Surf Forecasts:
Fishermans (Rhiw) surf forecast from 6 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 1AM (local time) - 7.5ft (2.3m), 7s period, WSW swell with 508 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 2.3m 7s and forecast to arrive on Tuesday (Sep 08) 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 1.6m 6s period and expected on Wednesday (Sep 09) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Tue 8th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Right, let’s take a look at what’s coming up for this stretch over the next couple of weeks. To be honest, the ocean’s playing hard to get for a while.
The first full week is pretty much a bust. From now through around September 13th, there’s hardly anything worth suiting up for. Winds are mostly onshore or cross-on, often strong, and the swell is small and weak. The combined energy barely cracks three digits a few times, peaking at 394 on Monday the 7th afternoon, but that’s a messy onshore wind swell – 4ft from the SSW with a 13-second period, but the wind’s straight on. Not worth it. The few cleaner windows, like Friday the 11th with glassy conditions and light NNW airs, only have 2ft to 2ft of weak energy (30-44). Too small to bother with.
Finally, there’s a glimmer on Monday the 14th of September. Fishermans (Rhiw) picks up a modest 5ft to 5ft of SW groundswell with a 6-second period. The real appeal is the wind: Monday afternoon is glassy, with light SW airs. The combined energy hits 177 – moderate, not huge – but clean, glassy conditions make it the standout of the whole outlook. The water’s running a touch warmer than average at about 63°F, roughly 3°F above the norm for early September, so a little extra warmth in the lineup. It’s not big, not powerful, but if you want the cleanest wave of the fortnight, this is it. Keep in mind, crowds are possible here sometimes.
After that, it’s back to the doldrums. The second week is a mix of poor wind and very small surf. Thursday the 17th afternoon sees a 6ft SW swell with 7-second period and moderate cross-onshore wind – energy hits 291, so there’s some grunt, but the conditions are choppy. Not recommended. By the end of the period, from the 18th onward, it’s tiny and clean again but below waist high. The 20th morning bumps up to 6ft from the SW with 7-second period (342 energy), but it’s cross-on from the SE with a gentle breeze – fairly choppy, not clean enough to get excited about.
So, bottom line: the best bet is Monday the 14th afternoon at Fishermans (Rhiw) – glassy, clean, and rideable. Outside of that, it’s a long, quiet stretch. Things could change, but for now, pick your window carefully.
Rusty
Short Range ForecastLight rain (total 9mm), mostly falling on Mon night. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the WNW on Sun night, strong winds from the SSW by Mon night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Thu night, min 14°C on Wed morning). Winds decreasing (fresh winds from the WNW on Wed morning, calm by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 5 | SW 6 | SW 6 | SW 14 | SW 13 | WSW 7 | WSW 6 | W 6 | WNW 6 | WSW 6 | WSW 6 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 7 | SW 8 | SSW 6 | SW 7 | SW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 32 | 77 | 77 | 52 | 394 | 508 | 352 | 181 | 266 | 60 | 38 | 25 | 49 | 103 | 80 | 25 | 21 | 21 | 156 | 368 | 136 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | cross | cross-on | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-off | glassy | cross-on | cross-on | on | cross-on |
High Tide | 4:36PM3.02m | 5:28AM2.98m | 6:01PM3.28m | 6:41AM3.22m | 7:03PM3.65m | 7:36AM3.52m | 7:53PM4.02m | 8:20AM3.78m | 8:36PM4.30m | 9:01AM3.98m | 9:16PM4.46m | 9:39AM4.09m | 9:55PM4.48m | ||||||||
Low Tide | 11:19AM1.31m | 00:09AM1.06m | 12:42PM1.09m | 1:21AM0.71m | 1:43PM0.77m | 2:16AM0.35m | 2:31PM0.47m | 3:02AM0.05m | 3:14PM0.23m | 3:43AM-0.12m | 3:53PM0.09m | 4:21AM-0.15m | 4:29PM0.06m | ||||||||
 | |  | |  |  |  | | | | |  | | | | | | |  | | | |
 | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:46 | — | — |
 | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | — | 7:49 | — | — | 7:46 | — | — | 7:44 | — | — | 7:42 | — |
mm | — | — | — | — | — | 9 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 18 | 20 | 17 | 15 | 16 | 15 | 14 | 16 | 14 | 14 | 16 | 16 | 16 | 17 | 18 | 16 | 17 | 17 | 17 | 17 | 16 |
Feels °C | 12 | 16 | 14 | 11 | 11 | 7 | 6 | 8 | 5 | 7 | 12 | 13 | 11 | 13 | 15 | 14 | 17 | 16 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 13 | W 17 | SW 14 | NNW 4 | — | — | NNW 6 | — | WSW 6 | WSW 6 | NNW 5 | NW 4 | — | — | SW 6 | SW 7 | SW 8 | W 8 | — | SW 8 |
| kJ | 32 | 6 | 6 | 52 | 2 | — | — | 4 | — | 60 | 28 | 5 | 1 | — | — | 25 | 21 | 21 | 1 | — | 136 |
Swell 2 Height (m) Direction Period (s) | SW 13 | — | W 12 | WSW 10 | — | — | — | — | — | — | WSW 6 | WSW 8 | NNW 4 | — | — | SW 8 | NW 4 | NNW 4 | — | — | NW 4 |
| kJ | 7 | — | 3 | 9 | — | — | — | — | — | — | 38 | 6 | 2 | — | — | 16 | 9 | 2 | — | — | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 8 | — | — | WSW 6 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 3 | SW 6 | SW 6 | WSW 6 | SW 13 | WSW 7 | WSW 6 | W 6 | WNW 6 | NW 6 | NW 6 | SW 5 | SW 5 | SW 6 | SW 6 | NW 4 | NW 4 | — | SSW 6 | SW 7 | — |
| kJ | 5 | 77 | 77 | 38 | 394 | 508 | 352 | 181 | 266 | 171 | 52 | 25 | 49 | 103 | 80 | 11 | 4 | — | 156 | 368 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 188 | 296 | 186 | 7 | 276 | 257 | 464 | 498 | 498 | 305 | 317 | 292 | 236 | 306 | 255 | 7 | 107 | 136 | 255 | 292 | 7 |
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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