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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 5 am Wednesday 07 Jan 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
9.2° 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 Thursday (Jan 08) at 12PM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.6m and 5s. 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 3.0m 9s and forecast to arrive on Monday (Jan 12) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 6s period and expected on Sunday (Jan 11) at 9PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)12PM (Thu 8th Jan)2.5ft (0.7m) 7s
Best Surf12PM (Thu 8th Jan)2.5ft (0.7m) 7s
Most Powerful 3AM (Mon 12th Jan)10ft (3.0m) 9s

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 Heavy rain (total 22mm), heaviest during Thu afternoon. Mild temperatures (max 8°C on Wed night, min 4°C on Wed afternoon). Winds increasing (light winds from the S on Wed night, near gales from the NNW by Thu night).

Days 3-6 Weather Summary Heavy rain (total 22mm), heaviest during Sun night. Mild temperatures (max 9°C on Sun night, min 2°C on Sat night). Winds increasing (light winds from the ENE on Sat night, gales from the SE by Sun night).

Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.3
NW
1.3
WNW
0.8
W
0.8
WSW
0.6
WSW
0.6
SW
1.8
NW
1
WSW
0.9
WSW
0.8
WSW
0.8
WSW
0.6
WSW
1
SE
1.6
SE
3
SE
1.6
SW
1.4
SW
1.1
SW
0.9
SW
0.8
SW
0.7
SW
Period(s) (?)766771161112118945791011111111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)53713741593090240247247149885531132760466392303176142126
Wind
(km/h)
45
NW
25
WNW
30
W
15
WNW
20
ENE
55
NNW
45
NW
45
NW
40
NW
30
NW
25
NNW
15
ESE
35
SE
55
SE
70
SSE
35
SSE
35
SSE
45
SE
35
SSE
30
SSE
30
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
on		cross-
on		cross-
off		cross-
off		crosscrosscrosscrosscross-
off		cross-
off		crosscrosscross-
on		crosscrosscrosscrosscross-
on		cross
High Tide
/ height (m)
10:39AM
4.54
11:03PM
3.85
11:23AM
4.28
11:49PM
3.59
12:09PM
3.95
12:37AM
3.33
12:59PM
3.59
1:31AM
3.10
1:57PM
3.26
2:38AM
2.95
3:08PM
3.04
3:53AM
2.92
4:23PM
2.98
Low Tide
/ height (m)
6:03PM
0.30
6:06AM
0.66
6:44PM
0.55
6:44AM
0.89
7:25PM
0.83
7:24AM
1.13
8:07PM
1.10
8:09AM
1.34
8:54PM
1.31
9:08AM
1.50
9:56PM
1.46
10:32AM
1.56
11:19PM
1.47
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Sunrise8:27--8:27--8:26--8:26--8:26--8:25--8:25--
Sunset-4:20--4:21--4:22--4:23--4:24--4:27--4:28-
part cloud
cloud
light rain
cloud
mod rain
mod rain
light rain
light rain
rain showers
light rain
rain showers
clear
part cloud
cloud
mod rain
rain showers
cloud
rain showers
cloud
rain showers
rain showers
Rain (mm)
--1-9622241---92-6-12
Temp. °C6687476777752599999109
Feels °C (?)-5-103-2-4-5-4-4-101-7-91220143
  • 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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Latest Updates

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Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean

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Discover more articles and updates in the Greenroom.

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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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