Weather Les portes de bassin - Detailed bulletin - Free 15-day Marine forecasts

Batz-sur-Mer FRALongitude : -2°30’,291 W Latitude : 47°12’,066 N Altitude : 0m

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

Wed

24

-

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

Thu

25

-

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

Fri

26

-

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

Sat

27

-

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

Sun

28

-

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

Mon

29

-

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

Tue

30

-

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

Wed

01

-

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

Thu

02

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

BULLETIN

(established in local time)

Reliability 95%

No gale warning.

Thursday 18 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

15

10

5

0

30

20

10

0

10

5

0

15

10

5

0

5

0

1.5

1

3

0

25

20

15

75

70

65

60

55

Fri 19

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

235° SW SW
225° SW SW
215° SW SW
210° SW SSW
190° S S
160° S SSE
150° SE SSE
135° SE SE
135° SE SE
140° SE SE
145° SE SE
150° SE SSE
180° S S
230° SW SW
335° NW NNW
15° N NNE
45° NE NE
85° E E
90° E E
90° E E
90° E E
100° E E
100° E E
105° E ESE

6 12 3 7 3
6 11 3 7 2
5 10 3 6 2
5 9 3 6 2
4 8 2 5 2
5 9 3 6 2
8 15 4 9 3
9 17 5 11 3
9 16 4 10 3
8 14 4 9 3
5 9 3 6 2
2 4 1 2 1
1 1 0 1 1
0 0 0 0 0
0 0 0 0 0
2 3 1 2 1
2 4 1 2 1
3 6 2 4 2
6 11 3 7 2
6 12 3 7 3
6 12 3 7 3
6 12 3 7 3
6 12 3 7 3
8 14 4 9 3

9 16 4 10 -
9 16 4 10 3
8 14 4 9 3
8 14 4 9 3
7 13 4 8 3
7 13 4 8 3
10 18 5 11 -
11 21 6 13 4
12 22 6 14 4
11 20 6 12 4
10 18 5 11 3
7 13 4 8 3
5 9 3 6 2
3 6 2 4 2
3 6 2 4 2
4 8 2 5 2
4 8 2 5 2
5 9 3 6 -
7 13 4 8 3
8 15 4 9 -
9 16 4 10 -
9 16 4 10 -
8 15 4 9 -
9 17 5 11 -

1.2
1.2
1.2
1.2
1.2
1.2
1.3
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1

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

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

265° W W
265° W W
265° W W
265° W W
265° W W
265° W W
265° W W
265° W W
260° W W
260° W W
260° W W
260° W W
260° W W
265° W W
265° W W
265° W W
265° W W
265° W W
265° W W
260° W W
260° W W
260° W W
260° W W
260° W W

1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.1
1.1
1.1
1.1
1.1
1.1
1.1
1.1

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

170
170
170
170
170
170
170
180
180
170
180
180
170
170
170
160
160
160
160
160
160
160
160
160

4.5
4.1
3.4
2.6
2.0
1.8
1.9
2.3
3.0
3.7
4.3
4.8
4.9
4.5
3.9
3.0
2.1
1.6
1.4
1.7
2.3
3.1
3.9
4.5

18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
18 65
19 65
19 65
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66
19 66

100
85
85
80
80
85
85
85
75
55
10
10
5
5
5
5
5
5
5
5
10
5
5
10

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
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

1023
1023
1022
1022
1023
1023
1023
1024
1024
1023
1023
1023
1022
1022
1021
1021
1020
1020
1020
1020
1020
1020
1019
1019

0
0
0
0
0
0
0
1
2
4
5
5
4
2
1
0
0
0
0
0
0
0
0
0

18 65
18 65
18 64
18 64
18 64
18 64
18 64
17 63
18 64
18 64
18 64
18 64
18 65
18 65
19 65
19 66
19 67
20 67
20 67
20 67
20 67
19 67
19 67
19 66

16 60
16 60
16 61
16 61
16 61
16 61
16 62
17 62
18 65
20 68
21 70
23 73
23 73
22 72
21 71
20 67
19 65
18 65
17 63
17 63
17 63
17 62
17 62
16 62

Forecasts established in local time
Last updated 21min ago | Next update in 3h
Caption

Expert opinion

For Les portes de bassin :
No gale warning.

The reliability of the situation is assessed at 95%.

Very cloudy in the morning, changeable skies becoming relatively cloud-free in the afternoon. No precipitation. In the evening, skies gradually hazing over.
No precipitation. S force 3 turning SE in the middle of the day then E. Gusts reaching 12 knots in the middle of the day. Slight sea. Low, fairly long swell from W. Excellent visibility temporarily in the middle of the day.

Tides at Le Croisic

54

High tide 03h31 4.51m

Low tide 09h09 1.76m

61

High tide 15h49 4.87m

Low tide 21h49 1.42m

www.shom.fr - © SHOM 2025

Consult the tides for September

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

Wed

24

-

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

Thu

25

-

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

Fri

26

-

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

Sat

27

-

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

Sun

28

-

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

Mon

29

-

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

Tue

30

-

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

Wed

01

-

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

Thu

02

-

- 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 diving spot Les portes de bassin

BULLETIN

Wind

Waves

Weather

Temperature

Expert opinion

Tides at Le Croisic