Weather in January
In Saint Ives, United Kingdom, in January, the average water temperature is 10.4°C (50.7°F). Note: Immersing oneself in 10.4°C (50.7°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped. Weather in January »
Weather in February
In Saint Ives, United Kingdom, the average seawater temperature in February is 10°C (50°F). Note: If planning to swim in 10°C (50°F) under 10°C (50°F), wear a protective suit. Weather in February »
Weather in March
March is the month with the coldest seawater in Saint Ives, United Kingdom, with an average sea temperature of 9.7°C (49.5°F). Note: Dipping into 9.7°C (49.5°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Weather in March »
Weather in April
In Saint Ives, United Kingdom, in April, the average water temperature is 10.6°C (51.1°F). Note: It is advised against swimming in 10.6°C (51.1°F) when it drops below 10°C (50°F). Weather in April »
Weather in May
In Saint Ives, United Kingdom, the average seawater temperature in May is 12°C (53.6°F). Note: Without suitable protection, venturing into 12°C (53.6°F) waters cooler than 10°C (50°F) can lead to pronounced cold shock and rapid breaths. Weather in May »
Weather in June
In Saint Ives, United Kingdom, the average seawater temperature in June is 14.1°C (57.4°F). Note: Swimming in 14.1°C (57.4°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation. Weather in June »
Weather in July
In July, the average sea temperature in Saint Ives, United Kingdom, is 16.4°C (61.5°F). Note: Most individuals do not find swimming at 16.4°C (61.5°F) to be enjoyable. Weather in July »
Weather in August
August is the month with the warmest seawater in Saint Ives, United Kingdom, with an average sea temperature of 17.1°C (62.8°F). Note: For swimming, a surface water temperature of 17.1°C (62.8°F) is not enjoyable for the majority. Weather in August »
Weather in September
In September, the average sea temperature in Saint Ives, United Kingdom, is 16.3°C (61.3°F). Note: Swimming in water at 16.3°C (61.3°F) is not a pleasurable experience for most. Weather in September »
Weather in October
In October, the average sea temperature in Saint Ives, United Kingdom, 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 October »
Weather in November
In Saint Ives, United Kingdom, in November, the average water temperature is 13.3°C (55.9°F). Note: With the appropriate swimsuit, one can swim in 13.3°C (55.9°F) even if temperatures dip below 10°C (50°F); otherwise, be ready for cold shock and breath issues. Weather in November »
Weather in December
In Saint Ives, United Kingdom, the average seawater temperature in December is 11.8°C (53.2°F). Note: Danger awaits those who swim in 11.8°C (53.2°F) without protection. Weather in December »
[Resources]Frequently asked questions
When is the sea coldest in Saint Ives?
The month with the coldest seawater in Saint Ives, United Kingdom, is March, with an average sea temperature of 9.7°C (49.5°F).
When are the longest days in Saint Ives?
The month with the longest days in Saint Ives, United Kingdom, is June, with an average of 16h and 18min of daylight.
What month is the sea warmest in Saint Ives?
The month with the warmest seawater is August, with an average sea temperature of 17.1°C (62.8°F).
When is Daylight Saving Time (DST) in Saint Ives?
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 Ives?
With an average of 8h and 6min of daylight, December has the shortest days of the year in Saint Ives, United Kingdom.
Average sea temperature
Saint Ives, United Kingdom
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).
Average daylight
Saint Ives, United Kingdom
- Average daylight in January:
8h and 4min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 3min - Average daylight in June:
16h and 2min
- Average daylight in July:
15h and 5min - Average daylight in August:
14h and 2min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
9h and 0min - Average daylight in December:
8h and 1min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 6min).
Saint Ives, United Kingdom
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