Grande Trait Surf Forecast

/ Loire Atlantique (9 surf breaks) /

France (410 surf breaks)

Surf Forecasts:

Grande Trait surfForecast / Loire Atlantique / France

48hr Weather and Surf, issued 1 pm Wednesday 27 Aug 2025 CEST

Forecast update in hr min s Forecast update imminent

Grande Trait surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Grande Trait sea temperature is 19.0° C
(Which is normal for this time of year)

How big are the waves at Grande Trait today?

The current surf forecast for Grande Trait at 6PM is: 1.8m 14s primary swell from a West-southwest direction and 1.4m 14s secondary swell from a West-southwest direction (forecast issued at 01:00pm August 27). The wind direction is predicted to be onshore.

Time (CEST) & Date	Wave Height	Wave Period
Morning (27 Aug)	7ft (2.1m)	15s
Afternoon (27 Aug)	6ft (1.9m)	14s
Evening (27 Aug)	6ft (1.8m)	14s

Table - waves today at Grande Trait. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Wednesday 27					Thursday 28								Friday 29								Saturday 30
	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM
Rating (10 max)	0	0	0	1	1	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	WSW	WSW	WSW	WSW	W	W	W	W	W	WSW	WSW	WSW	WSW	WSW	WSW	WSW	WSW	W	W	WSW	WSW	WSW	WSW	WSW
Period(s) (?)	15	14	14	14	13	13	13	12	12	12	12	12	12	12	7	8	8	7	8	8	9	10	10	10
Wave Graph (?)
Energy (?)	1613	1419	2091	1884	2983	2856	972	799	870	876	876	890	976	985	374	437	484	491	509	509	506	579	813	714
Wind (km/h)	SW	SSW	SW	SW	WSW	NW	W	W	WSW	WSW	W	W	WSW	SW	WSW	W	W	W	W	W	WNW	W	W	WSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	on	on	on	cross- on	cross	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	on	on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on	cross- on
High Tide / height (m)				7:46PM 4.33					8:01AM 4.13				8:16PM 4.09				8:32AM 3.93				8:49PM 3.80
Low Tide / height (m)			2:13PM 0.41				2:34AM 0.53				2:49PM 0.67				3:09AM 0.83				3:27PM 0.98				3:47AM 1.16

	Wednesday 27					Thursday 28								Friday 29								Saturday 30
Sunrise	-	-	-	-	-	-	-	7:22	-	-	-	-	-	-	-	7:22	-	-	-	-	-	-	-	7:24
Sunset	-	-	-	9:00	-	-	-	-	-	-	-	8:58	-	-	-	-	-	-	-	8:55	-	-	-	-

Rain (mm)	-	-	-	1	2	-	-	-	2	2	1	-	-	-	4	3	1	1	-	1	-	-	-	-
Temp. °C	20	20	20	19	18	17	17	17	18	18	19	18	18	18	18	18	18	19	19	19	18	18	18	18
Feels °C (?)	17	17	17	17	16	14	14	14	14	13	14	13	14	14	12	14	14	14	14	15	15	15	16	16

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 Loire Atlantique

Wind Update Wind reports 14 km away suggest it is still onshore at Grande Trait (moderate winds from the SSW at Saint -Nazaire -Montoir). 2.2m 14s groundswell from the W with a 1.0m 14s groundswell from the WSW. 2 swells combining so expect closeout sets.
1 hour 27 minutes ago Grande Trait

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1 h 27 min ago

28 km/h

SSW

Onshore

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