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Climate change continues to be evident across UK
The UK’s climate has continued to warm, with 2020 the first year to have temperature, rain and sunshine rankings all in the top 10.
Read morePorthmadog (Gwynedd) weather
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Forecast days
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Today. Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Sunny. Sunrise: 05:34; Sunset: 21:11. UV: High; Pollution: Low; Pollen: Moderate.
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Monday 2 August. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Sunny intervals changing to cloudy by late morning. Sunrise: 05:36; Sunset: 21:09. UV: Moderate; Pollution: Low; Pollen: Moderate.
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Tuesday 3 August. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 13 degrees Celsius. Sunny intervals changing to cloudy in the afternoon. Sunrise: 05:37; Sunset: 21:07. UV: High; Pollution: Low; Pollen: Moderate.
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Wednesday 4 August. Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius. Cloudy changing to light showers by late morning. Sunrise: 05:39; Sunset: 21:06. UV: Moderate; Pollution: Low; Pollen: Moderate.
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Thursday 5 August. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Cloudy changing to heavy showers by late morning. Sunrise: 05:40; Sunset: 21:04. UV: Moderate; Pollution: Low; Pollen: Low.
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Friday 6 August. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Cloudy changing to sunny intervals by late morning. Sunrise: 05:42; Sunset: 21:02. UV: Moderate;
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Saturday 7 August. Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius. Sunny intervals changing to light showers by late morning. Sunrise: 05:44; Sunset: 21:00. UV: Moderate;
Seven day forecast for Porthmadog
Today (1 August 2021)
| Time | Now | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
| Chance of precipitation | <5% | <5% | <5% | <5% | <5% | <5% |
| Temperature in degrees Celsius |
18°
|
18°
|
17°
|
15°
|
14°
|
13°
|
| Feels like temperature in degrees Celsius | 16° | 16° | 15° | 14° | 13° | 12° |
| Wind direction and speed in miles per hour |
N
11
|
N
10
|
N
9
|
NNE
6
|
NNE
6
|
NNE
4
|
| Wind gust in miles per hour | 17 | 15 | 16 | 10 | 12 | 11 |
| Visibility | VG | VG | VG | VG | VG | VG |
| Humidity | 65% | 66% | 71% | 76% | 75% | 77% |
| UV | 2 | 1 | 1 | 1 | - | - |
Monday (2 August 2021)
| 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 symbol |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Chance of precipitation | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | 10% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% | <5% |
| Temperature in degrees Celsius |
13°
|
13°
|
12°
|
12°
|
12°
|
13°
|
12°
|
14°
|
15°
|
16°
|
17°
|
17°
|
17°
|
17°
|
18°
|
18°
|
17°
|
18°
|
17°
|
17°
|
16°
|
14°
|
14°
|
13°
|
| Feels like temperature in degrees Celsius | 12° | 12° | 12° | 12° | 12° | 12° | 12° | 14° | 15° | 16° | 17° | 16° | 17° | 16° | 17° | 16° | 16° | 16° | 16° | 16° | 15° | 14° | 13° | 13° |
| Wind direction and speed in miles per hour |
ENE
3
|
NE
5
|
NE
4
|
NE
4
|
NE
5
|
NE
5
|
NE
5
|
NNE
4
|
NE
4
|
ENE
3
|
SSE
3
|
W
5
|
WNW
6
|
NW
7
|
NW
6
|
NW
7
|
NW
8
|
NW
7
|
NW
7
|
NW
6
|
NW
6
|
NW
6
|
NNE
5
|
NNE
4
|
| Wind gust in miles per hour | 9 | 8 | 6 | 7 | 6 | 7 | 6 | 5 | 6 | 5 | 5 | 7 | 8 | 10 | 9 | 12 | 12 | 11 | 10 | 10 | 10 | 10 | 7 | 6 |
| Visibility | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG | VG |
| Humidity | 82% | 81% | 82% | 82% | 83% | 81% | 82% | 79% | 76% | 73% | 67% | 65% | 65% | 63% | 63% | 62% | 59% | 58% | 59% | 61% | 68% | 75% | 77% | 81% |
| UV | - | - | - | - | - | - | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 5 | 5 | 4 | 4 | 3 | 2 | 1 | 1 | 1 | - | - |
Tuesday (3 August 2021)
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
|
| Chance of precipitation | <5% | <5% | <5% | <5% | <5% | <5% | 10% | 10% | <5% |
| Temperature in degrees Celsius |
13°
|
12°
|
12°
|
13°
|
16°
|
18°
|
18°
|
17°
|
15°
|
| Feels like temperature in degrees Celsius | 12° | 12° | 11° | 12° | 16° | 17° | 17° | 17° | 15° |
| Wind direction and speed in miles per hour |
ENE
4
|
ENE
4
|
ENE
4
|
E
5
|
S
5
|
SW
7
|
WSW
6
|
W
5
|
SSW
4
|
| Wind gust in miles per hour | 6 | 6 | 6 | 7 | 8 | 12 | 11 | 10 | 6 |
| Visibility | VG | VG | VG | VG | VG | VG | VG | VG | VG |
| Humidity | 81% | 82% | 84% | 80% | 69% | 63% | 64% | 70% | 89% |
| UV | - | - | - | 1 | 4 | 6 | 4 | 1 | - |
Wednesday (4 August 2021)
