Two areas: Oosterschelde and Westerschelde
When people talk about "seals in Zeeland" they're really talking about two different habitats. The Oosterschelde, since the storm-surge barrier was built, is a largely salt, protected inland water with a strong tide but no high sea swell. The Westerschelde is a true estuary: still openly connected to the North Sea, with strong currents and a gradient from salt to fresh towards Antwerp. Both are Natura 2000 and form part of the Nationaal Park Oosterschelde / the protected Westerschelde estuary.
The Delta's seal population has grown sharply since the 1990s. The common seal in particular has done well here, and over the past few years the grey seal too has become a regular sight in both basins. Counts are carried out by Rijkswaterstaat and research institutes. The Oosterschelde holds several hundred common seals, and the Westerschelde a comparable number.
Spots along the Oosterschelde
The Oosterschelde is rimmed with dykes, and those dykes are exactly where — at low tide and with binoculars — the watching is best. A few proven spots:
- Bruinisse (municipality of Schouwen-Duiveland) — from the marina and the adjacent dyke you can see mud flats where seals rest. Bruinisse is also a departure point for boat trips.
- Wemeldinge — the old pier and the adjacent dyke give views of the mud flat on the opposite side of the Kanaal door Zuid-Beveland. Easy to reach by car.
- Yerseke — famous for mussels, but the harbour mouth often shows animals too, especially at ebb. Combine with a visit to the oyster pits.
- Sint-Annaland (Tholen) — the dyke east of the village looks out over the Krabbenkreek and the sandbanks that emerge at low tide. One of the quieter spots.
- Roggenplaat — a large sandbar opposite Schouwen that was raised in a major project in 2019, precisely to keep functioning as a haul-out. Visible from the storm-surge barrier and on boat trips.
Spots along the Westerschelde
The Westerschelde is longer, narrower and has a strong current. Seals here often haul out on the mud flats at Saeftinghe and Hoofdplaat. The best mainland spots:
- Vlissingen Boulevard — the Boulevard Bankert / Evertsen looks directly out over the estuary mouth; in good conditions you see seals in the water or at the ends of the beach. Boat trips leave from the quayside.
- Hoofdplaat (Zeeuws-Vlaanderen) — a quiet village with a dyke and small beach, looking out over the mouth. Popular with birders and seal-watchers.
- Breskens — a fishing port with sightings just outside the harbour mouth; combine with the ferry connection to Vlissingen.
- Ellewoutsdijk — a small dyke spot on the north bank with views over the Schelde; at low tide you also see mud flats on the Flemish side.
- Saeftinghe — the "drowned land" on the Belgian border, accessible only with a guide. Especially interesting for nature lovers looking for more than just seals.
Boat trips
The Delta has a number of seal-watching operators:
- Vlissingen — trips across the Westerschelde, with good chances of common seals and harbour porpoises.
- Bruinisse — Oosterschelde trips, often combined with the storm-surge barrier and the Roggenplaat.
- Sint-Annaland and Zierikzee — smaller trips covering the northern part of the Oosterschelde.
Prices are in the same range as on the Wadden: €20–35 for a two- to three-hour trip. Book ahead in high season, and ideally choose an operator that states explicitly how far they keep from the animals.
How it differs from the Waddenzee
The Delta is smaller than the Waddenzee in almost every way, and that has practical consequences for spotting:
- Smaller area — fewer sandbars, so fewer animals in absolute numbers. But also less distance between you and them.
- Milder wind and shorter travel times — easily combined with a day trip from the Randstad.
- Better public transport — Vlissingen, Bruinisse and Yerseke are easy to reach by bus or car; for the Wadden you first have to catch a boat.
- Different fish stock — the Oosterschelde is food-rich but with different prey species than the Wadden, which partly explains why the population took longer to get going here.
- Fewer animals, but growing — go to the Wadden if you want numbers; choose the Delta if you want quiet and easy access.
Population growth since the Delta Works
Before the Oosterschelde was closed off in 1986, the area was an open sea arm with a fluctuating seal population. The storm-surge barrier changed that: for the seals it became a quieter, better-protected area, but with a different tide. In the first years after the closure the population stayed small. From the 1990s onward — and more strongly after 2000 — numbers grew rapidly. Today, at low tide, hundreds of animals are regularly counted at one time on the sandbars of the Oosterschelde. A similar recovery has been seen in the Westerschelde, where the species was previously almost absent.
A milestone in this story is the Roggenplaat sand-replenishment project of 2019. Erosion was steadily losing the Oosterschelde its sandbar surface every year — a process called "zandhonger" (sand hunger), a side effect of the storm-surge barrier. The bar was raised with about 1.3 million cubic metres of sand so that seals, birds and shrimp can keep finding rest and food there in future.
Seasonal tips
- May to September is the high season for viewing: many animals on dry sand, boat trips daily.
- The pupping season for the common seal falls in June and July. Keep extra distance then.
- In November–February grey seals pup; in the Delta in smaller numbers than on the Wadden, but increasing.
- Always combine your visit with the low-tide time for your spot.