Current sea water temperature:
+55.6°F
| Minimum sea water temperature in June: | 60.1°F |
| Maximum sea water temperature in June: | 48.4°F |
| Average sea water temperature in June: | 54.1°F |
| more information | |
14 days
forecast
forecast
| Belfast |
monthly
weather
weather
| Belfast |
Sea water temperature for the last 10 days:
| June 15 | 55.6°F | June 10 | 55.8°F |
| June 14 | 55.6°F | June 9 | 55.6°F |
| June 13 | 55.8°F | June 8 | 55.6°F |
| June 12 | 55.8°F | June 7 | 54.9°F |
| June 11 | 55.9°F | June 6 | 55.0°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
June
June
| Belfast |
Best time for vacation in Belfast
Belfast on a weather map
Places in United Kingdom:
Name
°F
24 Hours Forecast
Belfast
Local time: 00:06
June 16, tuesday
0300
54°F
NW
2 mph
2 mph
0600
52°F
NE
4 mph
4 mph
0900
59°F
NE
4 mph
4 mph
1200
61°F
NW
5 mph
5 mph
1500
63°F
NE
7 mph
7 mph
1800
64°F
NE
9 mph
9 mph
2100
59°F
N
5 mph
5 mph
June 17, wednesday
0000
55°F
N
5 mph
5 mph
