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Surf Forecasts:

Harlech surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 11 pm Friday 16 Jan 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Harlech surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Harlech sea temperature is
6.8° C
 (Which is 1.8°C colder than average for this time of year)

Best Forecast Surf Conditions for Harlech this week:

The surf forecast for Harlech over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jan 17) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 14s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Harlech in the next 12 days are 1.9m 12s and forecast to arrive on Wednesday (Jan 21) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Wednesday (Jan 21) at 9AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Sat 17th Jan)2ft (0.6m) 8s
Best Surf 3AM (Thu 22nd Jan)5ft (1.5m) 9s
Most Powerful 3PM (Wed 21st Jan)6ft (1.9m) 12s

Table - best surf conditions forecast for Harlech over the next 12 days.

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

Short Range Forecast Moderate rain (total 15mm), heaviest on Sun night. Mild temperatures (max 9°C on Mon morning, min 5°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 28mm), heaviest during Tue night. Very mild (max 10°C on Tue night, min 6°C on Mon night). Winds increasing (light winds from the SSE on Mon night, near gales from the SSE by Wed morning).

Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Fri
23
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
1
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
SW
0.6
SW
0.5
SW
0.5
SW
0.4
SW
0.3
SW
0.2
WSW
0.2
WSW
0.1
W
0.9
SW
0.6
SW
0.9
SW
1.2
SW
1
SW
1.9
SSW
1.7
SW
1.2
WSW
0.8
WSW
0.5
SW
1.1
SW
1.4
WSW
Period(s) (?)88887777196679101210867810
Wave
Graph
(?)Metric surfscale
Energy kJ (?)845834311375477030862532049395571794521142435
Wind
(km/h)
15
ESE
15
E
15
E
15
E
10
E
5
ESE
5
ESE
5
E
10
SE
10
S
15
SE
40
SSE
35
SSE
55
SSE
35
SE
30
ESE
15
ESE
10
ESE
15
ESE
15
ESE
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffoffoffcross-
off		offcross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offoffoffoffoff
High Tide
/ height (m)
7:11AM
3.69
7:29PM
3.61
7:47AM
3.93
8:04PM
3.78
8:21AM
4.15
8:38PM
3.90
8:55AM
4.32
9:12PM
3.99
9:30AM
4.44
9:48PM
4.03
10:06AM
4.47
10:26PM
4.00
10:44AM
4.41
Low Tide
/ height (m)
1:53AM
1.00
2:20PM
0.84
2:30AM
0.80
2:57PM
0.65
3:06AM
0.64
3:34PM
0.50
3:40AM
0.53
4:10PM
0.41
4:14AM
0.50
4:45PM
0.39
4:46AM
0.53
5:20PM
0.43
5:18AM
0.63
5:55PM
0.53
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Fri
23
Sunrise-8:18--8:18--8:17--8:15--8:15--8:14--8:12-
Sunset--4:32--4:35--4:36--4:37--4:39--4:42--4:43
part cloud
clear
clear
part cloud
cloud
light rain
light rain
light rain
light rain
part cloud
part cloud
light rain
heavy rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
Rain (mm)
-----3444--41523121524
Temp. °C78877789889910910999876
Feels °C (?)3543456766101-33266543
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Harlech surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Harlech at:
surf-forecast.com

Information about the Harlech Surf forecast

The above surf forecast table for Harlech provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Harlech can be found by selecting the local surf guide option on the grey menu. Our Harlech 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 (Harlech) 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 Harlech 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.

Harlech is 9 km (6 miles) from Porthmadog. If you plan a holiday in Mid Wales, look for hotels and other accommodation in Porthmadog. Porthmadog has rooms for a wide range of budgets as well as car hire and transport links.

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