Things to Do in Koh Tao in July

Q: Is Koh Tao safe for solo travelers in July?

Koh Tao scores 7.6/10 for solo-traveler safety (see /research/solo-safety/). The main July-specific risks are scooter crashes on wet, steep roads and currents off Sairee on windy afternoons, so use taxis for the hill roads and swim on the east coast when the wind is up.

VerdictGood
Ranked#6 of 12
PricesModerate

Stay in Koh Tao in July

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July on Koh Tao is not what Thailand's broader July reputation might lead you to expect. The southwest monsoon hits Phuket and the Andaman coast hard this month, but Koh Tao sits on the Gulf of Thailand, sheltered from most of that weather, and its big rains typically hold off until October and November. Daytime highs run around 28.5°C (83°F) and nights barely drop, settling near 26.4°C (80°F). The showers that do arrive are mostly short, warm bursts that roll across Sairee Beach in the late afternoon and clear within the hour.

The second thing to know is that July is Koh Tao's mid-year mini high season. European school holidays start in the second half of the month, and dive schools in Sairee and Mae Haad fill Open Water courses faster than they did in June. It is nowhere near the December and January crush, though, and beaches like Freedom Beach and Tanote Bay still have room by mid-morning.

The catch is the wind. The monsoon pushes swell onto the west coast, so Sairee and Mae Haad can get choppy and murky on some afternoons, while the east-facing bays at Ao Leuk, Tanote and Hin Wong stay glassy. The ferry crossing from Chumphon can also be rough, so pack motion-sickness tablets if you get queasy.

Why visit in July

The Gulf of Thailand avoids the worst of the southwest monsoon, so Koh Tao's rain comes mostly as short afternoon showers while Phuket and Krabi endure days of steady downpour.
Water temperatures near 29°C (84°F) mean divers at Chumphon Pinnacle and the Twins can stay down comfortably in a 3mm shorty or a rash guard.
The east-coast bays of Ao Leuk, Tanote and Hin Wong sit in the lee of the monsoon wind, and their snorkeling water is often calmer in July than in the dry months.
Southern Thai fruit season peaks, and mangosteen, rambutan and longkong pile up on the stalls along Mae Haad's main road.

Worth knowing

Monsoon swell can churn up the west coast, and on windy afternoons visibility at Sairee's house reefs and around Nang Yuan Island falls noticeably.
Catamaran crossings from Chumphon can be rough in July, with a few sailings a month cancelled or delayed because of sea conditions.
Rain falls on most days of the month, and even when showers are brief, laundry, towels and dive gear rarely dry out fully.
From the third week of July, European family holidays fill beachfront bungalows in Sairee and Chalok Baan Kao, so walk-in availability disappears.

Best for

Think twice if

Weather measured 29° / 26°C 172mm rain · 23 rainy days · 80% humidity rains perceptibly ~3.3h/day · 65% of mornings dry

Crowds medium

Pack Quick-dry shorts and linen shirts, two swimsuits so one can dry, a packable rain shell, and reef shoes for the rocky entries at Ao Leuk and Shark Bay. Leave the fleece at home, because nights stay above 26°C (79°F).

July delivers about 172mm (6.8 in) of rain spread across roughly 23 rainy days, though that count includes plenty of 20-minute drizzles. It is wetter than June's 120mm, but well below October's 275mm and November's 336mm, which mark the island's true wet season. Humidity sits around 80%, and air and sea temperatures stay within a degree or two of each other. Most mornings are sunny, with clouds building over the hills behind Mae Haad after lunch.

Seasonal caution

Southwest monsoon swell affects the Gulf crossing from Chumphon, and on windy days high-speed catamaran services can be delayed or cancelled, so allow a buffer day before any onward flight from Chumphon or Surat Thani.
West-coast beaches such as Sairee can see strong currents during afternoon onshore winds. Stick to the reef line when the water is flat.

Year-round climate

Averages from the last 5 years.

