| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2026 | Njardvik | Icelandic Cup | 1 | 0 | 0 | 1 | 0 | – |
| 2025 | Hafnarfjordur | Icelandic Cup | 1 | 0 | 0 | 1 | 0 | – |
| 2025 | Hafnarfjordur | League Cup | 3 | 0 | 0 | 1 | 0 | – |
| 2023 | Hafnarfjordur | Icelandic Cup | 2 | 1 | 0 | 1 | 0 | – |
| 2023 | Hafnarfjordur | League Cup | 3 | 0 | 0 | 2 | 0 | – |
| 2022 | Hafnarfjordur | Icelandic Cup | 5 | 0 | 0 | 1 | 0 | – |
| 2022 | Hafnarfjordur | League Cup | 5 | 0 | 0 | 0 | 0 | – |
| Total | 20 | 1 | 0 | 7 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| 02 May 2027 | Njardvik | Hafnarfjordur | Return from loan | |
| - | Hafnarfjordur | Njardvik | Loan |
J. Arnarsson career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.