Current sea water temperature:
+57.9°F
| Minimum sea water temperature in July: | 62.2°F |
| Maximum sea water temperature in July: | 51.4°F |
| Average sea water temperature in July: | 56.6°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| July 7 | 57.9°F | July 2 | 56.7°F |
| July 6 | 57.7°F | July 1 | 57.7°F |
| July 5 | 55.9°F | June 30 | 58.3°F |
| July 4 | 56.3°F | June 29 | 59.0°F |
| July 3 | 56.7°F | June 28 | 59.0°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
July
July
| Belfast |
Best time for vacation in Belfast
Belfast on a weather map
Places in United Kingdom:
Name
°F
24 Hours Forecast
Belfast
Local time: 20:10
July 07, tuesday
2100
63°F
E
4 mph
4 mph
July 08, wednesday
0000
55°F
NE
2 mph
2 mph
0300
54°F
NE
2 mph
2 mph
0600
54°F
NE
2 mph
2 mph
0900
64°F
NE
3 mph
3 mph
1200
70°F
N
5 mph
5 mph
1500
73°F
NE
8 mph
8 mph
1800
72°F
NE
7 mph
7 mph
