Best Things to Do in Hong Kong Summer: 10 Wild Adventures Beyond the City
Best Things to Do in Hong Kong Summer: 10 Wild Adventures Beyond the City
Hong Kong in summer. The heat wraps around you like a damp towel. The humidity makes your hair do things it's never done before. The air-con units drip onto the pavement from 30 storeys up. And somehow, against all logic, this is when the city truly comes alive.
Everyone thinks they know what a Hong Kong summer looks like. Queues at Ocean Park. Packed beaches at Repulse Bay. Shopping malls cranked to arctic temperatures. Tourists following the same itinerary they found on page one of Google.
But there's another version of summer here. A wilder one. One that doesn't involve queue barriers, chlorine, or elbowing strangers for a patch of sand.
It involves boats. Masks. Volcanic rocks older than dinosaurs. And — if you're feeling brave — jumping off cliffs into the open sea.
Here are 10 ways to do summer in Hong Kong properly. Some are classics. Some will surprise you. A few might just change how you see this city forever.
1. Coasteering in the Hong Kong UNESCO Global Geopark
Let's start with the one you probably haven't heard of.
Coasteering is part rock scrambling, part open-water swimming, part cliff jumping. You wear a helmet and a life vest. You follow a guide along a volcanic coastline that hasn't changed much in 140 million years. You climb where you can, swim where you can't, and jump when the water below is deep enough.
Splitdyboat runs coasteering tours in the heart of the Hong Kong UNESCO Global Geopark in Sai Kung. This isn't a water park ride. There's no queue. No safety briefing video. No gift shop at the exit. Just you, the sea, and hexagonal volcanic columns rising out of turquoise water like nature's own skyscrapers.
The first jump is terrifying. The second is exhilarating. By the third, you're grinning so hard your face hurts.
Why it's a summer essential: The water is bath-warm from May to October. The Geopark's volcanic rock radiates heat. You're in and out of the sea all day, so you never overheat. And the adrenaline? It's the best air-conditioning Hong Kong never built.
2. Snorkelling with Clownfish (Yes, Nemo Lives in Hong Kong)
Most people don't associate Hong Kong with snorkelling. That's their loss.
The waters around the Sai Kung Geopark are astonishingly clear in summer — visibility regularly hits 10 metres. Below the surface, there are coral communities, parrotfish, sea urchins, and actual clownfish doing their thing in actual anemones.
Splitdyboat's snorkelling tours take you to sheltered bays that are only accessible by boat. No crowds. No murky water stirred up by hundreds of feet. Just you, a mask, and an underwater world that rivals what you'd fly to Southeast Asia for.
Never snorkelled before? Doesn't matter. They provide all the gear and a guide who stays with you the whole time. You don't even need to be a strong swimmer — the life vest does the work.
Why it's a summer essential: Summer brings the warmest water and the best visibility. The sea is alive in ways you won't see in cooler months. And honestly, telling someone you went snorkelling in Hong Kong and saw Nemo? That's a flex.
3. Kayaking Through Sea Caves and Arches
There's something about kayaking that puts you in a different relationship with the landscape. You're not watching it from a boat. You're not looking at it through a window. You're at water level, every ripple and current and rock within arm's reach.
Splitdyboat's kayaking tours launch from Sai Kung and weave through the Geopark's most dramatic coastal features — sea arches you can paddle through, caves that echo with every stroke, volcanic cliffs that tower above you like ancient fortresses.
The pace is yours. Glide. Sprint. Stop entirely and float on your back, staring up at a narrow strip of sky between two walls of 140-million-year-old rock.
Why it's a summer essential: The water is calm, the sun is out, and you're getting a workout without realising it. Kayaking is also one of the best ways to cool down — every splash is welcome, and you can roll off the side for a swim whenever you feel like it.
4. Island Hopping to Places Most Hong Kongers Have Never Heard Of
Hong Kong has over 260 islands. Most people visit maybe three of them.
Splitdyboat's island-hopping tours change that. In a single day, you can bounce between islands that have no piers, no ferry schedules, and no crowds. The Ninepin Islands (果洲群島) offer some of the most dramatic hexagonal column formations on Earth — bigger, steeper, and more otherworldly than anything you'll see on the main tourist routes. The Red Coast (赤紅海岸) is a completely different colour palette: iron-rich sedimentary rock in shades of rust, orange, and deep crimson, set against blue-green water.
Each island has its own personality. Each landing feels like a small discovery.
Why it's a summer essential: Summer is the only season when sea conditions are consistently calm enough to reach these outer islands. The boat ride itself — wind in your hair, spray on your face, islands appearing and disappearing on the horizon — is worth the trip alone.
5. Finding a Beach with No One on It
Let's be honest about Hong Kong beaches in summer. Repulse Bay on a Saturday? You'll spend 20 minutes just finding a patch of sand big enough for your towel. Shek O? The bus queue home will break your soul.
But there are beaches in Hong Kong that have no road access. No bus stop. No car park. The only way to reach them is by boat.
Splitdyboat's private speedboat and yacht tours will drop you on a crescent of white sand tucked between two cliffs, and you'll look around and realise — there's no one else here. No Bluetooth speakers competing. No Frisbees flying into your face. Just the sound of small waves and the occasional splash of someone jumping off the boat.
