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

13

-

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

Mon

14

-

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

Tue

15

-

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

Wed

16

-

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

Thu

17

-

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

Fri

18

-

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

Sat

19

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

Sun

20

-

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

Mon

21

-

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

Tue

22

-

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

Wed

23

-

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

Thu

24

-

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

Fri

25

-

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

Sat

26

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

Sun

27

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

BULLETIN

(established in local time)

Reliability 80%

No gale warning.

Sunday 13 july

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)

30

20

10

0

50

40

30

20

10

0

15

10

5

0

30

20

10

0

10

5

0

0.5

0

9

6

3

0

40

30

20

10

100

90

80

70

60

50

Mon 14

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

70° E ENE
55° NE NE
40° NE NE
25° NE NNE
15° N NNE
355° N N
335° NW NNW
310° NW NW
295° NW WNW
280° W W
275° W W
275° W W
270° W W
255° W WSW
240° SW WSW
240° SW WSW
230° SW SW
235° SW SW
245° SW WSW
240° SW WSW
230° SW SW
230° SW SW
230° SW SW
230° SW SW

3 6 2 4 2
4 7 2 4 2
5 9 3 6 2
5 9 3 6 2
4 7 2 4 2
5 9 3 6 2
9 16 4 10 3
7 13 4 8 3
9 16 4 10 3
11 20 6 12 4
13 24 7 15 4
12 22 6 14 4
10 19 5 12 3
8 15 4 9 3
8 14 4 9 3
10 18 5 11 3
10 18 5 11 3
9 17 5 11 3
10 19 5 12 3
9 17 5 11 3
10 18 5 11 3
9 16 4 10 3
12 22 6 14 4
13 25 7 16 4

6 12 3 7 3
8 14 4 9 3
8 15 4 9 3
9 16 4 10 3
12 22 6 14 4
11 20 6 12 4
15 27 8 17 4
13 25 7 16 4
15 27 8 17 4
17 31 9 19 5
22 41 11 25 6
21 39 11 24 6
19 35 10 22 5
16 29 8 18 5
13 24 7 15 4
16 29 8 18 5
15 27 8 17 4
16 30 8 19 5
18 33 9 21 5
18 33 9 21 5
16 30 8 19 5
18 33 9 21 5
20 37 10 23 5
22 40 11 25 6

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

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

0
0
0
0
0
0
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.3
0.3
0.2
0.2
0.3
0.3

35° NE NE
35° NE NE
30° NE NNE
30° NE NNE
35° NE NE
35° NE NE
30° NE NNE
30° NE NNE
30° NE NNE
25° NE NNE
15° N NNE
190° S S
185° S S
180° S S
180° S S
175° S S
180° S S
180° S S
340° N NNW
335° NW NNW
325° NW NW
325° NW NW
330° NW NNW
335° NW NNW

0.3
0.3
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.1

3
3
3
3
3
3
3
3
4
4
3
3
3
4
4
4
4
4
6
6
5
5
6
6

20
20
20
20
20
20
20
20
25
25
10
15
15
15
15
15
45
60
10
10
15
15
10
10

9.5
8.0
6.1
4.3
3.0
2.5
3.0
4.6
6.8
8.9
10.4
10.8
10.2
8.7
6.8
4.8
3.2
2.3
2.3
3.6
5.6
7.8
9.6
10.5

21 69
21 70
21 70
22 71
22 71
22 72
22 72
22 72
22 72
22 71
21 71
21 70
21 70
21 70
21 70
21 70
21 70
21 70
21 70
21 70
21 69
21 69
21 69
21 69

0
0
5
40
50
85
85
60
95
75
85
75
40
30
70
50
50
80
75
45
35
5
5
25

0
0
0
0
0
3.4
2.2
1.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

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

0
0
0
0
40
65
70
50
25
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

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

1010
1010
1009
1009
1008
1009
1010
1010
1010
1010
1011
1011
1012
1013
1013
1013
1013
1013
1013
1015
1015
1015
1015
1015

4
6
7
7
7
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2

24 75
24 76
25 77
25 77
25 76
24 75
22 72
23 74
23 73
22 72
21 70
20 68
19 67
18 65
18 64
17 63
17 63
17 63
17 63
17 62
16 61
17 63
19 65
20 68

33 91
34 94
34 93
35 94
31 87
27 80
24 76
26 79
24 76
22 72
20 68
19 66
16 60
16 60
15 59
14 57
14 56
14 57
14 56
13 56
13 55
15 59
17 62
22 72

5 9 2 3 6
5 10 2 3 6
5 10 2 3 6
8 14 3 4 9
6 11 2 3 7
5 9 2 3 6
6 11 2 3 7
5 10 2 3 6
11 20 4 6 12
15 27 4 8 17
16 30 5 8 19
15 27 4 8 17
15 27 4 8 17
13 24 4 7 15
11 21 4 6 13
12 23 4 6 14
13 25 4 7 16
14 26 4 7 16
15 27 4 8 17
16 30 5 8 19
15 28 4 8 17
13 24 4 7 15
12 22 4 6 14
12 23 4 6 14

0.4
0.4
0.4
0.3
0.3
0.3
0.3
0.3
0.3
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.6
0.7
0.6
0.6
0.6

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

Expert opinion

A southeasterly and mostly variable flow prevails over the North of the basin. Over the South, it is westerly and moderate.

For Grève de Saint Marc :
No gale warning.

We are 80% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will begin.

Sun in the morning, sunny, progressively clouding over in the afternoon. No precipitation in the morning, showers late in the day. In the evening, good clear periods but lots of cloud, too.
Showers becoming less frequent. ENE force 2 turning NNE force 3 in the middle of the day then W force 4. Gusts reaching 22 knots in the evening. Smooth to slight sea becoming smooth in the middle of the day. Low, short swell from NE. Excellent visibility.

Tides at Saint-Quay-Portrieux

80

Low tide 03h48 2.3m

High tide 09h35 10.44m

81

Low tide 16h05 2.49m

High tide 21h49 10.82m

www.shom.fr - © SHOM 2025

Consult the tides for July

Sun

13

-

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

Mon

14

-

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

Tue

15

-

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

Wed

16

-

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

Thu

17

-

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

Fri

18

-

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

Sat

19

-

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

Sun

20

-

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

Mon

21

-

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

Tue

22

-

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

Wed

23

-

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

Thu

24

-

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

Fri

25

-

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

Sat

26

-

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

Sun

27

-

- 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