Swimming in Portstewart in july 2025: Average sea temperature in july and tide times in july 2025
Average sea temperature in Portstewart in july 2025.
In july, according to seasonal norms, the sea temperature in Portstewart is:
Minimum: 54°F
Average: 56°F
Maximum: 59°F
Other useful seasonal weather averages in july:
- Outside temperature: 56°F to 62°F
- Most common weather: "Moderate rain at times"
- The wind blows at 7.5mph
- It rains a total of 6in, over 11 day(s).
Should we swim in Portstewart in july?
No... The water temperature in Portstewart in july is freezing
You won't be able to swim in Portstewart in july! The water temperature is freezing, reaching as low as 54°F (and only 59°F at best)! Our advice: if you are going to Portstewart this month, plan to sightsee and forget the beach!
Note also that in july, the climate is tolerable with an average outside temperature of 59°F, 6in of precipitation (over 11 days) and 90.44 % humidity.
Water and normal seasonal temperatures in Portstewart in july
| July | |||
| Average sea temperature | 56°F | ||
| Minimum sea temperature | 54°F | ||
| Maximum sea temperature | 59°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 56°F | ||
| Wind speed | 13.1mph | ||
| Wind temperature | 54°F | ||
| Precipitation | 6in | ||
| Number of days of rain | 11 jour(s) (35%) | ||
| Humidity | 91% | ||
| Visibility in kilometers | 8.91km | ||
| Cloud cover | 59% | ||
| Our opinion | freezing swimming |
Chart of the tides in july 2025
Tide times in july 2025 in Portstewart
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 | Derry (Londonderry) in july | 57°F | 60°F | freezing swimming | Portrush in july | 57°F | 59°F | freezing swimming |