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Weather in Portimão for May 2026

Your guide to Portimão weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Portimão at the beginning of May is 21.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.4 °C by the end of May.

    • Rain 🌧️

  • With an average of 4 rainy days, Portimão experiences minimal rainfall in May.

    • More

  • Is May a good time to visit Portimão? check out the best time to travel to Portimão page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/13°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
67 %
Avg humidity

Portimão Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
22°
2
Overcast
21°
3
Sunny
21°
4
Sunny
22°
5
Patchy rain possible
21°
6
Moderate rain at times
22°
7
Sunny
23°
8
Sunny
24°
9
Overcast
23°
10
Overcast
23°
11
Sunny
24°
12
Partly cloudy
24°
13
Sunny
23°
14
Partly cloudy
22°
15
Partly cloudy
22°
16
Overcast
22°
17
Patchy rain possible
22°
18
Sunny
22°
19
Patchy rain possible
22°
20
Sunny
23°
21
Sunny
23°
22
Sunny
22°
23
Sunny
24°
24
Sunny
22°
25
Patchy rain possible
25°
26
Sunny
25°
27
Sunny
24°
28
Sunny
25°
29
Sunny
26°
30
Sunny
27°
31
Moderate rain at times
26°

Temperatures trend during May in Portimão

See the weather trend as well as the moving average line

May weather in Portimão day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Patchy rain possible
Patchy rain possible
 22° /12° 0.2 mm 5
2 May Overcast
Overcast
 21° /13° 2.1 mm 5
3 May Sunny
Sunny
 21° /13° 0.8 mm 5
4 May Sunny
Sunny
 22° /12° 0.1 mm 6
5 May Patchy rain possible
Patchy rain possible
 21° /13° 0.2 mm 5
6 May Moderate rain at times
Moderate rain at times
 22° /13° 0.5 mm 5
7 May Sunny
Sunny
 23° /11° 0 mm 6
8 May Sunny
Sunny
 24° /13° 0.3 mm 6
9 May Overcast
Overcast
 23° /14° 0 mm 5
10 May Overcast
Overcast
 23° /13° 0 mm 6
11 May Sunny
Sunny
 24° /12° 0 mm 6
12 May Partly cloudy
Partly cloudy
 24° /12° 0 mm 6
13 May Sunny
Sunny
 23° /13° 0 mm 6
14 May Partly cloudy
Partly cloudy
 22° /12° 0 mm 6
15 May Partly cloudy
Partly cloudy
 22° /12° 0 mm 6
16 May Overcast
Overcast
 22° /12° 0.1 mm 5
17 May Patchy rain possible
Patchy rain possible
 22° /14° 0.1 mm 5
18 May Sunny
Sunny
 22° /12° 0 mm 6
19 May Patchy rain possible
Patchy rain possible
 22° /12° 0 mm 5
20 May Sunny
Sunny
 23° /12° 0 mm 6
21 May Sunny
Sunny
 23° /13° 1.2 mm 6
22 May Sunny
Sunny
 22° /12° 2.6 mm 6
23 May Sunny
Sunny
 24° /12° 1 mm 6
24 May Sunny
Sunny
 22° /14° 0.3 mm 6
25 May Patchy rain possible
Patchy rain possible
 25° /14° 0.1 mm 6
26 May Sunny
Sunny
 25° /14° 0 mm 7
27 May Sunny
Sunny
 24° /13° 0.3 mm 6
28 May Sunny
Sunny
 25° /14° 0 mm 6
29 May Sunny
Sunny
 26° /16° 0.1 mm 6
30 May Sunny
Sunny
 27° /16° 0 mm 7
31 May Moderate rain at times
Moderate rain at times
 26° /16° 0.2 mm 6
Next
Important Notice
Our weather forecast for Portimão in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Portimão forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Portimão weather in May vs April vs June

Compare May weather in Portimão with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AprilMayJune
WeatherSunny
Sunny
Sunny
Sunny
Sunny
Sunny
Temperatures21°/12°23°/13°26°/16°
Rainfall31 mm10 mm10 mm
Wind22.7 km/h23.9 km/h22.7 km/h
Humidity69%67%67%
Rainy days10 days4 days4 days
Dry days20 days27 days26 days

Planning a trip to Portimão? Discover the best time to visit

Portimão in May - FAQ

What are the expected maximum and minimum temperatures in Portimão during May?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Portimão during May?
Expect minimal rainfall in Portimão during May, with a total of 10.1 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Portimão during May?
The average wind speed in Portimão during May is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

Portimão water temperatures in May

The average water temperature of the Atlantic Ocean near Portimão in May is 16.4 °C. Temperatures remain fairly consistent throughout the month.

What is the water temperature in Portimão in May?
The average water temperature in Portimão in May is 16.4 °C.
Can you swim in Portimão in May?
Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.

What to pack to Portimão in May?

As you prepare for your trip to Portimão in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Portimão, during May, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather

May rainfall patterns in Portimão

Explore the daily rainfall trends and prepare for Portimãos May weather 💧

UV exposure in Portimão during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

Quick links

More Portimão weather pages
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Location coordinates Where is Portimão?

Get accurate weather forecasts for Portimão, located at latitude 37.139 and longitude -8.538. Stay updated with localized weather information tailored for Portimão.

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