Weather in January
In Saint David's, United Kingdom, in January, the average water temperature is 9.3°C (48.7°F). Note: Entering waters of 9.3°C (48.7°F) is life-endangering. Weather in January »
Weather in February
In February, the average sea temperature in Saint David's, United Kingdom, is 8.9°C (48°F). Note: Danger awaits those who swim in 8.9°C (48°F) without protection. Weather in February »
Weather in March
March is the month with the coldest seawater in Saint David's, United Kingdom, with an average sea temperature of 8.7°C (47.7°F). Note: Swimming in 8.7°C (47.7°F) feels unbearing at 13°C (55.4°F) and can be life-risking below 10°C (50°F), causing breathing issues and cold shock, depending on a person's capacity. Weather in March »
Weather in April
In Saint David's, United Kingdom, the average seawater temperature in April is 9.8°C (49.6°F). Note: Dipping into 9.8°C (49.6°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Weather in April »
Weather in May
In Saint David's, United Kingdom, in May, the average water temperature is 11.1°C (52°F). Note: Swimming in 11.1°C (52°F) feels unbearing at 13°C (55.4°F) and can be life-risking below 10°C (50°F), causing breathing issues and cold shock, depending on a person's capacity. Weather in May »
Weather in June
In Saint David's, United Kingdom, the average seawater temperature in June is 13.3°C (55.9°F). Note: Danger awaits those who swim in 13.3°C (55.9°F) without protection. Weather in June »
Weather in July
In Saint David's, United Kingdom, in July, the average water temperature is 15.3°C (59.5°F). Note: The majority of individuals do not enjoy swimming in water that is 15.3°C (59.5°F). Weather in July »
Weather in August
With an average sea temperature of 16.2°C (61.2°F), August is the month with the warmest seawater in Saint David's, United Kingdom. Note: Most people find swimming in 16.2°C (61.2°F) to be not enjoyable. Weather in August »
Weather in September
In September, the average sea temperature in Saint David's, United Kingdom, is 15.8°C (60.4°F). Note: Most individuals do not find swimming at 15.8°C (60.4°F) to be enjoyable. Weather in September »
Weather in October
In Saint David's, United Kingdom, in October, the average water temperature is 14.7°C (58.5°F). Note: Engaging in a swim in 14.7°C (58.5°F) can threaten life. Weather in October »
Weather in November
In Saint David's, United Kingdom, in November, the average water temperature is 13.4°C (56.1°F). Note: Diving into 13.4°C (56.1°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Weather in November »
Weather in December
In Saint David's, United Kingdom, the average seawater temperature in December is 11.4°C (52.5°F). Note: You can swim in 11.4°C (52.5°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. Weather in December »
[Resources]Frequently asked questions
What is the month with the coldest sea water in Saint David's?
March is the month with the coldest seawater in Saint David's, United Kingdom, with an average sea temperature of 8.7°C (47.7°F).
When are the longest days in Saint David's?
The month with the longest days is June, with an average of 16h and 36min of daylight.
What is the month with the warmest sea water in Saint David's?
With an average sea temperature of 16.2°C (61.2°F), August is the month with the warmest seawater.
When is Daylight Saving Time (DST) in Saint David's?
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
What is the month with the shortest days in Saint David's?
December has the shortest days of the year in Saint David's, with an average of 7h and 54min of daylight.
Average sea temperature
Saint David's, United Kingdom
The best month for swimming (with the highest average sea temperature) is August (16.2°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).
Average daylight
Saint David's, United Kingdom
- 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).
Saint David's, United Kingdom
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