Derry Sea Temperature

(Today) 2024

13.3°C / 56°F

The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.

Current weather

16°C / 60°F
(broken clouds)
Partly cloudy
Wind
16 mph
Humidity
82%

The measurements for the water temperature in Derry, N Ireland are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Derry water temperature derived from many years of historical sea surface temperature data.

Derry average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Derry
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 8.5 8.2 8 8.5 9.9 10 12.4 13.6 13.3 12 11.3 9.9
Max °C 10.9 10 9.9 10.6 11.6 14.4 15.6 15.9 15.4 14.4 13.1 11.8
Min °F 48.3 47.5 47.1 48.1 50.5 51.8 55.6 57.4 56.7 54.6 53.1 50.5
Max °F 50.7 49.3 49 50.2 52.2 56.2 58.8 59.7 58.8 57 54.9 52.4

The warmest water temperature is in August with an average around 58.5°F / 14.7°C. The coldest month is March with an average water temperature of 48°F / 8.9°C.