Surf Forecasts:
Fishermans (Rhiw) surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 1AM (local time) - 8ft (2.4m), 7s period, SW swell with 582 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 2.4m 7s and forecast to arrive on Saturday (Sep 19) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 16) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Sat 19th Sep) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s happening in the water.
To be honest, it’s a tough outlook for Fishermans (Rhiw) . The water is running about 63°F, which is a touch warmer than usual for this time of year, but that’s about the only good news.
We start rough. Saturday the 12th is a mess – a strong cross-onshore wind (25 mph) is tearing into a 7ft SW swell, and the combined energy is a hefty 363, but it’s short-period (7 seconds) and just poor surf conditions. Don’t bother.
Sunday morning the 13th is the cleanest moment: the wind goes glassy, dead calm, and the swell drops to 2ft from the SW. The energy is tiny at 40. It’s pretty to look at, but there’s no push. If you’ve got a log and patience, it’s a nice morning paddle.
The week stays small and choppy. Thursday morning the 17th is your best chance for a wave: a 4ft W swell with 105 energy, and a clean cross-offshore NW wind at 22 mph. It’s still a short-period windswell (6 seconds), but it’ll be rideable on a bigger board.
Then it gets messy again. The weekend of the 19th-20th sees stronger onshore winds and lumpy swell, with energy hitting 292 and wave heights around 7ft on the 20th, but it’s all cross-onshore and ugly. That’s too big for beginners and too rough for anyone else – looks more like a kite-surfing day.
From Monday the 21st onward, it’s a long, flat gap. Swell drops below 2ft through to the 27th of September, with almost no energy. We get glassy conditions on the 23rd and again on the 27th, but with zero swell, you’re just floating. That’s about a 6-day stretch with nothing worth paddling for.
If you’ve got to get wet, aim for that Thursday morning (17th) for the best mix of size and clean wind, or that glassy Sunday morning (13th) if you just want a peaceful float. But as it stands, the surf is pretty much on holiday.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Mon night. Very mild (max 18°C on Sat night, min 14°C on Tue morning). Winds increasing (calm on Sun morning, strong winds from the SSW by Mon night). | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Very mild (max 17°C on Tue afternoon, min 13°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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 | SW 7 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | SW 6 | WSW 6 | SW 6 | SW 6 | WSW 6 | WSW 10 | WSW 4 | W 6 | W 5 | W 5 | WSW 5 | SW 6 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 363 | 114 | 40 | 20 | 14 | 71 | 65 | 187 | 85 | 37 | 17 | 12 | 10 | 21 | 105 | 51 | 51 | 31 | 145 | 582 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | on | on | on | on | cross-on | cross | cross-off | cross-off | cross-on | cross-on | cross-off | cross | cross | cross-on | on | on |
High Tide | 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 | 1:20PM2.97m | 1:52AM2.71m | |||||||
Low Tide | 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 | 7:33AM1.31m | 8:07PM1.34m | |||||||
 |  | | |  | |  | | | | | | | | | | | | |  | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — |
 | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — | — | 7:30 | — | — | 7:27 | — |
mm | — | 1 | — | — | — | — | — | 11 | — | — | — | — | — | 1 | — | — | — | — | — | 3 |
Temp °C | 17 | 18 | 17 | 17 | 17 | 17 | 18 | 18 | 14 | 17 | 15 | 13 | 15 | 16 | 14 | 16 | 15 | 15 | 16 | 16 |
Feels °C | 12 | 16 | 17 | 18 | 16 | 14 | 14 | 13 | 10 | 12 | 8 | 7 | 11 | 11 | 8 | 11 | 9 | 8 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 6 | SW 6 | SW 6 | — | W 12 | W 12 | — | SW 6 | SW 6 | WSW 6 | WSW 10 | NNW 5 | — | — | — | NW 4 | NW 4 | — |
| kJ | — | — | 40 | 20 | 14 | — | 3 | 3 | — | 37 | 17 | 12 | 10 | 2 | — | — | — | 9 | 1 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 13 | — | — | — | — | — | — | — | WSW 7 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | — | — | SW 3 | SW 5 | SW 5 | SW 6 | WSW 6 | NW 4 | NW 5 | NW 5 | WNW 5 | WSW 4 | W 6 | W 5 | W 5 | WSW 5 | SW 6 | SW 7 |
| kJ | 363 | 114 | — | — | 2 | 71 | 65 | 187 | 85 | 16 | 54 | 83 | 54 | 21 | 105 | 51 | 51 | 31 | 145 | 582 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 346 | 41 | 2 | 129 | 232 | 255 | 255 | 250 | 7 | 498 | 146 | 129 | 137 | 292 | 317 | 321 | 575 | 366 | 453 | 743 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Recent Eyeball Surf Reports for Wales - Lleyn
‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’
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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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