Monthly climate averages for Koh Tao
Month	Avg high (°C)	Avg low (°C)	Rainfall (mm)
Jan	27	25	20
Feb	27	25	76
Mar	28	26	33
Apr	29	27	80
May	29	27	189
Jun	29	27	120
Jul	29	26	172
Aug	28	26	145
Sep	28	26	192
Oct	28	25	275
Nov	28	25	336
Dec	27	25	135

Holidays and festivals in July

Public holidays

Asalha Bucha Day(วันอาสาฬหบูชา)18 July 2027
King Vajiralongkorn's Birthday(วันเฉลิมพระชนมพรรษา ร.10)28 July 2027

Best things to do in July

East-coast snorkeling at Ao Leuk and Tanote Bay

snorkeling

Rent a mask and fins in Mae Haad and head by scooter or taxi to Ao Leuk, where the coral garden starts about 20 metres (65 ft) from the sand. Tanote Bay has a boulder reef and Black Tip Rock, a jumping spot at the bay's north end.

The southwest monsoon hits the west coast, so the east-facing bays sit in the wind shadow and are often the calmest water on the island in July.

Booking tipGo before 11am: afternoon cloud reduces light on the reef, and taxi trucks fill up after lunch.

Open Water dive course

diving

A three-to-four-day certification course in Sairee or Mae Haad, with training dives at Japanese Gardens, the Twins and Mango Bay.

The water sits around 29°C (84°F), and with the Andaman dive boats in Khao Lak and Phuket mostly laid up, Koh Tao becomes Thailand's main dive school in July.

Booking tipConfirm your school a week ahead for start dates after 15 July, because schools cap class sizes and courses fill from the European holiday bookings.

Deep dives at Chumphon Pinnacle and Sail Rock

diving

Chumphon Pinnacle is a granite seamount 11km (7 mi) northwest of the island, where schooling batfish, barracuda and occasional whale sharks pass through. Sail Rock sits midway to Koh Phangan and has a vertical swim-through called the Chimney.

Water temperature supports long bottom times without a full wetsuit, and the plankton that follows the rain draws the chance of a whale shark visit, though sightings are less predictable than in March and April.

Booking tipBook Sail Rock trips on your first day, because boats go out solely when the forecast allows and you will want two or three possible days in hand.

John-Suwan Viewpoint sunrise hike

hiking

A steep 15-minute scramble from Freedom Beach at the southern tip of Chalok Baan Kao, ending on boulders that overlook Shark Bay on one side and Chalok Bay on the other.

Mornings are the clearest part of a July day before the afternoon clouds build, and the air is cool enough for the climb if you set off before 7am.

Booking tipThe trail charges a small entry fee at the base, so bring small notes, and wear shoes with grip because the rock stays slick after overnight rain.

Snorkeling with blacktip reef sharks at Shark Bay (Ao Thian Og)

wildlife

Juvenile blacktip reef sharks patrol the shallow reef off the southeast coast, while hawksbill and green turtles graze on the seagrass nearby.

Shark Bay faces southeast, away from the monsoon wind, so the water stays flat on July mornings when the west coast is choppy.

Booking tipWalk in from the resort path and swim quietly at the reef edge before 9am. The sharks clear out once the tour boats arrive later in the morning.

Longtail round-island tour with a Nang Yuan stop

boat trip

Longtail boats from Sairee circle the island, stopping at Mango Bay, Hin Wong and Nang Yuan Island, where three islets connect by sandbars.

In July, captains route the loop around the wind, spending more time on the sheltered east side. If Nang Yuan's sandbar picks up swell, they swap in another stop.

Booking tipArrange the tour with a longtail captain on Sairee Beach the evening before and agree on the stops in advance. On windy days, ask to start on the east coast.

