Current sea water temperature:
+61.9°F
| Minimum sea water temperature in July: | 63.7°F |
| Maximum sea water temperature in July: | 51.4°F |
| Average sea water temperature in July: | 56.9°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| July 27 | 61.9°F | July 22 | 62.6°F |
| July 26 | 61.7°F | July 21 | 63.3°F |
| July 25 | 62.8°F | July 20 | 63.1°F |
| July 24 | 62.6°F | July 19 | 63.1°F |
| July 23 | 63.0°F | July 18 | 62.8°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 60.8°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: 07:17
July 28, tuesday
0900
64°F
NE
15 mph
15 mph
1200
72°F
NE
16 mph
16 mph
1500
73°F
NE
16 mph
16 mph
1800
72°F
NE
12 mph
12 mph
2100
64°F
NE
6 mph
6 mph
July 29, wednesday
0000
59°F
NE
6 mph
6 mph
0300
61°F
NE
9 mph
9 mph
0600
61°F
NE
8 mph
8 mph
