Weather in January
In Saint-Cast-le-Guildo, France, in January, the average water temperature is 9°C (48.2°F). Note: Swimming at temperatures less than 10°C (50°F) in 9°C (48.2°F) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. Weather in January »
Weather in February
With an average sea temperature of 8.7°C (47.7°F), February is the month with the coldest seawater in Saint-Cast-le-Guildo, France. Note: To swim in 8.7°C (47.7°F) at less than 10°C (50°F), ensure you're well-protected. Weather in February »
Weather in March
In Saint-Cast-le-Guildo, France, in March, the average water temperature is 8.8°C (47.8°F). Note: Caution: 8.8°C (47.8°F) temperatures below 10°C (50°F) during swimming can result in intense cold shock and quickened breathing. Weather in March »
Weather in April
In Saint-Cast-le-Guildo, France, the average seawater temperature in April is 10.4°C (50.7°F). Note: Entering waters of 10.4°C (50.7°F) is life-endangering. Weather in April »
Weather in May
In May, the average sea temperature in Saint-Cast-le-Guildo, France, is 12.6°C (54.7°F). Note: Swimming in 12.6°C (54.7°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina. Weather in May »
Weather in June
In June, the average sea temperature in Saint-Cast-le-Guildo, France, is 14.8°C (58.6°F). Note: Swimming in 14.8°C (58.6°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Weather in June »
Weather in July
In Saint-Cast-le-Guildo, France, the average seawater temperature in July is 16.4°C (61.5°F). Note: For most people, a water temperature of 16.4°C (61.5°F) is not conducive to enjoyable swimming. Weather in July »
Weather in August
In August, the average sea temperature in Saint-Cast-le-Guildo, France, is 18°C (64.4°F). Note: For most individuals, swimming in 18°C (64.4°F) is not enjoyable. Weather in August »
Weather in September
With an average sea temperature of 18.2°C (64.8°F), September is the month with the warmest seawater in Saint-Cast-le-Guildo, France. Note: The majority find it unenjoyable to swim in 18.2°C (64.8°F). Weather in September »
Weather in October
In Saint-Cast-le-Guildo, France, in October, the average water temperature is 16.8°C (62.2°F). Note: Swimming is not a pleasurable activity for most people when the water temperature is 16.8°C (62.2°F). Weather in October »
Weather in November
In Saint-Cast-le-Guildo, France, in November, the average water temperature is 14.8°C (58.6°F). Note: Immersing oneself in 14.8°C (58.6°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped. Weather in November »
Weather in December
In Saint-Cast-le-Guildo, France, the average seawater temperature in December is 11.9°C (53.4°F). Note: Swimming in 11.9°C (53.4°F) is deemed hazardous. Weather in December »
[Resources]Frequently asked questions
What month is the sea coldest in Saint-Cast-le-Guildo?
With an average sea temperature of 8.7°C (47.7°F), February is the month with the coldest seawater.
When are the longest days in Saint-Cast-le-Guildo?
With an average of 16h and 6min of daylight, June has the longest days of the year in Saint-Cast-le-Guildo, France.
When is the sea warmest in Saint-Cast-le-Guildo?
September is the month with the warmest seawater in Saint-Cast-le-Guildo, with an average sea temperature of 18.2°C (64.8°F).
When is Daylight Saving Time (DST) in Saint-Cast-le-Guildo?
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Saint-Cast-le-Guildo, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
What is the month with the shortest days in Saint-Cast-le-Guildo?
December has the shortest days of the year in Saint-Cast-le-Guildo, with an average of 8h and 24min of daylight.
Average sea temperature
Saint-Cast-le-Guildo, France
The best month for swimming (with the highest average sea temperature) is September (18.2°C).
The coldest month (with the lowest average sea temperature) is February (8.7°C).
Average daylight
Saint-Cast-le-Guildo, France
- Average daylight in January:
8h and 5min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 2min - Average daylight in June:
16h and 1min
- Average daylight in July:
15h and 4min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 1min - Average daylight in December:
8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
Saint-Cast-le-Guildo, France
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