G.M.A.P.
Dive site · France
Is it worth the trip?
65Good out of 100 for your dates
3 days tie for best
Tue 3 · 64 out of 100
- Sea
- 0.1 mflat
- Wind
- 11 kn
- Gusts
- 20kn
- Air
- 12°C
Wed 4 · 64 out of 100
- Sea
- 0.2 mflat
- Wind
- 11 kn
- Gusts
- 23kn
- Air
- 9°C
Thu 5 · 65 out of 100
- Sea
- 0.1 mflat
- Wind
- 5 kn
- Gusts
- 14kn
- Air
- 11°C
Fri 6 · 66 out of 100
- Sea
- 0.1 mflat
- Wind
- 3 kn
- Gusts
- 9kn
- Air
- 12°C
Sat 7 · 66 out of 100
- Sea
- 0.0 mflat
- Wind
- 3 kn
- Gusts
- 9kn
- Air
- 11°C
Sun 8 · 66 out of 100
- Sea
- 0.0 mflat
- Wind
- 3 kn
- Gusts
- 9kn
- Air
- 11°C
Mon 9 · 62 out of 100
- Sea
- 0.2 mflat
- Wind
- 12 kn
- Gusts
- 23kn
- Air
- 13°C
Tap a day for sea, wind and water. Full forecast
Forecast: next 9 days
Full forecast- Mon 265, good
- Tue 364, good
- Wed 464, good
- Thu 565, good
- Fri 666, good
- Sat 766, good
- Sun 866, good
- Mon 962, good
- Tue 1064, good
The site in four facts
- Open Waterand up
- Water 14 °C7 mm semi-dry or a drysuit
- Faces Sswell from there reaches it
- Best May–Aug7 good days in 7
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 | 65, good | 0.1 mflat | 6 kn | 14kn | 13°C |
| Tue 3Nov | 64, good | 0.1 mflat | 11 kn | 20kn | 12°C |
| Wed 4Nov | 64, good | 0.2 mflat | 11 kn | 23kn | 9°C |
| Thu 5Nov | 65, good | 0.1 mflat | 5 kn | 14kn | 11°C |
| Fri 6Nov | 66, good | 0.1 mflat | 3 kn | 9kn | 12°C |
| Sat 7Nov | 66, good | 0.0 mflat | 3 kn | 9kn | 11°C |
| Sun 8Nov | 66, good | 0.0 mflat | 3 kn | 9kn | 11°C |
| Mon 9Nov | 62, good | 0.2 mflat | 12 kn | 23kn | 13°C |
| Tue 10Nov | 64, good | 0.2 mflat | 6 kn | 22kn | 13°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
- Mon 2 NovLow 04:03 −1.6 mHigh 10:17 +1.7 mLow 16:55 −1.7 mHigh 23:07 +1.4 m
- Tue 3 NovLow 05:28 −1.5 mHigh 11:43 +1.7 mLow 18:18 −1.7 m
- Wed 4 NovHigh 00:31 +1.5 mLow 06:47 −1.6 mHigh 13:01 +1.8 mLow 19:28 −1.9 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
best May–Aug
Good diving days in a typical week, each month, for Advanced divers, from 2016 on (ERA5 history scored the same way).
- Jan5of 7: a trip from Sat 2 Jan
- Feb4of 7: a trip from Sat 6 Feb
- Mar5of 7: a trip from Sat 6 Mar
- Apr6of 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
- Sep6of 7: a trip from Sat 4 Sept
- Oct6of 7: a trip from Sat 2 Oct
- Nov5of 7: a trip from Tue 3 Nov
- Dec4of 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
G.M.A.P. 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.
About
the place in full, sources, credits
About G.M.A.P.
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. 4 dive centres or shops within 10 km, the nearest 3.4 km away. The sea is about 10°C in February, its coldest month (7 mm semi-dry or a drysuit), and 16°C in July, its warmest (7 mm wetsuit and hood). For Advanced divers the best months are usually May, June, July and August, with about 7 good days in 7; in February and December, about 4. From the weather of past years. The town to stay in is Brest. Within 5 km we also list 1 surf spot and 3 wind sports spots.
- What it is No source states what kind of site it is.
- How deep No source states how deep it goes.
- Who it suits Suits Open Water divers and up, as a dive guide states it.
- Dive centres 4 dive centres or shops within 10 km, the nearest 3.4 km away.
Water about 14°C: 7 mm semi-dry or a drysuit. Typical sea temperature for the time of year, not a forecast.
Visibility under 5 m. Typical for the time of year, estimated from ten years of NASA satellite water clarity, not a forecast. Clearest in Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct and Nov (under 5 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$1,060–US$2,000 each
about US$1,060–US$2,000 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 BES, estimated from distance and season, changing at DUB, full-service airlines, with a hold bag | about US$442–US$918 |
| Taxi | airport and back, shared | about US$20–US$33 |
| 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$1,060–US$2,000 |
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: Brest
Ad Links marked Ad may pay us if you book. You pay the same, and they never change a score. How we earn
about 5 min by car · 61 places to stay
about US$107/nightcountry average
About Brest 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 16h 20m
About 16h 20m door to door from Chicago
Fly ORD → BES, changing at Dublin Airport (DUB), then 30 min by road
Flights ORD → BES 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 Brest · GetYourGuideDive gear hire in Brest · GetYourGuide
Dive centres nearby
Csam Section Plongée 3.4 km
Club Subaquatique de l'Iroise 5.4 km
Arimair Plongée 9.7 km
Centre Activités Plongée 14 km
Maison de la plongée 22 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.