Swimming in Derry (Londonderry) in july 2025: Average sea temperature in july and tide times in july 2025
Average sea temperature in Derry (Londonderry) in july 2025.
In july, according to seasonal norms, the sea temperature in Derry (Londonderry) is:
Minimum: 55°F
Average: 57°F
Maximum: 60°F
Other useful seasonal weather averages in july:
- Outside temperature: 54°F to 64°F
- Most common weather: "Cloudy"
- The wind blows at 7.5mph
- It rains a total of 3.1in, over 6 day(s).
Should we swim in Derry (Londonderry) in july?
No... The water temperature in Derry (Londonderry) in july is freezing
You won't be able to swim in Derry (Londonderry) in july! The water temperature is freezing, reaching as low as 55°F (and only 60°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 july, the climate is bad with an average outside temperature of 59°F, 3.1in of precipitation (over 6 days) and 93.5 % humidity.
Water and normal seasonal temperatures in Derry (Londonderry) in july
| July | |||
| Average sea temperature | 57°F | ||
| Minimum sea temperature | 55°F | ||
| Maximum sea temperature | 60°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 56°F | ||
| Wind speed | 10.6mph | ||
| Wind temperature | 54°F | ||
| Precipitation | 3.1in | ||
| Number of days of rain | 6 jour(s) (18%) | ||
| Humidity | 94% | ||
| Visibility in kilometers | 7.68km | ||
| Cloud cover | 69% | ||
| Our opinion | freezing swimming |
Chart of the tides in july 2025
Tide times in july 2025 in Derry (Londonderry)
Swim elsewhere in Northern Ireland in july
| City | Average T° | Min. T° | Max. T° | Our opinion | Belfast in july | 57°F | 60°F | freezing swimming | Portrush in july | 57°F | 59°F | freezing swimming | Portstewart in july | 56°F | 59°F | freezing swimming |