Depending on the interpretation, there are two or three beaches on Stora Herrö outdoor island. The southeast beaches have barbecue shelters and toilets, and sand is reportedly brought here regularly.

In Jupperi, on the shore of Pitkäjärvi, there is a swimming spot called Surf Beach. It offers a pier, grass to lounge on, and a small parking area. In winter, you can enjoy ice swimming here.

Nuuksio is amazing, but it can sometimes be difficult to find a spot where you can swim easily. One great place is on the southern shore of Ruuhijärvi. You can swim in the clear lake from this spot popular with scouts.

In Nuuksio, on the eastern shore at the end of Ruuhijärvi, there is a small natural sandy beach. The evening sun hits the beach beautifully. The water in Ruuhijärvi is often very clean, and at this shallow sandy beach, it is also warm.

Vilniemi Beach is located in central Espoo on the western shore of Lippajärvi, in the Lippajärvi district. A small but well-maintained sandy beach deepens gradually. On the other side of the shore, you can see Lippajärvi Beach.

Espoo's Kolmperä has a nice, small swimming spot. The water is clear, and there's a bit of sandy bottom next to the pier.

Pohjoinen Myllyjärvi is located in Lahnus, northern Espoo. The small lake is partly a nature reserve.

Kallvik beach is located on the shore of Espoonlahti, next to the Saunalahti residential area. The beach faces directly west, so the evening sun shines here for a long time.

Luukki Beach is located in the Luukkaa outdoor area in North Espoo. Although it is in Espoo, it is actually part of the Helsinkis outdoor area.

On Nouttalahti you can find a small, unofficial beach on the seashore. Espoos 40 kilometres long seashore walkway goes through this beach.

Hannusjärvi is a small lake on southern parts of Espoo. The isn't an official beach there. But on the western side of the lake there is a small pier that local use.

Just outside the continen, neasby Wested, there is a small island named Varsasaari. It is an outdor island full of small cottages. The island is owned by the city of Helsinki (even though it is in Espoo).

Welcome to maybe Espoos archipelagos most beautiful island. Gåsgrundet is on the outer circle of the archipelago. It is an rocky island, but on the northwest shore there are two small beaches. 

Odilampi's small beach is located in Kalajärvi, right on the border with Vantaa. The idyllic beach is peacefully situated in the middle of the forest.

The Klobben beach is at the Klobben peninsula is situated in Soukanranta, south of Laurinlahti in Espoo. The beach is charming and almost quiet place in otherwise quite populated Southern Espoo.

Mellsten Beach is located in the southern Espoo, Haukilahti. Plenty of people live nearby this popular beach.

Pentala is one the islands of Espoo's Archipelago. In the southeastern shore of the island is  beach called Diksand. The beach is in a natural state.

Smalle beach if Kivenlahti is in the middle of quite a big neighborhood in the southern Espoo, by the seaside. The Beach is unofficial, and it actually doesn't even have official name. But the are where it is located is ofted calle Amfi (from amfitheater).

Westend Beach is located in southern Espoo, near Länsiväylä. There is some 4-5 kilometers from here to the center of Helsinki.

The Beach of Toppelund a small beach located in Haukilaht, Espoo. There is a more popular beach Mellsten nearby.

Welcome to Espoos archipelago. Rövaren is a outdoor island in the Eastern Gulf. It can be reached by archipelago boat from april to august, I think..

The Beach of Velskola in Notrhern Espoo. The area is owned and maintaines by the  Evangelical Lutheran Parishes of Espoo. I understand that the beach is a "semi-public". 

The Beach of Saarijärvi is located in Northern Espoo, near the border of Vihti. The lake is shallow with a sandy bottom, so it fit to splash around.

The Beach of Ruispelto is on the north shore of Lake Pitkäjärvi. The beach is small but idyllic. This beach is not well known, and it's used mainly people who live nearby.

The Beach of Oittaa is located on the shores of Lake Bodom. The beach is suitable for families with children as it deepens gradually. Actually Oittaa has actually two seperate beaches. Oittaa is the most popular beach in Espoo, and one of the "top beaches" in Helsinki region.

There isn't actually a swimming beach in Nuottaniemi, but there are three small "sandy spots" from within you can get into the sea. So this is not an official or maintained beach. 

Matinlahti beach is located in Matinkylä. The beach is also known as the Beach of Matinkylä. The beach is one of the Finest in Helsinki-region.