Cwmystradllyn (Gwynedd) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius; -
Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 8° Celsius;
Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius; -
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius; -
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 4° Celsius;
Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 4 degrees Celsius; -
Maximum daytime temperature: 12° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 12 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius;
-
Maximum daytime temperature: 13° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 6 degrees Celsius;
-
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 7 degrees Celsius;
7 day forecast for Cwmystradllyn
Today (14 October 2026)
| Time |
22:00
|
23:00
|
|---|---|---|
| Weather symbols |  |
|
| Chance of precipitation |
20%
|
10%
|
| Temperature |
15°
|
15°
|
| Feels like temperature (°C) |
12°
|
12°
|
| Wind direction and speed |
SSW
22
|
SSW
22
|
| Wind gust (mph) |
39
|
38
|
| Visibility |
M
|
M
|
| Humidity |
92%
|
92%
|
| UV | - | - |
Thursday (15 October 2026)
| 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%
|
10%
|
10%
|
10%
|
<5%
|
20%
|
30%
|
40%
|
60%
|
80%
|
≥95%
|
≥95%
|
≥95%
|
90%
|
90%
|
80%
|
60%
|
50%
|
30%
|
20%
|
10%
|
20%
|
| Temperature (°C) |
15°
|
15°
|
15°
|
16°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
14°
|
14°
|
13°
|
12°
|
12°
|
11°
|
11°
|
11°
|
| Feels like temperature (°C) |
12°
|
12°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
12°
|
11°
|
11°
|
10°
|
10°
|
10°
|
10°
|
| Wind direction and speed (mph) |
SSW
22
|
SSW
22
|
SSW
24
|
SSW
24
|
SSW
24
|
SSW
25
|
SSW
24
|
SSW
23
|
SSW
24
|
SSW
24
|
SSW
25
|
SSW
25
|
SSW
24
|
SW
22
|
SW
21
|
WSW
17
|
WNW
13
|
NW
11
|
NNW
9
|
NNW
8
|
NW
7
|
NW
7
|
WNW
6
|
WNW
5
|
| Wind gust (mph) |
39
|
39
|
40
|
40
|
40
|
40
|
39
|
38
|
38
|
38
|
40
|
39
|
38
|
37
|
34
|
30
|
22
|
17
|
15
|
14
|
14
|
14
|
16
|
17
|
| Visibility (description) |
M
|
M
|
M
|
M
|
M
|
M
|
M
|
M
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
P
|
M
|
M
|
G
|
G
|
| Humidity |
92%
|
92%
|
92%
|
92%
|
92%
|
92%
|
91%
|
92%
|
92%
|
93%
|
93%
|
94%
|
97%
|
98%
|
99%
|
98%
|
96%
|
94%
|
92%
|
92%
|
88%
|
86%
|
86%
|
86%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Friday (16 October 2026)
| 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 |
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
10%
|
20%
|
10%
|
10%
|
10%
|
10%
|
20%
|
30%
|
50%
|
50%
|
70%
|
70%
|
60%
|
50%
|
40%
|
| Temperature (°C) |
11°
|
11°
|
10°
|
10°
|
10°
|
9°
|
9°
|
9°
|
9°
|
10°
|
11°
|
12°
|
12°
|
12°
|
12°
|
12°
|
12°
|
11°
|
10°
|
10°
|
9°
|
9°
|
9°
|
8°
|
| Feels like temperature (°C) |
10°
|
9°
|
8°
|
8°
|
8°
|
8°
|
7°
|
7°
|
7°
|
8°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
8°
|
8°
|
7°
|
7°
|
7°
|
6°
|
| Wind direction and speed (mph) |
WNW
6
|
WNW
7
|
WNW
8
|
WNW
8
|
WNW
8
|
WNW
8
|
WNW
8
|
WNW
7
|
WNW
7
|
WNW
8
|
WNW
10
|
WNW
11
|
WNW
13
|
NW
13
|
NW
13
|
NW
11
|
NW
11
|
NW
9
|
NW
9
|
NNW
8
|
NNW
8
|
NNW
9
|
NNW
8
|
NNW
8
|
| Wind gust (mph) |
17
|
18
|
18
|
18
|
18
|
19
|
18
|
18
|
19
|
20
|
22
|
24
|
25
|
24
|
24
|
24
|
23
|
21
|
20
|
20
|
20
|
21
|
20
|
20
|
| Visibility (description) |
VG
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
84%
|
84%
|
84%
|
84%
|
84%
|
84%
|
83%
|
83%
|
83%
|
82%
|
77%
|
75%
|
74%
|
71%
|
70%
|
67%
|
68%
|
72%
|
76%
|
79%
|
81%
|
83%
|
83%
|
84%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Saturday (17 October 2026)
| 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 |
40%
|
30%
|
30%
|
20%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
8°
|
8°
|
7°
|
8°
|
7°
|
7°
|
6°
|
6°
|
6°
|
7°
|
9°
|
10°
|
11°
|
12°
|
12°
|
12°
|
11°
|
10°
|
8°
|
7°
|
6°
|
6°
|
6°
|
5°
|
| Feels like temperature (°C) |
5°
|
5°
|
5°
|
5°
|
5°
|
5°
