Portimão weather and climate in 2026
Day
26 °C
Night
17 °C
Sea
18 °C
Precipitation
7 mm
in month
Rainy days
2 days
in month
Daylight
15 hours
average
Sunshine
10 hours
average
Humidity
67 %
Day
26 °C
Night
17 °C
Sea
18 °C
Precipitation
7 mm
in month
Rainy days
2 days
in month
Daylight
15 hours
average
Sunshine
10 hours
average
Humidity
67 %
Overview: Portimão
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Weather overview for Portimão
Weather overview
Portimão, located in southern Portugal's famed Algarve region, is blessed with a Mediterranean climate characterized by mild, wet winters, and warm to hot, dry summers. Average daytime temperatures vary from a pleasant 16.0 degrees in January to toasty 28.9 degrees in July. January is the coolest month with nighttime lows averaging 7.9 degrees, while August nights are the warmest, averaging 18.3 degrees. Precipitation is scant during the summer months, contrasting with the more pluvial periods of November and December, which average roughly 90.8896025 mm of rain. Each month in Portimão offers a unique climate, perfectly suited for the explorative spirit and the appreciative sun-seeker alike.
January weather
January in Portimão welcomes the new year with moderate temperatures; the city enjoys daytime highs around 16 degrees, making it pleasant for leisurely walks along the Praia da Rocha. The chill of the night averages at a cooler 7.9 degrees, and with 8.5562675 wet days in the month, it’s recommended to carry an umbrella. The Atlantic Ocean is quite bracing with an average sea temperature of 15.71287 degrees.
February weather
As February arrives, Portimão sees a subtle increase in daytime temperatures to an average of 16.9 degrees, while nights remain brisk averaging 8.4 degrees. The sea remains relatively cold at around 15.15855 degrees. February experiences slightly fewer rainy days than January, with an average of 7.9389675 wet days, so occasional showers still grace this coastal town.
March weather
March heralds the mild spring in Portimão with warmer days reaching up to 18.9 degrees, which is quite appealing for sightseeing and enjoying the local cafes. Nighttime temperatures average 10.6 degrees. The Atlantic starts to warm up slightly with a sea temperature of about 15.3596 degrees. Rainy days decrease to 6.9404025, signaling the gradual retreat of the winter wetness.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.April weather
April showers bring forth May flowers, and in Portimão, this month is characterized by a further rise in temperatures to a comfortable 20 degrees during the day and 11.4 degrees at night. The sea warms up to an inviting 15.73935 degrees. Rain still makes an appearance, albeit less frequently, registering 7.69017 wet days.
May weather
May in Portimão is simply delightful, with an average maximum temperature of 22.4 degrees, signaling the onset of summer. The evenings are still a bit cool at an average of 13.6 degrees. The sea temperature inches up to 16.61705 degrees. With just 4.89717 rainy days, the likelihood of encountering rain is significantly reduced.
June weather
June in Portimão could be described as the doorway to summer, with day temperatures rising to a warm 26.3 degrees and night temperatures at a comfortable 16.5 degrees. Excursions into the glistening Atlantic are more enticing as sea temperatures reach 18.38991 degrees. Precipitation is rare, with an average of just 1.79069 wet days.
July weather
With the peak of summer arriving in July, Portimão embraces the heat with average daytime highs soaring to a balmy 28.9 degrees. The nights are warm as well, averaging at 18.1 degrees. The ocean calls out to swimmers with an average sea temperature of 19.50137 degrees. Rain is an infrequent visitor with only 0.40882 wet days on average, making it the driest month.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.August weather
August maintains the scorching pace with average highs barely shy of July's at 28.7 degrees. The nights are the warmest of the year averaging 18.3 degrees, providing that perfect balmy summer night feeling. The sea becomes even more welcoming with a temperature of approximately 20.15389 degrees. Rain is still a rare occurrence, with 0.68564 wet days on average.
September weather
September in Portimão signifies the gradual transition from the vibrant summer to the softer tones of autumn. Daytime temperatures remain warm at an average of 26 degrees, while nights begin to cool down to an average of 16.9 degrees. The sea remains warm and inviting at 20.0394 degrees. Rain precipitates into the picture slightly more, averaging 2.8218625 wet days.
