Weather Grève de l'Isnain - Detailed bulletin - Free 15-day Marine forecasts

Saint-Quay-Portrieux (22410)Longitude : -2°50’,2836 W Latitude : 48°39’,486 N Altitude : 0m

Mon

21

-

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

Tue

22

-

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

Wed

23

-

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

Thu

24

-

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

Fri

25

-

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

Sat

26

-

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

Sun

27

-

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

Mon

28

-

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

Tue

29

-

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

Wed

30

-

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

Thu

01

-

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

Fri

02

-

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

Sat

03

-

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

Sun

04

-

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

Mon

05

-

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

BULLETIN

(established in local time)

Reliability 85%

No gale warning.

Monday 21 april

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)

20

15

10

5

0

40

30

20

10

0

10

5

0

30

20

10

0

10

5

0

0.5

0

3

0

20

15

10

5

0

70

60

50

40

Tue 22

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

300° NW WNW
300° NW WNW
295° NW WNW
285° W WNW
270° W W
270° W W
265° W W
265° W W
255° W WSW
250° W WSW
245° SW WSW
245° SW WSW
240° SW WSW
235° SW WSW
240° SW WSW
245° SW WSW
250° W WSW
250° W WSW
250° W WSW
255° W WSW
35° NE NE
45° NE NE
75° E ENE
125° SE ESE

10 18 5 11 3
10 18 5 11 3
8 14 4 9 3
6 12 3 7 3
6 12 3 7 3
6 12 3 7 3
6 12 3 7 3
5 10 3 6 2
5 10 3 6 2
6 11 3 7 2
6 11 3 7 2
6 11 3 7 2
6 11 3 7 2
6 11 3 7 2
5 10 3 6 2
5 10 3 6 2
5 10 3 6 2
5 9 3 6 2
4 8 2 5 2
2 3 1 2 1
3 5 1 3 1
2 4 1 2 1
2 3 1 2 1
1 2 1 1 1

18 33 9 21 5
17 32 9 20 5
16 29 8 18 5
13 25 7 16 4
12 22 6 14 4
11 20 6 12 4
11 20 6 12 4
10 19 5 12 3
10 18 5 11 3
9 17 5 11 3
9 17 5 11 3
9 17 5 11 3
10 18 5 11 3
9 17 5 11 3
9 17 5 11 3
10 19 5 12 3
11 20 6 12 4
11 20 6 12 4
11 20 6 12 4
10 19 5 12 3
9 16 4 10 3
6 12 3 7 3
8 15 4 9 3
11 20 6 12 4

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
0.2
0.3
0.2
0.2

0.5
0.5
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5

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

265° W W
260° W W
260° W WSW
255° W WSW
255° W WSW
255° W WSW
250° W WSW
245° SW WSW
255° W WSW
220° SW SW
220° SW SW
220° SW SW
220° SW SW
220° SW SW
265° W W
265° W W
220° SW SW
220° SW SW
220° SW SW
220° SW SW
220° SW SW
195° S SSW
195° S SSW
195° S SSW

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
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2

6
5
5
4
5
5
4
4
6
4
5
7
7
7
9
9
8
8
8
8
8
10
10
10

60
20
20
25
70
120
110
130
150
160
170
170
180
180
180
180
180
180
180
170
170
180
180
180

5.1
5.1
5.5
6.1
6.8
7.4
7.8
7.9
7.6
7.1
6.4
5.7
5.1
4.8
4.8
5.1
5.8
6.5
7.2
7.7
7.9
7.7
7.2
6.5

12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 53
12 54
12 54
12 54
13 55

35
30
30
20
45
50
55
50
45
55
90
70
95
65
30
80
85
75
90
90
90
90
80
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
20
25
35
40
30

>20
>20
>20
15
10
5
5
5
5
5
5
5
10
10
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20

1014
1014
1015
1016
1017
1017
1017
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019
1018
1018

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

13 55
13 55
11 52
10 50
9 49
9 48
8 47
8 47
8 46
7 45
7 45
7 45
7 45
8 46
9 49
11 52
12 54
13 56
14 57
14 57
14 56
14 56
13 55
13 55

11 51
10 51
9 47
8 46
7 44
6 43
6 43
6 43
6 42
5 41
5 41
5 41
5 41
6 42
8 47
12 53
14 58
16 61
17 62
17 63
13 56
16 61
15 59
15 58

13 24 4 7 15
15 27 4 8 17
15 27 4 8 17
13 24 4 7 15
12 23 4 6 14
12 22 4 6 14
11 21 4 6 13
10 18 3 5 11
8 15 3 4 9
8 15 3 4 9
9 16 3 4 10
9 17 3 5 11
10 18 3 5 11
9 16 3 4 10
8 15 3 4 9
8 14 3 4 9
6 11 2 3 7
3 5 1 1 3
3 6 2 2 4
4 8 2 2 5
4 7 2 2 4
4 7 2 2 4
3 6 2 2 4
4 7 2 2 4

0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.6
0.5
0.5
0.5

Forecasts established in local time
Last updated 14min ago | Next update in 3h
Caption

Expert opinion

A southeasterly and mostly variable flow prevails over the North-East of the basin. Over the South and the West, it is westerly, moderate and mostly variable.

For Grève de l"Isnain :
No gale warning.

We are 85% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.

In the evening, cloud and long sunny periods.
No precipitation. WNW wind force 3. Gusts reaching 18 knots in the evening. Smooth sea. Low, short swell from W. Good visibility.

Tides at Saint-Quay-Portrieux

34

High tide 00h03 8.28m

Low tide 06h58 4.64m

32

High tide 12h53 7.85m

Low tide 19h29 5.07m

www.shom.fr - © SHOM 2025

Consult the tides for April

Mon

21

-

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

Tue

22

-

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

Wed

23

-

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

Thu

24

-

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

Fri

25

-

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

Sat

26

-

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

Sun

27

-

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

Mon

28

-

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

Tue

29

-

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

Wed

30

-

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

Thu

01

-

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

Fri

02

-

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

Sat

03

-

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

Sun

04

-

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

Mon

05

-

- 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 l'Isnain

BULLETIN

Wind

Waves

Weather

Temperature

Offshore

Expert opinion

Tides at Saint-Quay-Portrieux