Climate and monthly weather forecast
Weather in January
In Passage West, Ireland, the average seawater temperature in January is 9.8°C (49.6°F). Note: Without suitable protection, venturing into 9.8°C (49.6°F) waters cooler than 10°C (50°F) can lead to pronounced cold shock and rapid breaths. Weather in January »
Weather in February
In February, the average sea temperature in Passage West, Ireland, is 9.5°C (49.1°F). Note: You can swim in 9.5°C (49.1°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. Weather in February »
Weather in March
March is the month with the coldest seawater in Passage West, Ireland, with an average sea temperature of 9.4°C (48.9°F). Note: It is life-risking to swim in 9.4°C (48.9°F). Weather in March »
Weather in April
In Passage West, Ireland, in April, the average water temperature is 10.3°C (50.5°F). Note: You can swim in 10.3°C (50.5°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. Weather in April »
Weather in May
In Passage West, Ireland, the average seawater temperature in May is 11.7°C (53.1°F). Note: Dipping in 11.7°C (53.1°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties. Weather in May »
Weather in June
In Passage West, Ireland, in June, the average water temperature is 13.5°C (56.3°F). Note: With the appropriate swimsuit, one can swim in 13.5°C (56.3°F) even if temperatures dip below 10°C (50°F); otherwise, be ready for cold shock and breath issues. Weather in June »
Weather in July
In July, the average sea temperature in Passage West, Ireland, is 15.8°C (60.4°F). Note: Swimming is not a pleasurable activity for most people when the water temperature is 15.8°C (60.4°F). Weather in July »
Weather in August
The month with the warmest seawater in Passage West, Ireland, is August, with an average sea temperature of 16.4°C (61.5°F). Note: Swimming is not a pleasurable activity for the majority in water at 16.4°C (61.5°F). Weather in August »
Weather in September
In Passage West, Ireland, in September, the average water temperature is 15.7°C (60.3°F). Note: Most people do not take pleasure in swimming in water at 15.7°C (60.3°F). Weather in September »
Weather in October
In Passage West, Ireland, in October, the average water temperature is 14.2°C (57.6°F). Note: Entering waters of 14.2°C (57.6°F) is life-endangering. Weather in October »
Weather in November
In November, the average sea temperature in Passage West, Ireland, is 12.8°C (55°F). Note: With an efficient thermal swimsuit, one can navigate 12.8°C (55°F) even if it's colder than 10°C (50°F); otherwise, rapid cold shock and breathlessness might set in. Weather in November »
Weather in December
In Passage West, Ireland, in December, the average water temperature is 11.2°C (52.2°F). Note: Engaging in a swim in 11.2°C (52.2°F) can threaten life. Weather in December »
Updated: Jan 27, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the month with the coldest sea water in Passage West?
March is the month with the coldest seawater in Passage West, Ireland, with an average sea temperature of 9.4°C (48.9°F).
When are the longest days in Passage West?
June has the longest days of the year in Passage West, with an average of 16h and 36min of daylight.
What is the month with the warmest sea water in Passage West?
With an average sea temperature of 16.4°C (61.5°F), August is the month with the warmest seawater in Passage West.
When is Daylight Saving Time (DST) in Passage West?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from IST to GMT. Daylight Saving Time ends on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to IST.
What is the month with the shortest days in Passage West?
With an average of 7h and 54min of daylight, December has the shortest days of the year in Passage West, Ireland.
Average sea temperature
Passage West, Ireland
The best month for swimming (with the highest average sea temperature) is August (16.4°C).
The coldest month (with the lowest average sea temperature) is March (9.4°C).
Average daylight
Passage West, Ireland
- Average daylight in January:
8h and 2min - Average daylight in February:
10h and 0min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 4min - Average daylight in June:
16h and 4min
- Average daylight in July:
16h and 1min - Average daylight in August:
14h and 4min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
8h and 5min - Average daylight in December:
7h and 5min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
