When crossing into Portugal, you are allowed to import the following:

• tobacco (200 cigarettes; or 100 cigarillos; or 50 cigars; or 250g tobacco) if you're over 17 years of age,
• 1 litre of alcohol,
• 50 ml of perfume,
• 500 gm coffee,
• 100 gm tea,
• 2 kg fish,
• 250 gm caviar
• and good valued at a maximum of 175 euros.

Please note that travellers might be required to prove that items are for personal consumption only.

Exports that are prohibited include pornography, dairy and meat products, wild flora and fauna, precious metals, weapons, drugs and intellectual property.

More information can be found here.