Skip to content
OpenWaterAtlas
Silhouette of two scuba divers sharing a moment underwater in a bright blue ocean scene.
📷 Markos Torpillas · Pexels

Nautilus-SUB

4.0 — based on 22 community signals
4.3 12 species 35 contributors

Nautilus-SUB is a year-round dive destination in Portugal with documented marine species observations and community footage.

⭐ Best for intermediate divers.

updated 4 months ago
Shore entryFamily-friendly

At a glance

Activity
dive
Best months
Year-round
Marine life
Bottlenose dolphin

Top operators here

See all operators ↓

Map

This spot Operators Airport Nearby spots
Nautilus-SUB location map © Google · Map data © Google, contributors
Open in Google Maps

Conditions today

Conditions

Open-Meteo
Wind
0.8 kn
Wave
0.94 m
Water
16.3°C
N E S W
Wind direction (7d)
Primary: WSW (25%)
Now: NE (45°)
Tide (7 days)
range: 2.63m

Today: High 08:00 (+0.13m), Low 15:00 (-0.74m)

+1.0 m0 m-1.7 m
▲ 08:00 · +0.13m ▼ 15:00 · -0.74m ▲ 21:00 · -0.08m ▼ 03:00 · -0.69m Now -0.6m
Sat 19Sun 20Mon 21Tue 22Wed 23Thu 24Fri 25
UV6.5 · high Air PM2.59 · good 07:21 19:38
Day Wind Wave UV Rain
09-19 5.1 0.98 7 0mm
09-20 5 0.88 6 0mm
09-21 5.7 0.84 6 0mm
09-22 4.6 0.82 6 0mm
09-23 5.1 1.12 6 0mm
09-24 4.7 1.1 6 0mm
09-25 6.7 1 6 0mm

About this spot

Nautilus-SUB offers diving access in Portugal without the restrictions of a marine protected area. The site has generated enough interest to attract 12 species observations and 3 community videos, suggesting solid marine biodiversity and accessible conditions for divers. The year-round availability means you can plan a trip on your schedule. Portugal's Atlantic coast draws divers seeking temperate-water experience with varied topography and marine life. Nautilus-SUB fits that profile for exploratory dives. Conditions like depth, visibility, and water temperature aren't documented here, so contact local operators or review the community videos before booking. These resources will give you realistic expectations and help you pack the right exposure suit and gear. The presence of multiple species records and video documentation suggests the site supports healthy marine habitats worth visiting.

📖 Guide: 10 Best Diving Spots in Portugal

Best months

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

Marine life

Bottlenose dolphin

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

Quick facts

  • 🌓 Moon First quarter · 49%
  • GPS
Sustainability disclosures
🌍 CO2 footprint LHR ↔ 1579km · ~363kg · €7

From your departure country

United States
Origin score: 77/100
  • Visa: Visa-free · 90 days max
  • Flight: 7h · direct
  • Jet-lag: 5h east · 4 days recovery

FAQ

When's the best time to dive Nautilus-SUB?

Nautilus-SUB is open year-round, so you can dive whenever it fits your schedule. Check with local operators for seasonal weather patterns and sea conditions before booking your trip.

What depth and difficulty level is Nautilus-SUB?

Depth and difficulty ratings aren't documented for this site. Review the available community videos and ask local dive operators for specifics before your dive.

What marine life will I see at Nautilus-SUB?

The site has 12 documented species observations. Watch the 3 community videos available online to see what divers have encountered, and ask local guides about current activity.

Do I need permits or special access to dive Nautilus-SUB?

Nautilus-SUB is not inside a marine protected area, so standard dive access applies. Contact local dive operators in Portugal to confirm any entry requirements or booking procedures.

