SeaEO Tours dolphin watching from Lisbon

SeaEO Tours takes you to find wild dolphins, starting from a marina in central Lisbon. The boat is a semi-rígido, a rigid inflatable boat (RIB): low to the water, fast and open. You leave from Doca de Santo Amaro, right by the 25 de Abril bridge, run down the Tagus past Belém and head out to where the river meets the Atlantic. SeaEO says three kinds of dolphin are found near Lisbon: the bottlenose dolphin (golfinho-roaz), the common dolphin and the striped dolphin.

Groups are small and there are two crew, including a certified guide who is also a marine biologist. They explain what the dolphins are doing and why, and on the way back they stop to point out Lisbon’s main monuments from the water. Commentary is available in Portuguese, English, French, Italian and Spanish. Sometimes the crew make a quick stop to pick rubbish out of the water.

SeaEO calls the trip an ocean safari, because nothing is guaranteed. It publishes its yearly success rates, though, and they are high: dolphins were seen on 95% of trips in 2020 and 2022, 96% in 2021, 97% in 2023 and 2025, and 98% in 2024. Some reviews on its page describe finding dolphins while still in the estuary, only minutes after leaving.

Dolphins are seen all year, but SeaEO says the best season runs from early spring to late autumn. Other animals turn up now and then. The crew list whales, sea turtles, sharks, orcas and sunfish as possible sightings, along with the seabirds that usually gather near dolphins and whales.

How close you get depends on the dolphins. Bottlenose dolphins often jump in front of the boat, and common dolphins are curious and come to investigate. The crew follow a code of conduct: the dolphins are never fed, nobody gets in the water with them and the boat tries not to interfere.

This is a lively trip. The RIB runs in the open sea with some swell, and you are exposed to wind, spray and sun for up to three hours. SeaEO doesn’t accept bookings for children under five, and its FAQ says RIBs are not recommended for children under four, pregnant women or anyone with serious back or neck problems. For a child of five to seven, think about stamina: three hours is a long time to sit still in a life jacket.

Children who love speed usually find the boat half the fun. Children prone to seasickness may struggle. The crew’s advice is to avoid alcohol the day before (for the adults), eat a good breakfast without milk or yoghurt, sleep well and bring a travel-sickness band or tablets just in case.

A review quoted on SeaEO’s own page says there’s no toilet on board, but there are toilets at the dock to use before you leave. Plan for that with younger children.

When we checked, tickets cost €65 for adults and €50 for children aged 5 to 11. The price includes the guided trip with a marine biologist, two crew, a life jacket and insurance. Trips run at 9:30 to 12:30 and 14:00 to 17:00, and the crew send a message the day before with exact details.

Each trip needs at least six people. If numbers fall short, SeaEO tries to move you to another time or to a partner operator near Lisbon. It recommends booking ahead because trips often sell out. You can cancel a shared trip for a full refund up to 24 hours before; after that, or if you don’t turn up, you pay in full.

All trips depend on the weather and sea. If a trip is going to be cancelled, SeaEO contacts you up to 24 hours ahead to rebook. Fog can cancel a morning trip at short notice. If there’s no other date that works, you get your money back.

SeaEO also runs birdwatching trips, sunset trips and private charters. A private boat is the option if you want to swim in the sea, since the dolphin trip doesn’t include swimming.

Bring warm clothes even on a hot day, because a fast boat on the ocean is cold. Add sunglasses, sun cream and a charged camera. You don’t need to be able to swim; everyone wears a life jacket, and there are children’s sizes. Arrive 15 minutes early for the safety briefing.

Doca de Santo Amaro is lined with restaurants in old warehouses. Doca de Santo is a family-friendly option for lunch after a morning trip. The MAAT and Central Tejo power station museum is a short walk along the river towards Belém. Other dolphin trips near Lisbon include the Sado estuary trips from Setúbal and the Batnavó trips from Sesimbra. For a guaranteed sighting of sea creatures on a rough day, the Oceanário is across town.

What is the minimum age for dolphin watching in Lisbon with SeaEO?

Five. SeaEO does not take bookings for children under five, and doesn’t recommend its RIBs for children under four.

How long does the trip take?

Up to three hours, leaving at 9:30 or 14:00.

Is there a toilet on the boat?

A customer review on SeaEO’s page says no, but there are toilets at the dock. Go before you board.

Can we swim with the dolphins?

No. Swimming with wild animals isn’t allowed, and the dolphins are never fed.

What happens if the weather is bad?

SeaEO contacts you up to 24 hours before to rebook, and refunds you in full if no other date works. Fog can cancel a trip at the last minute.