Swimming in Portstewart in august 2025: Average sea temperature in august and tide times in august 2025
Average sea temperature in Portstewart in august 2025.
In august, according to seasonal norms, the sea temperature in Portstewart is:
Minimum: 56°F
Average: 58°F
Maximum: 60°F
Other useful seasonal weather averages in august:
- Outside temperature: 55°F to 61°F
- Most common weather: "Moderate rain at times"
- The wind blows at 6.8mph
- It rains a total of 5.9in, over 10 day(s).
Should we swim in Portstewart in august?
No... The water temperature in Portstewart in august is freezing
You won't be able to swim in Portstewart in august! The water temperature is freezing, reaching as low as 56°F (and only 60°F at best)! Our advice: if you are going to Portstewart this month, plan to sightsee and forget the beach!
Note also that in august, the climate is tolerable with an average outside temperature of 58°F, 5.9in of precipitation (over 10 days) and 91.15 % humidity.
Water and normal seasonal temperatures in Portstewart in august
| August | |||
| Average sea temperature | 58°F | ||
| Minimum sea temperature | 56°F | ||
| Maximum sea temperature | 60°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 56°F | ||
| Wind speed | 14.3mph | ||
| Wind temperature | 52°F | ||
| Precipitation | 5.9in | ||
| Number of days of rain | 10 jour(s) (33%) | ||
| Humidity | 92% | ||
| Visibility in kilometers | 8.99km | ||
| Cloud cover | 59% | ||
| Our opinion | freezing swimming |
Chart of the tides in august 2025
Tide times in august 2025 in Portstewart
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 | Derry (Londonderry) in august | 59°F | 61°F | freezing swimming | Portrush in august | 58°F | 60°F | freezing swimming |