Current Sea Water Temperature:
+56.4°F
| Maximum Sea Water Temperature in October: | 59.0°F |
| Minimum Sea Water Temperature in October: | 53.6°F |
| Average water temperature in October: | 56.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 18 | 56.4°F | October 13 | 57.8°F |
| October 17 | 56.8°F | October 12 | 58.0°F |
| October 16 | 57.0°F | October 11 | 58.0°F |
| October 15 | 57.0°F | October 10 | 58.0°F |
| October 14 | 57.0°F | October 09 | 58.2°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 60.7°F. The maximum and minimum values were 58.6°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 |  |
+46 |
| Belfast |  |
+36 |
| Bournemouth | |
+50 |
| Brighton |  |
+56 |
| Bristol | |
+46 |
| Edinburgh |  |
+40 |
| Gibraltar | |
+66 |
| Glasgow | |
+34 |
| Liverpool | |
+52 |
| London | |
+50 |
| Middlesbrough | |
+52 |
| Plymouth | |
+46 |
| Scarborough | |
+54 |
| Torquay | |
+46 |
| York | |
+54 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Belfast
Local time: 05:15
19 oct, monday
| 0600 |  |
36°F | SW 4 mph |
| 0900 |  |
40°F | SW 5 mph |
| 1200 | |
50°F | W 9 mph |
| 1500 | |
54°F | W 12 mph |
| 1800 | |
50°F | NW 9 mph |
| 2100 |  |
42°F | NW 5 mph |
20 oct, tuesday
| 0000 | |
42°F | NW 5 mph |
| 0300 | |
42°F | NW 5 mph |