Sirocco Wind: A Mediterranean Phenomenon

Nov 28, 2025 0

The term Sirocco (sometimes also spelled Scirocco) is an all-inclusive name given to hot and subsequently humid southeast to southwest winds originating as hot, dry desert-air over Northern Africa, flowing northward into the southern Mediterranean basin. As discussed in an earlier article, some local weather phenomena have gained such a reputation over the years, either by its specific characteristics or by its intensity, that they have proven themselves to be worthy of their own name.

The Sirocco, probably first mentioned by the Roman poet Horace, is a strong, dry, warm and dusty wind that blows from Northern Africa to the Mediterranean. The name Sirocco is derived from the Arabic word for ‘east’ and relates to the synoptic situation that is typical for the effect: a low pressure area usually tracks NE over the Mediterranean to provide Sirocco conditions. Sirocco derives from šurūq (Arabic: شروق), verbal noun of šaraqa, related to the East, aš-šarq. Hebrew: שרקיע, romanized: šarqiyya, from Arabic.

These winds can significantly impact outdoor events, offshore operations, passenger ships, and local population centers. The Sirocco is a warm and dry wind in the Mediterranean area, with increasing humidity levels towards Europe. An eastward moving low pressure area is required in the Mediterranean, allowing a northerly wind flow.

Sirocco Wind Formation

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Formation and Characteristics

Siroccos occur in advance of surface and upper level depressions moving eastward across the southern Mediterranean Sea or northern Africa. Sirocco winds develop under low pressure conditions over the Mediterranean Sea. A Sirocco develops in response to low pressure moving east across the northern Mediterranean. The onset of this event typically occurs when a surface low and associated cold front move either offshore Tunisia or over the Tyrrhenian Sea.

When the low tracks eastward over the Mediterranean, warm and dry air is blown from Northern Africa, specifically the Sahara, over the Mediterranean to Southern Europe. They pick up dust as they blow northward over North Africa. This dust is then carried offshore and over the southern Mediterranean Sea causing reductions in visibility.

As the humidity levels of the originally dry air keep increasing over the Mediterranean Sea, saturation levels are often reached at the northern side of the Mediterranean. Consequently, Sirocco winds are typically associated with rain and cloudy weather at the Northern Mediterranean, with fog or mist events often taking place nearshore. When reaching Europe, the wind has become moist and can often be associated with fog or mist nearshore.

Map of the Mediterranean area displaying a selection of local names for the Sirocco

Regional Variations and Names

Depending on where you are, the Sirocco is inhibiting substantially different characteristics and has many different local names, too. Unlike many other specific wind phenomena, the name of the Sirocco depends locally, and is also known under some other names, describing the same phenomenon.

Along the northern African coast the hot air originates directly from the Sahara desert, producing hot, dry and dusty conditions.
Marin, Malta, Sicily, southern Italy as Scirocco.
Croatia as Jugo.
Greece as a very enervating, hot, humid wind.

In some parts of the Mediterranean region the word may be used for any warm oppressing southerly wind, often of foehn type. Over the central Mediterranean Sea, the strong south to southeast winds are known locally as Sirocco.

Impact and Effects

The sirocco causes dusty dry conditions along the northern coast of Africa, storms in the Mediterranean Sea, and warm wet weather in Southern Europe. As it travels northward, it causes clouds, fog and rain over northern Mediterranean areas. The Sirocco does not affect other parts of Europe.

Areas of dust generated by Siroccos and other local winds can often be predicted days in advance. In many cases, these strong, persistent winds will move dust northward toward the Balkans and cover far south Italy and portions of Greece in a thick, dusty haze.

The sweltering, sultry and close waether during an Sirocco event causes headaches and insomnia for many. The hot humid wind causes overnight temperatures of 30°C and above, while thermometer may well reac 40°C during daytime. Temperatures may easily exceed 40oC, and drop only mildly during nighttime, leading to sleepless nights for the local population.

Visibility becomes very poor and the fine blowing dust might result in danmage to instruments and equipment. Extreme temperature differences (up to 20°C) may occur with the following cold front and its dust may reach even Britain and northern Europe.

Although best known for its effects onshore, the Sirocco can also be experienced by sailors on the Mediterranean. The relatively high wind speeds will elevate the waves consequently, posing a threat to anyone offshore. In the Adriatic Sea for example, waves reaching up to 5m are not uncommon. With wind speed up to 40 kts and the heat associated with it, the wind is often experienced as unpleasant, and dangerous for sailors and offshore workers.

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Next to the effect on the sea state, other risks arise by means of the Sirocco as well: the high temperatures accompanied with the Sirocco could lead to dangerous situations for offshore workers.

Sirocco is commonly perceived as causing unease and an irritable mood in people. In addition, many people attribute health problems to the wind, either because of the heat and dust brought from African coastal regions, or because of the cool dampness further north in Europe. This wind also has an impact on fishing. For example, the anchovies caught in the Gulf of Trieste, near Barcola, which are in great demand as a delicacy, are caught only in a sirocco.

Strong to gale-force southerly winds develop ahead of the front and can persist for several days. In case of severe events, the Sirocco can blow constantly at gale force for a period of 1 to 1.5 days, with a force of 5-8 Bft (up to 40 kts).

Timing and Duration

Sirocco events tend to occur year-round without a favored month or season. The Sirocco can be experienced throughout the entire year, but the highest likelihood and intensity usually take place during the spring. However, strong gale-force siroccos are most common during the spring. The average duration of continuous gale force winds during a Scirocco is 10 to 12 hours and occasionally as long as 36 hours. The sirocco's duration may be as short as half a day or may last several days.

Sirocco Winds and Thunderstorms

In addition to causing dust concerns, Sirocco winds can also set the stage for strong thunderstorms. As Sirocco winds move northward across the Mediterranean and the Adriatic seas, they gain moisture. When surface lows slow or become stationary over the central Mediterranean, strong Sirocco winds pull warm, humid air northward across Italy and the Balkan Peninsula. The increased temperatures and humidity create an environment favorable for thunderstorms, especially during the spring. In the mountains, this air can rapidly rise as it’s forced over the higher terrain, enhancing thunderstorm potential. Sometimes this results in severe storms, heavy rainfall, and flooding.

Sirocco Winds and Sea Fog

Siroccos can also produce sea fog across portions of the Mediterranean region, especially over the northern Adriatic Sea and along the coast of Italy.

Dust and Visibility

Sirocco winds originate in hot, dry air over the Saharan desert. They pick up dust as they blow northward over North Africa. This dust is then carried offshore and over the southern Mediterranean Sea causing reductions in visibility. Meteorologists can locate areas of dust from satellite imagery.

Dust Plume carried by Sirocco winds moving offshore of Libya on March 22, 2018

Wind Speed

Sirocco winds with speeds of up to 100 km/h (62 mph; 54 kn) are most common during autumn and spring. Winds over the open waters of the Adriatic Sea typically reach 64-80 km/h (40-50 mph) during a significant Sirocco event. Sirocco winds are often strongest in the Dinaric Alps, which extend 400 miles along the east coast of the Adriatic Sea. Sirocco winds in this mountainous region, including the Velebit Channel offshore of Croatia, can gust over hurricane force (119 km/h or 74 mph).