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

Tue

09

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

Wed

10

-

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

Thu

11

-

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

Fri

12

-

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

Sat

13

-

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

Sun

14

-

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

Mon

15

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

Tue

16

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

Wed

17

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

Thu

18

-

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

Fri

19

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

Sat

20

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

Sun

21

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

Mon

22

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

Tue

23

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

BULLETIN

(established in local time)

Reliability 80%

Wind alert - Warning strong breeze offshore.

Tuesday 9 september

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)

25

20

15

10

5

50

40

30

20

10

15

10

5

0

30

25

20

15

10

5

10

5

0

0.5

0

3

0

25

20

15

10

75

70

65

60

55

50

Wed 10

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

190° S S
185° S S
190° S S
190° S S
190° S S
190° S S
185° S S
175° S S
170° S S
165° S SSE
165° S SSE
175° S S
185° S S
195° S SSW
205° SW SSW
215° SW SW
215° SW SW
220° SW SW
215° SW SSW
210° SW SSW
205° SW SSW
210° SW SSW
205° SW SSW
200° S SSW

11 21 6 13 4
12 22 6 14 4
12 23 6 14 4
12 23 6 14 4
12 23 6 14 4
12 23 6 14 4
12 23 6 14 4
12 23 6 14 4
11 21 6 13 4
12 22 6 14 4
12 22 6 14 4
11 21 6 13 4
10 19 5 12 3
9 16 4 10 3
8 15 4 9 3
8 14 4 9 3
8 15 4 9 3
9 16 4 10 3
8 15 4 9 3
8 15 4 9 3
8 15 4 9 3
9 16 4 10 3
9 16 4 10 3
9 17 5 11 3

19 36 10 22 5
20 37 10 23 5
21 39 11 24 6
22 41 11 25 6
22 41 11 25 6
24 44 12 27 6
23 42 12 26 6
22 40 11 25 6
23 42 12 26 6
24 44 12 27 6
23 43 12 27 6
24 44 12 27 6
23 43 12 27 6
22 40 11 25 6
16 29 8 18 5
14 26 7 16 4
15 27 8 17 4
15 27 8 17 4
14 26 7 16 4
14 26 7 16 4
15 28 8 17 4
16 29 8 18 5
16 30 8 19 5
16 29 8 18 5

0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
0.3
0.3
0.2
0.2
0.3
0.3
0.2
0.3
0.3
0.3
0.3
0.3

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

0.1
0.1
0.1
0.1
0.2
0.2
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1

265° W W
265° W W
265° W W
265° W W
220° SW SW
195° S SSW
200° S SSW
195° S SSW
220° SW SW
220° SW SW
220° SW SW
225° SW SW
225° SW SW
225° SW SW
225° SW SW
265° W W
225° SW SW
195° S SSW
200° S SSW
200° S SSW
220° SW SW
195° S SSW
195° S SSW
195° S SSW

0.1
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

9
9
9
9
7
7
7
8
7
7
7
7
7
7
7
9
7
9
10
9
7
10
10
10

110
110
50
50
110
110
110
60
60
110
120
120
120
110
110
110
110
100
120
100
100
110
110
110

4.7
2.6
1.4
1.4
2.9
5.4
8.4
10.8
12.0
11.8
10.3
8.1
5.5
3.1
1.5
1.0
1.9
4.2
7.1
9.8
11.5
11.8
10.7
8.8

19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66

25
80
75
70
85
100
90
95
100
95
90
95
95
85
80
90
65
100
100
85
80
90
100
95

0
0
0
0
0
0
0
0
0
1.2
0.9
0
0
0
0
0
0
0
0
0
0
0
0
0

-
-
-
-
-
-
-
-
-

25
25
20
0
0
0
0
35
45
65
50
40
30
25
20
0
0
0
0
0
20
35
40
40

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

1015
1014
1014
1013
1012
1012
1011
1011
1010
1010
1010
1009
1009
1008
1008
1007
1007
1006
1006
1006
1005
1005
1005
1005

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

18 64
19 65
19 67
19 67
19 66
18 65
18 64
17 63
16 61
16 60
15 60
15 59
15 59
15 59
15 59
15 58
14 58
14 57
14 57
14 57
15 59
16 60
16 61
16 61

21 70
16 60
18 65
18 64
15 59
16 60
14 57
13 55
12 54
11 53
11 52
11 52
12 53
12 53
12 54
12 53
11 52
11 52
11 52
11 52
12 54
14 57
15 59
15 59

14 26 4 7 16
16 29 5 8 18
15 28 4 8 17
17 31 5 9 19
18 33 5 9 21
17 32 5 9 20
19 36 5 10 22
19 35 5 10 22
21 39 6 11 24
21 39 6 11 24
21 39 6 11 24
22 40 6 11 25
22 40 6 11 25
19 36 5 10 22
16 30 5 8 19
15 27 4 8 17
14 26 4 7 16
14 26 4 7 16
15 27 4 8 17
15 28 4 8 17
15 28 4 8 17
16 29 5 8 18
15 28 4 8 17
15 27 4 8 17

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

Forecasts established in local time
Last updated 1min ago | Next update in 3h
Caption

Expert opinion

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

For Grève de l"Isnain :
Warning strong breeze offshore.

We are 80% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will begin.

Good clear periods but cloud building. Chance of light rain. In the evening, very cloudy skies to overcast.
Showers towards the end of the night. S wind force 4 from the middle of the day. Gusts reaching 24 knots in the evening. Smooth sea. Low, short swell from SW. Excellent visibility.

Tides at Saint-Quay-Portrieux

104

Low tide 03h15 1.15m

High tide 09h00 11.7m

106

Low tide 15h33 1.22m

High tide 21h17 12.09m

www.shom.fr - © SHOM 2025

Consult the tides for September

Tue

09

-

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

Wed

10

-

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

Thu

11

-

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

Fri

12

-

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

Sat

13

-

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

Sun

14

-

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

Mon

15

-

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

Tue

16

-

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

Wed

17

-

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

Thu

18

-

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

Fri

19

-

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

Sat

20

-

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

Sun

21

-

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

Mon

22

-

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

Tue

23

-

- 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