Grandes Rocques (Beach) (Guernsey) weather
Find a forecast
Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.
- Head to a lifeguarded beach; check the RNLI lifeguarded beach tool
- Follow RNLI Float to Live advice if you find yourself struggling in the water
- Know what to do if you get caught in a rip current (RNLI)
- Check the tide times to avoid getting cut off by the tide coming in
- Call 999 and ask for the coastguard in an emergency
- Learn more about staying safe at the beach
Highest possible:
Lowest possible:
Today
(18 September 2024)
| Time |
00:00
|
01:00
|
02:00
|
03:00
|
04:00
|
05:00
|
06:00
|
07:00
|
08:00
|
09:00
|
10:00
|
11:00
|
12:00
|
13:00
|
14:00
|
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
17°
63°
|
18°
64°
|
18°
64°
|
18°
65°
|
18°
65°
|
18°
65°
|
18°
65°
|
18°
65°
|
18°
64°
|
17°
63°
|
17°
63°
|
17°
62°
|
17°
62°
|
17°
62°
|
| Feels like temperature (°C) |
12°
54°
|
13°
55°
|
13°
55°
|
13°
55°
|
13°
55°
|
13°
56°
|
13°
56°
|
13°
55°
|
13°
55°
|
13°
55°
|
13°
56°
|
13°
56°
|
14°
56°
|
14°
56°
|
14°
56°
|
14°
56°
|
14°
57°
|
14°
58°
|
14°
58°
|
14°
57°
|
14°
56°
|
13°
56°
|
13°
56°
|
13°
56°
|
| Wind direction and speed |
ENE
25
40
22
11
6
|
ENE
23
38
20
10
5
|
ENE
22
35
19
10
5
|
ENE
22
35
19
10
5
|
ENE
21
34
18
9
5
|
ENE
21
33
18
9
5
|
ENE
20
33
17
9
5
|
ENE
21
33
18
9
5
|
ENE
21
34
18
9
5
|
ENE
21
34
18
10
5
|
ENE
22
35
19
10
5
|
ENE
23
36
20
10
5
|
ENE
23
37
20
10
5
|
ENE
24
38
21
11
5
|
NE
24
39
21
11
5
|
ENE
25
40
22
11
6
|
ENE
23
37
20
10
5
|
ENE
21
34
18
9
5
|
ENE
20
32
17
9
5
|
ENE
19
31
17
9
5
|
ENE
19
31
17
9
5
|
ENE
20
32
17
9
5
|
ENE
21
33
18
9
5
|
ENE
21
34
18
9
5
|
| Wind gust (mph) |
35
56
30
15
7
|
34
54
30
15
7
|
32
52
28
15
7
|
32
52
28
15
7
|
32
52
28
15
7
|
32
52
28
14
7
|
32
52
28
14
7
|
33
52
29
15
7
|
33
53
29
15
7
|
33
54
29
15
7
|
34
54
30
15
7
|
34
54
30
15
7
|
35
56
30
16
7
|
36
58
31
16
7
|
36
59
31
16
7
|
35
56
30
16
7
|
32
52
28
14
7
|
30
48
26
13
6
|
28
44
24
12
6
|
28
45
24
13
6
|
29
47
25
13
6
|
30
48
26
13
6
|
30
48
26
13
6
|
30
49
26
14
6
|
| Visibility |
VG
24
|
VG
25
|
VG
26
|
VG
27
|
VG
28
|
VG
28
|
VG
28
|
VG
28
|
VG
28
|
VG
27
|
VG
26
|
VG
25
|
VG
23
|
VG
23
|
VG
22
|
VG
22
|
VG
21
|
VG
20
|
G
19
|
G
18
|
G
17
|
G
16
|
G
15
|
G
15
|
| Humidity |
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
85%
|
| UV |
-
|
-
|
-
|
-
|
-
|
-
|
1
|
1
|
1
|
1
|
2
|
3
|
4
|
4
|
4
|
3
|
2
|
1
|
1
|
1
|
-
|
-
|
-
|
-
|
| Wind direction and speed |
21
35
18
10
5
|
21
33
18
9
5
|
19
31
17
9
5
|
19
30
17
8
5
|
19
30
17
8
5
|
19
30
17
8
5
|
18
29
16
8
4
|
20
32
17
9
5
|
20
32
17
9
5
|
21
33
18
9
5
|
22
36
19
10
5
|
22
36
19
10
5
|
22
36
19
10
5
|
23
37
20
10
5
|
24
38
21
11
5
