Sea Temperature

Belfast Sea Temperature

(Today) Dec 2019

13.4°C / 56.1°F

Current weather

11°C / 53°F
(light rain)

Partly cloudy

13 mph



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.

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.

Maximum and minimum monthly sea temperatures in Belfast
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 7.6 7.2 6.9 7.7 9.1 9.7 11.8 13.3 13.6 12.6 11.2 9.2
Max °C 10 9.1 9.1 9.9 10.9 13.9 15.4 15.1 14.9 14.2 13.4 11.8
Min °F 46.6 45.7 45.3 46.7 49.1 51.1 54.7 56.7 57 55.3 53 49.6
Max °F 49 47.6 47.5 48.9 50.9 55.3 58.3 58.5 58.3 56.9 55.2 52.2

7 day tide forecast for Belfast

  • High 5:31am
  • Low 11:21am
  • High 5:41pm
  • Low 12:28am
  • High 6:37am
  • Low 12:34pm
  • High 6:48pm
  • Low 1:28am
  • High 7:36am
  • Low 1:38pm
  • High 7:48pm
  • Low 2:17am
  • High 8:26am
  • Low 2:29pm
  • High 8:37pm
  • Low 2:58am
  • High 9:09am
  • Low 3:11pm
  • High 9:19pm
  • Low 3:35am
  • High 9:47am
  • Low 3:49pm
  • High 9:57pm
  • Low 4:10am
  • High 10:22am
  • Low 4:27pm
  • High 10:33pm

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

Average December sea temperatures

  • Max: 11.8°C / 53.2°F
  • Avg: 10.5°C / 50.9°F
  • Min: 9.2°C / 48.6°F
Belfast average sea temperature chart

These average ocean temperatures for Belfast are calculated from several years of archived data.

Map showing location of Belfast (54.583330, -5.933330)

Locations nearby


Whilst sea temperatures for Belfast are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.

Alternate names for Belfast
BFS, Beal Feirste, Behlfast, Belfast, Belfast City, Belfasta, Belfasto, Belffast, Belfāsta, Beul-Feirste, Béal Feirste, Mpelphast, baelpaseuteu, bei er fa si te, belpaseuteu, berufasuto, blfast, Μπέλφαστ, Белфаст, Бэлфаст, בלפאסט, بلفاست, ベルファスト, 貝爾法斯特, 贝尔法斯特, 밸파스트, 벨파스트

Belfast average sea temperature chart