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Surf Forecasts:

Hells Mouth (Porth Neigwl) surf break

Hells Mouth (Porth Neigwl) surfForecast / Wales – Lleyn / UK

information circle12 Day Weather and Surf, issued 11 pm Saturday 14 Feb 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Hells Mouth (Porth Neigwl) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Hells Mouth (Porth Neigwl) sea temperature is
7.5° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Hells Mouth (Porth Neigwl) this week:

The surf forecast for Hells Mouth (Porth Neigwl) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Feb 17) at 9AM. The primary swell is predicted to be 0.8m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Hells Mouth (Porth Neigwl) in the next 12 days are 2.5m 8s and forecast to arrive on Saturday (Feb 21) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 5s period and expected on Wednesday (Feb 18) at 12PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 17th Feb)2.5ft (0.8m) 8s
Best Surf 9AM (Thu 19th Feb)4.5ft (1.3m) 13s
Most Powerful12AM (Sat 21st Feb)8ft (2.5m) 8s

Table - best surf conditions forecast for Hells Mouth (Porth Neigwl) over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 7mm), mostly falling on Sun afternoon. Mild temperatures (max 9°C on Sun afternoon, min 4°C on Sat night). Winds decreasing (near gales from the S on Sat night, calm by Tue morning).

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Tue night. Very mild (max 10°C on Fri morning, min 4°C on Tue night). Winds decreasing (near gales from the ESE on Wed morning, light winds from the N by Thu morning).

Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sat
21
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
1
0
0
0
0
0
3
2
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.2
SSW
1.4
SW
1.4
WSW
2.2
WSW
2.5
W
2.3
W
1.1
SW
0.8
SW
0.4
WSW
0.6
SW
0.4
SW
0.7
SW
0.9
SW
1.3
WSW
1.4
WSW
1.2
WSW
0.8
WSW
1.8
SW
2.5
SW
1.9
WSW
1.8
WSW
Period(s) (?)6856779812810101113129116896
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3402428739562748118686575528100166545582236146239857575207
Wind
(km/h)
60
S
20
SW
40
W
45
W
45
W
40
WNW
40
NNW
15
NNW
10
SE
40
ESE
60
ESE
55
E
35
ENE
10
N
15
N
25
SSW
30
SW
45
SW
50
SSW
45
SW
35
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
off		cross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		onononononon
High Tide
/ height (m)
7:00AM
3.62
7:17PM
3.55
7:34AM
3.97
7:51PM
3.82
8:07AM
4.30
8:25PM
4.07
8:41AM
4.57
8:59PM
4.26
9:16AM
4.74
9:35PM
4.37
9:52AM
4.80
10:12PM
4.38
10:30AM
4.71
Low Tide
/ height (m)
1:43AM
0.97
2:10PM
0.76
2:19AM
0.69
2:46PM
0.47
2:54AM
0.47
3:20PM
0.25
3:27AM
0.32
3:54PM
0.12
4:00AM
0.26
4:28PM
0.09
4:33AM
0.28
5:02PM
0.17
5:05AM
0.39
5:36PM
0.34
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sat
21
Sunrise-7:35--7:33--7:31--7:30--7:28--7:26--7:22-
Sunset--5:29--5:30--5:32--5:35--5:37--5:37--5:39
light rain
cloud
rain showers
light rain
part cloud
thunderstorm
clear
cloud
cloud
light rain
light rain
light rain
light rain
cloud
part cloud
light rain
part cloud
cloud
cloud
light rain
light rain
Rain (mm)
2-31-1---4214--4---11
Temp. °C78977976655554591010101010
Feels °C (?)-231-3-40-312-4-8-8-610142023
  • 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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View detailed surf forecast for Hells Mouth (Porth Neigwl) at:
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Information about the Hells Mouth (Porth Neigwl) Surf forecast

The above surf forecast table for Hells Mouth (Porth Neigwl) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Hells Mouth (Porth Neigwl) can be found by selecting the local surf guide option on the grey menu. Our Hells Mouth (Porth Neigwl) 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 (Hells Mouth (Porth Neigwl)) 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 Hells Mouth (Porth Neigwl) 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 Hells Mouth (Porth Neigwl), camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 32 km (20 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 48 km (30 miles) away, Aberystwyth, Holyhead and Bangor.

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