Porthmadog (Gwynedd) weather
Find a forecast
Forecast days
-
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 1° Celsius;
Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 1 degrees Celsius; -
Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 7° Celsius;
Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 7 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: 13° Celsius; Minimum nighttime temperature: 5° Celsius;
Maximum daytime temperature: 13 degrees Celsius; Minimum nighttime temperature: 5 degrees Celsius;
-
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 2° Celsius;
Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 2 degrees Celsius;
-
Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 6° Celsius;
Maximum daytime temperature: 14 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 Porthmadog
Today (11 May 2026)
| Time |
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 |
20%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature |
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
12°
|
11°
|
9°
|
6°
|
5°
|
4°
|
| Feels like temperature (°C) |
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
9°
|
8°
|
5°
|
3°
|
3°
|
| Wind direction and speed |
N
7
|
N
8
|
N
8
|
N
9
|
N
9
|
N
9
|
N
9
|
N
9
|
N
8
|
N
6
|
NNW
5
|
N
4
|
N
4
|
| Wind gust (mph) |
22
|
21
|
22
|
22
|
23
|
22
|
22
|
22
|
19
|
17
|
14
|
12
|
10
|
| Visibility |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
68%
|
62%
|
55%
|
53%
|
49%
|
42%
|
42%
|
42%
|
44%
|
56%
|
71%
|
76%
|
78%
|
| UV | 4 | 6 | 6 | 5 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
Tuesday (12 May 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%
|
10%
|
20%
|
70%
|
80%
|
40%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
20%
|
| Temperature (°C) |
4°
|
3°
|
3°
|
2°
|
3°
|
4°
|
5°
|
7°
|
9°
|
10°
|
11°
|
10°
|
11°
|
13°
|
14°
|
14°
|
14°
|
14°
|
14°
|
13°
|
12°
|
11°
|
10°
|
10°
|
| Feels like temperature (°C) |
2°
|
2°
|
1°
|
1°
|
2°
|
3°
|
4°
|
7°
|
9°
|
9°
|
9°
|
8°
|
9°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
11°
|
11°
|
9°
|
9°
|
8°
|
| Wind direction and speed (mph) |
NNW
4
|
NNW
4
|
N
3
|
N
3
|
NNW
3
|
NNW
3
|
N
3
|
NNW
2
|
SW
2
|
W
7
|
WNW
9
|
WNW
9
|
WNW
11
|
WNW
12
|
NW
12
|
NW
11
|
WNW
11
|
WNW
10
|
WNW
9
|
W
8
|
WSW
7
|
WSW
7
|
W
7
|
W
8
|
| Wind gust (mph) |
9
|
9
|
9
|
11
|
12
|
12
|
10
|
7
|
10
|
23
|
25
|
26
|
27
|
28
|
28
|
27
|
24
|
22
|
22
|
21
|
20
|
21
|
26
|
30
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
VG
|
VG
|
VG
|
VG
|
M
|
M
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
| Humidity |
80%
|
82%
|
84%
|
85%
|
85%
|
84%
|
84%
|
75%
|
75%
|
72%
|
69%
|
82%
|
80%
|
62%
|
54%
|
44%
|
40%
|
40%
|
41%
|
55%
|
67%
|
74%
|
75%
|
69%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 3 | 2 | 5 | 5 | 5 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
Wednesday (13 May 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 |
20%
|
30%
|
60%
|
80%
|
80%
|
80%
|
80%
|
60%
|
60%
|
60%
|
70%
|
60%
|
70%
|
80%
|
70%
|