Why it's a summer essential: Because a crowded beach isn't a beach. It's a human soup. You deserve better.
6. A Yacht Day That Doesn't Require a Rich Friend
You know that fantasy — the one where you're lying on the bow of a yacht, sun warming your skin, nothing but blue horizon in every direction, someone handing you a cold drink?
It doesn't have to be a fantasy.
Splitdyboat's yacht tours make this accessible to normal humans. The yacht becomes your floating basecamp for the day. You cruise through the Geopark, anchor near a secluded bay, and the itinerary is whatever you want it to be. Swim. Snorkel. Nap on the deck. Eat lunch with your legs dangling over the side. Climb up to the top deck for a 360-degree view of volcanic islands stretching to the horizon.
Why it's a summer essential: The yacht has shade. It has a toilet. It has fresh water for rinsing off salt. These things matter when you're spending an entire day on the water. It's summer, but you're not suffering.
7. Looking for Hiking in Summer in Hong Kong?!
7.1. Island Hopping to the Ninepin Islands: Hong Kong's Most Spectacular Coastal Hike (That's Actually Easy)
Wait — a hike? On an island? Stay with me.
Most people think Hong Kong's best hikes are on the main island. The Dragon's Back. The Peak. Lion Rock. And yes, those are great. But they're also crowded, exposed to the full force of summer sun, and honestly — you've done them already. It's generally not recommend to do long hours hike in Hong Kong summer considering the high temperature.
There's another kind of hike. One that involves a boat ride first. One where the trail is short, relatively flat, and ends with views that will make your Instagram followers think you've left Hong Kong entirely.
Splitdyboat's Ninepin Islands (果洲群島) Island Hopping Tour takes you to one of the most remote and geologically spectacular corners of the Hong Kong UNESCO Global Geopark. The Ninepin Islands are a cluster of uninhabited islands far out in the eastern waters of Sai Kung. No ferry goes here. No road comes close. The only way to reach them is by private boat — which means the only people you'll share the trail with are the ones on your tour.
The "hike" itself?
This is not a gruelling ascent. This is a gentle exploration. You'll land on North Ninepin Island (北果洲) , where a short, relatively flat path leads you along the coastline. The trail is easy — no steep climbs, no scrambling, no technical sections. But the views? They're world-class.
In front of you: the open South China Sea, stretching endlessly to the horizon. Below you: sheer volcanic cliffs plunging into water so blue it looks Photoshopped. Beside you: the famous "Cannon Rock" (大炮石) , a massive hexagonal column lying horizontally on the cliff edge like a cannon aimed at the sea, and the "Spinning Rock" (旋轉岩) , a giant boulder wedged between two columns that looks like it could roll into the ocean at any moment (it won't — it's been sitting there for millions of years).
Then you'll hop back on the boat and head to South Ninepin Island (南果洲) , where the highlight is "Tiger Roaring Arch" (虎口大洞) — a vertical fissure in the cliff that looks like a staircase carved by the gods. The trail here is equally gentle, a short walk to take in the views and feel the immensity of the geology around you.
Why it's a summer essential: The Ninepin Islands are only accessible in calm sea conditions, which means summer is the prime window. The hike is short and easy, so you won't overheat. The boat ride out — wind whipping through your hair, islands appearing on the horizon — is an adventure in itself. And the views? They rival anything you'd see on a far more difficult mainland hike.
Why it's better than the Dragon's Back in summer: Less crowded (by a factor of about a thousand). More unique (how many people do you know who've been to the Ninepins?). And the sea breeze on the boat keeps you cool in a way that a ridgeline exposed to the midday sun never will.
👉 Explore Splitdyboat's Ninepin Islands Island Hopping Tour
7.2. The Red Coast Island Hopping Tour: Hong Kong's Otherworldly Fire Landscape
And if you've already done the Ninepins, or you want to see a completely different side of Hong Kong's geology — the Red Coast Island Hopping Tour is your next assignment.
Most of Hong Kong's famous rock formations are grey. Volcanic grey. The Red Coast is different. This stretch of coastline on the northeastern edge of Sai Kung is made of iron-rich sedimentary rock that has been oxidising for roughly 400 million years. The result? Cliffs and islands in shades of rust, burnt orange, and deep crimson — a colour palette that feels more like the American Southwest than subtropical Asia.
The hike here is, again, easy. A gentle walk along the coastline of Port Island (赤洲) , where the red rock formations create an almost Martian landscape. The contrast between the fiery red cliffs and the turquoise water is so vivid it looks like someone cranked up the saturation — but no filter needed.
The highlight: "Cobra Rock" (蚺蛇吐舌) , a massive sea erosion formation with walls that glow orange when sunlight hits them, resembling a cobra. Standing inside feels like being inside a furnace designed by nature.
And then there's "Ghost Hand Rock" (鬼手岩) near Wong Chuk Kok Tsui — a weathered rock formation that looks exactly like a giant hand reaching up from the seabed, fingers spread, frozen in stone for eternity.