Operators near this spot

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

Escola de Mergulho de Lisboa

8.6 km
Dive centre

Fonte da Telha

8.6 km
Kite school

Recently spotted by divers

iNaturalist →

Verified marine species observations

22 records · 15 species · sources: OBIS, GBIF

Anomia ephippium

Bivalvia · Anomiidae
GBIF
Last seen:
14 Jan 2026
×1records

Physella acuta

Gastropoda · Physidae
GBIF
Last seen:
10 Jan 2026
×1records

Mimachlamys varia

Bivalvia · Pectinidae
GBIF
Last seen:
4 Jan 2026
×7records

Carcinus maenas

Malacostraca · Carcinidae
GBIF
Last seen:
4 Jan 2026
×2records

Testacella maugei

Gastropoda · Testacellidae
GBIF
Last seen:
4 Jan 2026
×1records

Magallana gigas

Bivalvia · Ostreidae
GBIF
Last seen:
4 Jan 2026
×1records

Cymbium olla

Gastropoda · Volutidae
GBIF
Last seen:
3 Jan 2026
×1records

Aporrhais pespelecani

Gastropoda · Aporrhaidae
GBIF
Last seen:
3 Jan 2026
×1records

Octopus vulgaris

Cephalopoda · Octopodidae
GBIF
Last seen:
3 Jan 2026
×1records

Pecten maximus

Bivalvia · Pectinidae
GBIF
Last seen:
3 Jan 2026
×1records

Cabestana cutacea

Gastropoda · Cymatiidae
GBIF
Last seen:
3 Jan 2026
×1records

Modiolus barbatus

Bivalvia · Mytilidae
GBIF
Last seen:
3 Jan 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.

Mergulho Sesimbra - Nautilus-Sub

Bruno Paixao
💬 3 top comments
  • #VimPeloSeuFilho

    @gabidelas · 👍 1
  • #vimpeloseufilho

    @dredgamer1853 · 👍 1
  • #VimpeloSeufilho

    @prodz-tion4426 · 👍 1

Mergulho Sesimbra Baleeiras - Nautilus-sub

Bruno Paixao

NAUTILUS LIVE 2011 | Summary of Portugal Leg 6

EVNautilus
💬 1 top comments
  • Nice! How did you finance your expeditions?

    @tatodeleon1 · 👍 0
wind peaks Mar-May-Jun, calmest Oct-Nov-Feb, dry Jan-Dec.

5-year monthly climate

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

Nearby spots

Surfing
🇵🇹 Portugal

Costa da Caparica — Praia do Tarquínio

Beginner-friendly beach break on Portugal's Costa da Caparica with reliable shallow waves and sandy bottom.

Beginner 0–4m Jun·Jul·Aug+
Fonte da Telha Portugal Kitesurfing
🇵🇹 Portugal

Fonte da Telha

Fonte da Telha is a year-round kite destination on Portugal's Setúbal Peninsula, offering consistent conditions for all skill levels.

Intermediate Jan·Feb·Mar+
Praia de Carcavelos Portugal Surfing
🇵🇹 Portugal

Praia de Carcavelos

Carcavelos is a year-round Portuguese beach break with consistent swell and easy access near Lisbon.

Beginner Jan·Feb·Mar+

Similar spots

Same activity, shared marine species or similar profile.

Presepe degli Abissi di Albisola Italy Diving
🇮🇹 Italy

Presepe degli Abissi di Albisola

Presepe degli Abissi di Albisola is a protected dive site in Italy's Sanctuaire Pelagos, offering year-round access to Mediterranean marine life.

Intermediate Jan·Feb·Mar+
Palestra subacquea Arenzano Italy Diving
🇮🇹 Italy

Palestra subacquea Arenzano

Palestra subacquea Arenzano is a year-round dive site in Italy's Sanctuaire Pelagos marine protected area, offering 12 documented species observations.

Beginner
ASD POSIDONIA Italy Diving
🇮🇹 Italy

ASD POSIDONIA

ASD Posidonia is a year-round dive site in Genoa, Italy, protected within the Sanctuaire Pelagos marine reserve.

Beginner Jan·Feb·Mar+
Secca di Fonza Italy Diving
🇮🇹 Italy

Secca di Fonza

Secca di Fonza is a protected dive site in Italy's Sanctuaire Pelagos marine reserve, offering year-round diving access.

Jan·Feb·Mar+

Suggest an operator

Know a great dive shop, kite school, or local guide at this spot? Tell us — we'll review and add it.

Up to 500 characters
Plan
View →