What to eat in July

In season: fruit

Mangosteen (mangkhut)
Southern Thailand's mangosteen harvest peaks in July, and the purple-shelled fruit reaches Koh Tao fresh on the Chumphon boats, selling by the kilo at the Mae Haad pier stalls.
Longkong (langsat)
Longkong season in the southern provinces runs from late July into September. These small, tart-sweet clusters are sharper than longan and come in bunches from roadside carts near the Sairee 7-Eleven junction.
Rambutan (ngoh)
Rambutan from the Surat Thani orchards peaks in July and August. Stalls stack the red, spiky fruit in bags, and it keeps well in a dry-bag on a boat trip.
Durian (thurian)
July marks the tail end of the southern durian harvest, when the fruit is at its ripest and softest, and since many bungalows ban it indoors, the market is where you want to eat it.

What to drink

Nam maprao (fresh young coconut)
At 80% humidity, a chilled coconut from Sairee Beach or the Chalok Baan Kao roadside stands will do more to replace fluids after a two-dive morning than a soda ever will.

Regular events in July

Asahna Bucha (Asalha Puja)Free

A national Buddhist holiday marking the Buddha's first sermon, when islanders walk candlelit circuits around the temple grounds in Mae Haad in the evening and alcohol sales are banned across Thailand for the day.

Full moon of the eighth lunar month, usually in July

Khao Phansa (start of Buddhist Lent)Free

The day after Asahna Bucha marks the start of the monks' three-month rains retreat, when locals present candles and robes at temples and the nationwide alcohol-sale ban runs through this second day.

The day after Asahna Bucha, usually July

King Vajiralongkorn's BirthdayFree

A national public holiday marked by portraits and yellow flags along the Mae Haad pier road. Government offices and banks close, and Thai visitors from Bangkok add to the weekend ferry demand.

28 July

Full Moon Party at Haad Rin, Koh Phangan

The monthly all-night beach party on Koh Phangan, about a 90-minute boat ride away, pulls some of Sairee's backpacker crowd off the island for a night, and ferries run fuller the day before and after.

On or near each full moon

Best places this July

Ao Leuk
beach
A deep, sheltered cove with a shallow coral garden and the most reliable July snorkeling spot on the island, because the monsoon wind blows offshore here.
Ao Leuk
Tanote Bay
beach
An east-coast bay with boulder reefs and Black Tip Rock at its northern point, reached by a steep concrete road that needs care after rain.
Tanote
Nang Yuan Island
island
Three islets joined by sandbars off the northwest coast, with a viewpoint climb on the southern islet. Go on a calm morning, because afternoon swell reaches it in July.
Sairee
John-Suwan Viewpoint
viewpoint
A boulder-top lookout over the southern bays, where the light is clearest on July mornings.
Chalok Baan Kao
Hin Wong Bay
beach
A rocky, undeveloped bay on the northeast coast with clear water on July's calm-sea days and almost no beach crowd.
Hin Wong
Chumphon Pinnacle
dive site
The island's signature deep dive site, a granite pinnacle rising from about 36 metres (118 ft) and home to large schools of trevally.
offshore northwest
Sairee Beach at sunset
beach
The island's longest beach, about 1.7km (1 mi), where the bars along the sand face west and July's broken monsoon clouds make for dramatic orange sunsets.
Sairee

Your packing checklist

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Packable rain shellAfternoon cloudbursts over Mae Haad usually last 20 to 40 minutes. A thin shell keeps your phone and passport dry on a scooter ride home. Shop
Motion-sickness tabletsThe Chumphon catamaran runs into monsoon swell in July, so take a tablet 30 minutes before boarding, not once the boat is already rolling. Shop
Dry bag (10 to 20 litres)On choppy days, longtail rides to Ao Leuk and Nang Yuan take spray over the bow, and rain showers hit mid-trip. Shop
Reef-safe sunscreenThailand has banned oxybenzone sunscreens in marine national parks, and UV still burns through in 30 minutes at the snorkel sites under July's broken cloud. Shop
Reef shoesThe entries at Ao Leuk, Shark Bay and Hin Wong are over rock and dead coral, both of which get slick with algae in the rainy months. Shop
Rash guard or 3mm shortyAt about 29°C (84°F) you won't need a full wetsuit, but a rash guard protects against jellyfish, which drift in more often after wet-season rain. Shop
Insect repellent with DEET or picaridinStanding rainwater breeds mosquitoes in the jungle behind Chalok Baan Kao and Tanote, and dengue cases on Thai islands climb in the wet months. Shop
Quick-dry microfibre towelAt 80% humidity, a cotton towel stays damp for days, while microfibre dries overnight on a bungalow balcony. Shop

