Weather Grève de Saint Marc - Detailed bulletin - Free 15-day Marine forecasts

Tréveneuc (22411)Longitude : -2°51’,1836 W Latitude : 48°40’,014 N Altitude : 0m

Thu

18

-

- nd - km/h - bft - m/s - mph

Fri

19

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- nd - km/h - bft - m/s - mph

Sat

20

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- nd - km/h - bft - m/s - mph

Sun

21

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- nd - km/h - bft - m/s - mph

Mon

22

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- nd - km/h - bft - m/s - mph

Tue

23

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- nd - km/h - bft - m/s - mph

Wed

24

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- nd - km/h - bft - m/s - mph

Thu

25

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- nd - km/h - bft - m/s - mph

Fri

26

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- nd - km/h - bft - m/s - mph

Sat

27

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- nd - km/h - bft - m/s - mph

Sun

28

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- nd - km/h - bft - m/s - mph

Mon

29

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- nd - km/h - bft - m/s - mph

Tue

30

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- nd - km/h - bft - m/s - mph

Wed

01

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- nd - km/h - bft - m/s - mph

Thu

02

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BULLETIN

(established in local time)

Reliability 95%

No gale warning.

Thursday 18 september

Wind

Average winds

Gusts

10m above ground level:

Direction

Speed

Gusts

Waves

Total sea (m) (m)

Swell height (m) (m)

Total sea (m)

Total wave height (m)

Wind (m)

Swell direction

Swell height (m)

Swell period (s)

Wave length (m)

High tide (m)

Sea temp

Weather

Rain (mm) (mm)

Cloud cover(%)

Amount of precipitation(mm)

Type of precipitation

Precipitation risk(%)

Visibility(km)

Pressure(hPa)

UV

Temperature

Air temp

Perceived temp

Air temp

Perceived temp

Offshore

Offshore wind

Offshore sea (m)

20

15

10

5

0

40

30

20

10

0

10

5

0

20

15

10

5

0

10

5

0

0.5

0

3

0

30

25

20

15

10

90

80

70

60

50

Fri 19

06h
07h
08h
09h
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
20h
21h
22h
23h
00h
01h
02h
03h
04h
05h

210° SW SSW
210° SW SSW
205° SW SSW
210° SW SSW
215° SW SSW
210° SW SSW
210° SW SSW
205° SW SSW
210° SW SSW
215° SW SW
210° SW SSW
210° SW SSW
210° SW SSW
260° W W
315° NW NW
325° NW NW
275° W W
195° S SSW
190° S S
195° S SSW
190° S SSW
175° S S
175° S S
180° S S

6 12 3 7 3
7 13 4 8 3
8 14 4 9 3
8 14 4 9 3
9 17 5 11 3
9 16 4 10 3
8 15 4 9 3
8 15 4 9 3
9 16 4 10 3
8 15 4 9 3
9 16 4 10 3
7 13 4 8 3
5 9 3 6 2
2 4 1 2 1
2 3 1 2 1
2 3 1 2 1
1 2 1 1 1
1 2 1 1 1
3 6 2 4 2
4 7 2 4 2
5 9 3 6 2
5 9 3 6 2
5 10 3 6 2
5 9 3 6 2

12 22 6 14 4
13 24 7 15 4
13 25 7 16 4
14 26 7 16 4
16 30 8 19 5
16 30 8 19 5
16 29 8 18 5
15 28 8 17 4
16 29 8 18 5
16 29 8 18 5
15 28 8 17 4
15 27 8 17 4
12 23 6 14 4
10 18 5 11 3
8 14 4 9 3
8 15 4 9 3
8 14 4 9 3
6 12 3 7 3
6 11 3 7 -
5 10 3 6 -
6 12 - 7 3
7 13 4 8 3
8 15 4 9 3
8 14 4 9 3

0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.2
0.2

0.9
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.7
0.7
0.7
0.7
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.5
0.5
0.5
0.5

0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0

225° SW SW
230° SW SW
185° S S
185° S S
185° S S
185° S S
230° SW SW
230° SW SW
230° SW SW
230° SW SW
270° W W
270° W W
270° W W
230° SW SW
275° W W
230° SW SW
195° S SSW
185° S S
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
350° N N

