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

Tréveneuc (22411)Lon : -2°51’,1836 W Lat : 48°40’,014 N Alt : 0m

Mon

18

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Tue

19

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Wed

20

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Thu

21

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Fri

22

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Sat

23

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Sun

24

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Mon

25

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Tue

26

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Wed

27

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Thu

28

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Fri

29

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Sat

30

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Sun

31

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Mon

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BULLETIN

Reliability 85%

No gale warning.

No weather risk at the spot

Monday 18 may

METEO CONSULT Run : 18/05 00Z Mesh : 1km Updated, 3h ago Update in 3h

Wind

Average winds

Gusts

10m above ground level:

Direction

Speed

Gusts

Waves

Total sea (m) (m)

Swell (m) (m)

legend.title.wave_height

Total sea (m)

legend.title.wind_sea

Wind (m)

legend.title.swell

Swell direction

Swell height (m)

Swell period (s)

Wave length (m)

High tide (m)

Sea temp

Weather

Rain (mm) (mm)

Clouds:

Cloud cover (%)

Precipitation:

Amount of precipitation (mm)

Type of precipitation

Risks:

Precipitation risk (%)

Storm risk. (%)

Brightness:

Visibility (km)

Pressure (hPa)

UV

Temperature

Air temp

Perceived temp

Air temp

Perceived temp

Offshore

Offshore wind

Offshore sea (m)

30

20

10

0

60

50

40

30

20

10

15

10

5

40

30

20

10

5

0

0.5

0

3

0

20

15

10

5

65

60

55

50

45

                                    
                                                                         Tue 19
                                                            
                    21h
                
                    22h
                
                    23h
                
                    00h
                
                    01h
                
                    02h
                
                    03h
                
                    04h
                
                    05h
                
                    06h
                
                    07h
                
                    08h
                
                    09h
                
                    10h
                
                    11h
                
                    12h
                
                    13h
                
                    14h
                
                    15h
                
                    16h
                
                    17h
                
                    18h
                
                    19h
                
                    20h
                
                        Run : 18/05 00Z
                Mesh : 1km
                Updated, 3h ago
                Update in 3h

Tue 19

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

190° S SSW
190° S S
180° S S
185° S S
190° S S
190° S S
195° S SSW
190° S SSW
190° S S
190° S SSW
210° SW SSW
220° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
225° SW SW
225° SW SW
230° SW SW
230° SW SW
240° SW WSW
240° SW WSW
240° SW WSW
240° SW WSW

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

19 35 10 22 5
19 36 10 22 5
19 35 10 22 5
21 38 11 24 5
23 43 12 27 6
24 45 13 28 6
27 50 14 31 7
28 52 14 32 7
28 51 14 32 7
25 47 13 29 6
24 45 13 28 6
21 39 11 24 6
22 41 11 25 6
23 42 12 26 6
24 44 12 27 6
26 48 13 30 6
28 51 14 32 7
28 52 14 32 7
26 48 13 30 6
25 47 13 29 6
26 48 13 30 6
26 49 14 30 6
26 49 14 30 6
24 45 13 28 6

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
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3

0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
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

355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
0° 0 0
355° N N
355° N N
360° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N
355° N N

0.3
0.3
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
0.2
0.2
0.2
0.2
0.2

9
9
9
9
8
8
8
8
8
8
8
8
8
8
8
8
8
8
9
9
8
8
8
8

100
120
110
110
110
100
90
90
70
70
80
100
100
90
90
90
90
80
80
80
80
80
90
90

11.6
11.3
9.9
7.9
5.5
3.3
1.8
1.3
2.2
4.2
6.8
9.3
10.9
11.3
10.4
8.7
6.5
4.3
2.6
1.7
2.1
3.8
6.2
8.8

14 56
14 56
14 56
14 56
14 56
14 56
13 56
13 56
13 56
13 56
13 56
13 56
13 56
13 56
13 56
13 56
14 56
14 56
14 56
14 57
14 57
14 57
14 57
14 56

100
100
100
100
100
100
100
100
100
100
80
70
65
45
70
50
70
75
75
75
75
50
55
50

1.1
1.5
0.6
0.7
0.6
0.7
0.1
0
0.1
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0

-
-
-
-
-
-
-
-
-
-
-

100
100
85
90
90
70
55
40
55
65
45
30
0
0
0
0
0
0
20
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

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

1013
1013
1012
1012
1011
1011
1010
1010
1009
1009
1009
1009
1010
1010
1011
1011
1011
1012
1012
1012
1012
1013
1013
1014

0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
4
5
4
4
3
3
2
1
0

13 55
12 54
12 53
12 54
12 54
12 54
13 55
13 55
13 55
13 56
14 57
14 58
14 58
15 60
16 61
17 62
17 62
16 62
17 62
17 63
18 64
17 63
17 62
16 61

9 48
9 47
9 47
8 47
8 47
8 46
8 46
8 46
8 47
9 49
10 51
11 52
11 53
14 58
15 60
16 62
17 62
16 62
18 64
18 64
18 64
16 61
15 59
13 56

17 31 5 9 19
17 31 5 9 19
16 30 5 8 19
17 32 5 9 20
18 34 5 9 21
19 35 5 10 22
20 37 5 10 23
21 39 6 11 24
21 39 6 11 24
20 37 5 10 23
18 34 5 9 21
15 27 4 8 17
13 25 4 7 16
12 23 4 6 14
15 28 4 8 17
15 27 4 8 17
16 29 5 8 18
17 32 5 9 20
15 27 4 8 17
14 26 4 7 16
12 23 4 6 14
13 25 4 7 16
15 28 4 8 17
15 28 4 8 17

0.8
0.8
0.8
0.8
0.9
0.9
1
1
1
0.9
0.8
0.7
0.7
0.6
0.6
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.8

Forecasts established in local time
Caption Glossary

Expert opinion

A southeasterly, moderate and variable flow prevails over the North of the basin. Over the South, it is southwesterly, strong and very variable.

For Grève de Saint Marc :
No gale warning.

The reliability of the situation is assessed at 85%.

In the evening, overcast skies.
Rain. SSW wind force 3. Gusts reaching 19 knots in the evening. Smooth to slight sea. Low, fairly long swell from N. Excellent visibility.

Tides at Saint-Quay-Portrieux

99

Low tide 03h10 1.27m

High tide 08h57 11.52m

97

Low tide 15h30 1.42m

High tide 21h14 11.61m

www.shom.fr - © SHOM 2026 - Local times

Consult the tides for May

Go further

Mon

18

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

Tue

19

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

Wed

20

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

Thu

21

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

Fri

22

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

Sat

23

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

Sun

24

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

Mon

25

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

Tue

26

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

Wed

27

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

Thu

28

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

Fri

29

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

Sat

30

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

Sun

31

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

Mon

01

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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

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