Xuéxiào de yóuyǒngguǎn xiàwǔ duì xuésheng kāifàng.
The school's aquatic center is open to students in the afternoons.
Tips
usage
游泳馆 specifically means an indoor/covered pool facility. For outdoor pools use 游泳池 (the pool itself) or 室外游泳池. The 2008 Olympic venue 水立方 is technically called 国家游泳中心 — 'center' rather than 馆 because of its multi-pool scale.