70%
|
60%
|
60%
|
70%
|
70%
|
70%
|
70%
|
80%
|
70%
|
| Temperature (°C) |
10°
|
10°
|
9°
|
9°
|
9°
|
9°
|
9°
|
8°
|
9°
|
10°
|
10°
|
11°
|
11°
|
12°
|
12°
|
12°
|
12°
|
12°
|
11°
|
11°
|
10°
|
10°
|
9°
|
9°
|
| Feels like temperature (°C) |
8°
|
7°
|
7°
|
7°
|
6°
|
6°
|
6°
|
5°
|
6°
|
7°
|
7°
|
8°
|
8°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
9°
|
8°
|
7°
|
7°
|
6°
|
| Wind direction and speed (mph) |
W
10
|
W
10
|
WSW
11
|
WSW
11
|
WSW
12
|
W
12
|
W
12
|
WNW
13
|
WNW
14
|
WNW
15
|
WNW
15
|
WNW
15
|
WNW
16
|
WNW
15
|
NW
15
|
NW
14
|
NW
14
|
NW
13
|
NW
13
|
NW
12
|
NW
10
|
NW
10
|
NW
10
|
NW
9
|
| Wind gust (mph) |
32
|
34
|
35
|
38
|
39
|
38
|
38
|
37
|
38
|
38
|
39
|
39
|
39
|
39
|
37
|
38
|
36
|
36
|
35
|
34
|
32
|
32
|
31
|
32
|
| Visibility (description) |
VG
|
G
|
G
|
G
|
M
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
G
|
VG
|
G
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
66%
|
72%
|
75%
|
79%
|
80%
|
79%
|
76%
|
76%
|
74%
|
71%
|
70%
|
68%
|
65%
|
65%
|
66%
|
64%
|
65%
|
65%
|
66%
|
68%
|
72%
|
75%
|
76%
|
78%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 5 | 6 | 3 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | - | - |
Thursday (14 May 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 |
70%
|
60%
|
50%
|
50%
|
50%
|
50%
|
60%
|
60%
|
70%
|
70%
|
70%
|
70%
|
70%
|
70%
|
60%
|
50%
|
50%
|
50%
|
40%
|
40%
|
40%
|
50%
|
60%
|
60%
|
| Temperature (°C) |
8°
|
8°
|
8°
|
8°
|
8°
|
7°
|
7°
|
8°
|
9°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
12°
|
12°
|
11°
|
11°
|
11°
|
10°
|
9°
|
9°
|
8°
|
| Feels like temperature (°C) |
6°
|
6°
|
6°
|
6°
|
5°
|
5°
|
5°
|
6°
|
7°
|
8°
|
8°
|
9°
|
9°
|
9°
|
9°
|
10°
|
10°
|
9°
|
9°
|
9°
|
9°
|
8°
|
7°
|
6°
|
| Wind direction and speed (mph) |
NW
8
|
NW
8
|
NW
8
|
NW
8
|
NW
8
|
NW
8
|
NW
7
|
NW
8
|
NW
8
|
NW
9
|
NW
9
|
NW
9
|
NW
10
|
NW
10
|
NW
10
|
NW
9
|
NW
9
|
NW
9
|
NW
9
|
NNW
8
|
NNW
7
|
NNW
7
|
NNW
7
|
NNW
6
|
| Wind gust (mph) |
31
|
30
|
29
|
28
|
28
|
27
|
26
|
26
|
27
|
27
|
27
|
28
|
28
|
27
|
29
|
29
|
27
|
26
|
26
|
26
|
25
|
25
|
26
|
24
|
| Visibility (description) |
M
|
M
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
M
|
VG
|
VG
|
G
|
G
|
M
|
| Humidity |
80%
|
82%
|
82%
|
82%
|
82%
|
83%
|
83%
|
81%
|
76%
|
74%
|
73%
|
71%
|
68%
|
67%
|
67%
|
64%
|
62%
|
63%
|
64%
|
66%
|
69%
|
78%
|
81%
|
83%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | - | - |
Friday (15 May 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 |
60%
|
50%
|
50%
|
50%
|
40%
|
40%
|
30%
|
30%
|
30%
|
30%
|
20%
|
20%
|
20%
|
20%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
20%
|
| Temperature (°C) |
8°
|
8°
|
8°
|
7°
|
7°
|
7°
|
7°
|
8°
|
10°
|
11°
|
11°
|
12°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
12°
|
11°
|
8°
|
7°
|
6°
|
| Feels like temperature (°C) |
7°
|
6°
|
6°
|
6°
|
5°
|
5°
|
5°
|
7°
|
8°
|
9°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
10°
|
7°
|
6°
|
5°
|
| Wind direction and speed (mph) |
NNW
6
|
NNW
6
|
NW
6
|
NW
5
|
NNW
5
|
NNW
5
|