Insider tips

When the west coast is choppy, dive schools in Sairee quietly switch their training dives to Mango Bay or Shark Island, so ask your instructor which side the boat is heading to before you pay for a fun-dive package.
Mae Haad's fruit stalls get their best mangosteen and longkong right after the morning Chumphon ferry unloads, around 10am, and by evening only the bruised fruit is left.
The concrete roads down to Tanote Bay and Ao Leuk get slippery after a shower, and locals hire a songthaew taxi for those descents rather than ride a rented scooter. Scooter crashes are the island's most common injury.
On Asahna Bucha and Khao Phansa, the beach bars on Sairee stop selling alcohol, so plan a sunset dinner in Chalok Baan Kao on those nights rather than a bar crawl.

Avoid these mistakes

Booking a same-day ferry to Chumphon and an evening flight home. July swell cancels crossings often enough that you should leave a full buffer day.
Staying only on Sairee and assuming the whole island's water looks like its choppy afternoon shore. A 15-minute ride east reaches the calm bays.
Don't skip a room booking for the last ten days of July on the assumption that it's low season: European school-holiday demand fills the mid-range beach bungalows in Sairee and Chalok Baan Kao.
Don't plan the John-Suwan hike or a Nang Yuan trip for mid-afternoon, when clouds build and the rock gets wet. Go before 9am.

Practical tips for July

Book the Lomprayah or Songserm catamaran from Chumphon a few days ahead in late July, and choose the morning sailing, because seas tend to build through the afternoon. The overnight boat from Surat Thani is slower but rides the swell more steadily. ATMs cluster around Mae Haad pier and the Sairee main road, and on public holidays the banks close while the ATMs keep working. On the two Buddhist holidays, bars and shops across Thailand stop alcohol sales for 24 hours, and temples in Mae Haad expect covered shoulders and knees. Dive shops close their office desks at dusk, so settle next-day bookings before 6pm. Wikivoyage covers ferry routes at https://en.wikivoyage.org/wiki/Koh_Tao#Get_in and local transport at https://en.wikivoyage.org/wiki/Koh_Tao#Get_around.

FAQ

Is July a good time to visit Koh Tao?

Yes, it's a good month, though not the best. Koh Tao sits on the Gulf side, so it misses most of the monsoon rain that shuts down the Andaman coast in July. Expect brief showers and some rough west-coast water, and plan to snorkel on the calm eastern bays. March and April remain the flattest, clearest months.

Does it rain a lot on Koh Tao in July?

It rains often but not heavily. Most wet days bring a short afternoon downpour rather than all-day rain, and the heavy season comes later: October and November each get well above what July receives.

Is the ferry to Koh Tao rough in July?

Sometimes. Monsoon swell makes the catamaran from Chumphon bumpy, and on a handful of days a month sailings are delayed or cancelled. Take the morning boat and bring seasickness tablets.

Is Koh Tao crowded in July?

Early July is fairly quiet. From about the third week, European family holidays push up demand in Sairee and Chalok Baan Kao and dive courses fill, though it still feels roomier than the Christmas and New Year peak.

Is Koh Tao safe for solo travelers in July?

Koh Tao scores 7.6/10 for solo-traveler safety (see the TTDI Solo-Safety Index). The main July-specific risks are scooter crashes on wet, steep roads and currents off Sairee on windy afternoons, so use taxis for the hill roads and swim on the east coast when the wind is up.