The Portuguese Singles Chart ranks the best-performing singles in Portugal, as compiled by the Associação Fonográfica Portuguesa.
| Week | Song | Artist | Reference | |
|---|---|---|---|---|
| 1/2018 | "Rockstar" | Post Malone featuring 21 Savage | [1] | |
| 2/2018 | [2] | |||
| 3/2018 | "Havana" | Camila Cabello featuring Young Thug | [3] | |
| 4/2018 | [4] | |||
| 5/2018 | "God's Plan" | Drake | [5] | |
| 6/2018 | [6] | |||
| 7/2018 | [7] | |||
| 8/2018 | [8] | |||
| 9/2018 | [9] | |||
| 10/2018 | [10] | |||
| 11/2018 | [11] | |||
| 12/2018 | [12] | |||
| 13/2018 | [13] | |||
| 14/2018 | [14] | |||
| 15/2018 | [15] | |||
| 16/2018 | "Faz gostoso" | Blaya | [16] | |
| 17/2018 | "No Tears Left to Cry" | Ariana Grande | [17] | |
| 18/2018 | "Faz gostoso" | Blaya | [18] | |
| 19/2018 | [19] | |||
| 20/2018 | [20] | |||
| 21/2018 | [21] | |||
| 22/2018 | "One Kiss" | Calvin Harris and Dua Lipa | [22] | |
| 23/2018 | [23] | |||
| 24/2018 | [24] | |||
| 25/2018 | [25] | |||
| 26/2018 | "Sad!" | XXXTentacion | [26] | |
| 27/2018 | [27] | |||
| 28/2018 | "X" | Nicky Jam and J Balvin | [28] | |
| 29/2018 | "In My Feelings" | Drake | [29] | |
| 30/2018 | [30] | |||
| 31/2018 | [31] | |||
| 32/2018 | [32] | |||
| 33/2018 | [33] | |||
| 34/2018 | [34] | |||
| 35/2018 | [35] | |||
| 36/2018 | [36] | |||
| 37/2018 | [37] | |||
| 38/2018 | "Mafiosa" | Lartiste featuring Caroliina | [38] | |
| 39/2018 | "Cafeína" | DJ Dadda featuring Plutónio | [39] | |
| 40/2018 | [40] | |||
| 41/2018 | [41] | |||
| 42/2018 | "Taki Taki" | DJ Snake featuring Selena Gomez, Ozuna and Cardi B | [42] | |
| 43/2018 | [43] | |||
| 44/2018 | [44] | |||
| 45/2018 | [45] | |||
| 46/2018 | "Thank U, Next" | Ariana Grande | [46] | |
| 47/2018 | "Shallow" | Lady Gaga and Bradley Cooper | [47] | |
| 48/2018 | [48] | |||
| 49/2018 | "Thank U, Next" | Ariana Grande | [49] | |
| 50/2018 | [50] | |||
| 51/2018 | [51] | |||
| 52/2018 | "All I Want for Christmas Is You" | Mariah Carey | [52] |