Transport from Madrid airport to AEMET
Line 8 of "Metro" connects the airport with Nuevos Ministerios (final stop), the trip taking 15 minutes. There are metro stations in Terminal 2, at walking distance from Terminals 1 & 3, and in Terminal 4. Trains depart every 5 minutes.
Once in Nuevos Ministerios change to line 6 (5 minutes underground walk for this change). It's a circular line and you must take the westbound direction to the third station, Metropolitano, or the fourth, Ciudad Universitaria. Both stations are at 10 minutes walk to AEMET. See the map of the area on the image bellow and the map of the Metro network in the attached link. The airport is in the upper right corner of the network. The Metro fare for a single ticket from the airport is 4.50 € (including airport supplement).
Regular taxis are available right outside the terminals. A run to the AEMET HQs can take 30 minutes in normal traffic conditions and the cost should be around 35 €.
Transport from Madrid airport to downtown Madrid
Line 8 of "Metro" connects the airport with the rest of the Metro Network. There are metro stations in Terminal 2, at walking distance from Terminals 1 & 3, and in Terminal 4. Trains depart every 5 minutes. Line 8 ends at Nuevos Ministerios station in downtown Madrid, where you can transfer to other metro lines and other means of transportation.
See the map of the Metro network among the attached links. The airport is in the upper right corner of the network. The Metro fare for a single ticket from the airport is 4.50 €, including airport supplement.
Line C1 of "Cercanías" (commuter trains) connects Terminal 4 with Chamartín and Atocha mainline train stations. It can also be used to reach Nuevos Ministerios in an alternative way (although it has less frequency than Metro and takes longer). Trains depart every 30 minutes and the trip costs 3.35 €.
Line 203 ( Exprés Aeropuerto) connects every airport terminal with Cibeles Sq. in the heart of Madrid and Atocha Railway Station. Line 200 connects the terminals with Avenida de América, the main interchange station of Eastern Madrid. The fare for line 203 is 5.00 € and it works on a 24/24 basis
Regular taxis are available right outside the terminals. A run to downtown Madrid can take 30 minutes in normal traffic conditions, and the cost should be around 35 €.
How to reach AEMET Headquarters
The address is Leonardo Prieto Castro, 8 in Ciudad Universitaria (University City), not far from Madrid downtown.
The building is located in a small hill behind to the Faculty of Chemistry. It can be easily identified from the big satellite antenna.
Nearest Metro (underground railway) stations are Metropolitano and Ciudad Universitaria, both in Line 6 (the grey circular line). From these stations the AEMET can be reached by walking some 10 minutes.
Buses number 82 and 132 have stops at 5 minutes walking distance of AEMET. Both lines depart from Moncloa Square in front of the big building of the Air Force Headquarters ("Ejercito del Aire") and of Metro station Moncloa (lines 3 & 6). Bus fare can be paid to the driver directly (1.50 € ), or by pre-paid tickets. A 10 trip ticket can be bought in all Metro stations at a cost of 12.20 € .