Current sea water temperature:
+61.5°F
| Minimum sea water temperature in August: | 63.0°F |
| Maximum sea water temperature in August: | 54.3°F |
| Average sea water temperature in August: | 57.9°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| August 17 | 61.5°F | August 12 | 61.2°F |
| August 16 | 62.2°F | August 11 | 60.4°F |
| August 15 | 62.6°F | August 10 | 60.6°F |
| August 14 | 63.0°F | August 9 | 61.2°F |
| August 13 | 61.7°F | August 8 | 61.3°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 61.7°F. The highest and lowest sea temperatures during the month were 63.0°F and 60.4°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:
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
August
August
| Belfast |
Best time for vacation in Belfast
Belfast on a weather map
Places in United Kingdom:
Name
°F
24 Hours Forecast
Belfast
Local time: 01:27
August 18, tuesday
0300
57°F
E
13 mph
13 mph
0600
55°F
E
10 mph
10 mph
0900
57°F
E
13 mph
13 mph
1200
61°F
E
14 mph
14 mph
1500
64°F
E
16 mph
16 mph
1800
63°F
E
12 mph
12 mph
2100
55°F
E
7 mph
7 mph
August 19, wednesday
0000
52°F
NE
7 mph
7 mph
