Home › Ireland › Donegal › Rathmullan
Rathmullan sea temperature today
Rathmullan, Donegal, Ireland. Coastal town.
Latest satellite reading, 28 Oct 2026
12.8 °C
55 °F. 0.3 °C warmer than normal for 28 Oct (normal 12.5 °C).
Normal for this date
12.5 °C
2003 to 2014 average for 28 Oct
Change over 7 days
-0.7 °C
Compared with the reading a week earlier
Wetsuit guide (general)
4/3 mm full wetsuit
Band 12 to 15 °C. Boots are worth considering.
Last 30 days at Rathmullan
Solid line: daily satellite reading (°C). Dashed line: normal for each date (2003 to 2014 average).
Recent daily readings
| Date | Reading | Normal | Difference |
|---|---|---|---|
| 28 Oct 2026 | 12.8 °C | 12.5 °C | +0.3 |
| 27 Oct 2026 | 12.7 °C | 12.7 °C | -0.0 |
| 26 Oct 2026 | 12.6 °C | 12.8 °C | -0.2 |
| 25 Oct 2026 | 12.6 °C | 12.8 °C | -0.2 |
| 24 Oct 2026 | 12.7 °C | 12.9 °C | -0.2 |
| 23 Oct 2026 | 13.1 °C | 12.9 °C | +0.2 |
| 22 Oct 2026 | 13.2 °C | 12.9 °C | +0.3 |
Normal sea temperature by month at Rathmullan
Averages of the satellite analysis for 2003 to 2014. The sea here is normally warmest in August (about 15.2 °C) and coldest in February (about 7.7 °C).
| Month | Average | Lowest day | Highest day |
|---|---|---|---|
| January | 8.5 °C | 7.9 °C | 9.2 °C |
| February | 7.7 °C | 7.5 °C | 7.9 °C |
| March | 7.7 °C | 7.3 °C | 8.1 °C |
| April | 9.0 °C | 8.1 °C | 9.7 °C |
| May | 10.6 °C | 9.7 °C | 11.9 °C |
| June | 12.8 °C | 11.8 °C | 13.7 °C |
| July | 14.6 °C | 13.8 °C | 15.4 °C |
| August | 15.2 °C | 15.0 °C | 15.4 °C |
| September | 14.8 °C | 14.2 °C | 15.1 °C |
| October | 13.2 °C | 12.3 °C | 14.1 °C |
| November | 11.6 °C | 10.8 °C | 12.3 °C |
| December | 10.0 °C | 9.3 °C | 10.8 °C |
Nearby places
| Place | Area | Distance | Latest |
|---|---|---|---|
| Lisfannon Beach | Donegal | 4 km | 12.8 °C |
| Buncrana | Donegal | 7 km | 12.8 °C |
| Downings | Donegal | 23 km | 12.8 °C |
| Dunfanaghy | Donegal | 29 km | 12.9 °C |
| Culdaff | Donegal | 32 km | 12.7 °C |
More: all places in Donegal, Ireland.
About this reading
The value comes from the satellite analysis grid cell centred at 55.09° N, 7.54° W, under 1 km from the GeoNames point for Rathmullan. Each cell is about 1 km across. It is the nearest cell the analysis treats as open sea.
Please note. These are satellite-based estimates of the sea surface temperature on a grid about 1 km wide. Water at the shoreline, in rock pools, estuaries and shallow bays can be several degrees warmer or colder. Readings are usually one to two days old. This is not safety advice: check local lifeguard and coastguard guidance before swimming. Water below about 15 °C can cause cold water shock.