NW
5
|
NW
5
|
NNW
6
|
NNW
7
|
NNW
7
|
NNW
8
|
NNW
9
|
NNW
9
|
NNW
10
|
NNW
10
|
NNW
9
|
NW
9
|
NW
8
|
NW
7
|
NW
5
|
WNW
4
|
NW
4
|
NNW
3
|
| Wind gust (mph) |
24
|
22
|
22
|
20
|
21
|
21
|
20
|
19
|
22
|
22
|
24
|
25
|
25
|
26
|
26
|
26
|
25
|
23
|
21
|
18
|
16
|
14
|
13
|
12
|
| Visibility (description) |
M
|
M
|
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
G
|
| Humidity |
84%
|
85%
|
86%
|
87%
|
87%
|
87%
|
87%
|
82%
|
75%
|
68%
|
63%
|
58%
|
56%
|
54%
|
54%
|
52%
|
52%
|
51%
|
52%
|
55%
|
64%
|
78%
|
85%
|
88%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 3 | 3 | 4 | 5 | 4 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
Saturday (16 May 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 |
30%
|
20%
|
20%
|
30%
|
30%
|
40%
|
30%
|
30%
|
30%
|
| Temperature (°C) |
6°
|
5°
|
5°
|
8°
|
11°
|
13°
|
13°
|
12°
|
9°
|
| Feels like temperature (°C) |
5°
|
4°
|
4°
|
7°
|
10°
|
11°
|
12°
|
11°
|
8°
|
| Wind direction and speed (mph) |
N
3
|
N
3
|
NNE
3
|
ENE
3
|
SW
8
|
SW
9
|
WSW
9
|
SW
8
|
SSW
4
|
| Wind gust (mph) |
11
|
8
|
7
|
10
|
22
|
22
|
20
|
16
|
11
|
| Visibility (description) |
G
|
M
|
M
|
G
|
G
|
G
|
VG
|
G
|
M
|
| Humidity |
90%
|
91%
|
95%
|
88%
|
77%
|
71%
|
69%
|
79%
|
94%
|
| UV | - | - | - | 1 | 3 | 4 | 2 | 1 | - |
Sunday (17 May 2026)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
|
|
|
|
|
|
|
| Chance of precipitation |
40%
|
40%
|
40%
|
40%
|
40%
|
50%
|
50%
|
50%
|
| Temperature (°C) |
8°
|
8°
|
9°
|
11°
|
12°
|
12°
|
11°
|
10°
|
| Feels like temperature (°C) |
7°
|
7°
|
8°
|
10°
|
10°
|
10°
|
9°
|
8°
|
| Wind direction and speed (mph) |
SSW
4
|
S
4
|
SSW
5
|
SSW
9
|
SSW
10
|
SSW
11
|
SSW
11
|
SSW
8
|
| Wind gust (mph) |
11
|
13
|
19
|
22
|
25
|
26
|
22
|
20
|
| Visibility (description) |
M
|
P
|
M
|
G
|
G
|
VG
|
G
|
M
|
| Humidity |
95%
|
96%
|
93%
|
82%
|
77%
|
75%
|
82%
|
91%
|
| UV | - | - | 1 | 3 | 3 | 2 | 1 | - |
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Wales weather forecast
Headline:
Patchy rain clearing to sunny spells later.
Today:
Outbreaks of patchy rain will sink south across Wales on Monday, clearing to sunny spells during the afternoon with a northerly breeze slowly increasing. Feeling rather chilly for the time of year, despite the sunshine. Maximum temperature 15 °C.
Tonight:
Dry overnight with variable amounts of cloud and lengthy clear spells developing with a risk of a rural frost in the east. Turning cloudier from the northwest towards dawn. Minimum temperature 1 °C.
Tuesday:
Cloudy with patchy rain arriving across Wales during the morning. Turning drier and brighter into the afternoon with sunny spells developing. Perhaps the odd isolated shower in the north later. Maximum temperature 15 °C.
Outlook for Wednesday to Friday:
Blustery with sunny spells and heavy showers on both Wednesday and Thursday. More settled on Friday with drier and brighter conditions. Remaining chilly, with a risk of frost.
Updated:
UK long range weather forecast
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