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Surf Forecasts:

Harlech surfForecast / Wales – Mid / UK

information circle12 Day Weather and Surf, issued 11 am Tuesday 10 Mar 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
8.3° C
 (Which is slightly warmer than usual)

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 (Mar 14) at 9PM. The primary swell is predicted to be 1.4m and 8s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Harlech in the next 12 days are 2.5m 10s and forecast to arrive on Thursday (Mar 12) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sat 14th Mar)4.5ft (1.4m) 8s
Best Surf 9PM (Sat 14th Mar)4.5ft (1.4m) 8s
Most Powerful12PM (Thu 12th Mar)8ft (2.5m) 10s

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

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

Short Range Forecast Heavy rain (total 27mm), heaviest during Thu night. Very mild (max 10°C on Thu morning, min 4°C on Thu night). Mainly near gales.

Days 3-6 Weather Summary Moderate rain (total 13mm), heaviest on Fri afternoon. Mild temperatures (max 9°C on Sun morning, min 4°C on Fri morning). Winds decreasing (strong winds from the WSW on Fri morning, calm by Sat night).

Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SW
1.5
SW
1.7
WSW
1.8
W
1.6
WSW
2
SW
2.5
SW
2.5
WSW
1.6
WSW
2.1
WSW
1.8
WSW
1.7
W
1.4
WSW
1.9
SW
1.3
WSW
1.7
WSW
2.1
WSW
2.5
W
1.8
WSW
1.6
SW
2.1
SW
Period(s) (?)678767101010776678779769
Wave
Graph
(?)Metric surfscale
Energy kJ (?)7220637432918442913651207482468316225118381217305469941355202711
Wind
(km/h)
30
S
35
S
35
W
35
W
30
WSW
45
SSW
55
SSW
50
SW
30
W
40
WSW
30
WSW
30
WNW
20
W
10
W
10
SSW
30
SW
35
W
40
WSW
35
SW
35
SSW
25
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrossononcross-
on		cross-
on		cross-
on		cross-
on		ononononononcrosscross-
on		oncross-
on		cross-
on		cross-
on		cross
High Tide
/ height (m)
11:58AM
3.29
12:15AM
3.14
12:41PM
2.91
1:09AM
2.83
1:57PM
2.61
3:02AM
2.66
4:14PM
2.60
4:54AM
2.86
5:27PM
2.86
5:46AM
3.22
6:08PM
3.19
6:23AM
3.62
6:43PM
3.55
Low Tide
/ height (m)
6:19PM
1.42
6:49AM
1.49
7:15PM
1.68
8:15AM
1.73
9:03PM
1.82
10:24AM
1.74
11:05PM
1.69
11:57AM
1.47
12:14AM
1.38
12:48PM
1.10
12:59AM
1.03
1:28PM
0.72
1:37AM
0.71
Tuesday
10
Wednesday
11
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Sunrise6:43--6:41--6:39--6:37--6:33--6:31--6:28--
Sunset-6:09--6:12--6:14--6:15--6:16--6:19--6:21-
cloud
light rain
rain showers
part cloud
part cloud
rain showers
light rain
light rain
rain showers
rain showers
rain showers
rain showers
light rain
cloud
part cloud
rain showers
part cloud
part cloud
light rain
mod rain
cloud
Rain (mm)
-17--133122361--1--36-
Temp. °C999899101074666679988910
Feels °C (?)32312-1-102-6-2-3131310125
  • 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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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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