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Trefor Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Trefor surfForecast / Wales – Lleyn / UK
16 Day Weather and Surf, issued 6 pm Sunday 31 May 2026 BSTForecast update in hr min s Forecast update imminent
Trefor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trefor sea temperature is
14.7° C
(Which is 3.1°C warmer than normal for this time of year)Trefor surf forecast from 31 May 2026:
- Best quality surf: Wednesday 3 Jun, 4AM (local time) - 3ft (0.9m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 4 Jun, 4PM (local time) - 5.5ft (1.7m), 12s period, WSW swell with 802 kJ wave energy.
- Next surfable swell (1★+): Wednesday 3 Jun, 4AM (local time) - 3ft (0.9m), 8s period with WSW swell.
Best Forecast Surf Conditions for Trefor this week:
The surf forecast for Trefor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jun 03) at 4AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.3m and 4s. Another secondary swell of 0.1m and 16s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Trefor in the next 16 days are 1.7m 12s and forecast to arrive on Thursday (Jun 04) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Jun 03) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 3rd Jun) | 3ft (0.9m) 8s |
| Best Surf | 4AM (Wed 3rd Jun) | 3ft (0.9m) 8s |
| Most Powerful | 4PM (Thu 4th Jun) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Trefor over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 23mm), heaviest during Mon morning. Very mild (max 15°C on Sun afternoon, min 12°C on Sun night). Winds increasing (calm on Mon night, fresh winds from the S by Wed morning). | Days 5-7 Weather SummaryHeavy rain (total 20mm), heaviest during Wed afternoon. Very mild (max 14°C on Wed afternoon, min 11°C on Thu afternoon). Mainly strong winds. | ||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wednesday 3 | Thursday 4 | Friday 5 | Saturday 6 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
SW 12 | WSW 11 | WSW 11 | WSW 10 | SW 14 | SW 6 | SW 6 | WSW 9 | SSW 6 | SW 7 | SW 7 | SW 7 | WSW 12 | W 5 | W 5 | NW 5 | SW 13 | W 13 | W 13 | SW 8 | SW 9 | |
35 | 25 | 12 | 11 | 8 | 30 | 24 | 101 | 0 | 585 | 558 | 503 | 802 | 167 | 92 | 3 | 7 | 3 | 3 | 227 | 74 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | off | cross-off | off | cross-off | cross-on | cross | cross | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 9:38PM3.51m | 9:58AM3.34m | 10:13PM3.51m | 10:33AM3.28m | 10:49PM3.47m | 11:08AM3.17m | 11:24PM3.40m | 11:44AM3.03m | 00:02AM3.31m | 12:22PM2.89m | 00:41AM3.21m | 1:04PM2.76m | 1:26AM3.11m | ||||||||
Low Tide | 4:20PM0.62m | 4:43AM0.53m | 4:55PM0.65m | 5:19AM0.54m | 5:30PM0.70m | 5:58AM0.60m | 6:07PM0.76m | 6:38AM0.68m | 6:45PM0.83m | 7:20AM0.77m | 7:25PM0.92m | 8:04AM0.85m | 8:09PM1.02m | 8:52AM0.90m | |||||||
 |  |  | |  | | | |  |  | | | | |  | | | | | | | |
 | — | — | 4:58 | — | — | 4:56 | — | — | 4:56 | — | — | 4:56 | — | — | 4:54 | — | — | 4:54 | — | — | 4:54 |
 | — | 9:30 | — | — | 9:31 | — | — | 9:32 | — | — | 9:35 | — | — | 9:36 | — | — | 9:37 | — | — | 9:37 | 9:38 |
— | 3 | 8 | 7 | 2 | — | — | 1 | 2 | 4 | 5 | 2 | 3 | 2 | — | — | 2 | 2 | — | 3 | — | |
Temp °C | 15 | 13 | 14 | 14 | 14 | 14 | 15 | 14 | 14 | 14 | 12 | 13 | 11 | 12 | 12 | 12 | 12 | 13 | 14 | 13 | 14 |
12 | 10 | 11 | 11 | 12 | 12 | 14 | 13 | 8 | 7 | 7 | 6 | 3 | 6 | 6 | 6 | 8 | 7 | 8 | 8 | 9 | |
Swell 1 Height (m) Direction Period (s) | SW 12 | WSW 11 | WSW 11 | WSW 10 | SW 10 | SW 6 | — | WSW 9 | — | — | — | — | — | — | — | NW 5 | SW 13 | W 13 | W 13 | SW 8 | SW 9 |
 kJ | 35 | 25 | 12 | 11 | 4 | 30 | — | 101 | — | — | — | — | — | — | — | 3 | 7 | 3 | 3 | 227 | 74 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 14 | SW 14 | SW 14 | W 13 | W 13 | — | — | — | — | — | — | — | — | — | SW 13 | — | W 11 | — | WNW 3 |
| kJ | — | — | 8 | 8 | 8 | 3 | 3 | — | — | — | — | — | — | — | — | — | 7 | — | 3 | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 5 | SW 6 | SSW 5 | SW 6 | — | SW 6 | WSW 4 | SSW 6 | SW 7 | SW 7 | SW 7 | WSW 12 | W 5 | W 5 | SW 4 | SW 5 | SSW 5 | SSW 6 | — | — |
| kJ | 25 | 58 | 88 | 94 | 72 | — | 24 | 10 | 170 | 585 | 558 | 503 | 802 | 167 | 92 | 36 | 38 | 61 | 156 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 295 | 80 | 201 | 320 | 130 | 20 | 276 | 20 | 318 | 280 | 280 | 285 | 108 | 144 | 285 | 280 | 276 | 402 | 276 | 154 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Trefor 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 Trefor Surf forecast
The above surf forecast table for Trefor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trefor can be found by selecting the local surf guide option on the grey menu. Our Trefor 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 (Trefor) 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 Trefor 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 Trefor, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 21 km (13 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 29 km (18 miles) away, Bangor, Holyhead and Llandudno.
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