Beijing in July and August runs hot and humid, not dry. How to rebuild your day around the clock, which sights have shade and which have none, what to drink, what to buy in a pharmacy or convenience store, and how to handle the mosquitoes that bite in daylight.
Beijing in July and August is not a dry heat. Average highs sit around 32°C, but average relative humidity climbs to roughly 72% in July and 73% in August, and the city crosses 35°C often enough that the municipal climate centre counted seven such days during the 2025 sanfu period against a long-term normal of about three. The heat itself is survivable. What wrecks trips is the combination of heat, humidity and a sightseeing schedule that was designed for spring. This guide is the practical version: how to restructure your day around the clock, which sights have shade and which have none, what to drink, what to buy in a Beijing pharmacy or convenience store, and how to deal with mosquitoes and sun.
The headline number is misleading. Beijing rarely reaches the 40°C of a Gulf city, but the humidity means sweat does not evaporate, so 32°C here can feel worse than 38°C somewhere dry. Locals have a name for the worst stretch: qixia bashang, roughly late July to early August, when heat, humidity and sudden heavy rain all arrive together. Afternoon thunderstorms are common in that window and they cool the air for an hour before leaving it more humid than before.
The single most useful thing you can do is stop treating summer like spring. Beijing gets light before 05:00 in midsummer and the big parks open at 06:00, which hands you a genuinely pleasant two to four hours that most visitors sleep through. Spend it outside. Then treat 11:00 to 15:30 as indoor time, and come back out after 16:00 when the temperature drops and the light turns good. Dinner outdoors after 19:00 is when the city is at its best, and it is also when you will want repellent.
Three of Beijing's biggest sights work in summer for the same reason: they are mostly water, mature trees and covered walkways, and they open at 06:00 — two and a half hours before the Forbidden City. The Summer Palace opens at 06:00 from April to October, closes at 20:00 with last entry at 19:00, and costs ¥30 for the garden or ¥60 for the combined ticket; the Long Corridor along Kunming Lake is roofed for most of its length and the lake breeze is real. The Temple of Heaven opens its gates at 06:00 with the core buildings at 08:00; ¥15 gets you into the park, ¥34 the combined ticket, and the cypress avenues are properly shady. Beihai Park runs 06:00–21:00 at ¥10 or ¥20 combined, and sits beside the Forbidden City's north gate, which makes it the obvious second half of a morning.
The Forbidden City is the hard one. It opens at 08:30 and closes at 17:00 from April to October, costs ¥60, closes on Mondays, and needs three to four hours — and its courtyards are deliberately, monumentally bare. There is almost no tree cover on the central axis and very little indoor space open to visitors. The Great Wall is worse: no shade at all on the ramparts, and the climbs between towers are fully exposed. Treat both as early-morning commitments, carry more water than feels necessary, and put nothing demanding in the afternoon afterwards. If you only have one early start in Beijing, give it to the Wall — the palace at least has side halls you can duck into.
Plain water alone is not enough when you are soaking through a shirt an hour; you also need to replace some salt and potassium. Pocari Sweat (宝矿力水特) is the default electrolyte drink in China and costs roughly ¥5–6 for a 500 ml bottle in a convenience store, with cheaper local brands running around ¥3–4. Pharmacies sell oral rehydration salt sachets (口服补液盐) for a few yuan a box, which is the cheapest and most effective option if you are genuinely depleted. Do not drink electrolyte drinks all day when you are not sweating — you are just taking in sugar. A workable target on a hot sightseeing day is 2–3 litres of fluid, with roughly one electrolyte drink for every two bottles of plain water.
Huoxiang zhengqi shui (藿香正气水) is the bottle any Beijing pharmacy will put in front of you the moment you mention the heat. Read the label before you buy it: it contains 40–50% alcohol. It is also aimed at what Chinese medicine calls yin shu — the heavy-headed, nauseous, bloated feeling that comes from aggressive air conditioning or too much iced drink, not from standing in the sun. For classic sunstroke — overheated, sweating hard, thirsty and dizzy after sun exposure — it is the wrong medicine and can make you feel worse, and it does not prevent heatstroke. If you want the same product without the alcohol, ask for 藿香正气口服液 or 藿香正气胶囊. It must not be combined with cephalosporin antibiotics, metronidazole or similar drugs, and you should not drive after taking it.
Heat exhaustion is the version you are likely to meet. It looks like heavy sweating, pale clammy skin, dizziness, headache, nausea and a weak fast pulse, with a temperature that is raised but not extreme. The response is unglamorous and works: get into shade or air conditioning, lie down with your legs raised, sip fluids with electrolytes, loosen clothing, and cool the skin with a wet cloth or a fan. Most people are noticeably better within half an hour. Heatstroke is a different thing and an emergency: body temperature climbing past about 40°C, skin that has stopped sweating and is hot and dry, confusion, slurred speech, vomiting or loss of consciousness. Call 120, get the person somewhere cold, and cool them hard with ice packs at the neck, armpits and groin while you wait.
Beijing's summer mosquito is mostly the Asian tiger mosquito (白纹伊蚊, the stripy one locals call 花蚊子), and unlike the mosquitoes many visitors are used to, it bites in daylight — especially early morning and late afternoon, and it is perfectly happy in the shade of a park. That makes an outdoor dinner by the lake the highest-risk moment of your day, not bedtime. Repellents that actually work in China use one of three actives: DEET (避蚊胺), icaridin or picaridin (埃卡瑞丁 / 派卡瑞丁), or IR3535 (驱蚊酯). The household brand is Liu Shen (六神) 驱蚊花露水, in every convenience store and supermarket for well under ¥30; imported DEET and picaridin sprays are in Watsons (屈臣氏) and larger supermarkets. One rule that matters: apply sunscreen first, let it settle, then apply repellent. Layering repellent over sunscreen or mixing them cuts the repellent's effectiveness.
Sunscreen in China is labelled the same way as elsewhere in Asia: SPF covers UVB, the rays that burn, and PA covers UVA, the rays that age skin and come through glass. For a day outdoors look for SPF50+ and PA++++. Sunscreen is regulated as a special-use cosmetic and legal products carry a 国妆特字 or 国妆特进字 approval number on the package, so buy from supermarkets, brand counters or official online flagship stores rather than street stalls. Prices are unremarkable. The more useful local habit is hardware rather than cream: paper umbrellas carried purely for shade (遮阳伞), cooling arm sleeves (冰袖) and small handheld fans are cheap and everywhere, and in Beijing a sun umbrella is entirely normal for people of any gender.
From roughly 11:00 to 15:30 the correct answer is to be inside, and Beijing has plenty of inside. The National Museum of China is free, runs 09:00–17:00 with last entry at 16:00, closes on Mondays, and sits on the east side of Tiananmen Square at Metro Line 1 Tiananmen East. The city's other big museums are all air conditioned, as are the malls in Guomao, Sanlitun and Xidan — which are legitimate refuges rather than a wasted afternoon, and usually have decent basement food halls. Swimming pools exist mostly at international-chain hotels if that matters to you. A slow late lunch followed by an hour in a cafe is a perfectly respectable way to spend the two worst hours of the day, and it sets you up for the evening.