Current sea water temperature:
+45.5°F
| Minimum sea water temperature in February: | 48.0°F |
| Maximum sea water temperature in February: | 43.5°F |
| Average sea water temperature in February: | 45.7°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| February 27 | 45.5°F | February 22 | 45.3°F |
| February 26 | 45.3°F | February 21 | 45.3°F |
| February 25 | 45.1°F | February 20 | 45.1°F |
| February 24 | 45.1°F | February 19 | 45.1°F |
| February 23 | 45.3°F | February 18 | 45.1°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 61.0°F. The highest and lowest sea temperatures during the month were 62.8°F and 58.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 58.7°F. The highest and lowest sea temperatures during the month were 61.0°F and 57.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 59.5°F. The highest and lowest sea temperatures during the month were 62.1°F and 57.7°F.
current
weather
weather
| Belfast |
weather in
March
March
| Belfast |
Best time for vacation in Belfast
Belfast on a weather map
Places in United Kingdom:
Name
°F
24 Hours Forecast
Belfast
Local time: 22:04
February 28, saturday
0000
32°F
SE
6 mph
6 mph
0300
30°F
SE
5 mph
5 mph
0600
30°F
E
4 mph
4 mph
0900
37°F
NE
4 mph
4 mph
1200
43°F
N
6 mph
6 mph
1500
45°F
N
12 mph
12 mph
1800
39°F
N
8 mph
8 mph
2100
41°F
N
5 mph
5 mph
