Current Sea Water Temperature:
+62.6°F
| Maximum Sea Water Temperature in August: | 64.4°F |
| Minimum Sea Water Temperature in August: | 54.8°F |
| Average water temperature in August: | 58.8°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 19 | 62.6°F | August 14 | 64.4°F |
| August 18 | 62.4°F | August 13 | 63.0°F |
| August 17 | 62.8°F | August 12 | 62.4°F |
| August 16 | 63.6°F | August 11 | 61.6°F |
| August 15 | 64.0°F | August 10 | 61.8°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 62.9°F. The maximum and minimum values were 61.6°F and 64.4°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Belfast was 59.7°F. The maximum and minimum values were 57.8°F and 62.2°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 |  |
+74 |
| Belfast |  |
+62 |
| Bournemouth |  |
+74 |
| Brighton | |
+64 |
| Bristol | |
+74 |
| Edinburgh | |
+64 |
| Gibraltar | |
+84 |
| Glasgow | |
+62 |
| Liverpool | |
+66 |
| London | |
+76 |
| Middlesbrough | |
+68 |
| Plymouth | |
+72 |
| Scarborough | |
+70 |
| Torquay | |
+70 |
| York |  |
+70 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Belfast
Local time: 14:29
19 aug, wednesday
| 1500 |  |
62°F | NE 9 mph |
| 1800 | |
60°F | E 6 mph |
| 2100 | |
54°F | E 5 mph |
20 aug, thursday
| 0000 |  |
52°F | E 4 mph |
| 0300 | |
50°F | SE 4 mph |
| 0600 |  |
52°F | SE 6 mph |
| 0900 | |
54°F | SW 7 mph |
| 1200 | |
58°F | S 8 mph |