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Scuba diver swims above colorful coral reef, surrounded by fish in an underwater scene.
📷 Gilbert Cayamo · Pexels

Big Wall

3.9 — based on 16 community signals
4.2 12 species 26 contributors

Big Wall is a year-round dive destination in Tanzania with 12 documented species observations and active community engagement.

⭐ Best for intermediate divers.

updated 4 months ago
BleachingRiskPhotoFriendly

At a glance

Activity
dive
Best months
Year-round
Marine life
Nudibranch

Top operators here

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Map

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

Conditions today

Conditions

Open-Meteo
Wind
7 kn
Wave
1.68 m
Water
26.3°C
N E S W
Wind direction (7d)
Primary: SE (69%)
Now: SSE (168°)
Tide (7 days)
range: 2.89m

Next: Low at 01:00 (-0.16m)

+1.9 m0 m-1.0 m
▼ 01:00 · -0.16m ▲ 08:00 · +1.02m ▼ 15:00 · +0.03m ▲ 20:00 · +0.52m
Sat 19Sun 20Mon 21Tue 22Wed 23Thu 24Fri 25
UV6.6 · high Air PM2.510 · good 06:13 18:19
Day Wind Wave UV Rain
09-19 12.8 1.7 7 4mm
09-20 14.6 1.82 9 2mm
09-21 13.9 1.84 9 0mm
09-22 13.9 1.84 8 3mm
09-23 12.9 1.46 9 0mm
09-24 12.1 1.42 8 0mm
09-25 13.1 1.22 9 1mm
⚠ Coral bleaching: Watch — favorable conditions
DHW: 0.3°C-weeks · NOAA Coral Reef Watch

About this spot

Big Wall offers Tanzania divers a compelling destination with documented marine life across 12 recorded species observations. The site benefits from active community interest, with three available videos showing conditions and marine encounters. While specific depth and visibility data are currently unavailable, the year-round accessibility makes Big Wall a flexible choice for dive planning. The dive site sits outside protected marine areas, giving operators straightforward access. Given the current coral bleaching watch status for the region, divers should expect variable reef conditions depending on seasonal patterns. Community contributions form the backbone of current knowledge about Big Wall, making it an evolving destination as more divers document their experiences. Tangania's dive season remains productive throughout the year, though water conditions and marine activity vary by month. Big Wall's year-round viability means divers can plan trips based on personal schedules and regional weather patterns rather than strict seasonal windows. The available species data and video content provide baseline reference points for what to expect underwater.

📖 Guide: Diving in Tanzania: 11 Sites from Manta Rays to Deep Walls

Best months

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

Marine life

Nudibranch

Dive types

Wall

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 D/G · 230V adapter
  • 💊 Seasickness meds + ear drops
  • 📱 Offline maps + emergency contact

Quick facts

  • 🌓 Moon First quarter · 47%
  • GPS
Sustainability disclosures
🌍 CO2 footprint LHR ↔ 7410km · ~1704kg · €31

From your departure country

United States
Origin score: 56/100
  • Visa: Visa on arrival · 30 days max
  • Flight: 11h · with connection
  • Jet-lag: 8h east · 6 days recovery

FAQ

When is the best time to dive Big Wall?

Big Wall is diveable year-round, giving you flexibility in planning. Check current conditions and water temperature before booking, as regional patterns shift seasonally across Tanzania.

What depth and difficulty level is Big Wall?

Specific depth and difficulty ratings for Big Wall are not currently documented. Review available community videos and consult local operators for current site conditions before your dive.

What marine life can I see at Big Wall?

Twelve species have been recorded at Big Wall. Check the community video documentation and species observation logs to see what divers have encountered on recent dives.

Are permits or MPA restrictions required?

Big Wall lies outside marine protected areas, so standard access applies. Verify any local regulations or operator requirements with your dive service before arrival.

Operators near this spot

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

TGI diving

6.8 km
Dive centre

Recently spotted by divers

iNaturalist →

Verified marine species observations

20 records · 17 species · sources: OBIS, GBIF

Acanthaster mauritiensis

Asteroidea · Acanthasteridae
GBIF
Last seen:
24 Feb 2026
×2records

Odontodactylus scyllarus

Malacostraca · Odontodactylidae
GBIF
Last seen:
24 Feb 2026
×1records

Ocypode ryderi

Malacostraca · Ocypodidae
GBIF
Last seen:
5 Feb 2026
×1records

Acanthosepion pharaonis

Cephalopoda · Sepiidae
GBIF
Last seen:
5 Feb 2026
×1records

Phyllidiella zeylanica

Gastropoda · Phyllidiidae
GBIF
Last seen:
4 Feb 2026
×3records

Halgerda carlsoni

Gastropoda · Discodorididae
GBIF
Last seen:
4 Feb 2026
×1records

Chromodoris africana

Gastropoda · Chromodorididae
GBIF
Last seen:
4 Feb 2026
×1records

Chromodoris lochi

Gastropoda · Chromodorididae
GBIF
Last seen:
4 Feb 2026
×1records

Halgerda indotessellata

Gastropoda · Discodorididae
GBIF
Last seen:
4 Feb 2026
×1records

Ancylocaris brevicarpalis

Malacostraca · Palaemonidae
GBIF
Last seen:
3 Feb 2026
×1records

Phyllidiopsis gemmata

Gastropoda · Phyllidiidae
GBIF
Last seen:
3 Feb 2026
×1records

Stenopus hispidus

Malacostraca · Stenopodidae
GBIF
Last seen:
3 Feb 2026
×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.

Diving Big Wall, Mnemba, off Nungwi, Zanzibar

Vance Stevens

Big Wall! Zanzibar 2020

Want To Sea The World

Swimming on Big Wall, Zanzibar 2020

Want To Sea The World
wind peaks Jul-Aug-Sep, calmest Nov-Apr-Dec, dry Jan-Dec.

5-year monthly climate

60 samples
0 5 10 15 20 25 JFMAMJJASOND
p25–p75 range Median Wind (kn) Air (°C)
Visibility (month-by-month)
Best: Mar (100/100) Worst: Jun (0/100) Now: Sep (25/100) NOAA MODIS Aqua · 5y mean

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