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

14

-

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

Mon

15

-

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

Tue

16

-

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

Wed

17

-

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

Thu

18

-

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

Fri

19

-

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

Sat

20

-

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

Sun

21

-

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

Mon

22

-

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

Tue

23

-

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

Wed

24

-

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

Thu

25

-

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

Fri

26

-

- 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

BULLETIN

(established in local time)

Reliability 90%

Wind alert - Warning strong breeze offshore.

Sunday 14 december

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)

25

20

15

10

5

50

40

30

20

10

15

10

5

0

30

20

10

0

10

5

0

0.5

0

3

0

15

10

5

0

55

50

45

40

35

Mon 15

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

200° S SSW
195° S SSW
180° S S
180° S S
175° S S
180° S S
180° S S
170° S SSE
180° S S
190° S S
180° S S
175° S S
175° S S
170° S S
170° S S
175° S S
170° S S
175° S S
175° S S
175° S S
175° S S
175° S S
170° S S
170° S S

6 11 3 7 2
8 15 4 9 3
6 12 3 7 3
8 15 4 9 3
8 14 4 9 3
9 16 4 10 3
9 17 5 11 3
9 16 4 10 3
10 19 5 12 3
9 17 5 11 3
10 19 5 12 3
10 19 5 12 3
10 18 5 11 3
10 18 5 11 3
12 22 6 14 4
15 27 8 17 4
14 26 7 16 4
15 27 8 17 4
13 25 7 16 4
14 26 7 16 4
13 24 7 15 4
12 22 6 14 4
12 23 6 14 4
13 24 7 15 4

11 20 6 12 4
14 26 7 16 4
9 17 5 11 -
15 27 8 17 4
11 20 6 12 4
15 28 8 17 4
16 30 8 19 5
15 28 8 17 4
17 32 9 20 5
18 33 9 21 5
18 33 9 21 5
19 35 10 22 5
17 32 9 20 5
17 31 9 19 5
20 37 10 23 5
23 43 12 27 6
24 44 12 27 6
24 44 12 27 6
23 43 12 27 6
23 42 12 26 6
24 44 12 27 6
23 42 12 26 6
23 42 12 26 6
23 42 12 26 6

0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4

0.8
0.8
0.8
0.8
0.8
0.9
0.8
0.8
0.8
0.8
0.8
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9

0
0
0.1
0.1
0.1
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2

245° SW WSW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
275° W W
185° S S
200° S SSW
185° S S
185° S S
185° S S
185° S S
230° SW SW
230° SW SW
230° SW SW
215° SW SW
200° S SSW
190° S S

0.4
0.4
0.4
0.4
0.4
0.4
0.3
0.3
0.3
0.3
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4

13
13
12
12
12
11
12
12
11
11
11
11
11
11
11
11
11
11
11
11
11
11
10
10

270
260
250
230
210
170
190
180
170
180
180
170
170
170
170
160
150
150
150
150
150
160
160
160

6.8
5.8
4.9
4.4
4.4
4.9
6.0
7.2
8.2
8.8
8.8
8.3
7.4
6.3
5.2
4.4
4.1
4.3
5.2
6.3
7.6
8.5
8.9
8.7

12 53
12 53
12 53
11 53
11 53
11 53
11 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
11 53
11 53
11 53
11 53
12 53
12 53
12 53
12 53

0
85
65
85
75
90
85
55
95
95
95
95
90
100
100
95
95
95
100
100
100
100
90
90

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
4
10
10
15
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20

1024
1024
1023
1023
1023
1023
1022
1022
1020
1019
1019
1018
1017
1017
1016
1016
1015
1014
1014
1013
1012
1011
1010
1009

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

6 43
6 44
6 42
6 43
6 42
7 44
8 47
10 50
11 51
11 52
11 52
11 52
11 51
10 51
10 50
10 50
9 49
9 48
9 48
9 49
9 49
10 49
10 49
10 49

4 40
4 38
3 37
3 38
3 37
4 39
6 42
8 46
8 47
9 49
8 47
8 46
7 45
7 45
6 43
5 41
5 40
4 40
5 40
5 40
5 41
5 42
5 41
5 41

11 21 4 6 13
12 23 4 6 14
12 22 4 6 14
13 25 4 7 16
12 23 4 6 14
15 27 4 8 17
16 30 5 8 19
15 27 4 8 17
15 28 4 8 17
15 28 4 8 17
15 28 4 8 17
16 29 5 8 18
17 31 5 9 19
18 34 5 9 21
19 36 5 10 22
22 40 6 11 25
22 40 6 11 25
23 42 6 12 26
23 42 6 12 26
22 40 6 11 25
21 39 6 11 24
20 37 5 10 23
21 39 6 11 24
22 40 6 11 25

0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.9
0.9
1
1.1
1.1
1.1
1
1
1
1.1

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

Expert opinion

A southerly, very strong and variable flow prevails over the whole area.

For Grève de Saint Marc :
Warning strong breeze offshore.

The reliability of the situation is assessed at 90%.

Very cloudy skies with short clear spells. No precipitation. In the evening, very cloudy skies to overcast.
No precipitation. S force 3 in the morning becoming force 4 in the evening. Gusts reaching 24 knots in the evening. Smooth to slight sea. Low, fairly long swell from SW. Visibility reduced by mist becoming excellent in the middle of the day.

Tides at Saint-Quay-Portrieux

44

High tide 02h05 8.74m

Low tide 08h32 4.28m

45

High tide 14h27 8.88m

Low tide 21h08 4.1m

www.shom.fr - © SHOM 2025

Consult the tides for December

Sun

14

-

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

Mon

15

-

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

Tue

16

-

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

Wed

17

-

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

Thu

18

-

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

Fri

19

-

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

Sat

20

-

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

Sun

21

-

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

Mon

22

-

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

Tue

23

-

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

Wed

24

-

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

Thu

25

-

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

Fri

26

-

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

Sat

27

-

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

Sun

28

-

- 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