October weather
October in Portimão is characterized by cooler yet still mild temperatures averaging 22.8 degrees during the day and 14.6 degrees at night. The warmth of the sea lingers at 19.16738 degrees, extending the swimming season. Rainfall starts to become more frequent with an average of 7.676429999999999 wet days, as the Algarve heads toward the wetter part of the year.
November weather
November in Portimão sees the approach of cooler weather, with averages of 19.2 degrees during the daylight hours and 11.7 degrees when the sun sets. After the long dry spell, the rain becomes more common, with 9.341295000000002 average wet days. The sea temperature begins to drop to 17.89137 degrees, yet remains plausible for the hearty swimmer.
December weather
December in Portimão brings the year full circle with cool daytime averages around 16.9 degrees and nighttime lows averaging 9.4 degrees. The holiday spirit is undampened by the increased frequency of rain, as the month averages 9.71198 wet days. The Atlantic cools to 16.63484 degrees, typically dissuading all but the most determined swimmers.
FAQs
How does the weather feel in Portimão during January, and should I pack a coat?
The January weather in Portimão is gentle compared to northern climates, but you would still need a coat, especially after sunset when the average minimum temperature dips to 7.9 degrees. Layering is key as daytime can feel significantly warmer with ample sunshine.
Is the sea temperature in Portimão warm enough for swimming in February?
Swimming in February might be challenging for the unaccustomed, as the sea temperature hovers around 15.15855 degrees which is quite chilly. It's usually more favorable for the hearty or those in wetsuits.
What kind of outdoor activities are suitable for Portimão's March weather?
March weather in Portimão is fantastic for outdoor activities like hiking along the cliffs of the Algarve coast, or enjoying a round of golf. The warmth during the day, averaging 18.9 degrees, is perfect for spending plenty of time outside.
Should I expect many rainy days in Portimão during April?
April sees an improvement in terms of rainy days, decreasing to an average of 7.69017 days, with sporadic showers. Most days will be sunny, allowing for uninterrupted exploration of the area.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.How often can I expect rain in Portimão during May?
Rain in Portimão during May is quite infrequent, averaging less than 5 wet days for the entire month. It's the perfect time to enjoy mostly sunny skies with very slim chances of precipitation.
Is June in Portimão mostly sunny or should one expect some rainfall?
June in Portimão promises abundant sunshine, reigning over the majority of days. Rainfall is extremely rare this month, with fewer than 2 wet days on average, so it’s a great time to soak up the sun at the beach.
How hot does Portimão get in July and what precautions should sunbathers take?
July in Portimão can get quite hot with an average high of 28.9 degrees, and sunbathers should regularly apply high SPF sunscreen, drink plenty of water, and seek shade during the hottest part of the day to avoid heat exhaustion.
What are the best activities to do during the hot days of August in Portimão?
In August, water-based activities are the best way to enjoy Portimão's heat — think jet-skiing, paddleboarding, or simply cooling off in the delightful 20.15389 degrees of the Atlantic Ocean. Evening beach walks are also magnificent during this time.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.How does the weather begin to change in Portimão in September?
September's weather starts to mellow out in Portimão with daytime still quite warm at 26 degrees, but you'll notice the evenings getting cooler. Rain starts to make a shy comeback, however, the majority of the month remains dry and sunny.
As temperatures begin to drop, what can one expect from Portimão's weather in October?
During October, you can expect somewhat cooler temperatures with comfortable daytime highs and a noticeable transition towards autumn in the evenings. However, the weather remains generally fine, perfect for enjoying the still-warm sea and fewer crowds.
What is the weather typically like in Portimão during November?
Weather in November is distinctly cooler but still quite mild, perfect for exploring Portimão without the summer heat. You can expect more frequent rain showers, so plan for indoor alternatives or wearing a raincoat for outdoor fun.
Is December a good time for outdoor explorations in Portimão?
Outdoor activities in December are still quite pleasant, given the mild temperatures. However, with an increased chance of rain, it’s best to have alternative plans or be prepared with appropriate rain gear.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.