Bosphorus Swimmers and Aquatic Athletes Deliver a Busy Week Across Istanbul's Waterways

Selçuk Demir clocked 48 minutes 22 seconds crossing from the Asian to the European shore at Saturday morning's Üsküdar–Kabataş open-water sprint, organised by the İstanbul Boğazı Yüzme Kulübü and drawing 340 registered participants — the largest field the club has logged for a July edition since the event was formalised in 2019. Demir, a 24-year-old from Kadıköy, edged out Kaan Arslan by eleven seconds in the men's elite category, while Selin Yılmaz took the women's title in 54 minutes 07 seconds, a course-record for the redesigned southern crossing route.

The timing matters. Istanbul's aquatic calendar traditionally peaks between late June and mid-September, when Bosphorus water temperatures settle between 22 and 26 degrees Celsius, but this summer the city's sports directorate has front-loaded the schedule after last year's administrative delays pushed three flagship events into October. The İstanbul Büyükşehir Belediyesi Spor A.Ş. — the municipality's commercial sports arm — confirmed on Monday that it has committed an additional 4.2 million Turkish lira to aquatic programming for the July-August window, covering lane fees, timing equipment hire and safety boat deployment.

Pool Results: Olimpiyat Havuzu and Alibeykoy Aquatics Centre Lead the Way

Inside pools, Wednesday's regional age-group championships at the Atatürk Olimpiyat Havuzu in Başakşehir produced three national junior qualifying times. The most striking came in the women's 200-metre butterfly: 15-year-old Dilnoza Karimova, training under Fenerbahçe Spor Kulübü's aquatics section, touched the wall at 2:11.84, putting her inside the Turkish Swimming Federation's A-standard for the U17 nationals in Ankara in September. It was the first time a Fenerbahçe junior swimmer had hit that standard since 2021.

The Alibeyköy Aquatics Centre in Eyüpsultan, which opened its expanded 50-metre competition pool in April 2025 after an eighteen-month renovation, hosted Thursday's club relay invitational. Galatasaray Spor Kulübü's mixed 4x100-metre medley team won in 3:52.11, beating Beşiktaş JK by 0.7 seconds in a finish that drew a standing crowd of roughly 400 spectators in the 1,200-seat gallery. Beşiktaş coach Tarık Sönmez told reporters afterward — without elaboration — that his squad had more to show before the summer's main events. The rivalry between these two clubs in the pool has grown considerably since Beşiktaş established a full-time aquatics academy in Levent in 2023.

Water polo also made news. The Kadıköy Marina pool hosted the first of four round-robin league matches this week under the Türkiye Su Topu Federasyonu's revised summer league format, which now runs concurrent with, rather than after, the swimming season. Fenerbahçe defeated Galatasaray 9-7 in front of an estimated 600 supporters on Tuesday evening, with Oğuz Tekin scoring four goals from the two-metre position. Beşiktaş beat newcomers Kartal SK 12-4 on Wednesday.

What to Watch in the Coming Days

The week ahead carries significant weight for open-water athletes specifically. The İstanbul Boğazı Yüzme Kulübü's longer-distance Boğaz Geçişi — the famous intercontinental crossing from Kanlıca to Kuruçeşme — is scheduled for July 12, pending final coast guard clearance. That race typically draws between 1,500 and 2,000 swimmers of mixed abilities and has sold out every year since 2014. Entry fees this year were set at 850 Turkish lira for club members and 1,200 lira for independents, up from 600 and 900 lira respectively in 2024.

For casual swimmers, the municipality's Aqua Istanbul programme runs free coached open-water sessions every Sunday morning at Florya Aquapark beach through the end of August. Participants must register through the İBB Spor mobile application at least 48 hours in advance; slots for July 6 were still available as of Thursday afternoon. The heatwave gripping much of Europe — France recorded more than 2,000 excess deaths at the peak of this week's temperatures — has not reached the Marmara coast at crisis levels, but water safety officials are urging all open-water swimmers to check conditions at istanbul.gov.tr before entering the Bosphorus independently.