Average GPS coordinates for Silvosa Postcode location: 41.258, -8.45. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Silvosa on map:

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Listing cities & postcodes (3):
>> Porto, 4560-042 Silvosa, Penalva do Castelo, Constantim, GPS coordinates: 41.2571,-8.5381
>> Porto, 4575-178 Silvosa, Penalva do Castelo, Mazouco, GPS coordinates: 41.1933,-8.3
>> Porto, 4620-237 Silvosa, Ribeira Grande, Cortiços, GPS coordinates: 41.3238,-8.5119