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

Thu

30

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

Fri

31

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Sat

01

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Sun

02

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Mon

03

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Tue

04

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Wed

05

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Thu

06

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Fri

07

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Sat

08

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Sun

09

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Mon

10

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

Tue

11

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Wed

12

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Thu

13

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BULLETIN

(established in local time)

Reliability 90%

Wind alert - Warning moderate gale offshore.

Thursday 30 october

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

15

10

5

40

30

20

10

5

0

1

0.5

0

3

0

20

15

10

5

65

60

55

50

45

Fri 31

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

175° S S
165° S SSE
175° S S
180° S S
175° S S
175° S S
175° S S
180° S S
185° S S
185° S S
180° S S
180° S S
180° S S
175° S S
175° S S
175° S S
180° S S
190° S S
190° S SSW
195° S SSW
200° S SSW
200° S SSW
205° SW SSW
205° SW SSW

16 30 8 19 5
16 29 8 18 5
18 33 9 21 5
18 34 9 21 5
19 36 10 22 5
18 34 9 21 5
17 32 9 20 5
16 30 8 19 5
16 30 8 19 5
15 27 8 17 4
13 25 7 16 4
13 24 7 15 4
12 23 6 14 4
12 22 6 14 4
12 22 6 14 4
12 23 6 14 4
12 22 6 14 4
15 28 8 17 4
16 29 8 18 5
17 32 9 20 5
19 35 10 22 5
19 35 10 22 5
19 36 10 22 5
18 34 9 21 5

30 55 15 34 7
26 48 13 30 6
29 54 15 34 7
31 57 16 35 7
32 60 17 37 7
31 58 16 36 7
30 56 16 35 7
29 54 15 34 7
29 53 15 33 7
28 51 14 32 7
26 48 13 30 6
23 43 12 27 6
21 39 11 24 6
22 40 11 25 6
22 41 11 25 6
22 40 11 25 6
26 48 13 30 6
27 50 14 31 7
27 50 14 31 7
29 54 15 34 7
31 57 16 35 7
30 56 16 35 7
31 58 16 36 7
31 57 16 35 7

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

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

0.2
0.2
0.2
0.2
0.2
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

230° SW SW
235° SW SW
235° SW SW
235° SW SW
235° SW SW
230° SW SW
235° SW SW
60° NE ENE
60° NE ENE
55° NE NE
55° NE NE
235° SW SW
235° SW SW
235° SW SW
235° SW SW
235° SW SW
235° SW SW
235° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW
230° SW SW

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

9
9
9
9
9
9
9
9
9
9
10
10
11
12
13
13
13
13
13
13
13
13
13
13

120
120
110
110
80
80
90
90
90
90
120
130
150
160
190
210
220
210
210
210
210
210
210
210

5.6
5.2
5.0
5.2
5.7
6.4
7.0
7.6
7.9
7.8
7.5
6.9
6.2
5.6
5.3
5.2
5.5
6.1
6.8
7.5
8.1
8.3
8.1
7.5

15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59
15 59

95
95
70
95
85
100
100
100
100
95
65
100
100
85
100
100
100
95
85
40
40
50
40
70

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

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

0
0
0
0
0
30
55
65
45
30
0
0
0
0
0
25
40
40
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

1005
1004
1004
1004
1004
1003
1003
1003
1003
1003
1003
1003
1003
1002
1002
1002
1002
1002
1002
1002
1002
1001
1001
1001

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
2
1
1
0

14 57
14 57
14 57
14 58
14 57
14 58
14 58
14 58
14 58
15 58
14 58
14 58
15 58
14 58
15 58
15 59
15 59
16 60
16 61
17 62
17 63
18 64
18 64
17 62

9 48
9 47
8 47
8 47
8 46
8 47
9 47
9 48
9 48
10 49
10 49
10 50
10 50
10 50
10 51
10 51
11 51
11 52
13 55
14 56
14 58
15 58
14 57
12 54

22 40 6 11 25
22 40 6 11 25
23 42 6 12 26
25 46 6 13 29
26 49 6 14 30
26 48 6 13 30
25 46 6 13 29
24 44 6 12 27
23 42 6 12 26
22 40 6 11 25
21 38 5 11 24
21 38 5 11 24
19 35 5 10 22
19 35 5 10 22
19 35 5 10 22
19 35 5 10 22
18 34 5 9 21
21 39 6 11 24
20 37 5 10 23
20 37 5 10 23
21 39 6 11 24
21 38 5 11 24
21 39 6 11 24
21 38 5 11 24

1.1
1
1
1.1
1.1
1.1
1.1
1.1
1
1
0.9
0.8
0.8
0.8
0.9
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 gale prevails over the South and the West of the basin. Over the North-East, a northwesterly, moderate and mostly variable flow prevails at sea.

For Grève de Saint Marc :
Warning moderate gale offshore.

We are 90% sure of the situation, because the strength of the precipitation is difficult to assess for this type of disturbance.

Overcast skies. No precipitation. In the evening, very cloudy skies becoming totally overcast.
Light, intermittent drizzle. S wind force 5 from the middle of the day. Gusts reaching 32 knots in the evening. Smooth to slight sea. Low, fairly long swell from SW. Excellent visibility.

Tides at Saint-Quay-Portrieux

31

Low tide 05h58 5.2m

High tide 12h09 8.01m

Low tide 18h58 5.01m

www.shom.fr - © SHOM 2025

Consult the tides for October

Thu

30

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

Fri

31

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

Sat

01

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

Sun

02

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

Mon

03

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

Tue

04

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

Wed

05

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

Thu

06

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

Fri

07

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

Sat

08

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

Sun

09

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

Mon

10

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

Tue

11

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

Wed

12

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

Thu

13

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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