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

Wed

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Mon

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BULLETIN

(* established in local time)

Reliability 85%

Wind alert - Warning fresh gale offshore.

Wednesday 21 jan

METEO CONSULT Run : 20/01 16Z Mesh : 1km Updated, 8h ago Update imminent

Wind

Average winds

Gusts

10m above ground level:

Direction

Speed

Gusts

Waves

Total sea (m) (m)

Swell (m) (m)

Total sea (m)

Wind (m)

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)

50

40

30

20

10

80

70

60

50

40

30

20

25

20

15

10

5

50

40

30

20

10

5

0

1

0.5

0

9

6

3

0

15

10

5

0

55

50

45

40

35

                                    
                                                                         Thu 22
                                                            
                    02h
                
                    03h
                
                    04h
                
                    05h
                
                    06h
                
                    07h
                
                    08h
                
                    09h
                
                    10h
                
                    11h
                
                    12h
                
                    13h
                
                    14h
                
                    15h
                
                    16h
                
                    17h
                
                    18h
                
                    19h
                
                    20h
                
                    21h
                
                    22h
                
                    23h
                
                    00h
                
                    01h
                
                        Run : 20/01 16Z
                Mesh : 1km
                Updated, 8h ago
                Update imminent

Thu 22

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

175° S S
170° S SSE
160° S SSE
155° SE SSE
160° S SSE
170° S S
175° S S
175° S S
175° S S
175° S S
170° S S
170° S S
170° S S
170° S SSE
170° S S
175° S S
175° S S
175° S S
165° S SSE
165° S SSE
160° S SSE
150° SE SSE
155° SE SSE
150° SE SSE

11 20 6 12 4
12 22 6 14 4
12 22 6 14 4
14 26 7 16 4
17 32 9 20 5
20 37 10 23 5
24 44 12 27 6
25 46 13 29 6
24 45 13 28 6
24 45 13 28 6
24 44 12 27 6
24 44 12 27 6
23 42 12 26 6
21 39 11 24 6
19 36 10 22 5
15 28 8 17 4
15 27 8 17 4
13 25 7 16 4
15 28 8 17 4
13 25 7 16 4
13 25 7 16 4
14 26 7 16 4
13 24 7 15 4
12 23 6 14 4

17 32 9 20 5
19 36 10 22 5
17 32 9 20 5
22 41 11 25 6
28 51 14 32 7
32 60 17 37 7
40 75 21 47 9
42 78 22 48 9
43 79 22 49 9
42 78 22 48 9
40 74 21 46 8
40 74 21 46 8
39 73 20 45 8
36 67 19 42 8
34 63 18 39 8
32 59 16 37 7
28 52 14 32 7
25 46 13 29 6
25 47 13 29 6
25 46 13 29 6
24 44 12 27 6
24 44 12 27 6
23 42 12 26 6
22 40 11 25 6

0.5
0.5
0.6
0.6
0.6
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
0.4

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

185° S S
185° S S
185° S S
185° S S
190° S S
275° W W
230° SW SW
230° SW SW
185° S S
190° S S
190° S S
190° S S
190° S S
190° S S
190° S S
190° S S
235° SW SW
235° SW SW
230° SW SW
275° W W
185° S S
185° S S
190° S S
190° S S

0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.4
0.3
0.4

13
13
13
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11

260
250
230
220
210
190
190
180
180
170
170
160
160
130
130
130
130
140
130
130
120
120
160
150

2.7
2.4
3.2
5.1
7.4
9.5
10.7
10.8
10.0
8.3
6.3
4.3
2.8
2.1
2.5
4.0
6.2
8.5
10.2
10.7
10.2
8.8
6.8
4.8

9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48
9 48

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
95
90
90
85
85
75
95
90
95

0.1
7
0
0
0.2
0.2
0.1
0.1
0.6
0.5
0.4
0.4
0.2
0.1
0.3
0.5
0.5
0
0
0
0
0
0
0

-
-
-
-

100
100
0
30
50
70
75
80
90
90
85
65
50
50
70
65
55
20
0
0
0
20
35
40

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

15
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20

999
998
996
994
992
990
989
988
988
987
986
985
984
983
982
982
982
982
982
982
982
982
982
982

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

6 43
7 44
7 45
8 46
9 48
10 50
10 50
10 51
10 51
11 51
11 51
11 51
11 51
11 52
11 52
11 52
10 51
10 50
10 50
9 49
9 49
9 49
9 49
9 49

3 37
3 37
3 37
3 38
3 38
4 38
3 37
3 37
3 38
3 38
4 39
4 39
4 40
5 41
5 41
6 43
5 42
6 42
5 41
5 40
5 40
5 40
5 41
5 41

17 31 5 9 19
17 32 5 9 20
18 33 5 9 21
20 37 5 10 23
24 45 6 13 28
27 50 7 14 31
30 55 7 15 34
32 59 7 16 37
33 61 7 17 38
32 59 7 16 37
32 59 7 16 37
31 57 7 16 35
30 56 7 16 35
29 53 7 15 33
26 49 6 14 30
24 45 6 13 28
22 40 6 11 25
20 37 5 10 23
21 39 6 11 24
19 36 5 10 22
20 37 5 10 23
20 37 5 10 23
21 38 5 11 24
19 36 5 10 22

1
1
1.1
1.2
1.4
1.7
1.8
1.8
1.9
1.8
1.8
1.7
1.6
1.5
1.4
1.3
1.3
1.2
1.2
1.1
1.1
1
1
1

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

Expert opinion

Low 971 hPa centered at 110 nautical miles in the South-West of Fastnet Rock (South-West Ireland) moving at 20 knots to the North-North-East and rising to 978 hPa to be centered on the North of Ireland.

For Grève de Saint Marc :
Warning fresh gale offshore.

The reliability of the situation is assessed at 85%.

Overcast skies. Light showers followed by rain in the morning, light rain followed by showers in the afternoon. In the evening, very cloudy.
Light showers progressively becoming less frequent. S force 6 in the morning weakening force 4 in the evening. Gusts reaching 43 knots in the morning. Slight sea becoming smooth to slight in the evening. Low, fairly long swell from SW. Excellent visibility.

Tides at Saint-Quay-Portrieux

84

Low tide 02h49 2.34m

High tide 08h34 10.94m

85

Low tide 15h12 2.09m

High tide 20h56 10.71m

www.shom.fr - © SHOM 2026

Consult the tides for January

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Wed

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

Thu

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

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* +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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