Current sea water temperature:
+54.9°F
| Minimum sea water temperature in October: | 58.1°F |
| Maximum sea water temperature in October: | 53.2°F |
| Average sea water temperature in October: | 55.9°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| October 20 | 54.9°F | October 15 | 56.3°F |
| October 19 | 55.4°F | October 14 | 56.3°F |
| October 18 | 55.8°F | October 13 | 57.0°F |
| October 17 | 56.1°F | October 12 | 57.2°F |
| October 16 | 56.3°F | October 11 | 57.2°F |
Monthly sea water temperature, °F
When is the warmest sea in Belfast?
Based on the data about daily sea water temperature for the last three years the warmest sea in Belfast was noticed in August, September and July.
Monthly Sea Temperatures in Belfast, °F
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 61.3°F. The highest and lowest sea temperatures during the month were 63.0°F and 59.9°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 59.6°F. The highest and lowest sea temperatures during the month were 61.5°F and 57.7°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 60.9°F. The highest and lowest sea temperatures during the month were 63.7°F and 55.9°F.
current
weather
weather
| Belfast |
weather in
October
October
| Belfast |
Best time for vacation in Belfast
Belfast on a weather map
Places in United Kingdom:
Name
°F
24 Hours Forecast
Belfast
Local time: 02:17
October 21, wednesday
0300
46°F
W
8 mph
8 mph
0600
50°F
W
11 mph
11 mph
0900
48°F
E
7 mph
7 mph
1200
43°F
E
24 mph
24 mph
1500
45°F
E
22 mph
22 mph
1800
43°F
E
17 mph
17 mph
2100
39°F
NE
9 mph
9 mph
October 22, thursday
0000
37°F
E
7 mph
7 mph
