Helensburgh
United Kingdom
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Helensburgh, United Kingdom

In January, the average sea temperature in Helensburgh, United Kingdom, is 8°C (46.4°F). Note: Swimming in 8°C (46.4°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in January »

In February, the average sea temperature in Helensburgh, United Kingdom, is 7.3°C (45.1°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 February »

The month with the coldest seawater in Helensburgh, United Kingdom, is March, with an average sea temperature of 7.2°C (45°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 Helensburgh, United Kingdom, in April, the average water temperature is 8.1°C (46.6°F). Note: Swimming in 8.1°C (46.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in April »

In Helensburgh, United Kingdom, the average seawater temperature in May is 9.5°C (49.1°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 June, the average sea temperature in Helensburgh, United Kingdom, is 11.4°C (52.5°F). Note: Swimming in 11.4°C (52.5°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 July, the average sea temperature in Helensburgh, United Kingdom, is 13.3°C (55.9°F). Note: Swimming in 13.3°C (55.9°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in July »

August is the month with the warmest seawater in Helensburgh, United Kingdom, with an average sea temperature of 13.8°C (56.8°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 August »

In September, the average sea temperature in Helensburgh, United Kingdom, is 13.7°C (56.7°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 September »

In October, the average sea temperature in Helensburgh, United Kingdom, is 12.8°C (55°F). Note: Swimming in 12.8°C (55°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 Helensburgh, United Kingdom, in November, the average water temperature is 11.7°C (53.1°F). Note: Swimming in 11.7°C (53.1°F) is considered life-threatening. Weather in November »

In Helensburgh, United Kingdom, the average seawater temperature in December is 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 December »

When is the sea coldest in Helensburgh?

March is the month with the coldest seawater, with an average sea temperature of 7.2°C (45°F).

When are the longest days in Helensburgh?

With an average of 17.5h of daylight, June has the longest days of the year in Helensburgh.

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

With an average sea temperature of 13.8°C (56.8°F), August is the month with the warmest seawater in Helensburgh.

What is the month with the shortest days in Helensburgh?

December has the shortest days of the year, with an average of 7.1h of daylight.
Average sea temperature - Helensburgh, United Kingdom

The best month for swimming (with the highest average sea temperature) is August (13.8°C).
The coldest month (with the lowest average sea temperature) is March (7.2°C).

Average daylight - Helensburgh, United Kingdom

The month with the longest days is June (Average daylight: 17.5h).
The month with shortest days is December (Average daylight: 7.1h).