Average GPS coordinates for Seixal Postcode location: 41.294, -8.581. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Seixal on map:

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Listing cities & postcodes (9):
>> Porto, 4620-317 Seixal, Ribeira Grande, Edroso, GPS coordinates: 41.2933,-8.5533
>> Porto, 4625-272 Seixal, Ribeira Brava, Espadanedo, GPS coordinates: 41.2,-8.3803
>> Porto, 4745-587 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-588 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-589 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-613 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-614 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-630 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132
>> Porto, 4745-632 Seixal, Sernancelhe, Mazouco, GPS coordinates: 41.3075,-8.6132