The air in Cascais in the late afternoon carries a specific kind of magic—a blend of salt spray, sizzling olive oil, and the faint, sweet perfume of wild jasmine. For years, I’ve chased the ghost of the perfect seafood meal here. Not the white-tablecloth, wallet-draining spectacles, but the real stuff. The places where fishermen might eat, where the tremoço is salty, the beer is ice-cold, and the bill sits comfortably under €30.
In 2026, finding an authentic, affordable seafood dinner in Cascais can feel like a treasure hunt. But the treasures are there. If you are looking for the top seafood in Cascais under €30, you need to know where the locals go. Here are seven hidden seafood gems in Cascais for 2026.
1. O Pescador de Cascais: The Old Town Staple
The Best Value Seafood in Cascais Old Town
- Address: Rua das Flores, 20B, Cascais, Portugal
- Hours: Monday – Sunday, 12:00 PM – 10:30 PM
- Average Price: €15 - €22
Hidden in the labyrinthine streets of the Old Town, O Pescador is a temple to honest Portuguese cooking. It’s the quintessential place for peixe grelhado (grilled fish). A perfectly charred Dourada, its skin crisp and salty, will set you back around €18. It’s the best value seafood in Cascais for a classic, no-fuss meal.
2. Mar à Vista: The Surfer’s Secret
Top Casual Seafood Places in Cascais Near the Beach
- Address: Av. Nossa Sra. do Cabo, Cascais, Portugal
- Hours: Tuesday – Sunday, 12:00 PM – 10:00 PM
- Average Price: €7 - €14
Located near Guincho, this is where you go for the most honest, sun-drenched seafood lunch. The Sandes de Polvo (Octopus Sandwich) is legendary at just €7. For a bucket of golden Peixe Frito (fried fish), it’s a steal at €12. This is a hidden seafood gem in Cascais 2026 for those who value flavor over frills.
3. A Tasca do Chico: The Petiscos Paradise
Cheap Seafood Restaurants in Cascais Portugal for Sharing
- Address: Rua do Carvalhal, Cascais, Portugal
- Hours: Daily, 12:00 PM – 11:00 PM
- Average Price: €6 - €16
Located in the heart of the Old Town, this spot has perfected the art of Portuguese petiscos. You can assemble a spectacular meal for under €25. Start with the Salada de Polvo (€9) and the incredible Ameijoas à Bulhão Pato (€11). It’s the best seafood Cascais offers for a social, tapas-style experience.
4. O Chico: The Unlikely Hero
Affordable Seafood Dinner in Cascais for Traditionalists
- Address: Rua do Carvalhal, Cascais, Portugal
- Hours: Monday – Saturday, 12:00 PM – 10:00 PM
- Average Price: €12 - €16
Just a few doors down from A Tasca, this is a traditional marisqueira. The Arroz de Tamboril (monkfish rice) is a must-try, with a half-portion costing around €14. It’s a bastion of affordable seafood in Cascais that offers the full traditional experience.
5. Piri Piri by Peixaria: The Spice Fiend’s Dream
Where to Eat Seafood in Cascais Cheap with a Kick
- Address: Rua do Visconde de Porto, Cascais, Portugal
- Hours: Daily, 12:00 PM – 11:00 PM
- Average Price: €15 - €18
For the top seafood in Cascais under €30 with a spicy kick, head here. The Piri Piri Prawns (Gambas) are phenomenal at €16. It brings a modern, fiery twist to the classic Cascais seafood scene, making it a best value seafood Cascais spot for heat lovers.
6. O Manel: The Fisherman’s Return
Hidden Seafood Gems Cascais 2026: The Local’s Secret
- Address: Rua da Misericórdia, Cascais, Portugal
- Hours: Tuesday – Sunday, 12:00 PM – 10:00 PM
- Average Price: €10 - €16
O Manel is the definition of a local's secret. It feels like you’ve been invited into someone’s dining room. If they have Choco Frito (fried cuttlefish), order it (approx €15). For pure, fresh fish, a simple grilled Sardinha will cost you less than €10. It's the most authentic cheap seafood in Cascais.
7. Café Galeria House of Wonders: The Bohemian Surprise
Casual Seafood Places in Cascais for a Modern Meal
- Address: Rua da Misericórdia, Cascais, Portugal
- Hours: Daily, 10:00 AM – 12:00 AM
- Average Price: €6 - €15
A wildcard for 2026. This bohemian café serves the Burger de Peixe (Fish Burger) for €15 and fantastic Rissóis de Camarão (shrimp croquettes) for just €6. It’s creative, affordable, and reflects the modern energy of the town, offering a unique affordable seafood dinner in Cascais.
Final Thoughts on Eating Well in Cascais in 2026
The soul of Portuguese dining is about abundance and the celebration of the sea. In a town like Cascais, it can be easy to think great seafood has to come with a great bill, but these seven spots prove otherwise. Whether you're looking for the best seafood Cascais Old Town has to offer or a spicy meal near the beach, you can eat incredibly well for under €30. Forget the tourist traps; these are the hidden seafood gems Cascais 2026 is waiting for you to discover.