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Surf Forecasts:
Porth Colmon surfForecast / Wales – Lleyn / UK
12 Day Weather and Surf, issued 5 pm Tuesday 03 Mar 2026 GMTForecast update in hr min s Forecast update imminent
Porth Colmon surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Colmon sea temperature is
8.1° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Porth Colmon this week:
The surf forecast for Porth Colmon over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Mar 09) at 12AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 11s. Another secondary swell of 0.3m and 12s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Colmon in the next 12 days are 1.7m 5s and forecast to arrive on Thursday (Mar 05) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Thursday (Mar 05) at 9PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 9th Mar) | 2.5ft (0.7m) 8s |
| Best Surf | 12AM (Mon 9th Mar) | 2.5ft (0.7m) 8s |
| Most Powerful | 6PM (Thu 5th Mar) | 5.5ft (1.7m) 5s |
Table - best surf conditions forecast for Porth Colmon over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 10mm), heaviest on Thu afternoon. Very mild (max 13°C on Wed afternoon, min 5°C on Thu afternoon). Winds increasing (light winds from the ENE on Tue afternoon, strong winds from the NNW by Thu afternoon). | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun night. Very mild (max 11°C on Sun afternoon, min 5°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||
Tue 03 | Wednesday 04 | Thursday 05 | Friday 06 | Saturday 07 | Sunday 08 | Monday 09 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 9 | 8 | 8 | 8 | 14 | 6 | 6 | 10 | 6 | 6 | 16 | 19 | 17 | 14 | 8 | 8 | 8 | 8 | 10 | 9 | 9 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 62 | 33 | 14 | 6 | 4 | 35 | 31 | 9 | 165 | 69 | 5 | 36 | 29 | 19 | 32 | 46 | 57 | 79 | 157 | 83 | 76 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | cross- off | off | off | on | cross- on | cross- on | cross- on | glass | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- on | on | ||
High Tide / height (m) | 8:26PM 3.92 | 8:41AM 4.40 | 9:02PM 4.01 | 9:18AM 4.41 | 9:37PM 4.01 | 9:53AM 4.29 | 10:11PM 3.92 | 10:28AM 4.07 | 10:44PM 3.75 | 11:01AM 3.76 | 11:17PM 3.52 | 11:36AM 3.42 | 11:51PM 3.24 | ||||||||||
Low Tide / height (m) | 3:09PM -0.07 | 3:17AM 0.13 | 3:44PM -0.08 | 3:50AM 0.12 | 4:16PM 0.02 | 4:21AM 0.20 | 4:45PM 0.21 | 4:50AM 0.35 | 5:12PM 0.45 | 5:19AM 0.56 | 5:38PM 0.73 | 5:48AM 0.80 | 6:06PM 1.02 | 6:23AM 1.08 | |||||||||
Tue 03 | Wednesday 04 | Thursday 05 | Friday 06 | Saturday 07 | Sunday 08 | Monday 09 | |||||||||||||||||
| Sunrise | - | - | 7:00 | - | - | 6:56 | - | - | 6:54 | - | - | 6:52 | - | - | 6:50 | - | - | 6:48 | - | - | 6:46 | ||
| Sunset | 5:59 | - | - | 6:00 | - | - | 6:02 | - | - | 6:05 | - | - | 6:07 | - | - | 6:08 | - | - | 6:09 | - | - | ||
 |  |  |  |  | |  |  | | |  | | | | | |  | | |  | | |||
Rain (mm) | - | - | - | - | - | - | 4 | 6 | - | - | - | - | - | - | - | - | 2 | - | - | 2 | - | ||
| Temp. °C | 9 | 11 | 11 | 13 | 11 | 12 | 7 | 7 | 6 | 6 | 5 | 6 | 8 | 8 | 9 | 11 | 11 | 10 | 11 | 10 | 7 | ||
| Feels °C (?) | 5 | 6 | 6 | 8 | 5 | 8 | 0 | -2 | -1 | 0 | 2 | 0 | 3 | 2 | 4 | 8 | 8 | 6 | 7 | 8 | 0 | ||
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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 Porth Colmon 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.
Information about the Porth Colmon Surf forecast
The above surf forecast table for Porth Colmon provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Porth Colmon can be found by selecting the local surf guide option on the grey menu. Our Porth Colmon 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 Colmon) 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 Colmon 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 Colmon, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 37 km (23 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 42 km (26 miles) away, Holyhead, Bangor and Aberystwyth.
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