Lostmarc'h Surf Forecast

/ Brittany – Finistere (75 surf breaks) /

France (410 surf breaks) / Lat Long: (48.21° N 4.56° W)

Surf Forecasts:

Lostmarc'h surfForecast / Brittany – Finistere / France

12 Day Weather and Surf, issued 7 pm Tuesday 16 Sep 2025 CEST

Forecast 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 16.8° C
(Which is normal for this time of year)

Best Forecast Surf Conditions for Lostmarc'h this week:

The surf forecast for Lostmarc'h over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 2AM. The primary swell is predicted to be 1.8m and 11s period with a secondary swell of 0.6m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Lostmarc'h in the next 12 days are 3.5m 11s and forecast to arrive on Sunday (Sep 21) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Tuesday (Sep 23) at 5AM.

Wave Type	Time (CEST) & Date	Wave Height & Period
Next good surf (1 star+)	2AM (Fri 19th Sep)	6ft (1.8m) 11s
Best Surf	2AM (Fri 19th Sep)	6ft (1.8m) 11s
Most Powerful	2PM (Sun 21st Sep)	11ft (3.5m) 11s

Table - best surf conditions forecast for Lostmarc'h over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Mostly dry. Very mild (max 18°C on Thu night, min 15°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue night, calm by Fri morning).										Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Sun night. Very mild (max 18°C on Fri night, min 12°C on Sun night). Winds increasing (light winds from the SW on Fri night, strong winds from the NE by Sun night).
		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tue 23
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	0	0	0	1	0	1	3	2	0	1	0	0	0	1	2	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	WNW	W	W	W	W	W	W	W	W	W	W	W	WNW	NW	NW	NNW	NNW	NNW	N	NNW	W
Period(s) (?)	11	10	10	13	12	11	11	10	10	10	9	9	9	10	10	8	7	7	6	6	15
Wave Graph (?)
kJ (?)	862	696	1045	2151	1480	1179	714	567	426	313	230	230	1258	2217	1572	692	294	163	47	39	19
Wind (km/h)	SSW	SSW	SSW	SSW	S	S	SE	SSE	SW	S	S	WNW	WNW	NW	N	NE	NE	NNE	NE	NNE	NNE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- off	cross	on	cross	cross- on	cross- on	cross- on	cross	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off
High Tide / height (m)	2:11AM 3.94		2:43PM 4.25	3:23AM 4.26		3:43PM 4.63	4:12AM 4.62		4:28PM 4.98	4:51AM 4.93		5:04PM 5.26		5:24AM 5.17	5:37PM 5.44		5:54AM 5.33	6:07PM 5.51		6:23AM 5.40	6:36PM 5.49
Low Tide / height (m)		8:18AM 1.69		9:04PM 1.35	9:28AM 1.35		10:01PM 0.98	10:17AM 0.98		10:43PM 0.65	10:57AM 0.67		11:19PM 0.41	11:32AM 0.44		11:51PM 0.26	12:04PM 0.31		12:22AM 0.21	12:34PM 0.28

		Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tue 23
Sunrise	-	7:56	-	-	7:58	-	-	7:58	-	-	8:00	-	-	8:02	-	-	8:03	-	-	8:04	-
Sunset	-	-	8:27	-	-	8:24	-	-	8:22	-	-	8:21	-	-	8:19	-	-	8:16	-	-	8:15

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	1	2	8	6	-	-	-	-
Temp. °C	16	16	16	17	17	17	18	17	17	18	17	17	15	13	13	13	13	14	14	13	14
Feels °C (?)	14	12	12	15	15	15	16	16	14	18	15	12	10	6	7	8	5	6	6	7	6

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Brittany - Finistere

Wind Update The wind is still cross-on at Lostmarc'h (light winds from the SSW at Lanveoc Poulmic Airport 12 km from Lostmarc'h). A 2.2m groundswell from the W
1 hour 44 minutes ago Lostmarc'h

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1 h 44 min ago

17 km/h

SSW

Cross-On

Please reload the page to see if there are any updates.

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Lostmarc'h surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Information about the Lostmarc'h Surf forecast

The above surf forecast table for Lostmarc'h provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Lostmarc'h can be found by selecting the local surf guide option on the grey menu. Our Lostmarc'h surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Lostmarc'h) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Lostmarc'h may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Lostmarc'h is 8 km (5 miles) from the city of Camaret-sur-Mer. If you plan a holiday in Finistere - Brittany, look for hotels and other accommodation in Camaret-sur-Mer. Camaret-sur-Mer has rooms for a wide range of budgets as well as car hire and transport links.