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | 10% | 10% | 40% | 40% | 40% | 10% | 10% |
| Temperature in degrees Celsius |
14°
|
14°
|
15°
|
17°
|
18°
|
18°
|
17°
|
16°
|
| Feels like temperature in degrees Celsius | 14° | 14° | 14° | 16° | 17° | 17° | 16° | 15° |
| Wind direction and speed in miles per hour |
SSE
5
|
SE
4
|
SSE
5
|
S
7
|
WSW
8
|
W
8
|
SW
8
|
SSW
7
|
| Wind gust in miles per hour | 7 | 7 | 9 | 14 | 17 | 17 | 15 | 12 |
| Visibility | G | G | G | VG | VG | VG | VG | VG |
| Humidity | 91% | 91% | 91% | 79% | 74% | 72% | 76% | 89% |
| UV | - | - | 1 | 4 | 5 | 4 | 1 | - |
Thursday (5 August 2021)
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | 10% | 20% | 60% | 50% | 40% | 20% | 10% |
| Temperature in degrees Celsius |
16°
|
16°
|
16°
|
16°
|
17°
|
17°
|
17°
|
15°
|
| Feels like temperature in degrees Celsius | 15° | 14° | 14° | 14° | 15° | 15° | 15° | 14° |
| Wind direction and speed in miles per hour |
S
9
|
S
10
|
S
11
|
S
12
|
SSW
11
|
SW
12
|
WNW
11
|
NW
9
|
| Wind gust in miles per hour | 15 | 16 | 18 | 20 | 20 | 22 | 19 | 15 |
| Visibility | G | G | M | M | M | G | G | G |
| Humidity | 89% | 90% | 90% | 86% | 84% | 82% | 82% | 91% |
| UV | - | - | 1 | 2 | 4 | 3 | 1 | - |
Friday (6 August 2021)
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | 10% | 10% | 10% | 40% | 40% | 40% | 10% |
| Temperature in degrees Celsius |
15°
|
14°
|
15°
|
16°
|
17°
|
17°
|
17°
|
15°
|
| Feels like temperature in degrees Celsius | 14° | 13° | 13° | 14° | 15° | 16° | 15° | 14° |
| Wind direction and speed in miles per hour |
NW
9
|
NW
9
|
WSW
9
|
NW
10
|
WSW
11
|
WSW
11
|
NW
10
|
SW
9
|
| Wind gust in miles per hour | 15 | 15 | 15 | 19 | 21 | 21 | 18 | 14 |
| Visibility | G | G | G | G | G | VG | VG | G |
| Humidity | 92% | 93% | 92% | 85% | 77% | 74% | 79% | 89% |
| UV | - | - | 1 | 3 | 4 | 4 | 1 | - |
Saturday (7 August 2021)
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
| Chance of precipitation | 10% | 20% | 10% | 40% | 40% | 40% | 50% | 10% |
| Temperature in degrees Celsius |
15°
|
15°
|
15°
|
16°
|
17°
|
17°
|
17°
|
15°
|
| Feels like temperature in degrees Celsius | 14° | 13° | 14° | 15° | 15° | 16° | 15° | 14° |
| Wind direction and speed in miles per hour |
SW
8
|
NW
8
|
SW
8
|
SSW
10
|
WSW
10
|
SSW
11
|
WNW
10
|
WSW
9
|
| Wind gust in miles per hour | 14 | 14 | 14 | 17 | 20 | 20 | 18 | 15 |
| Visibility | G | G | G | G | G | G | G | G |
| Humidity | 92% | 93% | 92% | 83% | 77% | 75% | 80% | 89% |
| UV | - | - | 1 | 3 | 5 | 3 | 1 | - |
weather map
Porthmadog
Detailed weather map
Forecast for HH:mm, EEE
Updated HH:mm (ZZZZ) on EEE dd MMM yyyy
Wales weather forecast
Headline:
Scattered showers to start the week. Feeling fresher.
This Evening and Tonight:
Low, patchy cloud in south Wales around the Pembrokeshire coast this evening. Scattered showers fade from during the day, leaving a largely dry night for most. Feeling fresh and cool. Minimum temperature 10 °C.
Monday:
Some showers possible in the north during the morning, with some sunny spells. Turning cloudier for all in the afternoon with a risk of further showers. Feeling cooler than recent. Maximum temperature 19 °C.
Outlook for Tuesday to Thursday:
A chilly start to Tuesday with further showers expected, these becoming heavier on Wednesday. Outbreaks of rain on Thursday, heavy at times.
Updated:
UK long range weather forecast
A mixture of sunny spells and showers, with some drier interludes is the general pattern expected through this period, as the unsettled, changeable conditions continue to dominate. Some of these showery spells may merge to give slightly longer spells of rain, with some thunderstorms likely to develop from these. Torrential downpours are likely in some places. There is a risk of strong winds at times for some, and temperatures are expected to be below average, but perhaps slightly above average in northern areas. Through the remainder of this period, it will likely turn settled, though a few showers cannot be ruled out, especially in southeastern areas. This will bring drier weather, with sunny spells for most through to mid-August, and temperatures trending above average.
Updated:
Whilst there are current signals of a drier and warmer than average period from the middle of August, occasional spells of more unsettled weather, primarily in the northwest, remains possible. Accompanying this is a low risk of short-lived thundery spells, these mainly in southeastern parts. Confidence through this period remains low at present. However, most should see dry and fine weather. Above average temperatures continue to be indicated through the remainder of August, with possibly even very warm conditions at times in southern areas.
Updated:
