The Thermal Waters of Sirmione

Sirmione occupies the tip of a narrow peninsula that extends four kilometers into the southern end of Lake Garda. The Castello Scaligero guards the entrance to the old town at the peninsula’s narrowest point, and beyond it the streets of the historic center lead south past the Grotte di Catullo, the Roman villa ruins at the tip, and down to the waterfront where the Aquaria spa complex sits within a park above the lake.

The outdoor thermal pools look south across the water toward the Alps, and on a clear morning the mountains are visible above the far shore. The water that fills them has been in the ground for approximately 20 years before it surfaces. The Fonte Boiola emerges from below the bed of the lake, 25 meters from the shore, at a temperature of 69 degrees Celsius.

The water is classified as hyperthermal and sulphurous salsobromoiodic, containing significant amounts of sulfur in the form of hydrogen sulfide, sodium, bromine, and iodine, enriched across its 20-year journey through limestone from the watershed basin of Monte Baldo.

The thermal tradition at Sirmione dates to the Roman period. The Grotte di Catullo at the tip of the peninsula are the ruins of a Roman villa built for the Gens Valeria family, and the Roman settlement here was connected to the known therapeutic properties of the spring water surfacing in the lake nearby. The Roman poet Catullus praised Sirmione in his verse, and the association between the place and a particular quality of rest runs through the literary record from his time onward.

The exact source of the thermal water was rediscovered in 1889 by a Venetian diver named Procopio, who located the Boiola spring below the lake’s surface. The first thermal center opened the following year, and in 1921 the Società Terme e Grandi Alberghi di Sirmione was founded. The Aquaria center was inaugurated in 2003 at the Catullo site, referencing the Roman tradition and offering thermal pools as a source of wellbeing.

The Terme di Sirmione operation runs across two distinct functions. The medical thermal centers offer treatments for a range of conditions, some covered by the Italian National Health Service. The Aquaria complex is the wellness side, using the same water in an environment designed around relaxation and sensory experience rather than clinical treatment.

Aquaria covers 10,000 square meters, with more than 3,500 square meters of covered surface, 6,500 square meters of park, and 700 square meters of thermal water. The complex is open to the public from early morning, and the first session of the day produces the pools and the outdoor park at a pace and with a level of occupancy that the later hours do not.

The outdoor thermal pools looking across the lake to the Alps are the defining feature of the Aquaria experience, and the quality of the view, and the quality of the silence around the water, changes as the complex fills through the morning.

A private arrangement that includes a reservation for the first session of the day, combined with a treatment booking that takes place before the main visitor flow arrives, produces a morning at Aquaria that the standard visit, arriving mid-morning without advance booking, does not replicate.

The specific treatments available at Aquaria, from hydromassage and aromochromatic showers to the vascular path, the sauna circuit, and the personalized wellness programs, require advance booking regardless of the time of arrival, and the combination of a treatment and the thermal pools in the early morning is the most complete version of what the complex offers.

The outdoor thermal pools sit within a park on the waterfront at the southern end of the peninsula, facing south across the lake toward the Alps. The sulphurous character of the water is present as a faint mineral quality, and the light on the lake in the early morning comes from the east, catching the surface and the mountains behind it.

The indoor section includes aromochromatic showers, effervescent beds, hydromassages, and a sauna circuit of saunas, steam baths, and emotional showers. The relaxation area is divided into themed rooms, each designed around a specific sensory environment, with personalized treatment and massage programs available alongside the thermal water circuit.

The Grotte di Catullo sit at the tip of the peninsula, a short walk from the Aquaria complex. The ruins cover two hectares among 1,500 olive trees above the lake, and the view from the upper terraces takes in the full width of the lake with the Alps rising behind it. The connection between the Roman villa that occupied that position and the thermal spring it drew on gives the morning at Aquaria a historical depth that a purpose-built spa hotel cannot provide.

Do Not Disturb arranges the Aquaria visit as part of a broader day in Sirmione, combining the thermal morning with a private guide visit to the Grotte di Catullo, the Castello Scaligero, and the historic center.

Entry to Aquaria requires advance booking, particularly for the treatment and massage programs, and Do Not Disturb coordinates the timing of the treatment booking with the first session of the day to maximize the quality of the morning at the complex.

Ready to plan your morning at the Aquaria thermal spa in Sirmione? Speak with Do Not Disturb to begin your journey.