Le Grande Bleu
Dive site · Greece
Is it worth the trip?
76Good out of 100 for your dates
Best on Mon 2: Sea: flat, Visibility about 25 m, Water 20 °C
Mon 2 · 85 out of 100
- Sea
- 0.2 mflat
- Wind
- 5 kn
- Gusts
- 8kn
- Air
- 21°C
Tue 3 · 79 out of 100
- Sea
- 0.5 m
- Wind
- 9 kn
- Gusts
- 11kn
- Air
- 21°C
Wed 4 · 83 out of 100
- Sea
- 0.5 m
- Wind
- 6 kn
- Gusts
- 8kn
- Air
- 20°C
Thu 5 · 77 out of 100
- Sea
- 0.5 m
- Wind
- 15 kn
- Gusts
- 22kn
- Air
- 18°C
Fri 6 · 23 out of 100
- Sea
- 0.9 m
- Wind
- 23 kn
- Gusts
- 33knboats in
- Air
- 16°C
Sat 7 · 68 out of 100
- Sea
- 0.9 m
- Wind
- 21 kn
- Gusts
- 29knboats in
- Air
- 16°C
Sun 8 · 81 out of 100
- Sea
- 0.4 m
- Wind
- 13 kn
- Gusts
- 21kn
- Air
- 16°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 10 days
Full forecast- Mon 285, good
- Tue 379, good
- Wed 483, good
- Thu 577, good
- Fri 623, poor
- Sat 768, good
- Sun 881, good
- Mon 986, good
- Tue 1087, good
- Wed 1183, good
The site in five facts
- Down to 20 mits deepest
- From a boathow you get in
- Open Waterand up
- Water 20 °C7 mm wetsuit and hood
- Faces Sswell 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 Open Water divers and up, as a dive guide states it. Scored for Advanced divers.
| Day | Score | Sea | Wind | Gusts | Air |
|---|---|---|---|---|---|
| Mon 2Nov | 85, good | 0.2 mflat | 5 kn | 8kn | 21°C |
| Tue 3Nov | 79, good | 0.5 m | 9 kn | 11kn | 21°C |
| Wed 4Nov | 83, good | 0.5 m | 6 kn | 8kn | 20°C |
| Thu 5Nov | 77, good | 0.5 m | 15 kn | 22kn | 18°C |
| Fri 6Nov | 23, poor | 0.9 m | 23 kn | 33knboats in | 16°C |
| Sat 7Nov | 68, good | 0.9 m | 21 kn | 29knboats in | 16°C |
| Sun 8Nov | 81, good | 0.4 m | 13 kn | 21kn | 16°C |
| Mon 9Nov | 86, good | 0.1 mflat | 5 kn | 10kn | 17°C |
| Tue 10Nov | 87, good | 0.0 mflat | 4 kn | 8kn | 18°C |
| Wed 11Nov | 83, good | 0.3 m | 11 kn | 16kn | 19°C |
Sea is the waves near the site, in metres; wind and gusts in knots. "Boats in": gusts that keep dive boats in. More
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.
Best time to go
No month stands out
Good diving days in a typical week, each month, for Advanced divers, from 2016 on (ERA5 history scored the same way).
- Jan6of 7: a trip from Sat 2 Jan
- Feb6of 7: a trip from Sat 6 Feb
- Mar7of 7: a trip from Sat 6 Mar
- Apr7of 7: a trip from Sat 3 Apr
- May7of 7: a trip from Sat 1 May
- Jun7of 7: a trip from Sat 5 Jun
- Jul7of 7: a trip from Sat 3 Jul
- Aug7of 7: a trip from Sat 7 Aug
- Sep7of 7: a trip from Sat 4 Sept
- Oct7of 7: a trip from Sat 2 Oct
- Nov7of 7: a trip from Tue 3 Nov
- Dec7of 7: a trip from Sat 5 Dec
Tap a month to see this spot for a trip then.
Typical, not a forecast: the sea and the mean wind of each day, with no gusts or rain in the history.
Map
the site and its town
Le Grande Bleu on Google Maps · Directions
Each place wears its best day on these dates: green good, amber fair, pale red poor, as the key says.
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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
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About
the place in full, sources, credits
About Le Grande Bleu
A reef dive. It goes down to 20 m. You get in from a boat. It suits Open Water divers and up, as a dive guide states it. The coast faces S: swell from the S reaches it, and wind from the N blows out to sea. No dive centre within 10 km, the nearest 13 km away. The sea is about 17°C in January, its coldest month (7 mm wetsuit and hood), and 25°C in August, its warmest (3 mm wetsuit). The town to stay in is Ios.
- What it is Reef.
- How deep Down to 20 m.
- Getting in From a boat.
- Who it suits Suits Open Water divers and up, as a dive guide states it.
- Dive centres No dive centre within 10 km, the nearest 13 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 and Sep (over 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$1,110–US$2,140 each
about US$1,110–US$2,140 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 2 November 2026.
How we worked it out
| What | How we worked it out | Each |
|---|---|---|
| Flights | return ORD to JTR, estimated from distance and season, changing at CDG, full-service airlines, with a hold bag | about US$597–US$1,230 |
| Taxi | airport and back, shared | about US$67–US$114 |
| Stay | 6 nights, a mid-range double, shared | about US$208–US$349 |
| Food | 7 days eating out | about US$235–US$443 |
| Total | about US$1,110–US$2,140 |
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: Ios
Ad Links marked Ad may pay us if you book. You pay the same, and they never change a score. How we earn
about 25 min by car · 91 places to stay
about US$81/nightcountry average
About Ios its beds, food and every spot near it
About US$81 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 2 November 2026.
Getting there: about 20h
About 20h door to door from Chicago
Fly ORD → JTR, changing at Charles de Gaulle International Airport (CDG), then 50 min by road
Flights ORD → JTR on your dates · AviasalesAdeSIM for your phone · Search on AiraloAd
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Ios · GetYourGuideDive gear hire in Ios · GetYourGuide
Dive centres nearby
Go Dive 13 km
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's visibility, the current and the life no free forecast gives. Ask a dive centre before you book.
Saved: this link opens the same trip
The link holds the trip itself: nothing about you is kept. Check the forecast again before you book.