Surf Forecasts:
Fishermans (Rhiw) surf forecast from 8 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 7ft (2.1m), 7s period, SW swell with 416 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 Thursday (Sep 10) at 7PM. 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 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Thu 10th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer at Fishermans (Rhiw) over the coming weeks. I’ll be honest with you, it’s a bleak picture. The forecast is a long, flat stretch with nothing worth paddling out for. The water is sitting at 63°, which is a touch warmer than normal for this time of year, but that’s about the only bit of good news.
We kick off on Tuesday, 8th September, but it’s a no-go from the start. A fresh cross-shore wind is blowing at 19 mph, making a mess of the weak 4 ft to 5 ft swell from the west. The combined wave energy is a paltry 81 to 106 (moderate), but the period is a short 5 seconds, so the waves are just crumbly and lumpy. The wind stays onshore or cross-shore for the next several days, keeping the surf poor. There’s a brief moment on the morning of Friday, 11th September, where the wind goes light cross-offshore and the conditions clean up, but the swell drops to just 2 ft (energy down to 72). It’s not enough to get excited about.
The window gets a bit of a pulse on the 12th with a 7 ft west-southwest swell in the afternoon, but it’s accompanied by a strong 25 mph onshore wind and a short period of 7 seconds. The energy climbs to 347 (strong), but those conditions are a complete write-off. It’s a similar story on the 14th, with a 4 ft swell and onshore winds, so there’s nothing clean on offer.
After that, the swell just fades away. From the 16th of September onwards, the heights drop to 0.7 ft or less. The energy readings are in the single digits (2 to 14), and the periods are either very short (4 to 6 seconds) or, interestingly, very long (16 seconds) on the 19th and 20th. Even though the wind goes glassy or offshore on a few occasions—like the morning of the 17th with a glassy 0.3 ft—there’s just no water to work with. A 0.3 ft wave with a 16-second period might look clean, but it’s not going to break.
So, the bottom line is there are no good surf options in the entire 16-day window. Fishermans (Rhiw) is a fairly consistent reef break normally, but this run is a true blank. With no standouts to speak of, I’d say sit this one out. Forecasts can change, but right now, it’s a flat, windy mess.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu night, min 13°C on Tue night). Winds decreasing (strong winds from the NW on Tue night, light winds from the WNW by Wed afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 17°C on Sat night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Sat morning, light winds from the WSW by Sun afternoon). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | W 5 | W 5 | WSW 6 | WSW 8 | NW 5 | SW 4 | SW 5 | SW 7 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 5 | SW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 81 | 106 | 31 | 43 | 25 | 10 | 56 | 337 | 208 | 72 | 53 | 51 | 150 | 347 | 135 | 37 | 21 | 32 | 38 | 89 | 111 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross | on | on | on | cross | cross-off | cross-off | cross-on | on | on | cross-on | cross | cross-on | on | on | on | on |
High Tide | 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 | 10:15AM4.11m | 10:32PM4.37m | 10:51AM4.02m | 11:09PM4.13m | ||||||||
Low Tide | 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 | 4:55AM-0.05m | 5:03PM0.13m | 5:27AM0.15m | 5:36PM0.29m | ||||||||
 |  |  | | |  |  |  |  | |  | | | | | | | | | | | |
 | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — |
 | — | 7:51 | — | — | 7:49 | — | — | 7:46 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — |
mm | — | 1 | — | — | — | — | — | 3 | 1 | — | — | — | 1 | 2 | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 15 | 13 | 14 | 15 | 16 | 16 | 17 | 14 | 15 | 15 | 15 | 16 | 17 | 15 | 16 | 16 | 17 | 19 | 19 |
Feels °C | 8 | 8 | 7 | 7 | 10 | 10 | 9 | 10 | 13 | 9 | 12 | 11 | 7 | 10 | 13 | 13 | 16 | 14 | 14 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 6 | WSW 8 | NW 5 | NNW 4 | SW 7 | — | WSW 8 | SW 8 | SW 8 | NW 4 | — | — | SW 7 | SW 7 | SW 7 | — | — | — | W 12 |
| kJ | — | — | 31 | 43 | 25 | 2 | 2 | — | 208 | 72 | 53 | 1 | — | — | 135 | 37 | 21 | — | — | — | 3 |
Swell 2 Height (m) Direction Period (s) | — | — | W 9 | WSW 8 | WSW 8 | — | — | — | — | — | NNW 5 | NNW 4 | — | — | — | NW 4 | NNW 4 | — | W 8 | — | — |
| kJ | — | — | 2 | 6 | 24 | — | — | — | — | — | 14 | 1 | — | — | — | 4 | 2 | — | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | NW 6 | NW 6 | WSW 4 | SW 4 | SW 5 | SW 7 | — | NW 5 | — | SW 8 | SW 6 | SW 7 | — | — | — | SW 6 | SW 5 | SW 5 | SW 6 |
| kJ | 81 | 106 | 181 | 86 | 3 | 10 | 56 | 337 | — | 35 | — | 51 | 150 | 347 | — | — | — | 32 | 38 | 89 | 111 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 145 | 498 | 498 | 129 | 7 | 146 | 345 | 325 | 7 | 129 | 7 | 129 | 255 | 269 | 257 | 129 | 129 | 232 | 240 | 255 | 188 |
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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