Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Lostmarc'h surfForecast / Brittany – Finistere / France
48hr Weather and Surf, issued 6 pm Wednesday 17 Dec 2025 CETForecast update in hr min s Forecast update imminent
Lostmarc'h surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lostmarc'h sea temperature is
12.4° C
(Which is normal for this time of year)How big are the waves at Lostmarc'h today?
The current surf forecast for Lostmarc'h at 3AM is: 3.0m 22s primary swell from a West direction and 4.0m 12s secondary swell from a West-southwest direction, 2.5m 8s secondary swell from a South-southwest direction (forecast issued at 06:00pm December 17). The wind direction is predicted to be cross-onshore.
| Time (CET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 20ft (6.0m) | 20s |
| Afternoon (18 Dec) | 20ft (6.0m) | 19s |
| Evening (18 Dec) | 20ft (6.0m) | 18s |
Table - waves today at Lostmarc'h. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 12 | 12 | 22 | 21 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 15 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2652 | 3116 | 2713 | 2984 | 8133 | 27709 | 28109 | 27156 | 24987 | 23152 | 20582 | 21643 | 20573 | 18980 | 18029 | 19653 | 19549 | 17210 | 12870 | 10179 | 8047 | 6274 | 5772 | 5105 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 3:15PM 4.44 | 3:33AM 4.64 | 3:53PM 4.61 | 4:10AM 4.82 | 4:30PM 4.74 | 4:46AM 4.95 | ||||||||||||||||||
Low Tide / height (m) | 9:26PM 1.17 | 9:50AM 1.06 | 10:05PM 1.02 | 10:28AM 0.90 | 10:42PM 0.90 | 11:05AM 0.78 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 9:03 | - | - | - | - | - | - | - | 9:03 | - | - | - | - | - | - | - | 9:04 | - |
| Sunset | 5:23 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - | 5:24 | - | - | - | - | - | - | - |
 |  | | | | |  | |  |  |  | |  |  |  | | | | | | | | | | |
Rain (mm) | 1 | 1 | 4 | 2 | 3 | 4 | 7 | 8 | - | 6 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 11 | 11 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels °C (?) | 1 | 1 | 1 | 3 | 7 | 6 | 1 | -2 | 7 | 6 | 5 | 4 | 4 | 4 | 6 | 6 | 7 | 6 | 6 | 4 | 2 | 2 | 2 | 1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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