Swimming in Derry (Londonderry) in august 2025: Average sea temperature in august and tide times in august 2025
Average sea temperature in Derry (Londonderry) in august 2025.
In august, according to seasonal norms, the sea temperature in Derry (Londonderry) is:
Minimum: 57°F
Average: 59°F
Maximum: 61°F
Other useful seasonal weather averages in august:
- Outside temperature: 52°F to 63°F
- Most common weather: "Cloudy"
- The wind blows at 6.2mph
- It rains a total of 2.6in, over 3 day(s).
Should we swim in Derry (Londonderry) in august?
No... The water temperature in Derry (Londonderry) in august is freezing
You won't be able to swim in Derry (Londonderry) in august! The water temperature is freezing, reaching as low as 57°F (and only 61°F at best)! Our advice: if you are going to Derry (Londonderry) this month, plan to sightsee and forget the beach!
Note also that in august, the climate is bad with an average outside temperature of 58°F, 2.6in of precipitation (over 3 days) and 95.11 % humidity.
Water and normal seasonal temperatures in Derry (Londonderry) in august
| August | |||
| Average sea temperature | 59°F | ||
| Minimum sea temperature | 57°F | ||
| Maximum sea temperature | 61°F | ||
| Average outside temperature | 58°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 54°F | ||
| Wind speed | 11.8mph | ||
| Wind temperature | 50°F | ||
| Precipitation | 2.6in | ||
| Number of days of rain | 3 jour(s) (9%) | ||
| Humidity | 96% | ||
| Visibility in kilometers | 7.75km | ||
| Cloud cover | 69% | ||
| Our opinion | freezing swimming |
Chart of the tides in august 2025
Tide times in august 2025 in Derry (Londonderry)
Swim elsewhere in Northern Ireland in august
| City | Average T° | Min. T° | Max. T° | Our opinion | Belfast in august | 58°F | 59°F | freezing swimming | Portrush in august | 58°F | 60°F | freezing swimming | Portstewart in august | 58°F | 60°F | freezing swimming |