Weather Plage des Grandes Vallées - Detailed bulletin - Free 15-day Marine forecasts

Pornic FRALongitude : -2°7’,416 W Latitude : 47°6’,654 N Altitude : 0m

Mon

20

-

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

Tue

21

-

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

Wed

22

-

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

Thu

23

-

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

Fri

24

-

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

Sat

25

-

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

Sun

26

-

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

Mon

27

-

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

Tue

28

-

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

Wed

29

-

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

Thu

30

-

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

Fri

31

-

- 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

BULLETIN

(established in local time)

Reliability 80%

Wind alert - Warning moderate gale offshore.

Monday 20 october

Wind

Average winds

Gusts

10m above ground level:

Direction

Speed

Gusts

Under storms

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)

50

40

30

20

10

80

70

60

50

40

30

20

25

20

15

10

5

50

40

30

20

10

5

0

5

0

3

0

20

15

10

5

65

60

55

50

45

Tue 21

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

235° SW SW
245° SW WSW
240° SW WSW
250° W WSW
250° W WSW
255° W WSW
260° W WSW
265° W W
260° W W
260° W W
265° W W
260° W W
255° W WSW
250° W WSW
255° W WSW
255° W WSW
255° W WSW
255° W WSW
260° W W
260° W W
270° W W
270° W W
265° W W
265° W W

22 41 11 25 6
24 44 12 27 6
25 47 13 29 6
26 48 13 30 6
26 48 13 30 6
26 48 13 30 6
24 45 13 28 6
23 43 12 27 6
23 42 12 26 6
21 39 11 24 6
20 37 10 23 5
18 34 9 21 5
19 36 10 22 5
17 31 9 19 5
16 30 8 19 5
16 29 8 18 5
15 28 8 17 4
15 28 8 17 4
15 27 8 17 4
13 25 7 16 4
15 27 8 17 4
13 24 7 15 4
14 26 7 16 4
15 28 8 17 4

37 69 19 43 8
40 74 21 46 8
40 75 21 47 9
41 76 21 47 9
40 74 21 46 8
40 75 21 47 9
39 72 20 45 8
38 70 19 43 8
36 66 18 41 8
34 63 18 39 8
32 59 16 37 7
29 54 15 34 7
30 56 16 35 7
29 54 15 34 7
27 50 14 31 7
26 48 13 30 6
24 44 12 27 6
24 44 12 27 6
22 41 11 25 6
21 39 11 24 6
22 40 11 25 6
21 38 11 24 5
21 38 11 24 5
23 42 12 26 6

>40 >75 >21 >45 >9
>40 >75 >21 >45 >9
>45 >85 >24 >50 >9
>45 >85 >24 >55 >9
>40 >80 >23 >50 >9
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
>30 >60 >17 >35 >7
>30 >55 >16 >35 >7
>30 >60 >17 >35 >8
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -
- - - - -

1.4
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.4
1.3
1.3
1.2
1.2
1.1
1.1
1
0.9
0.9
0.9
0.9
0.9
0.9
0.9

2.6
2.7
2.7
2.8
2.8
2.8
2.8
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2
1.9
1.8
1.7
1.7
1.7
1.7
1.6
1.6

1.4
1.4
1.5
1.5
1.5
1.5
1.1
1
0.9
0.8
0.8
0.7
0.7
0.8
0.8
0.7
0.6
0.5
0.5
0.5
0.4
0.5
0.5
0.6

185° S S
190° S S
110° E ESE
110° E ESE
110° E ESE
115° SE ESE
190° S S
190° S S
190° S SSW
190° S S
190° S S
185° S S
180° S S
190° S S
190° S S
190° S S
190° S S
190° S S
250° W WSW
245° SW WSW
245° SW WSW
245° SW WSW
195° S SSW
185° S S

0.1
0.1
0.1
0.1
0.1
0.1
1.0
1.0
1.0
1.0
1.0
0.9
0.8
0.8
0.7
0.7
0.7
0.7
0.7
0.8
0.7
0.7
0.6
0.5

6
6
4
5
4
4
6
6
6
6
10
11
12
10
10
10
9
9
8
8
7
7
9
10

45
50
50
60
70
70
70
70
80
80
110
110
110
100
100
100
100
110
110
100
90
90
90
80

1.5
2.3
3.5
4.7
5.5
5.6
5.2
4.5
3.5
2.5
1.7
1.2
1.2
1.9
3.1
4.4
5.4
5.6
5.4
4.7
3.7
2.7
1.9
1.3

16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61
16 61

100
85
95
60
75
75
80
60
60
80
70
75
95
100
100
100
100
100
75
95
100
90
85
95

0.1
0.6
0.5
0
0
0
0
0
0
0
0
0
0
0
0.3
0.1
0
0
0
0
0
0
0
0

-
-
-
-
-
-
-
-
-

95
70
65
45
45
30
20
0
0
0
0
0
20
40
50
50
30
0
0
0
0
25
30
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

999
999
999
999
999
999
999
1000
1000
1000
1000
1001
1001
1000
1000
1000
1000
999
999
999
1000
1000
1001
1002

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

16 61
16 61
16 61
17 62
17 62
16 61
16 61
16 60
16 60
16 60
16 60
16 60
16 60
15 60
15 60
15 60
16 60
16 60
15 60
15 60
15 59
15 59
16 60
16 61

10 50
10 49
11 52
10 50
10 51
10 50
9 49
9 48
9 47
9 48
9 49
10 49
9 49
10 50
10 50
10 50
10 51
10 51
10 51
11 51
10 50
11 51
11 52
12 54

28 51 7 14 32
29 54 7 15 34
30 55 7 15 34
29 54 7 15 34
30 56 7 16 35
29 54 7 15 34
28 52 7 14 32
27 50 7 14 31
26 48 6 13 30
26 48 6 13 30
24 44 6 12 27
23 43 6 12 27
22 40 6 11 25
22 40 6 11 25
19 35 5 10 22
19 36 5 10 22
18 33 5 9 21
17 32 5 9 20
16 30 5 8 19
17 31 5 9 19
16 29 5 8 18
16 29 5 8 18
17 31 5 9 19
17 31 5 9 19

3.2
3.3
3.5
3.6
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.1
3
2.9
2.8
2.8
2.7
2.6
2.5
2.4
2.3
2.2
2.1
2

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

Expert opinion

Low 980 hPa centered to the South-West of Ireland moving at 20 knots to the East to be centered on the South-West of England.

For Plage des Grandes Vallées :
Warning moderate gale offshore.

The reliability of the situation is assessed at 80%.

Skies very cloudy, risk of thundery outbreaks during the afternoon. Showers all day. In the evening, good clear periods but lots of cloud, too.
Chance of light rain. SW force 5 becoming WSW force 6 in the middle of the day then W. Gusts reaching 41 knots in the middle of the day. Slight sea becoming moderate in the middle of the day. Low, short swell from S. Excellent visibility.

Tides at Pornic

82

High tide 04h26 5.48m

Low tide 11h10 1.24m

84

High tide 16h40 5.64m

Low tide 23h33 1.13m

www.shom.fr - © SHOM 2025

Consult the tides for October

Mon

20

-

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

Tue

21

-

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

Wed

22

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

Thu

23

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

Fri

24

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

Sat

25

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

Sun

26

-

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

Mon

27

-

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

Tue

28

-

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

Wed

29

-

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

Thu

30

-

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

Fri

31

-

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

Sat

01

-

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

Sun

02

-

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

Mon

03

-

- 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 Plage des Grandes Vallées

BULLETIN

Wind

Waves

Weather

Temperature

Offshore

Expert opinion

Tides at Pornic