Sesimbra is a delightful traditional beach resort tucked beneath the hills of the Arrábida Natural Park, and one of my favourite beach towns close to Lisbon. It is a destination adored by the Portuguese, who are drawn to its glorious sandy bay, exceptional seafood restaurants and picturesque scenery.

The town enjoys a Mediterranean climate, featuring hot, dry summers and mild but unpredictable winters. The hills of the Arrábida shelter the coastline from the worst of the Atlantic winds, giving Sesimbra one of the calmest beaches in the Lisbon region. The weather is reliably fine for heading to the beach from mid-May until the end of September.

The peak months are July and August, when the town is packed and the famous beaches of Portinho da Arrábida are unreachable. I have been turned away from Praia do Creiro beach at 10am because the car park was full, and later found out that every car parked illegally that day received a ticket.

For most visitors, the best months to visit Sesimbra are June and September. My personal favourite is June. The weather is warm and settled, the beaches are uncrowded on weekdays, and the seafood restaurants along the backstreets are at their best without the long waits of peak summer.

Spring and autumn are particularly well suited for exploring the wider region. The spectacular coastline of the Arrábida Natural Park is wonderful for kayaking and hiking, and the milder temperatures make day trips to Cabo Espichel and Portinho da Arrábida far more enjoyable than in the summer heat. Some of my best memories are from a calm May day kayaking the western coastline with my brother and his family.

Winter months (November through March) bring cooler conditions and the weather becomes unpredictable, with grey wet days mixed in with bright sunny spells. Sesimbra goes quiet in the winter, but it is as much a working fishing town as a tourist resort, and its sizeable permanent population keeps the seafood restaurants, cafés and shops open year-round.

I have been visiting Sesimbra for over 23 years, introduced to the town by my Portuguese wife's family, who have been coming here since they were children. I now live in nearby Lisbon, so Sesimbra is a regular day trip for us. This guide will help you identify the ideal time for your visit, and what to expect from each season.
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Sesimbra enjoys a Mediterranean climate similar to nearby Lisbon, though the sheltering hills of the Arrábida Natural Park give the town a notably calmer and more settled feel than other beaches along the Lisbon coastline. The region boasts over 2,500 hours of sunshine per year, with the summer months delivering reliably hot, bright days.

Summers are hot and dry, with July and August seeing average high temperatures of 28°C (82°F) to 30°C (86°F). Official statistics never really tell the true story of what it feels like, as they measure air temperature in the shade. Lying on Sesimbra's south-facing beach in the midday August sun, it will feel significantly hotter than 28°C. During these peak months, rainfall is virtually non-existent and visitors can expect over 11 hours of sunshine daily.

Sesimbra Portugal Centigrade and Fahrenheit Temperature Chart

During summer evenings there is often a refreshing breeze, but once the wind drops later at night, the humidity can make it feel like the temperature has risen. In the summer you will want air conditioning, though I don't have it in my flat in Lisbon and it is manageable.

Spring (April to May) and autumn (September to October) offer pleasant conditions with temperatures ranging from 18°C (64°F) to 24°C (75°F). These are wonderful months for exploring the wider region, with the spectacular Arrábida coastline at its best for kayaking and hiking in the milder temperatures. The one month to be aware of is April, which can be surprisingly wet, by mid-May the weather dries out and the fine days settle in reliably.

Sesimbra sunshine hours plotted against maximum temperature

Rain in Sesimbra is highly seasonal. From June through August, rainfall is almost non-existent, often recording less than 5mm per month. The wet season begins in late October and peaks through November, December and January, with rain arriving in heavy Atlantic fronts rather than lingering drizzle. Between the wet spells there are often stretches of bright, clear weather, and the average of 5 hours of sunshine per day even in the winter months is better than most European cities at that time of year.

Winter brings mild daytime temperatures of 15°C (59°F) to 17°C (63°F), though the damp sea air always makes it feel cooler than the numbers suggest, especially if a breeze is blowing. Nights can drop to around 8°C (46°F).

Sesimbra goes quiet in the low season, but it is as much a working fishing town as a tourist resort, and its sizeable permanent population keeps the seafood restaurants, cafés and shops open year-round.

Sesimbra rainfall chart

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