Sennen
United Kingdom
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Sennen, United Kingdom

In Sennen, United Kingdom, the average seawater temperature in January is 10.4°C (50.7°F). Note: Swimming in 10.4°C (50.7°F) is considered life-threatening. Weather in January »
In Sennen, United Kingdom, in February, the average water temperature is 10°C (50°F). Note: Swimming in 10°C (50°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in February »

March is the month with the coldest seawater in Sennen, United Kingdom, with an average sea temperature of 9.7°C (49.5°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in March »

In Sennen, United Kingdom, the average seawater temperature in April is 10.7°C (51.3°F). Note: Swimming in 10.7°C (51.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in April »

In Sennen, United Kingdom, in May, the average water temperature is 12°C (53.6°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in May »

In Sennen, United Kingdom, the average seawater temperature in June is 14.2°C (57.6°F). Note: Swimming in 14.2°C (57.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in June »

In Sennen, United Kingdom, in July, the average water temperature is 16.6°C (61.9°F). Note: For swimming, a surface water temperature of 16.6°C (61.9°F) is not enjoyable for the majority. Weather in July »

The month with the warmest seawater in Sennen, United Kingdom, is August, with an average sea temperature of 17.1°C (62.8°F). Note: For most, swimming in 17.1°C (62.8°F) is not an enjoyable activity. Weather in August »

In September, the average sea temperature in Sennen, United Kingdom, is 16.5°C (61.7°F). Note: For swimming, a surface water temperature of 16.5°C (61.7°F) is not enjoyable for the majority. Weather in September »

In Sennen, United Kingdom, the average seawater temperature in October is 14.8°C (58.6°F). Note: Swimming in 14.8°C (58.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in October »

In November, the average sea temperature in Sennen, United Kingdom, is 13.3°C (55.9°F). Note: Swimming in 13.3°C (55.9°F) is considered life-threatening. Weather in November »

In December, the average sea temperature in Sennen, United Kingdom, is 11.8°C (53.2°F). Note: Swimming in 11.8°C (53.2°F) is considered life-threatening. Weather in December »

What is the month with the coldest sea water in Sennen?

With an average sea temperature of 9.7°C (49.5°F), March is the month with the coldest seawater.

When are the longest days in Sennen?

The month with the longest days in Sennen is June, with an average of 16.3h of daylight.

What is the month with the warmest sea water in Sennen?

The month with the warmest seawater is August, with an average sea temperature of 17.1°C (62.8°F).

What is the month with the shortest days in Sennen?

The month with the shortest days in Sennen is December, with an average of 8.2h of daylight.
Average sea temperature - Sennen, 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 - Sennen, United Kingdom

The month with the longest days is June (Average daylight: 16.3h).
The month with shortest days is December (Average daylight: 8.2h).