|
24
38
21
11
5
|
23
37
20
10
5
|
22
35
19
10
5
|
20
33
17
9
5
|
20
31
17
9
5
|
19
31
17
9
5
|
19
31
17
9
5
|
20
32
17
9
5
|
20
31
17
9
5
|
| Height of waves offshore (m) |
1.5
|
1.5
|
1.5
|
1.5
|
1.5
|
1.5
|
1.5
|
1.6
|
1.6
|
1.6
|
1.6
|
1.6
|
1.6
|
1.6
|
1.6
|
1.6
|
1.5
|
1.4
|
1.3
|
1.3
|
1.2
|
1.2
|
1.2
|
1.1
|
| Period of waves offshore (s) |
14
|
13
|
13
|
13
|
13
|
13
|
12
|
12
|
12
|
12
|
12
|
9
|
9
|
12
|
12
|
9
|
11
|
11
|
11
|
11
|
11
|
11
|
11
|
11
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Thursday
(19 September 2024)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
17°
62°
|
17°
62°
|
17°
62°
|
17°
62°
|
18°
64°
|
19°
66°
|
19°
67°
|
18°
64°
|
18°
64°
|
| Feels like temperature (°C) |
13°
56°
|
13°
56°
|
13°
56°
|
13°
55°
|
13°
56°
|
14°
57°
|
15°
59°
|
14°
58°
|
13°
56°
|
| Wind direction and speed (mph) |
ENE
21
33
18
9
5
|
ENE
21
34
18
9
5
|
ENE
22
35
19
10
5
|
ENE
23
36
20
10
5
|
NE
24
38
21
11
5
|
NE
24
39
21
11
5
|
NE
22
35
19
10
5
|
ENE
21
33
18
9
5
|
ENE
23
36
20
10
5
|
| Wind gust (mph) |
32
51
28
14
7
|
32
52
28
14
7
|
33
52
29
15
7
|
34
55
30
15
7
|
35
57
30
16
7
|
35
56
30
16
7
|
30
49
26
14
6
|
31
50
27
14
6
|
32
51
28
14
7
|
| Visibility (description) |
G
14
|
G
13
|
G
13
|
G
13
|
G
14
|
G
14
|
G
14
|
G
14
|
G
15
|
| Humidity |
87%
|
89%
|
91%
|
89%
|
86%
|
85%
|
85%
|
84%
|
84%
|
| UV |
-
|
-
|
-
|
1
|
2
|
5
|
2
|
1
|
-
|
| Wind direction and speed |
20
32
17
9
5
|
20
32
17
9
5
|
20
32
17
9
5
|
22
35
19
10
5
|
23
37
20
10
5
|
23
37
20
10
5
|
22
35
19
10
5
|
21
33
18
9
5
|
22
35
19
10
5
|
| Height of waves offshore (m) |
1.1
|
1.1
|
1.2
|
1.3
|
1.4
|
1.4
|
1.3
|
1.2
|
1.2
|
| Period of waves offshore (s) |
11
|
11
|
11
|
11
|
6
|
6
|
6
|
12
|
12
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
Friday
(20 September 2024)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
<5%
|
<5%
|
20%
|
| Temperature (°C) |
17°
63°
|
17°
62°
|
17°
62°
|
18°
64°
|
19°
66°
|
19°
66°
|
17°
63°
|
17°
62°
|
| Feels like temperature (°C) |
13°
55°
|
13°
55°
|
12°
54°
|
14°
57°
|
15°
60°
|
16°
61°
|
15°
58°
|
15°
58°
|
| Wind direction and speed (mph) |
ENE
22
36
19
10
5
|
NE
24
38
21
11
5
|
NE
23
37
20
10
5
|
NE
20
33
17
9
5
|
NE
19
30
17
8
5
|
NE
17
27
15
8
4
|
NE
16
25
14
7
4
|
ENE
13
20
11
6
4
|
| Wind gust (mph) |
33
53
29
15
7
|
34
54
30
15
7
|
33
53
29
15
7
|
31
49
27
14
6
|
28
45
24
13
6
|
25
40
22
11
6
|
23
36
20
10
5
|
21
33
18
9
5
|
| Visibility (description) |
G
14
|
G
13
|
G
14
|
G
16
|
G
17
|
G
18
|
G
17
|
G
15
|
| Humidity |
87%
|
89%
|
86%
|
85%
|
85%
|
84%
|
85%
|
87%
|
| UV |
-
|
-
|
1
|
2
|
5
|
2
|
1
|
-
|
| Wind direction and speed |
22
35
19
10
5
|
22
36
19
10
5
|
23
37
20
10
5
|
22
35
