Current Sea Water Temperature:
+59.4°F
| Maximum Sea Water Temperature in September: | 62.8°F |
| Minimum Sea Water Temperature in September: | 55.6°F |
| Average water temperature in September: | 58.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 28 | 59.4°F | September 23 | 60.0°F |
| September 27 | 59.8°F | September 22 | 60.4°F |
| September 26 | 60.0°F | September 21 | 60.0°F |
| September 25 | 60.0°F | September 20 | 59.8°F |
| September 24 | 60.4°F | September 19 | 60.2°F |
When is the Warmest Sea for Belfast?
According to our data for the last three years for Belfast the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2026 for Belfast was 62.6°F. The maximum and minimum values were 61.0°F and 64.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for Belfast was 60.9°F. The maximum and minimum values were 59.4°F and 62.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Belfast was 62.1°F. The maximum and minimum values were 56.6°F and 65.2°F respectively.
United Kingdom Resorts:
NAME
F°
| Bath |  |
+54 |
| Belfast | |
+50 |
| Bournemouth |  |
+58 |
| Brighton | |
+64 |
| Bristol |  |
+54 |
| Edinburgh | |
+50 |
| Gibraltar | |
+66 |
| Glasgow | |
+48 |
| Liverpool | |
+56 |
| London | |
+62 |
| Middlesbrough | |
+48 |
| Plymouth | |
+52 |
| Scarborough | |
+52 |
| Torquay | |
+50 |
| York | |
+50 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Belfast
Local time: 00:20
29 sep, tuesday
| 0300 |  |
52°F | NW 9 mph |
| 0600 | |
52°F | NW 16 mph |
| 0900 | |
54°F | NW 19 mph |
| 1200 | |
58°F | NW 21 mph |
| 1500 | |
58°F | NW 23 mph |
| 1800 | |
64°F | NW 22 mph |
| 2100 | |
66°F | NW 22 mph |
30 sep, wednesday
| 0000 |  |
62°F | NW 22 mph |