Staying Home Sucks, home
Stairs to Grotto di Nettuno - panoramio
Near Nereo Cave. Photo: trolvag, CC BY-SA 3.0, Wikimedia Commons

Nereo Cave

Dive site · Italy

Experienced divers only

Is it worth the trip?

84Good out of 100 for your dates

Home sucks

Best on Sat 7: Sea: flat, Visibility about 25 m, Water 20 °C

Each day of your trip, out of 100

Mon 2 · 75 out of 100

Sea
0.8 m
Wind
19 kn
Gusts
24kn
Air
19°C

Tue 3 · 83 out of 100

Sea
0.4 m
Wind
1 kn
Gusts
4kn
Air
19°C

Wed 4 · 84 out of 100

Sea
0.2 mflat
Wind
3 kn
Gusts
4kn
Air
21°C

Thu 5 · 84 out of 100

Sea
0.3 m
Wind
2 kn
Gusts
11kn
Air
21°C

Fri 6 · 84 out of 100

Sea
0.2 mflat
Wind
2 kn
Gusts
6kn
Air
19°C

Sat 7 · 85 out of 100

Sea
0.1 mflat
Wind
2 kn
Gusts
6kn
Air
19°C

Sun 8 · 84 out of 100

Sea
0.1 mflat
Wind
3 kn
Gusts
9kn
Air
19°C

Tap a day for sea, wind and water. Full forecast

Forecast: next 10 days

Full forecast
  1. Sun 183, good
  2. Mon 275, good
  3. Tue 383, good
  4. Wed 484, good
  5. Thu 584, good
  6. Fri 684, good
  7. Sat 785, good
  8. Sun 884, good
  9. Mon 983, good
  10. Tue 1081, good

The site in five facts

  • Down to 35 mits deepest
  • From a boathow you get in
  • Experienced / deepexperienced divers only
  • Water 20 °C7 mm wetsuit and hood
  • Faces SWswell from there reaches it

Full forecast

every day, every number

The score doesn't know currents, the visibility on the day or your certification.

Suits experienced divers only, as a dive guide states it. Scored for experienced divers.

Sea and wind forecast and score for each day at Nereo Cave
DayScoreSeaWindGustsAir
Sun 1Nov83, good0.3 m11 kn15kn19°C
Mon 2Nov75, good0.8 m19 kn24kn19°C
Tue 3Nov83, good0.4 m1 kn4kn19°C
Wed 4Nov84, good0.2 mflat3 kn4kn21°C
Thu 5Nov84, good0.3 m2 kn11kn21°C
Fri 6Nov84, good0.2 mflat2 kn6kn19°C
Sat 7Nov85, good0.1 mflat2 kn6kn19°C
Sun 8Nov84, good0.1 mflat3 kn9kn19°C
Mon 9Nov83, good0.2 mflat7 kn12kn20°C
Tue 10Nov81, good0.4 m14 kn24kn21°C

Sea is the waves near the site, in metres; wind and gusts in knots. "Boats in": gusts that keep dive boats in. More

Tide

  • Sun 1 NovLow 06:19 −0.1 mHigh 13:40 +0.1 mLow 21:18 −0.0 m
  • Mon 2 NovHigh 00:57 +0.0 mLow 07:41 −0.1 mHigh 15:08 +0.1 mLow 22:35 −0.0 m
  • Tue 3 NovHigh 03:58 +0.0 mLow 09:15 −0.0 mHigh 16:30 +0.1 mLow 23:30 −0.1 m

Local clock times; heights about mean sea level. On open coasts the times are usually within a quarter of an hour; in bays, estuaries and on the Gulf of Mexico they can be an hour or more out. Slack water, the safest time to dive where there is current, is about half an hour either side of each high and low. Tide: EOT20 global ocean tide model, Hart-Davis et al. 2021, DGFI-TUM (doi:10.17882/79489), CC BY 4.0. Times and heights computed by us. A model, not a tide table: check a local table before you go.

Forecast updated . It refreshes every three hours. Forecast data: ECMWF, DWD, Météo-France and NOAA, served by Open-Meteo.com (CC BY 4.0). Changed by us. Generated using E.U. Copernicus Marine Service Information.

Map

the site and its town

Each place wears its best day on these dates: green good, amber fair, pale red poor, as the key says.

The map needs JavaScript. Every place on it is listed on this page, and each place's page links to Google Maps.

One finger scrolls the page; two fingers move the map. Pins are our own positions. Map OpenFreeMap, © OpenMapTiles, data © OpenStreetMap contributors.

More diving near here

2 places

About

the place in full, sources, credits

About Nereo Cave

A cave dive. It goes down to 35 m. You get in from a boat. It suits experienced divers only, as a dive guide states it. The coast faces SW: swell from the SW reaches it, and wind from the NE blows out to sea. 2 dive centres or shops within 10 km, the nearest 3.6 km away. The sea is about 14°C in February, its coldest month (7 mm semi-dry or a drysuit), and 26°C in August, its warmest (3 mm wetsuit). The town to stay in is Argentiera. Within 5 km we also list 1 wind sports spot and 2 dive sites.

  • What it is Cave.
  • How deep Down to 35 m.
  • Getting in From a boat.
  • Who it suits Suits experienced divers only, as a dive guide states it.
  • Dive centres 2 dive centres or shops within 10 km, the nearest 3.6 km away.

Water about 20°C: 7 mm wetsuit and hood. Typical sea temperature for the time of year, not a forecast.

Visibility about 25 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jun, Jul, Aug, Sep and Oct (about 30 m).

The score is the conditions only: the journey, the price and the partners never change it (how we score, how we earn).

Rough cost (estimate): about US$1,120–US$2,130 each

about US$1,120–US$2,130 each · 6 nights, 2 sharing: flights, taxi, stay, food.

Our estimate from typical public prices, not a quote: check the real prices before you book (where they come from). Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 30 October 2026.

How we worked it out 
Rough cost per person for this trip
WhatHow we worked it outEach
Flightsreturn ORD to AHO, estimated from distance and season, changing at DUB, full-service airlines, with a hold bagabout US$516–US$1,070
Taxiairport and back, sharedabout US$33–US$54
Stay6 nights, a mid-range double, sharedabout US$268–US$449
Food7 days eating outabout US$301–US$563
Totalabout US$1,120–US$2,130

Guided dives are not priced yet: we have no sourced price, so it is not in it. Prices from public sources, checked in 2026.

Where to stay: Argentiera

Closest

Argentiera

35 min by car · 6 places to stay

about US$100/nightcountry average

See 6 places to stay in Argentiera · Booking.com

About Argentiera its beds, food and every spot near it

About US$100 a night is our estimate of the country's average 2-star double room that month: not each town's price, and not a quote. Drives are estimates. Prices are about, in US Dollar (USD): our pound figures at the European Central Bank's rate of 30 October 2026.

Getting there: about 18h

About 18h door to door from Chicago

Fly ORD → AHO, changing at Dublin Airport (DUB), then 35 min by road

An estimate, one way; the journey never changes the score.

In the water

Dive centres nearby

The nearest named dive centres and shops within 25 km, in a straight line; training agencies where the map states them. Listings, not a recommendation. Dive centres: © OpenStreetMap contributors (ODbL). Credits

What you might see

Too few open records near this site to list its animals. Ask a dive centre what you are likely to see.

This week: visibility about 25 m, about usual for the month (satellite plankton reading, 24 Oct). Estimated from the month's typical visibility and this week's satellite chlorophyll against the site's normal; heavy rain before a dive can still muddy it.

The current and the life no free forecast gives. Ask a dive centre before you book.