Surf Forecasts:
Fishermans (Rhiw) surf forecast from 11 Sep 2026:
- Most powerful swell: Saturday 12 Sep, 4PM (local time) - 7ft (2.1m), 7s period, SW swell with 385 kJ wave energy.
Best Forecast Surf Conditions for Fishermans (Rhiw) this week:
The most powerful waves expected at Fishermans (Rhiw) in the next 16 days are 2.1m 7s and forecast to arrive on Saturday (Sep 12) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 12th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Right then, let’s have a proper look at what’s on offer for the next couple of weeks. To be straight with you, it’s a tough start. Fishermans (Rhiw) is going to be a write-off for a good stretch, so don’t be in any hurry. We’ve got a long gap of quiet, onshore slop ahead before things finally turn around.
The forecast kicks off with the best day by far landing on Friday, September 25th. That’s your standout. Through the first week and into the start of the second, it’s mostly poor surf conditions with onshore winds and very weak energy. Saturday the 12th pumps up a bit with a 6ft swell from the SW, but that’s coming with a strong onshore breeze and a combined energy of (293) – so it’s just messy, lumpy, and not worth the paddle. The whole stretch from Friday the 11th right through to Tuesday the 22nd is effectively a surfing dead zone. Scores are bottomed out. Then we get a bit of a tease around the 23rd and 24th with some bigger swell (7ft to 7ft) but again the wind is on or cross-on, so it’s not doing us any favours.
Then, finally, on Friday, September 25th, it all comes together. A proper 10ft groundswell from the SW, period around 9 seconds, with a NNE offshore wind. That’s glassy, clean, and packing some serious grunt – the combined energy reading is (1448). This is excellent surf, but look, that size is for experienced surfers only – over 8ft, it’s expert territory. It’s a reef break too, which is a bonus with that longer period. Into Saturday morning the 26th, it holds at 8ft from the SW with a NNE offshore wind and energy still at (844). That’s a good session for anyone who knows what they’re doing, with clean, offshore lines.
The water temperature is about average for the time of year here. No big anomaly to report. Also, keep in mind crowds are possible here sometimes, but on a day that size, the lineup usually thins out a bit.
So, if you’re waiting, wait for the 25th. That’s the one. The rest of the window is a right-off until then. The good news is this break is fairly consistent, so when the window opens, it should deliver.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Sat morning. Very mild (max 18°C on Thu night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Fri night, calm by Sat night). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Tue morning. Very mild (max 18°C on Mon morning, min 14°C on Tue night). Mainly strong winds. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 7 | WSW 8 | SW 4 | SW 6 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 | SW 5 | SW 6 | SW 5 | SW 6 | SW 6 | SW 6 | SW 7 | SW 6 | WNW 4 | WSW 4 | WSW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 47 | 44 | 16 | 293 | 385 | 158 | 44 | 20 | 19 | 74 | 107 | 56 | 54 | 24 | 20 | 15 | 9 | 18 | 25 | 33 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-off | cross-on | cross | cross-off | cross-off | cross-on | cross-on | cross-on | cross-off |
High Tide | 9:01AM3.98m | 9:16PM4.46m | 9:39AM4.09m | 9:55PM4.48m | 10:15AM4.11m | 10:32PM4.37m | 10:51AM4.02m | 11:09PM4.13m | 11:26AM3.85m | 11:45PM3.81m | 12:01PM3.59m | 00:22AM3.44m | 12:37PM3.29m | 1:02AM3.07m | |||||||
Low Tide | 3:53PM0.09m | 4:21AM-0.15m | 4:29PM0.06m | 4:55AM-0.05m | 5:03PM0.13m | 5:27AM0.15m | 5:36PM0.29m | 5:57AM0.42m | 6:07PM0.51m | 6:26AM0.72m | 6:39PM0.77m | 6:56AM1.02m | 7:16PM1.06m | ||||||||
 |  |  |  | |  | |  | | | | |  | | | | | | | | | |
 | 6:43 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — |
 | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — | — | 7:30 | — |
mm | — | — | 1 | 5 | 2 | — | — | — | 1 | — | — | 1 | 2 | 1 | — | — | — | — | — | — | 1 |
Temp °C | 14 | 14 | 16 | 16 | 17 | 17 | 17 | 16 | 17 | 18 | 18 | 18 | 17 | 16 | 15 | 14 | 15 | 15 | 16 | 17 | 16 |
Feels °C | 12 | 13 | 9 | 9 | 12 | 14 | 17 | 15 | 15 | 15 | 15 | 16 | 13 | 13 | 8 | 6 | 8 | 9 | 9 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 7 | WSW 8 | NW 4 | — | — | SW 7 | SW 7 | SW 6 | WSW 8 | — | W 12 | W 12 | SW 6 | SW 6 | SW 6 | SW 7 | SW 6 | NNW 4 | — | WSW 5 | SW 6 |
| kJ | 47 | 44 | 1 | — | — | 158 | 44 | 20 | 7 | — | 3 | 3 | 54 | 24 | 20 | 11 | 9 | 12 | — | 33 | 25 |
Swell 2 Height (m) Direction Period (s) | — | — | NW 4 | — | — | — | — | NW 4 | — | — | — | W 9 | — | W 11 | — | WSW 9 | WSW 9 | — | — | — | — |
| kJ | — | — | 1 | — | — | — | — | 2 | — | — | — | 1 | — | 2 | — | 15 | 8 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | SW 4 | SW 6 | SW 7 | — | NW 3 | — | SW 6 | SW 5 | SW 6 | SW 5 | NW 3 | NW 4 | NW 6 | NW 6 | NW 5 | WNW 4 | WSW 4 | — | NNW 3 |
| kJ | 10 | 6 | 16 | 293 | 385 | — | 2 | — | 19 | 74 | 107 | 56 | 3 | 29 | 136 | 138 | 52 | 18 | 25 | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 129 | 7 | 188 | 255 | 285 | 139 | 7 | 137 | 240 | 240 | 240 | 136 | 631 | 565 | 296 | 918 | 498 | 281 | 297 | 319 | 297 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Fishermans (Rhiw) Surf forecast
The above surf forecast table for Fishermans (Rhiw) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Fishermans (Rhiw) can be found by selecting the local surf guide option on the grey menu. Our Fishermans (Rhiw) 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 (Fishermans (Rhiw)) 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 Fishermans (Rhiw) 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 Fishermans (Rhiw), camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 34 km (21 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, Holyhead, Aberystwyth and Bangor.
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