| Name | Gagnheiði |
| Type | Automated observational station |
| Station number | 4275 |
| WMO number | 4193 |
| Abbreviation | gagnh |
| Forecast region | East fjords(af) |
| Location | 65°13.408', 14°15.533' (65.2235, 14.2589) |
| Height above sea-level | 949.0 m a.s.l. |
| Beginning of weather observations | 1993 |
| Station owned by | Veðurstofa Íslands - Ofanflóð |



