Gianiskari beach, Sandy beach near Akrotirio Araxou, northwestern Peloponnese, Greece

Gianiskari is a sandy beach on the Ionian Sea in the northwestern Peloponnese, near the village of Akrotirio Araxou. It lies between two hills whose kermes oaks and Mediterranean scrub were destroyed by fires in 2011, 2012, 2014 and 2017. A partly unpaved road from the village leads to the shore, where a small canteen operates in summer.

The name Gianiskari paraphrases Gialiskari, from the medieval Greek Aigialiskarion, a diminutive of Aigialos (seashore). Forest fires in 2011, 2012, 2014 and 2017 destroyed all the kermes oaks and Mediterranean vegetation on the hills around the beach.

The name Gianiskari derives from "Gialiskari", a medieval Greek diminutive of "Aigialos" (seashore). In summer the beach is a popular spot for locals, and its only facility is a small seasonal canteen or beach bar. In May 2018 Posidonia oceanica sea grass washed up along a 5–6 metre-wide strip of the shore.

Access is via a partly unpaved dirt road that starts in the village of Akrotirio Araxou. The only facility in summer is a small canteen and beach bar. The beach lies between two hills, and the stretch north of it belongs to the Araxos Naval Fort and is restricted.

This beach marks the northwesternmost public access point to the Peloponnese coast and sits next to a naval military installation that has limited its development. The proximity to this restricted facility has kept the area relatively quiet and undeveloped over time.