Portsmouth
United Kingdom
Long-term weather forecast
Long-term weather forecast

March weather forecast and climate
Portsmouth, United Kingdom

March, the first month of the spring, in Portsmouth, is a cool month, with average temperature fluctuating between 4.5°C (40.1°F) and 10.5°C (50.9°F).

Temperature

In Portsmouth, United Kingdom, the average high-temperature is essentially the same as in February - a fresh 10.5°C (50.9°F). The average low-temperature, in Portsmouth, United Kingdom, is 4.5°C (40.1°F).

Rainfall

In Portsmouth, United Kingdom, during March, the rain falls for 8.3 days and regularly aggregates up to 51.6mm (2") of precipitation. In Portsmouth, during the entire year, the rain falls for 103.4 days and collects up to 699mm (27.5") of precipitation.

Sea temperature

March is the month with the coldest seawater in Portsmouth, with an average sea temperature of 8.6°C (47.5°F).
Note: Swimming in 8.6°C (47.5°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.

Daylight

In Portsmouth, the average length of the day in March is 11.9h.

Sunshine

The average sunshine in March is 4.3h.

UV index

In Portsmouth, the average daily maximum UV index in March is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in March in Portsmouth?

The average high-temperature, in March, in Portsmouth, is 10.5°C (50.9°F), while the average low-temperature is 4.5°C (40.1°F).

How much does it rain in Portsmouth in March?

In Portsmouth, in March, during 8.3 rainfall days, 51.6mm (2") of precipitation is typically accumulated.

What month is the sea coldest in Portsmouth?

The month with the coldest seawater is March, with an average sea temperature of 8.6°C (47.5°F).

What is the sea water temperature in March in Portsmouth?

In Portsmouth, United Kingdom, in March, the average water temperature is 8.6°C (47.5°F). 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. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Portsmouth have in March?

In March, the average length of the day in Portsmouth, United Kingdom, is 11.9h.

How many hours of sunshine does Portsmouth have in March?

In March, the average sunshine in Portsmouth is 4.3h.

What is the UV index intensity in March in Portsmouth?

The average daily maximum UV index in March in Portsmouth is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.
Average temperature in March - Portsmouth, United Kingdom
  • Average high temperature in March: 10.5°C

Warmest months (with the highest average high temperature) are July and August (21.4°C).
Months with the lowest average high temperature are January and February (8.2°C).

  • Average low temperature in March: 4.5°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).

Average rainfall in March - Portsmouth, United Kingdom
  • Average rainfall in March: 51.6mm

The wettest month (with the highest rainfall) is October (86.2mm).
The driest month (with the lowest rainfall) is June (42mm).

Average rainfall days in March - Portsmouth, United Kingdom
  • Average rainfall days in March: 8.3 days

Months with the highest number of rainy days are January and December (11.2 days).
The month with the lowest number of rainy days is July (5.4 days).

Average sea temperature in March - Portsmouth, United Kingdom
  • Average sea temperature in March: 8.6°C

The best month for swimming (with the highest average sea temperature) is September (17.3°C).
The coldest month (with the lowest average sea temperature) is March (8.6°C).

Average daylight in March / Average sunshine in March - Portsmouth, United Kingdom
  • Average daylight in March: 11.9h

The month with the longest days is June (Average daylight: 16.4h).
The month with shortest days is December (Average daylight: 8h).

  • Average sunshine in March: 4.3h

The month with most sunshine is July (Average sunshine: 8.4h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in March - Portsmouth, United Kingdom
  • Average UV index in March: 3

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).