Weather in September
September in Portrane marks the beginning of meteorological autumn. The weather softens as daylight hours shorten to 12.7 hours, yet there's enough light for outdoor fun. The sea remains relatively warm, though temperatures fall to 14.8°C (58.6°F) from the year’s peak in August. The turn from August's heat to September's cool has the charm of autumn's tranquility. As October approaches, one anticipates further shortening of daylight and dropping sea temperatures.
Note: Dipping into 14.8°C (58.6°F) below 10°C (50°F) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 13°C (55.4°F) feels cold to the bone.
On the first day of September in Portrane, sunrise is at 6:34 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:03 pm IST.
[Resources]Sea temperature
In September, the average sea temperature in Portrane is 14.8°C (58.6°F).Note: Dipping into 14.8°C (58.6°F) below 10°C (50°F) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 13°C (55.4°F) feels cold to the bone.
Daylight
The average length of the day in September is 12h and 41min.On the first day of September in Portrane, sunrise is at 6:34 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:03 pm IST.
Frequently asked questions
What is the water temperature in September in Portrane?
In Portrane, the average seawater temperature in September is 14.8°C (58.6°F). Swimming in 14.8°C (58.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
What is the average length of the day in September in Portrane?
In September, the average day length is 12h and 41min.
When is the sunrise / sunset in September in Portrane?
On the first day of September in Portrane, sunrise is at 6:34 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:03 pm IST.
Average sea temperature in September
Portrane, Ireland
- Average sea temperature in September: 14.8°C
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight in September
Portrane, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
Portrane, Ireland
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