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Two scuba divers capturing the vibrant marine life near an underwater wreck in crystal clear waters.
📷 Leonardo Lamas · Pexels

Big Blue

4.0 — based on 22 community signals
4.2 12 species 22 contributors

Big Blue offers year-round diving in Thailand's Khlong Bang La On waterway, with healthy coral and consistent marine life sightings.

⭐ Best for beginners.

updated 4 months ago
Difficulty
Beginner
YearRoundAccess

At a glance

Activity
dive
Difficulty
beginner
Best months
Year-round

Top operators here

See all operators ↓

Map

This spot Operators POIs Airport Nearby spots
Big Blue location map © Google · Map data © Google, contributors
Open in Google Maps

Conditions today

Conditions

Open-Meteo
Wind
7.7 kn
Wave
0.8 m
Water
29.4°C
N E S W
Wind direction (7d)
Primary: WSW (25%)
Now: SW (236°)
Tide (7 days)
range: 2.04m

Next: High at 01:00 (+0.96m)

+1.5 m0 m-0.5 m
▲ 01:00 · +0.96m ▼ 08:00 · +0.22m ▲ 14:00 · +0.68m ▼ 19:00 · +0.26m
Sat 19Sun 20Mon 21Tue 22Wed 23Thu 24Fri 25
UV6.2 · high Air PM2.54 · good 06:16 18:24
Day Wind Wave UV Rain
09-19 11.1 0.94 6 44mm
09-20 7 0.78 8 22mm
09-21 5.8 0.56 9 3mm
09-22 4.9 0.38 8 9mm
09-23 3.5 0.34 3 12mm
09-24 5.9 0.3 2 7mm
09-25 7.8 0.3 3 2mm

About this spot

Big Blue is a dive site in Thailand's Khlong Bang La On area that welcomes divers throughout the year. The location sits outside a Marine Protected Area, giving it a different access profile than some regional alternatives. Current coral conditions show no stress, indicating healthy reef structure for exploration. The site supports documented marine life, with 12 species observations recorded from diver visits. This baseline data helps you understand what to expect underwater—though individual dives vary based on season, weather, and time of day. Community divers have contributed 3 videos, giving you real footage to review before your visit. Big Blue works as part of a broader Thailand diving itinerary. Combine it with nearby sites or use it as a reliable option when other locations face seasonal closures or poor visibility. The year-round availability makes planning straightforward, though you should always check local conditions and weather forecasts before booking.

📖 Guide: Diving in Thailand: 73 Sites from Whale Sharks to Shallow Reefs

Best months

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Dive types

Reef

Trip essentials

Everything you need before you pack — checklist, sun, logistics.

Trip checklist

  • 🛂 Visa-free or visa-on-arrival
  • 📜 C-card + dive insurance (DAN)
  • 📔 Dive logbook
  • 🧴 Reef-safe sunscreen SPF 50+
  • 🔌 Plug type A/B/C · 220V adapter
  • 💊 Seasickness meds + ear drops
  • 📱 Offline maps + emergency contact

Quick facts

  • 🌓 Moon First quarter · 47%
  • GPS
Sustainability disclosures
🌍 CO2 footprint LHR ↔ 9852km · ~2266kg · €41

From your departure country

United States
Origin score: 54/100
  • Visa: Visa on arrival · 30 days max
  • Flight: 11h · direct
  • Jet-lag: 12h east · 8 days recovery

FAQ

When is the best time to dive Big Blue?

Big Blue is diveable year-round. However, check local weather and sea conditions before traveling, as monsoon seasons and swell can affect visibility and safety on any given day.

What depth and difficulty level is Big Blue?

Specific depth and difficulty ratings for Big Blue are not documented. Contact local operators or check recent dive logs from the community to confirm what to expect for your skill level.

What marine life will I see at Big Blue?

Twelve species have been observed and recorded at Big Blue. Review the community videos (3 available) to see actual footage, then cross-check with local dive shops for the most current sightings.

Do I need permits or special access to dive Big Blue?

Big Blue is not inside a Marine Protected Area, so standard Thailand diving rules apply. Always verify current local regulations and work with an established operator familiar with the site.

Operators near this spot

Dive centres, kite & surf schools within 10 km, sourced from OpenStreetMap.

Big Blue

0 km
Dive centre
Hours: Mo-Su 07:30-21:00

ME Diving

2.6 km
4.7 (120 reviews) closed
Dive centre
Verified Booked 50+ times this month
Hours: Friday: 10:00 AM – 7:00 PM

Khao Lak Fun Divers

0.4 km
Dive centre

Go2Similan

2.1 km
4.9 (120 reviews) closed
Dive centre
Verified Booked 37+ times this month
Hours: Friday: 9:00 AM – 5:00 PM

Recently spotted by divers

iNaturalist →

Verified marine species observations

12 records · 8 species · sources: OBIS, GBIF

Uca

Fiddler Crabs
Malacostraca · Ocypodidae
OBIS
Last seen:
13 Dec 1998
×4records

Austruca annulipes

Malacostraca · Ocypodidae
OBIS
Last seen:
13 Dec 1998
×2records

Gelasimus tetragonon

Malacostraca · Ocypodidae
OBIS
Last seen:
10 Dec 1998
×1records

Lataxiena blosvillei

Gastropoda · Muricidae
OBIS
Last seen:
9 Oct 1995
×1records

Orania

Gastropoda · Muricidae
OBIS
Last seen:
9 Oct 1995
×1records

Octopus

Cephalopoda · Octopodidae
OBIS
Last seen:
21 Jun 1988
×1records

Cyclophorus diplochilus

Gastropoda · Cyclophoridae
OBIS
Last seen:
Invalid Date
×1records

Conus

Gastropoda · Conidae
OBIS
Last seen:
Invalid Date
×1records

Data: 187,991 observations from OBIS (Ocean Biodiversity Information System) and GBIF (Global Biodiversity Information Facility). CC-BY 4.0.

See this spot in action

YouTube videos — click to play.

Scuba Diving Koh Tao, Thailand 🐠 (Open Water Course With Big Blue Diving) | Stoked For Travel

Stoked For Travel
💬 2 top comments
  • Looks stunning. I miss diving!! 🐠

    @abroadonaboard · 👍 1
  • I loved it!

    @ProfessorPonko · 👍 0

The ONLY Koh Tao Itinerary You Will EVER Need!

Bangkok Jack
💬 3 top comments
  • Amazing video Jack! Thank you.

    @ImaginationBlue · 👍 0
  • Beautiful nature ❤

    @Teerak-pr9 · 👍 0
  • Andy is a perfect example of someone who’s living in a bubble and not in touch with reality.

    @will_274 · 👍 0

The best dive I've ever had was on Koh Tao, Thailand

Big Blue Diving Koh Tao
wind peaks Jul-Aug-Sep, calmest Dec-Oct-Nov, dry Jan-Dec.

5-year monthly climate

60 samples
0 5 10 15 20 25 JFMAMJJASOND
p25–p75 range Median Wind (kn) Air (°C)

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