19
10
5
|
20
32
17
9
5
|
19
30
17
8
5
|
17
27
15
8
4
|
16
25
14
7
4
|
| Height of waves offshore (m) |
1.3
|
1.3
|
1.4
|
1.4
|
1.3
|
1.1
|
0.9
|
0.8
|
| Period of waves offshore (s) |
11
|
11
|
8
|
6
|
6
|
10
|
10
|
10
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Saturday
(21 September 2024)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
30%
|
30%
|
20%
|
20%
|
40%
|
50%
|
50%
|
| Temperature (°C) |
17°
62°
|
16°
62°
|
16°
61°
|
17°
63°
|
19°
65°
|
19°
65°
|
17°
63°
|
17°
62°
|
| Feels like temperature (°C) |
15°
59°
|
15°
59°
|
15°
59°
|
16°
61°
|
17°
63°
|
17°
63°
|
16°
61°
|
16°
60°
|
| Wind direction and speed (mph) |
ENE
11
19
10
5
3
|
ENE
10
16
9
5
3
|
E
10
15
9
4
3
|
E
11
18
10
5
3
|
E
12
19
10
5
3
|
E
10
16
9
4
3
|
ENE
9
15
8
4
3
|
ENE
9
14
8
4
3
|
| Wind gust (mph) |
20
32
17
9
5
|
19
31
17
9
5
|
20
32
17
9
5
|
20
32
17
9
5
|
18
30
16
8
4
|
19
31
17
9
5
|
19
31
17
9
5
|
18
29
16
8
4
|
| Visibility (description) |
G
14
|
G
14
|
G
15
|
G
16
|
G
18
|
G
18
|
G
17
|
G
17
|
| Humidity |
88%
|
91%
|
87%
|
86%
|
84%
|
85%
|
85%
|
86%
|
| UV |
-
|
-
|
1
|
3
|
4
|
2
|
1
|
-
|
| Wind direction and speed |
14
23
12
6
4
|
13
22
11
6
4
|
13
22
11
6
4
|
14
22
12
6
4
|
13
21
11
6
4
|
12
19
10
5
3
|
12
19
10
5
3
|
12
20
10
6
3
|
| Height of waves offshore (m) |
0.7
|
0.6
|
0.6
|
0.5
|
0.5
|
0.5
|
0.4
|
0.5
|
| Period of waves offshore (s) |
10
|
9
|
9
|
9
|
9
|
9
|
11
|
11
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Sunday
(22 September 2024)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
| Chance of precipitation |
50%
|
50%
|
50%
|
50%
|
50%
|
40%
|
50%
|
50%
|
| Temperature (°C) |
16°
61°
|
16°
61°
|
16°
61°
|
17°
62°
|
17°
63°
|
17°
63°
|
17°
62°
|
17°
62°
|
| Feels like temperature (°C) |
15°
59°
|
15°
59°
|
15°
59°
|
15°
59°
|
15°
60°
|
15°
59°
|
15°
59°
|
15°
59°
|
| Wind direction and speed (mph) |
ENE
9
15
8
4
3
|
E
9
15
8
4
3
|
E
10
15
9
4
3
|
E
11
18
10
5
3
|
ENE
12
19
10
5
3
|
NNE
13
21
11
6
4
|
NE
12
20
10
6
3
|
NNE
11
18
10
5
3
|
| Wind gust (mph) |
19
30
17
8
5
|
19
30
17
8
5
|
18
29
16
8
4
|
18
29
16
8
4
|
19
30
17
8
5
|
20
32
17
9
5
|
19
31
17
9
5
|
19
31
17
9
5
|
| Visibility (description) |
G
18
|
G
16
|
G
15
|
G
15
|
G
15
|
G
17
|
G
16
|
G
17
|
| Humidity |
87%
|
90%
|
92%
|
91%
|
91%
|
89%
|
89%
|
89%
|
| UV |
-
|
-
|
1
|
2
|
4
|
1
|
1
|
-
|
| Wind direction and speed |
12
19
10
5
3
|
11
18
10
5
3
|
12
19
10
5
3
|
13
21
11
6
4
|
13
21
11
6
4
|
13
21
11
6
4
|
13
21
11
6
4
|
13
20
11
6
4
|
| Height of waves offshore (m) |
0.5
|
0.4
|
0.4
|
0.5
|
0.5
|
0.6
|
1.0
|
0.9
|
| Period of waves offshore (s) |
10
|
10
|
10
|
10
|
10
|
10
|
5
|
5
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Monday
(23 September 2024)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
| Chance of precipitation |
50%
|
50%
|
50%
|
40%
|
30%
|
20%
|
30%
|
20%
|
| Temperature (°C) |
16°
62°
|
16°
61°
|
16°
61°
|
16°
61°
|
16°
61°
|
16°
61°
|
16°
61°
|
16°
61°
|
| Feels like temperature (°C) |
15°
58°
|
14°
58°
|
14°
57°
|
14°
57°
|
14°
57°
|
14°
58°
|
14°
58°
|
15°
58°
|
| Wind direction and speed (mph) |
NNE
12
19
10
5
3
|
NNE
13
21
11
6
4
|
NNE
14
22
12
6
4
|
NNE
14
23
12
6
4
|
NNE
14
23
12
6
4
|
N
13
21
11
6
4
|
N
13
21
11
6
4
|
N
12
19
10
5
3
|
| Wind gust (mph) |
19
31
17
9
5
|
21
33
18
9
5
|
20
32
17
9
5
|
20
32
17
9
5
|
18
29
16
8
4
|
19
30
17
8
5
|
19
30
17
8
5
|
19
30
17
8
5
|
| Visibility (description) |
G
17
|
G
16
|
G
17
|
G
16
|
G
16
|
G
17
|
G
17
|
G
17
|
| Humidity |
88%
|
89%
|
90%
|
89%
|
87%
|
86%
|
85%
|
86%
|
| UV |
-
|
-
|
1
|
2
|
4
|
2
|
1
|
-
|
| Wind direction and speed |
13
21
11
6
4
|
14
22
12
6
4
|
14
22
12
6
4
|
14
22
12
6
4
|
13
21
11
6
4
|
– | – | – |
| Height of waves offshore (m) |
0.8
|
0.8
|
0.7
|
0.6
|
0.5
|
– | – | – |
| Period of waves offshore (s) |
5
|
5
|
5
|
7
|
9
|
– | – | – |
| Direction of waves offshore |
|
|
|
|
|
–
|
–
|
–
|
Tuesday
(24 September 2024)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |
|
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
30%
|
20%
|
20%
|
10%
|
20%
|
20%
|
| Temperature (°C) |
16°
61°
|
16°
60°
|
15°
60°
|
16°
60°
|
16°
61°
|
16°
60°
|
16°
60°
|
16°
61°
|
| Feels like temperature (°C) |
14°
58°
|
14°
57°
|
13°
56°
|
14°
56°
|
14°
57°
|
14°
57°
|
14°
57°
|
14°
57°
|
| Wind direction and speed (mph) |
N
12
19
10
5
3
|
N
12
19
10
5
3
|
N
13
21
11
6
4
|
N
14
22
12
6
4
|
NW
13
21
11
6
4
|
NW
13
20
11
6
4
|
NW
12
19
10
5
3
|
SSE
12
19
10
5
3
|
| Wind gust (mph) |
19
31
17
9
5
|
18
29
16
8
4
|
19
31
17
9
5
|
20
32
17
9
5
|
18
29
16
8
4
|
17
28
15
8
4
|
17
27
15
8
4
|
19
31
17
9
5
|
| Visibility (description) |
G
17
|
G
17
|
G
16
|
G
17
|
G
18
|
G
18
|
G
19
|
G
19
|
| Humidity |
86%
|
86%
|
85%
|
85%
|
84%
|
84%
|
83%
|
83%
|
| UV |
-
|
-
|
1
|
2
|
4
|
2
|
1
|
-
|
| Wind direction and speed | – | – | – | – | – | – | – | – |
| Height of waves offshore (m) | – | – | – | – | – | – | – | – |
| Period of waves offshore (s) | – | – | – | – | – | – | – | – |
| Direction of waves offshore |
–
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
Tooltip header
Tide times
Wednesday 18 September
Tide times and heights are from ST. PETER PORT tidal station which is 3.4 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Tide times
Wednesday 18 September
Tide times and heights are from ST. PETER PORT tidal station which is 3.4 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.