Hotel & Travel
Global Travelers
About LISBON
Lisbon is the capital and largest city of Portugal, located along the Tagus River near the Atlantic Ocean. One of Europe’s oldest capitals, Lisbon is known for its historic neighborhoods, distinctive azulejo tiles, traditional Fado music, and scenic waterfront.
Notable attractions include the Belém Tower, Jerónimos Monastery, Praça do Comércio, and the MAAT – Museum of Art, Architecture and Technology. The city blends centuries of history with a vibrant contemporary culture, dining scene, and growing technology and innovation community.
Visas
To help you with your travel arrangements, click here for visa related information, including invitation and AIS visa letter forms.
Event Basics
Here are a few details you may want to know prior to registering for the conference or before traveling to Lisbon, Portugal.
Language
Portuguese is the official language of Portugal. English is widely spoken in Lisbon, particularly in hotels, restaurants, shops, and tourist areas.
Phone
Portugal’s country code is +351. Portuguese telephone numbers generally have nine digits. Lisbon landline numbers typically begin with 21.
Weather
Lisbon has mild winter weather. In mid-December, daytime temperatures typically reach around 14–16°C (57–61°F), with nighttime temperatures around 8–11°C (46–52°F). Rain is possible, so attendees should bring a light waterproof jacket or umbrella and check the forecast before traveling.
Time
During ICIS 2026, Lisbon will be on Western European Time (WET), UTC/GMT +0.
Electricity
Portugal uses 230V, 50 Hz electricity. Power outlets use Type C and Type F plugs, with two round pins. Travelers from countries using other plug types or voltages may need an adapter and/or voltage converter.
Adapter
In general, an adapter is all you need for non-motorized appliances. Examples include phone chargers, laptops, etc.
Converter
A converter is necessary if you intend to use appliances with a motor, such as a hairdryer or an electric razor.
Emergencies
Dial 112 for police, fire, or ambulance services. This is the standard emergency number throughout Portugal and the European Union.
Internet Access
Attendees who reserve a room using the ICIS 2026 housing link will enjoy complimentary wireless internet access in their guest room. Wi-Fi will also be available to attendees at the Lisbon Congress Centre.
Currency-Cash & Credit Cards
The Euro (€ / EUR) is Portugal’s official currency. Credit and debit cards are widely used in Lisbon, particularly at hotels, restaurants, larger shops, and tourist attractions. Contactless payment is also common. It is advisable to carry a small amount of euros for cafés, small restaurants, markets, taxis, and other establishments that may prefer or require cash. ATMs are readily available throughout the city.
Visa and Mastercard are the safest cards to carry; American Express is less universally accepted.
Cultural Nuances
Portuguese culture is generally polite and courteous. A friendly greeting when entering shops, restaurants, or other establishments is appreciated. English is widely understood in Lisbon but using simple Portuguese greetings such as Bom dia (Good morning) or Obrigado/Obrigada (Thank you) is welcomed.
Attire
Attire at AIS conferences is business casual. Since meeting room temperatures and personal comfort levels may vary, a light sweater or jacket is recommended. A light waterproof layer is also useful for Lisbon’s December weather.
Etiguette
A handshake is appropriate when meeting someone in a professional setting. Portuguese communication tends to be polite and somewhat formal when first meeting. Professional titles and surnames may be used initially, with first names used once invited. Punctuality is appreciated for business and conference-related meetings.
Tipping
Tipping in Portugal is appreciated but not obligatory. In restaurants, rounding up the bill or leaving approximately 5–10% for good service is common. Small tips may also be given to taxi drivers and hotel staff for good service.