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

Sun

23

-

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

Mon

24

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

Tue

25

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

Wed

26

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

Thu

27

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

Fri

28

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

Sat

29

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

Sun

30

-

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

Mon

01

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

Tue

02

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

Wed

03

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

Thu

04

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

Fri

05

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

Sat

06

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

Sun

07

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

BULLETIN

(established in local time)

Reliability 90%

Wind alert - Warning moderate gale offshore.

Sunday 23 november

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)

40

30

20

10

70

60

50

40

30

20

10

20

15

10

5

50

40

30

20

10

5

0

1

0.5

0

3

0

15

10

5

0

55

50

45

40

35

30

Mon 24

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

280° W W
280° W W
275° W W
265° W W
255° W WSW
245° SW WSW
245° SW WSW
245° SW WSW
245° SW WSW
240° SW WSW
240° SW WSW
240° SW WSW
245° SW WSW
245° SW WSW
250° W WSW
245° SW WSW
250° W WSW
250° W WSW
250° W WSW
250° W WSW
255° W WSW
255° W WSW
260° W W
270° W W

11 21 6 13 4
13 25 7 16 4
12 23 6 14 4
11 20 6 12 4
11 20 6 12 4
11 20 6 12 4
11 20 6 12 4
11 21 6 13 4
10 19 5 12 3
10 19 5 12 3
12 22 6 14 4
11 21 6 13 4
12 22 6 14 4
13 24 7 15 4
13 25 7 16 4
14 26 7 16 4
15 27 8 17 4
15 27 8 17 4
16 29 8 18 5
16 29 8 18 5
18 33 9 21 5
21 38 11 24 5
21 39 11 24 6
21 38 11 24 5

19 35 10 22 5
21 39 11 24 6
21 38 11 24 5
18 33 9 21 5
18 33 9 21 5
17 31 9 19 5
18 33 9 21 5
19 35 10 22 5
17 32 9 20 5
17 32 9 20 5
19 35 10 22 5
18 34 9 21 5
18 34 9 21 5
19 36 10 22 5
23 43 12 27 6
25 47 13 29 6
24 45 13 28 6
24 45 13 28 6
26 48 13 30 6
25 47 13 29 6
28 52 14 32 7
32 59 16 37 7
35 65 18 40 8
36 66 18 41 8

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

1
1.1
1.1
1
1
1
1
1.1
1.1
1
1
1
1
1
1
1
1
1.1
1.2
1.2
1.3
1.5
1.5
1.7

0.2
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.1
0.2
0.2
0.2
0.2
0.3
0.3
0.4

180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
180° S S
185° S S
185° S S
180° S S
180° S S
180° S S
225° SW SW
225° SW SW
180° S S
180° S S
185° S S
185° S S

0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.6
0.7
0.7
0.8

6
5
5
5
5
5
5
6
7
7
7
7
7
7
8
8
8
8
7
8
8
8
9
8

50
45
40
45
50
50
50
60
80
90
90
100
110
90
90
90
100
90
90
90
100
120
140
130

3.1
2.8
3.5
5.0
7.0
8.8
10.0
10.1
9.3
8.0
6.3
4.7
3.5
3.1
3.6
4.9
6.8
8.6
9.9
10.2
9.6
8.4
6.8
5.2

13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55
13 55

100
80
85
85
95
90
90
100
100
100
100
100
95
55
45
30
35
90
60
75
45
75
85
100

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
1.6

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

0
0
0
0
0
0
0
0
20
20
0
0
0
0
0
0
0
25
35
30
25
35
50
80

>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20

1006
1006
1005
1005
1005
1004
1004
1004
1003
1003
1002
1002
1001
1001
1000
999
999
998
998
997
997
996
996
996

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0

11 51
12 53
11 52
10 50
9 49
9 48
9 48
8 47
8 47
8 47
8 47
8 47
8 47
8 46
8 46
7 45
7 45
7 45
7 45
7 45
8 47
9 48
9 49
9 49

7 44
8 46
7 45
7 44
6 42
5 41
5 41
4 40
5 40
5 40
4 40
4 40
4 39
4 38
3 37
3 37
2 36
2 36
2 35
2 36
3 38
4 39
3 38
4 40

19 36 5 10 22
22 41 6 11 25
22 41 6 11 25
21 38 5 11 24
20 37 5 10 23
18 34 5 9 21
18 33 5 9 21
19 35 5 10 22
18 33 5 9 21
18 34 5 9 21
19 35 5 10 22
19 35 5 10 22
19 35 5 10 22
20 37 5 10 23
21 39 6 11 24
19 36 5 10 22
22 40 6 11 25
24 45 6 13 28
22 41 6 11 25
24 44 6 12 27
23 43 6 12 27
28 51 7 14 32
29 53 7 15 33
28 51 7 14 32

1.3
1.3
1.3
1.3
1.3
1.3
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.3
1.3
1.4
1.4
1.5
1.7
1.8
2
2.2
2.4

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

Expert opinion

Low 983 hPa centered to the West of Scotland moving at 15 knots to the East-South-East to be centered on the North of the Irish Sea.

For Grève de Saint Marc :
Warning moderate gale offshore.

We are 90% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.

Very cloudy skies to overcast. Chance of light rain. In the evening, very cloudy skies becoming totally overcast.
Chance of light rain. W wind force 4 from the middle of the day. Gusts reaching 21 knots in the middle of the day. Smooth to slight sea. Low, short swell from S. Excellent visibility.

Tides at Saint-Quay-Portrieux

70

Low tide 02h33 2.79m

High tide 08h16 10.52m

68

Low tide 14h52 2.77m

High tide 20h35 10.15m

www.shom.fr - © SHOM 2025

Consult the tides for November

Sun

23

-

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

Mon

24

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

Tue

25

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

Wed

26

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

Thu

27

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

Fri

28

-

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

Sat

29

-

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

Sun

30

-

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

Mon

01

-

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

Tue

02

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

Wed

03

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

Thu

04

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

Fri

05

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

Sat

06

-

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

Sun

07

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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