May weather forecast
Vilamoura, Portugal

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The beautiful brown sandy beach behind the scenic city of Vilamoura in Portugal
The beautiful brown sandy beach behind the scenic city of Vilamoura in Portugal

Weather in May

May marks the true arrival of spring with distinctive warming trends and reduced rainfall. Larger amounts of sunshine and the extension of daylight hours cater to long sunny afternoons and gentle evenings. Weather patterns change from April to May with a significant decrease in rainfall, marking the onset of the dry season in Vilamoura, Portugal. The temperature fluctuates from 12°C (53.6°F) at night to balmy highs of 22°C (71.6°F) during the day. With the UV Index ticking up to 8, it is a clear signal that the sun’s intensity is building up, suggesting careful planning for outdoor activities.

Temperature

May comes with a subtle rise, with the average high-temperature adjusting from a comfortable 19°C (66.2°F) in April to an agreeable 22°C (71.6°F). An average low-temperature of 12°C (53.6°F) is noted in Vilamoura during the month of May.

Rainfall

In Vilamoura, in May, it is raining for 5 days, with typically 29mm (1.14") of accumulated precipitation. In Vilamoura, during the entire year, the rain falls for 77 days and collects up to 557mm (21.93") of precipitation.

Sea temperature

In May, the average sea temperature in Vilamoura is 17°C (62.6°F).
Note: Swimming is not an enjoyable activity for the majority when the water is at 17°C (62.6°F). The difficulty of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

In May, the average length of the day is 14h and 10min.
On the first day of the month, sunrise is at 06:37 and sunset at 20:21. On the last day of May, in Vilamoura, sunrise is at 06:14 and sunset at 20:46 WEST.

Sunshine

The average sunshine in May in Vilamoura, Portugal, is 10h.

UV index

In May, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for the average person.
Note: An average UV index of 8 in May transforms into this advice:
Without proper safety measures, skin and eyes can be quickly harmed. Be sure to protect yourself. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

Frequently asked questions

What is the usual temperature for Vilamoura in May?

The high-temperature, in May, in Vilamoura, is 22°C (71.6°F), while the low-temperature averages to 12°C (53.6°F).

How much does it rain in Vilamoura in May?

In Vilamoura, during May, the rain falls for 5 days and regularly aggregates up to 29mm (1.14") of precipitation.

What is the sea water temperature in May in Vilamoura?

In May, the average sea temperature in Vilamoura, Portugal, is 17°C (62.6°F). Swimming in 17°C (62.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Vilamoura have in May?

In Vilamoura, the average day length in May is 14h and 10min.

When is the sunrise / sunset in May in Vilamoura?

On the first day of May in Vilamoura, sunrise is at 06:37 and sunset at 20:21. On the last day of the month, sunrise is at 06:14 and sunset at 20:46 WEST.

How long on average sun shines in May in Vilamoura?

The average sunshine duration in May is 10h.

How high is the UV index in May in Vilamoura?

In Vilamoura, the average daily maximum UV index in May is 8. A UV Index reading of 8 to 10 represents a very high health threat from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in May
Vilamoura, Portugal

Average temperature in May - Vilamoura, Portugal
  • Average high temperature in May: 22°C

The warmest months (with the highest average high temperature) are July and August (28°C).
The months with the lowest average high temperature are January, February and December (16°C).

  • Average low temperature in May: 12°C

The months with the highest average low temperature are July, August and September (17°C).
The coldest months (with the lowest average low temperature) are January and February (8°C).

Average rainfall in May
Vilamoura, Portugal

Average rainfall in May - Vilamoura, Portugal
  • Average rainfall in May: 29mm

The wettest month (with the highest rainfall) is December (100mm).
The driest months (with the least rainfall) are July and August (2mm).

Average rainfall days in May
Vilamoura, Portugal

Average rainfall days in May - Vilamoura, Portugal
  • Average rainfall days in May: 5 days

The month with the highest number of rainy days is December (12 days).
The months with the least rainy days are July and August (1 days).

Average sea temperature in May
Vilamoura, Portugal

Average sea temperature in May - Vilamoura, Portugal
  • Average sea temperature in May: 17°C

The best months for swimming (with the highest average sea temperature) are August and September (21°C).
The coldest month (with the lowest average sea temperature) is February (15°C).

Average daylight in May /
Average sunshine in May
Vilamoura, Portugal

Average daylight in May / Average sunshine in May - Vilamoura, Portugal
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in May: 10h

The month with the most sunshine is July (Average sunshine: 12h).
The months with the least sunshine are January and December (Average sunshine: 5h).

Average UV index in May
Vilamoura, Portugal

Average UV index in May - Vilamoura, Portugal
  • Average UV index in May: 8

The months with the highest UV index are June, July and August (UV index 9).
The months with the lowest UV index are January and December (UV index 2).

Vilamoura, Portugal

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