Exsurgence de Port-Miou
Dive site · France
Is it worth the trip?
75Good out of 100 for your dates
3 days tie for best
Mon 2 · 78 out of 100
- Sea
- 0.2 mflat
- Wind
- 4 kn
- Gusts
- 9kn
- Air
- 14°C
Tue 3 · 79 out of 100
- Sea
- 0.2 mflat
- Wind
- 1 kn
- Gusts
- 5kn
- Air
- 15°C
Wed 4 · 68 out of 100
- Sea
- 0.5 m
- Wind
- 12 kn
- Gusts
- 18kn
- Air
- 15°C
Thu 5 · 55 out of 100
- Sea
- 0.8 m
- Wind
- 17 kn
- Gusts
- 24kn
- Air
- 17°C
Fri 6 · 66 out of 100
- Sea
- 0.4 m
- Wind
- 4 kn
- Gusts
- 7kn
- Air
- 16°C
Sat 7 · 79 out of 100
- Sea
- 0.1 mflat
- Wind
- 0 kn
- Gusts
- 8kn
- Air
- 16°C
Sun 8 · 79 out of 100
- Sea
- 0.1 mflat
- Wind
- 4 kn
- Gusts
- 9kn
- Air
- 16°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 10 days
Full forecast- Sun 180, good
- Mon 278, good
- Tue 379, good
- Wed 468, good
- Thu 555, fair
- Fri 666, good
- Sat 779, good
- Sun 879, good
- Mon 976, good
- Tue 1077, good
The site in four facts
- Down to 223 mits deepest
- Open Waterand up
- Water 18 °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 |
|---|---|---|---|---|---|
| Sun 1Nov | 80, good | 0.3 m | 1 kn | 6kn | 17°C |
| Mon 2Nov | 78, good | 0.2 mflat | 4 kn | 9kn | 14°C |
| Tue 3Nov | 79, good | 0.2 mflat | 1 kn | 5kn | 15°C |
| Wed 4Nov | 68, good | 0.5 m | 12 kn | 18kn | 15°C |
| Thu 5Nov | 55, fair | 0.8 m | 17 kn | 24kn | 17°C |
| Fri 6Nov | 66, good | 0.4 m | 4 kn | 7kn | 16°C |
| Sat 7Nov | 79, good | 0.1 mflat | 0 kn | 8kn | 16°C |
| Sun 8Nov | 79, good | 0.1 mflat | 4 kn | 9kn | 16°C |
| Mon 9Nov | 76, good | 0.3 m | 11 kn | 16kn | 17°C |
| Tue 10Nov | 77, good | 0.3 m | 3 kn | 9kn | 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
Tide
- Sun 1 NovLow 05:30 −0.1 mHigh 13:30 +0.1 mLow 21:46 −0.0 m
- Mon 2 NovHigh 00:53 −0.0 mLow 07:27 −0.1 mHigh 14:53 +0.1 mLow 22:44 −0.1 m
- Tue 3 NovHigh 03:14 −0.0 mLow 09:12 −0.1 mHigh 16:04 +0.1 mLow 23:26 −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.
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
- Feb7of 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 Mon 2 Nov
- Dec6of 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, its town, photos
Exsurgence de Port-Miou 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.
Photos of Exsurgence de Port-Miou
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More diving near here
5 places
- Émergence du Bestouan 1.9 km away
- Grand Congloué 9.5 km away
- Cala maussana 9.9 km away
- Bosse du Chameau 10.2 km away
- Impérial du Milieu 10.3 km away
About
the place in full, sources, credits
About Exsurgence de Port-Miou
A cave dive. It goes down to 223 m. 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. 3 dive centres or shops within 10 km, the nearest 2.3 km away. The sea is about 14°C in January, its coldest month (7 mm semi-dry or a drysuit), and 24°C in August, its warmest (5 mm wetsuit). The town to stay in is Cassis. Within 5 km we also list 1 surf spot, 1 wind sports spot, 3 dive sites and 1 climbing area.
- What it is Cave.
- How deep Down to 223 m: technical diving, past the 40 m recreational limit.
- Who it suits Suits Open Water divers and up, as a dive guide states it.
- Dive centres 3 dive centres or shops within 10 km, the nearest 2.3 km away.
Water about 18°C: 7 mm wetsuit and hood. Typical sea temperature for the time of year, not a forecast.
Visibility about 20 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 (about 25 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$1,170–US$2,210 each
about US$1,170–US$2,210 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
| What | How we worked it out | Each |
|---|---|---|
| Flights | return ORD to MRS, estimated from distance and season, changing at CDG, full-service airlines, with a hold bag | about US$496–US$1,030 |
| Taxi | airport and back, shared | about US$80–US$134 |
| Stay | 6 nights, a mid-range double, shared | about US$281–US$469 |
| Food | 7 days eating out | about US$315–US$583 |
| Total | about US$1,170–US$2,210 |
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: Cassis
4 min by car · 55 places to stay
about US$107/nightcountry average
About Cassis its beds, food and every spot near it
About US$107 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 17h 55m
About 17h 55m door to door from Chicago
Fly ORD → MRS, changing at Charles de Gaulle International Airport (CDG), then 55 min by road
Flights ORD → MRS on your dates · Skyscanner
An estimate, one way; the journey never changes the score.
In the water
Dives and courses in Cassis · GetYourGuideDive gear hire in Cassis · GetYourGuide
Dive centres nearby
Narval 2.3 km
Cassis Calanques Plongée 2.3 km
G.P.E.S. 8.5 km
Balanea 12 km
Atoll Plongée 12 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
Animals divers and surveys have recorded within 2 km of this site in the last 15 years. A record says someone saw it here, not that you will.
Echinocyamus pusillus
Seen in 4 records.
Genocidaris maculata
Seen in 4 records.
Ophiura albida
Seen in 4 records.
Ophiura ophiura
Seen in 4 records.
Records: OBIS (Ocean Biodiversity Information System, IOC-UNESCO), from the datasets named here, CC0 and CC BY records only. Names: WoRMS, through OBIS; common names from Wikidata. Largest datasets here: QUADRIGE - Coastal monitoring database and products, 1974 onwards. (6064); QUADRIGE - Coastal monitoring database and products, 1974 onwards. (6064). Credits
This week: visibility about 20 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 no free forecast gives. Ask a dive centre before you book.