0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.2
0.2

10
11
10
10
11
11
11
11
10
11
10
10
10
10
11
10
10
9
10
10
10
10
10
10

140
170
160
150
160
140
160
140
150
160
130
150
170
180
180
180
180
170
170
170
170
160
160
160

9.0
8.4
7.3
6.0
4.8
4.0
3.8
4.3
5.4
6.9
8.4
9.3
9.6
9.1
8.0
6.5
5.0
3.8
3.1
3.2
4.1
5.7
7.5
9.0

18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
19 65
18 65
18 65

90
95
90
85
95
80
75
80
75
65
35
40
35
35
35
50
35
10
20
15
15
20
20
5

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

5
10
15
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
10
10
5
5
5
5
5
10
15

1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1021
1021
1020
1020
1021
1021
1021
1021
1021
1021
1020
1020
1019
1018

0
0
0
0
0
1
2
2
3
3
3
2
1
0
0
0
0
0
0
0
0
0
0
0

17 62
17 63
17 62
17 63
18 65
19 67
21 69
21 70
22 72
23 73
23 74
24 74
23 74
22 72
20 68
19 66
18 64
17 62
16 61
15 60
15 58
14 58
14 58
14 58

15 58
15 58
14 57
15 59
17 62
19 65
24 75
26 78
27 80
28 82
28 82
28 82
27 80
26 78
23 73
18 64
17 63
16 61
15 59
14 57
13 55
13 55
12 54
13 55

11 21 4 6 13
13 24 4 7 15
12 22 4 6 14
12 22 4 6 14
12 22 4 6 14
11 20 4 6 12
10 18 3 5 11
9 17 3 5 11
8 15 3 4 9
8 14 3 4 9
7 13 3 4 8
6 12 3 3 7
4 8 2 2 5
3 5 1 1 3
3 5 1 1 3
0 0 0 0 0
2 3 1 1 2
2 3 1 1 2
3 5 1 1 3
4 7 2 2 4
5 10 2 3 6
6 12 3 3 7
7 13 3 4 8
6 12 3 3 7

0.7
0.7
0.7
0.7
0.7
0.7
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.4

Forecasts established in local time
Last updated 2h ago | Next update in 1h
Caption

Expert opinion

A southwesterly, strong and mostly variable flow prevails over the whole area.

For Grève de Saint Marc :
No gale warning.

The reliability of the situation is assessed at 95%.

Very cloudy. But clear spells will become more and more widespread. No precipitation. In the evening, lots of good clear periods.
No precipitation. SSW force 3 in the morning turning W force 2 in the evening. Gusts reaching 16 knots in the morning. Smooth to slight sea. Low, fairly long swell from SW. Poor visibility becoming excellent in the middle of the day then poor.

Tides at Saint-Quay-Portrieux

54

High tide 05h28 9.09m

Low tide 11h52 3.78m

61

High tide 17h49 9.61m

www.shom.fr - © SHOM 2025

Consult the tides for September

Thu

18

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- nd - km/h - bft - m/s - mph

Fri

19

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- nd - km/h - bft - m/s - mph

Sat

20

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Sun

21

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- nd - km/h - bft - m/s - mph

Mon

22

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- nd - km/h - bft - m/s - mph

Tue

23

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- nd - km/h - bft - m/s - mph

Wed

24

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- nd - km/h - bft - m/s - mph

Thu

25

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- nd - km/h - bft - m/s - mph

Fri

26

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- nd - km/h - bft - m/s - mph

Sat

27

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- nd - km/h - bft - m/s - mph

Sun

28

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- nd - km/h - bft - m/s - mph

Mon

29

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- nd - km/h - bft - m/s - mph

Tue

30

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- nd - km/h - bft - m/s - mph

Wed

01

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- nd - km/h - bft - m/s - mph

Thu

02

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- nd - km/h - bft - m/s - mph

* +33 1 77 86 86 86: short number of forecasts for France accessible from France - €2.99 per call** 0899 70 12 34: number of forecasts for France and the World accessible from France - €2.99 per call

Weather beach Grève de Saint Marc

BULLETIN

Wind

Waves

Weather

Temperature

Offshore

Expert opinion

Tides at Saint-Quay-Portrieux