The Yellow Sea experiences its highest temperatures in July and August, making it the ideal time for swimming with water temperatures reaching up to +25°C. In September, the water remains quite suitable for swimming at around +21°C. Starting from October, the temperature starts to drop, but even during this period, many people still venture into the water as it warms up to around +17°C.
It's important to note that storms and typhoons can occur off the coast of China, and they can be quite severe, causing damage and casualties. While Beidaihe is generally calmer, when a typhoon is registered in the vicinity of the bay, waves in the Yellow Sea near Beidaihe can reach heights of up to 3 meters. Usually, such weather conditions are known in advance, so it's advisable to monitor the weather and heed any warnings provided by forecasters.
The tides of the Yellow Sea are quite noticeable, and it's a good idea to check the tide schedule with your hotel to avoid getting caught in low tide or shallow waters. Beidaihe's beaches vary, so it's best to inquire about tide conditions in advance. In the central part of the coastline, the tides may be less noticeable, but you may need to walk further into the deep end if you want to swim.