Like the Ninepins, this area is only reachable by boat. No crowds. No selfie sticks. No one photobombing your shot of a 400-million-year-old hand-shaped rock.
Why it's a summer essential: The Red Coast's unique colouration is most vivid under bright summer sunlight. The water is calmest, the visibility is clearest, and the gentle coastal trail doesn't demand much from you physically — just a willingness to be amazed.
👉 Explore Splitdyboat's Red Coast Island Hopping Tour
Quick Comparison: Which Island Hop Should You Choose?
| Ninepin Islands (果洲群島) | Red Coast (赤紅海岸) | |
|---|---|---|
| Rock Type | Hexagonal volcanic columns (grey) | Sedimentary rock (red/orange) |
| Rock Age | ~140 million years | ~400 million years |
| Difficulty | Easy, flat trails | Easy, flat trails |
| Signature View | Cannon Rock, Spinning Rock, Sky Ladder Cave | Red Cave, Ghost Hand Rock, Martian cliffs |
| Best For | Geology nerds, photographers, "I've done all the normal hikes" people | Colour-obsessed photographers, anyone who wants to see something completely different |
| Vibe | Remote, rugged, volcanic drama | Alien, fiery, otherworldly |
| How to Get There | Splitdyboat tour only | Splitdyboat tour only |
Both are easy hikes. Both offer some of the best views in the Hong Kong UNESCO Global Geopark. Both will make you forget you're in one of the most densely populated cities on Earth.
And neither requires you to wake up at 6am to beat the Dragon's Back crowds.
8. Sunset Paddleboarding or Kayaking
Same activity, completely different vibe.
Splitdyboat offers late afternoon kayaking slots that align with Hong Kong's most spectacular light shows. As the sun drops, the Geopark's volcanic cliffs turn gold, then orange, then deep red. The water goes glassy-calm. The air finally starts to cool. You paddle back towards Sai Kung with the sky putting on a show above you.
Why it's a summer essential: Summer sunsets in Hong Kong are consistently dramatic — the humidity that makes daytime sweaty also creates incredible colours. And paddling at dusk means you skip the midday burn entirely.
9. Eating Your Body Weight in Seafood at a Sai Kung Waterfront Restaurant
This isn't technically a water activity. But it's the essential post-water-activity activity.
Sai Kung's waterfront is lined with seafood restaurants where you pick your dinner from tanks and they cook it however you want. Garlic prawns. Salt and pepper squid. Clams in black bean sauce. Steamed fish with ginger and spring onion. Cold beer. The salt still drying on your skin from whatever you did earlier that day.
Restaurants like Fu Ah Restaurant, Chuen Kee (Michelin's Recommend) and Sing Kee (勝記海鮮) are the famous ones. But honestly, pick one that looks busy and you'll eat well.
Why it's a summer essential: The seafood tastes better when you've earned it. And sitting outdoors by the water as the evening cools down is peak Hong Kong summer.
🔎 Search All Hong Kong Geopark Food Combo Package
10. The Four Caves Volcanic Tour — Adventure for Absolutely Everyone
Not everyone wants to jump off cliffs. Not everyone wants to snorkel. Some people just want to see something spectacular without getting wet, without breaking a sweat, and without having to be an athlete.
Splitdyboat's Four Caves Volcanic Tour is the answer. A four-hour yacht journey through the Geopark, visiting four massive sea caves — Bell Cave (吊鐘洞), Wang Chau Cave (橫洲角洞), Sha Tong Hau Cave (沙塘口洞), and Basalt Island Cave (火石洲洞). Each one is a cathedral carved by waves over millions of years.
You'll also land on Sharp Island (橋咀洲) to see the famous "pineapple bun rocks" and walk the tombolo sandbar that appears at low tide. Then you'll visit Kau Sai Village (滘西村) on Kau Sai Chau, home to a 130-year-old Hung Shing Temple and the chance to see Kirin dancing (舞麒麟), a Hong Kong intangible cultural heritage tradition.
Every landing point is flat, paved, and accessible. Wheelchair-friendly. Stroller-friendly. Three years old or eighty years old — everyone can do this.
Why it's a summer essential: Because adventure shouldn't have a fitness requirement. This is the tour for families, grandparents, and anyone who wants to see Hong Kong's geological wonders without the sweat.
🛥️ Splitdyboat Geopark Four Sea Arches Volcano Sightseeing Yacht Tour (4 hours)
The Real Hong Kong Summer
Here's the thing. Most summer guides will tell you to go to Ocean Park. Go to Disneyland. Go to the Peak. Go to the malls.
And sure. Those things exist. They're fine.
But Hong Kong's summer isn't meant to be spent in queues and air-conditioned boxes. It's meant to be spent in the water. On the water. Under the water. It's meant to involve salt and sun and the kind of tired that comes from doing something real.
Everyone hits the water parks and beaches.
But the best summer adventure in Hong Kong requires a boat, a mask, and a willingness to jump off volcanic cliffs.
You know where to find it now.
Ready to plan your summer?
👉 Explore all Splitdyboat summer tours and experiences
📱 Questions? WhatsApp the Splitdyboat team directly.
This summer, don't just survive the heat. Get in the water.