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

Sat

15

-

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

Sun

16

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

Mon

17

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

Tue

18

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

Wed

19

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

Thu

20

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

Fri

21

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

Sat

22

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

Sun

23

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

Mon

24

-

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

Tue

25

-

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

Wed

26

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

Thu

27

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

Fri

28

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

Sat

29

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

BULLETIN

(established in local time)

Reliability 85%

Wind alert - Warning strong breeze offshore.

Saturday 15 march

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)

35

30

25

20

15

60

50

40

30

20

15

10

5

40

35

30

25

20

15

10

5

0

5

0

3

0

10

5

0

-5

50

40

30

20

10

0

-10

Sun 16

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

40° NE NE
40° NE NE
40° NE NE
45° NE NE
55° NE NE
50° NE NE
50° NE NE
45° NE NE
45° NE NE
40° NE NE
45° NE NE
45° NE NE
40° NE NE
45° NE NE
40° NE NE
45° NE NE
50° NE NE
50° NE NE
45° NE NE
45° NE NE
45° NE NE
45° NE NE
45° NE NE
50° NE NE

18 34 9 21 5
19 36 10 22 5
21 38 11 24 5
20 37 10 23 5
20 37 10 23 5
19 35 10 22 5
18 34 9 21 5
18 33 9 21 5
18 33 9 21 5
17 31 9 19 5
16 29 8 18 5
15 28 8 17 4
17 31 9 19 5
17 32 9 20 5
18 33 9 21 5
18 34 9 21 5
19 35 10 22 5
18 34 9 21 5
17 32 9 20 5
17 31 9 19 5
17 31 9 19 5
17 32 9 20 5
18 33 9 21 5
18 34 9 21 5

28 52 14 32 7
31 57 16 35 7
31 57 16 35 7
29 53 15 33 7
29 54 15 34 7
28 52 14 32 7
27 50 14 31 7
26 49 14 30 6
26 49 14 30 6
25 47 13 29 6
24 44 12 27 6
23 42 12 26 6
24 45 13 28 6
25 47 13 29 6
26 48 13 30 6
25 47 13 29 6
26 49 14 30 6
27 50 14 31 7
26 48 13 30 6
25 47 13 29 6
25 46 13 29 6
25 46 13 29 6
25 47 13 29 6
26 48 13 30 6

1.2
1.3
1.3
1.3
1.2
1.2
1.2
1.1
1.1
1.1
1.1
1
1
1
1.1
1
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1

2.2
2.4
2.4
2.4
2.3
2.2
2.2
2.1
2.1
2
2
2
2
2
2
2
2
2
2
2
2
2
2.1
2.1

1.2
1.3
1.3
1.3
1.2
1.1
1.1
1.1
1
1
0.9
0.9
1
1
0.9
1
1
0.9
0.9
1
1
1
1
1.1

140° SE SE
145° SE SE
150° SE SSE
150° SE SSE
155° SE SSE
155° SE SSE
155° SE SSE
155° SE SSE
160° S SSE
160° S SSE
160° S SSE
160° S SSE
155° SE SSE
330° NW NNW
160° S SSE
155° SE SSE
160° S SSE
160° S SSE
160° S SSE
155° SE SSE
160° S SSE
155° SE SSE
155° SE SSE
155° SE SSE

0.2
0.3
0.3
0.3
0.4
0.4
0.3
0.4
0.5
0.4
0.5
0.5
0.4
0.3
0.5
0.4
0.5
0.5
0.5
0.4
0.5
0.4
0.4
0.3

6
6
6
6
6
6
6
5
5
5
5
5
6
6
5
6
5
5
5
5
5
5
5
5

45
45
45
45
45
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40

8.2
10.2
11.1
10.6
9.2
7.1
4.9
3.0
1.8
1.8
3.1
5.4
8.0
10.1
11.2
10.9
9.7
7.7
5.5
3.4
2.1
1.7
2.6
4.6

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

55
95
95
45
85
95
90
90
95
90
90
90
95
100
95
95
95
95
80
85
90
85
85
85

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0
0
0
0
0
0
0

-
-
-
-
-

0
25
20
20
20
20
0
0
0
0
20
25
30
40
40
50
50
45
35
25
20
20
20
20

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

1019
1020
1020
1021
1021
1021
1021
1021
1021
1021
1020
1020
1020
1020
1021
1021
1021
1022
1022
1022
1021
1021
1021
1021

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

6 43
6 42
6 42
6 43
6 42
6 42
6 42
6 42
5 42
5 41
5 41
5 42
5 42
5 42
6 42
6 42
6 43
7 44
7 44
7 45
8 46
8 46
8 46
8 46

1 34
0 32
-1 31
0 32
-1 31
0 32
0 32
0 31
0 31
0 31
0 0
0 32
0 32
0 32
0 32
1 33
1 34
1 34
4 38
3 38
5 41
6 42
5 40
4 39

23 43 6 12 27
24 44 6 12 27
25 46 6 13 29
24 44 6 12 27
24 44 6 12 27
23 43 6 12 27
22 41 6 11 25
22 40 6 11 25
21 39 6 11 24
21 38 5 11 24
19 35 5 10 22
19 36 5 10 22
21 39 6 11 24
22 41 6 11 25
22 40 6 11 25
21 38 5 11 24
22 41 6 11 25
21 39 6 11 24
20 37 5 10 23
21 38 5 11 24
21 38 5 11 24
21 39 6 11 24
22 40 6 11 25
22 41 6 11 25

1.6
1.6
1.6
1.6
1.6
1.5
1.5
1.4
1.4
1.3
1.3
1.3
1.3
1.3
1.3
1.4
1.4
1.4
1.4
1.4
1.4
1.4
1.4
1.5

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

Expert opinion

An easterly, strong and mostly variable flow prevails over the South of the basin. Over the North, it is westerly, moderate and mostly variable.

For Grève de Saint Marc :
Warning strong breeze offshore.

We are 85% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will end.

Very cloudy. No precipitation. In the evening, very cloudy.
Chance of light rain. NE wind force 5 from the middle of the day. Gusts reaching 31 knots in the evening. Slight sea. Low, short swell from SSE. Excellent visibility.

Tides at Saint-Quay-Portrieux

90

Low tide 02h05 1.75m

High tide 07h47 11.22m

90

Low tide 14h25 1.63m

High tide 20h06 11.08m

www.shom.fr - © SHOM 2025

Consult the tides for March

Sat

15

-

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

Sun

16

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

Mon

17

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

Tue

18

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

Wed

19

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

Thu

20

-

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

Fri

21

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

Sat

22

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

Sun

23

-

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

Mon

24

-

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

Tue

25

-

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

Wed

26

-

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

Thu

27

-

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

Fri

28

-

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

Sat

29

-

- 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