Belfast Sea Temperature

(Today) 2024

11.1°C / 52°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

5°C / 41°F
(overcast clouds)
Partly cloudy
Wind
0 mph
Humidity
85%

The measurements for the water temperature in Belfast, 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 Belfast water temperature derived from many years of historical sea surface temperature data.

Belfast average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Belfast
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 8 7.4 7.2 7.8 9.4 9.8 12 13.5 13.6 12.6 11.3 9.4
Max °C 10.3 9.3 9.2 10 11.1 14 15.4 15.2 14.9 14.3 13.3 11.8
Min °F 47.3 46 45.8 46.9 49.6 51.3 55 56.9 57 55.3 53.1 49.9
Max °F 49.6 47.9 47.8 49.1 51.3 55.5 58.4 58.6 58.3 57 55.1 52.3

The warmest water temperature is in August with an average around 57.7°F / 14.3°C. The coldest month is March with an average water temperature of 46.8°F / 8.2°C.

7 day tide forecast for Belfast

ThuFriSatSunMonTueWed
  • Low 01:58am
    (0.63m)
  • High 08:05am
    (3.28m)
  • Low 02:11pm
    (0.97m)
  • High 08:20pm
    (3.47m)
  • Low 02:49am
    (0.59m)
  • High 08:56am
    (3.37m)
  • Low 03:04pm
    (0.81m)
  • High 09:15pm
    (3.51m)
  • Low 03:36am
    (0.6m)
  • High 09:44am
    (3.46m)
  • Low 03:54pm
    (0.68m)
  • High 10:06pm
    (3.52m)
  • Low 04:22am
    (0.66m)
  • High 10:31am
    (3.54m)
  • Low 04:44pm
    (0.58m)
  • High 10:57pm
    (3.48m)
  • Low 05:07am
    (0.74m)
  • High 11:18am
    (3.61m)
  • Low 05:32pm
    (0.53m)
  • High 11:46pm
    (3.42m)
  • Low 05:51am
    (0.82m)
  • High 12:04pm
    (3.64m)
  • Low 06:20pm
    (0.53m)
  • High 12:35am
    (3.32m)
  • Low 06:37am
    (0.91m)
  • High 12:50pm
    (3.65m)
  • Low 07:07pm
    (0.58m)
7 day tide times for Belfast

*These tide times are estimates based on the nearest accurate location (Bangor, Northern Ireland) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.