mm).
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November
November is cool with highs of 16°C and lows of 8°C. The wettest month with 95 mm of rain and partly cloudy skies.
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December
December is cold with highs of 13°C and lows of 5°C. Regular rainfall (83 mm) and partly cloudy skies.
