The second Friday practice for the 2013 Spanish Grand Prix would see the cars go out in sunshine, a big change from the opening session. For the Williams F1 team they would continue with their updates in this session. Several drivers would use a new prototype tyre that Pirelli had supplied, including both Williams drivers Valtteri Bottas and Pastor Maldonado. After their first runs the Williams pair would be in seventeenth and eighteenth with Valtteri leading Pastor. With fifteen minutes of the session completed Rosberg was fastest, 1m:23.801, from Hamilton, Raikkonen, Alonso, Ricciardo, Vergne, Webber, Massa, Gutierrez, and Vettel tenth.

After completing five laps both Williams drivers would pit but after a short break they would return to the track. They were both again on the hard tyre but this time it was the standard tyre. Vergne would go out on the medium tyre as Valtteri started a quicker lap. He would finish his lap with a 1m:25.401 to be sixth but was 1.6 seconds off the quickest time of Rosberg. Pastor would also improve with a 1m:25.570 to be seventh. The Williams team was conducting front wing comparisons as Webber went fastest with a 1m:23.112 with Vettel second. Vergne was now fifth, 1m:24.058, on his medium tyre. Pastor had improved with a 1m:25.321 to move ahead of Valtteri. Pastor and Valtteri were tenth and eleventh with the track now very busy.

Alonso would go fastest with a 1m:23.030 with Massa now third. Pastor and Valtteri had dropped to fourteenth and fifteenth and had both pitted. Just under an hour remaining and the track was fairly empty as Webber took to the track on the medium tyre. He would set a 1m:22.891 to go quickest. Pastor was also on the track on the medium tyre joined shortly after by Valtteri. Vettel was also out on the medium tyre and would go fastest with a 1m:22.808. Valtteri would find time with his medium tyres setting a 1m:24.888 to be twelfth. Pastor was down in fifteenth as Massa moved up to fourth, 1m:23.110. Ferrari team-mate Alonso would go second fastest with a 1m:22.825 while Sutil would move up to seventh with a time of 1m:23.840.

Hamilton and Rosberg were fifth and sixth as both Williams drivers pitted. Raikkonen was now fourth, 1m:23.030, with forty minutes remaining in the session. Valtteri had dropped to fourteenth with Pastor sixteenth. Drivers were now out doing longer runs on the medium tyre. Valtteri would return to the track again on the medium tyre. With thirty minutes remaining Vettel was still fastest from Alonso, Webber, Raikkonen, Massa, Hamilton, Rosberg, Sutil, Vergne, and Di Resta tenth. Pastor would join his team-mate out on the track with Pastor on the hard tyre. There were only the Sauber's in the pits with twenty minutes remaining. Vettel would pit while Di Resta would stop out on the track with his left rear tyre looking very damaged as the tread had came off the carcass of the tyre.

Valtteri would pit briefly with fifteen minutes remaining. Both Williams drivers were out on longer runs as the final minutes of the session started. Valtteri had completed thirty four laps with Pastor thirty two. Pastor had also come in for a practice pit stop but he would pit with a few minutes remaining. The session would come to an end with Valtteri and Pastor's position unchanged. Both Williams drivers would finish the session over two seconds off the quickest time with the team again having a lot of work to assess the data from the Friday sessions to see if they can find more pace from the FW35.

Pos Driver         	  Team		        Time     Laps
 1. Sebastian Vettel      Red Bull-Renault      1m22.808s 34
 2. Fernando Alonso       Ferrari               1m22.825s 35
 3. Mark Webber           Red Bull-Renault      1m22.891s 36
 4. Kimi Raikkonen        Lotus-Renault         1m23.030s 32
 5. Felipe Massa          Ferrari               1m23.110s 37
 6. Lewis Hamilton        Mercedes              1m23.140s 35
 7. Nico Rosberg          Mercedes              1m23.398s 45
 8. Adrian Sutil          Force India-Mercedes  1m23.840s 37
 9. Jean-Eric Vergne      Toro Rosso-Ferrari    1m24.058s 31
10. Paul di Resta         Force India-Mercedes  1m24.104s 25
11. Daniel Ricciardo      Toro Rosso-Ferrari    1m24.175s 32
12. Jenson Button         McLaren-Mercedes      1m24.306s 35
13. Sergio Perez          McLaren-Mercedes      1m24.854s 31
14. Valtteri Bottas       Williams-Renault      1m24.888s 38
15. Nico Hulkenberg       Sauber-Ferrari        1m25.167s 38
16. Pastor Maldonado      Williams-Renault      1m25.321s 32
17. Esteban Gutierrez     Sauber-Ferrari        1m25.441s 37
18. Romain Grosjean       Lotus-Renault         1m25.851s 35
19. Giedo van der Garde   Caterham-Renault      1m25.963s 30
20. Jules Bianchi         Marussia-Cosworth     1m26.078s 31
21. Charles Pic           Caterham-Renault      1m26.930s 35
22. Max Chilton           Marussia-Cosworth     1m26.970s 25