Porth Nefyn surfForecast / Wales – Lleyn / UK

information circle16 Day Weather and Surf, issued 6 am Friday 24 Apr 2026 BST
Forecast update in hr  min  s Forecast update imminent
Porth Nefyn surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Nefyn sea temperature is
10.6° C
(Which is 1.4°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Porth Nefyn this week:

The most powerful waves expected at Porth Nefyn in the next 16 days are 0.6m 11s and forecast to arrive on Friday (Apr 24) at 4PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Thursday (Apr 30) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4PM (Fri 24th Apr)2ft (0.6m) 11s

Table - best surf conditions forecast for Porth Nefyn over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 15°C on Fri afternoon, min 12°C on Sun morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 17°C on Wed afternoon, min 8°C on Tue night). Wind will be generally light.

Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
Thursday
30
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.6
SW
11
0.6
SW
11
0.6
SW
11
0.6
SW
11
0.6
WSW
10
0.5
SW
10
0.4
SW
9
0.4
SW
9
0.4
SW
8
0.3
SW
8
0.3
SW
8
0.2
WSW
7
0.2
WSW
8
0.1
W
15
0.1
W
13
0.1
W
13
0.1
W
13
0.1
W
12
0.1
W
11
0.1
W
11
0.1
W
10
Wave Graph
Metric surfscale
Energy kJ
104
96
94
90
69
45
28
27
17
10
9
5
6
4
4
3
3
3
2
2
2
Wind (km/h)
5
SE
5
NNW
10
ESE
5
SSW
10
WNW
5
E
5
SE
10
SW
5
S
5
NNW
25
NNW
20
NE
15
ENE
10
ENE
10
ENE
10
ENE
20
ENE
15
NE
25
E
25
SE
10
SE
cross-off
glassy
cross-off
cross-off
cross-on
glassy
cross-off
cross-off
glassy
on
on
cross-on
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross-off
High Tide
3:13PM2.66m
3:45AM2.98m
4:57PM2.61m
5:17AM3.03m
6:15PM2.76m
6:23AM3.19m
7:05PM2.96m
7:12AM3.36m
7:44PM3.18m
7:53AM3.51m
8:19PM3.37m
8:31AM3.61m
8:52PM3.53m
Low Tide
10:25PM1.17m
11:20AM0.80m
11:45PM1.12m
12:34PM0.66m
00:54AM0.94m
1:33PM0.48m
1:49AM0.73m
2:20PM0.34m
2:35AM0.55m
3:00PM0.26m
3:15AM0.43m
3:36PM0.25m
3:51AM0.36m
clear
clear
part cloud
clear
clear
cloud
cloud
cloud
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
clear
part cloud
light rain
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
5:58
5:56
5:54
5:52
5:50
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:31
8:34
8:36
8:37
8:38
8:40
8:43
2
6
Temp °C
14
15
15
13
14
14
14
13
13
13
13
13
12
14
13
14
17
13
13
15
13
12
12
12
11
12
13
11
10
11
9
8
9
9
10
9
11
12
10
8
11
11
Swell 1
Height (m)
Direction
Period (s)
0.6
SW
11
0.6
SW
11
0.6
SW
11
0.6
SW
11
0.6
WSW
10
0.5
SW
10
0.4
SW
9
0.4
SW
9
0.4
SW
8
0.3
SW
8
0.3
SW
8
0.3
NNW
4
0.2
NNW
4
0.1
SW
7
0.1
SW
7
0.1
SW
7
0.1
SW
6
0.1
W
12
0.1
W
11
0.1
W
11
0.2
S
3
Energy kJ
104
96
94
90
69
45
28
27
17
10
9
3
2
2
2
2
2
3
2
2
1
Swell 2
Height (m)
Direction
Period (s)
0.2
WSW
7
0.2
WSW
8
0.1
W
15
0.1
W
13
0.1
W
13
0.1
W
13
0.1
W
7
0.1
W
11
Energy kJ
5
6
4
4
3
3
1
2
Swell 3
Height (m)
Direction
Period (s)
0.1
W
9
0.1
W
15
0.1
W
14
0.1
SW
7
0.1
SW
8
0.1
W
10
Energy kJ
2
4
4
2
2
2
Wind waves
Height (m)
Direction
Period (s)
0.3
ESE
3
0.4
NNW
3
0.3
N
4
0.2
NNE
2
0.2
NNE
2
0.4
NNE
3
0.4
ENE
3
0.5
E
3
0.3
SE
4
Energy kJ
1
3
2
1
1
3
3
5
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
Distance (km)
14
13
14
27
13
13
121
121
121
128
308
149
128
128
128
269
128
128
128
213
245
Best forecast wave conditions in Lleyn Peninsula
Rating
(10 max)
1
1
1
1
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
1
2
2
2
2
2
2
2
2
1
2
1
1
1
2
2
2
2
1
1
1
Header Global
Rating
(10 max)
5
5
5
4
5
4
5
5
8
6
6
5
5
7
9
5
5
9
5
5
6
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Porth Nefyn Surf forecast

The above surf forecast table for Porth Nefyn provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Porth Nefyn can be found by selecting the local surf guide option on the grey menu. Our Porth Nefyn surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Porth Nefyn) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Porth Nefyn may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in Lleyn Peninsula? If you are looking for accommodation near Porth Nefyn, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 27 km (17 miles) away. Other places in and around Lleyn Peninsula where you can find information about places to rent, and car hire include Anglesey which is 35 km (22 miles) away, Holyhead, Bangor and Llandudno.

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