|
4°
|
4°
|
4°
|
5°
|
7°
|
8°
|
9°
|
10°
|
10°
|
10°
|
10°
|
8°
|
6°
|
5°
|
4°
|
4°
|
4°
|
3°
|
| Wind direction and speed (mph) |
NNW
8
|
NNW
8
|
N
8
|
N
8
|
N
7
|
N
7
|
N
8
|
N
8
|
NNE
7
|
NNE
6
|
NE
7
|
NE
9
|
NE
9
|
NE
9
|
NE
9
|
NE
9
|
NE
8
|
NE
8
|
NNE
6
|
NNE
7
|
NNE
7
|
NE
7
|
NE
7
|
NE
7
|
| Wind gust (mph) |
19
|
19
|
19
|
18
|
19
|
19
|
19
|
18
|
17
|
17
|
19
|
19
|
19
|
19
|
19
|
19
|
18
|
16
|
15
|
14
|
13
|
13
|
13
|
14
|
| Visibility (description) |
G
|
G
|
G
|
VG
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
| Humidity |
83%
|
82%
|
80%
|
79%
|
78%
|
78%
|
78%
|
80%
|
80%
|
79%
|
74%
|
68%
|
64%
|
57%
|
56%
|
56%
|
57%
|
66%
|
75%
|
76%
|
76%
|
75%
|
75%
|
76%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Sunday (18 October 2026)
| 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%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
5°
|
5°
|
5°
|
5°
|
5°
|
5°
|
6°
|
5°
|
6°
|
7°
|
9°
|
10°
|
11°
|
12°
|
12°
|
12°
|
12°
|
11°
|
9°
|
8°
|
7°
|
7°
|
7°
|
6°
|
| Feels like temperature (°C) |
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
3°
|
3°
|
3°
|
4°
|
6°
|
8°
|
9°
|
10°
|
10°
|
10°
|
10°
|
9°
|
7°
|
6°
|
5°
|
5°
|
4°
|
3°
|
| Wind direction and speed (mph) |
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NE
8
|
NNE
9
|
NNE
8
|
NE
8
|
NNE
9
|
NNE
8
|
NE
9
|
NE
10
|
ENE
10
|
ENE
9
|
ENE
9
|
NE
9
|
NE
8
|
NE
9
|
NNE
8
|
NNE
8
|
NNE
8
|
NE
9
|
NE
9
|
NE
9
|
| Wind gust (mph) |
13
|
13
|
13
|
13
|
13
|
13
|
13
|
13
|
13
|
13
|
16
|
18
|
18
|
18
|
18
|
18
|
17
|
16
|
15
|
15
|
15
|
16
|
16
|
16
|
| Visibility (description) |
G
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
G
|
VG
|
G
|
VG
|
G
|
G
|
G
|
M
|
| Humidity |
77%
|
77%
|
78%
|
78%
|
77%
|
78%
|
79%
|
81%
|
82%
|
79%
|
73%
|
68%
|
65%
|
63%
|
60%
|
59%
|
62%
|
67%
|
75%
|
77%
|
77%
|
78%
|
79%
|
80%
|
| UV | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - |
Monday (19 October 2026)
| Time |
00:00
|
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
6°
|
6°
|
6°
|
6°
|
9°
|
13°
|
13°
|
9°
|
8°
|
| Feels like temperature (°C) |
4°
|
3°
|
3°
|
3°
|
8°
|
11°
|
11°
|
8°
|
6°
|
| Wind direction and speed (mph) |
NE
8
|
NE
9
|
NE
9
|
NE
9
|
ENE
7
|
E
9
|
ENE
10
|
ENE
7
|
ENE
6
|
| Wind gust (mph) |
15
|
13
|
12
|
11
|
19
|
21
|
19
|
14
|
14
|
| Visibility (description) |
M
|
M
|
M
|
P
|
M
|
G
|
G
|
G
|
G
|
| Humidity |
83%
|
84%
|
88%
|
90%
|
81%
|
68%
|
68%
|
87%
|
91%
|
| UV | - | - | - | 1 | 1 | 2 | 1 | - | - |
Tuesday (20 October 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
<5%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
7°
|
7°
|
7°
|
10°
|
13°
|
14°
|
10°
|
9°
|
| Feels like temperature (°C) |
5°
|
5°
|
5°
|
9°
|
11°
|
12°
|
8°
|
8°
|
| Wind direction and speed (mph) |
ENE
6
|
ENE
7
|
ENE
7
|
E
7
|
E
9
|
ESE
9
|
E
7
|
E
6
|
| Wind gust (mph) |
13
|
11
|
13
|
19
|
19
|
17
|
11
|
9
|
| Visibility (description) |
M
|
M
|
P
|
G
|
G
|
G
|
G
|
P
|
| Humidity |
92%
|
93%
|
94%
|
86%
|
78%
|
77%
|
91%
|
93%
|
| UV | - | - | 1 | 1 | 2 | 1 | - | - |
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Wales weather forecast
Headline:
Cloud and and rain on Thursday. Then turning chilly.
This Evening and Tonight:
Staying mostly dry this evening and overnight, but spots of rain and drizzle are possible at times. Gales are possible in the far northwest and rather blustery elsewhere. Very mild. Minimum temperature 13 °C.
Thursday:
Largely cloudy and rather windy with rain edging into the northwest through the morning and continuing slowly southeast through the afternoon. Very mild and feeling unseasonably warm in any brightness. Maximum temperature 19 °C.
Outlook for Friday to Sunday:
Rain on Thursday night clearing south, then colder on Friday with sunny spells and possible showers. Settled and largely dry thereafter with some sunshine and cold, locally frosty nights.
Updated: