Surf Forecasts:
Fishermans (Rhiw) surf forecast from 10 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 4PM (local time) - 7ft (2.1m), 7s period, SW swell with 410 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 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Tuesday (Sep 15) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Thu 10th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it for Fishermans (Rhiw). I’ve got to be straight with you – this 16-day window is a tough one. The water temp right now is about average for this time of year; nothing wild happening there.
We start off with a couple of days of proper mush. Thursday the 10th and Friday the 11th are a write-off, with onshore winds and tiny, weak swell. The combined energy is pitiful, only hitting 69 on Thursday morning. Not worth paddling out for.
Saturday the 12th sees a bump in size – 7 ft of SW swell – but it’s got a short period of 6 to 7 seconds, and the wind is hammering straight on from the SW at up to 25 mph. The energy jumps to 347, but it’s just messy, onshore slop. You’d be fighting a losing battle.
Sunday the 13th gives us a little glimmer. The morning brings clean conditions with an offshore wind from the N at 9 mph, but the swell is tiny at 2 ft, period a short 6 seconds. Combined energy is only 37. It’s clean, but flat. Monday the 14th and Tuesday the 15th are back to onshore winds and weak surf.
We go through a long, flat spell from Wednesday the 16th right through to Saturday the 19th. Groundswell on the 18th with a 13-second period? Yeah, but it’s barely 0.3 ft – no energy at all. A total blank stretch of about three to four days where you’d be better off cleaning your board.
Then, something finally shows up. Sunday the 20th is our standout. The morning is still a bit marginal, but by the afternoon, we’ve got 7 ft of swell from the NW with a 6-second period. The wind turns offshore from the NW at 9 mph, glassing it right up. The break is a reef, which handles that short-period swell fine, and the combined energy is a solid 339. This is going to be good, clean fun. Crowds can be a factor here sometimes, so get in early. It’s offering the best conditions in a long, dry run.
Monday the 21st drops back to poor onshore junk, and the rest of the week into the 25th is just a mix of cross-onshore and onshore winds with weak swell. On the 25th, the wind is strong cross-shore at 25 mph, making it more of a kite-surfing setup than anything else for paddle surfing.
So, to wrap it up: forget the first week and a half, but circle Sunday the 20th. That afternoon session at Fishermans is your only real chance for a clean wave. One day on offer, and it looks worth the wait.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Thu morning, calm by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Tue morning. Very mild (max 18°C on Mon morning, min 13°C on Sun morning). Winds increasing (light winds from the NW on Sun morning, fresh winds from the S by Mon night). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 7 | WSW 7 | SW 8 | WSW 8 | SW 4 | SW 6 | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 5 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | WSW 6 | W 11 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 67 | 410 | 185 | 57 | 44 | 29 | 325 | 347 | 111 | 34 | 20 | 9 | 69 | 141 | 161 | 73 | 25 | 5 | 3 | 2 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross | cross-off | glassy | on | on | on | cross-off | off | cross-on | on | on | on | on | on | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 11:26AM3.85m | 11:45PM3.81m | 12:01PM3.59m | 00:22AM3.44m | |||||||
Low Tide | 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 | 5:57AM0.42m | 6:07PM0.51m | 6:26AM0.72m | 6:39PM0.77m | ||||||||
 | |  |  |  |  | | | | |  | | | | |  | | | | | | |
 | 6:41 | — | — | 6:43 | — | — | 6:46 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — |
 | — | 7:46 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:35 | — | — | 7:31 | — |
mm | 1 | 2 | 2 | — | — | — | 1 | — | 2 | — | — | — | — | — | — | 5 | — | 2 | 1 | — | — |
Temp °C | 16 | 17 | 18 | 14 | 14 | 16 | 16 | 18 | 17 | 14 | 14 | 16 | 18 | 18 | 17 | 17 | 17 | 15 | 14 | 14 | 14 |
Feels °C | 9 | 12 | 14 | 10 | 13 | 9 | 9 | 13 | 16 | 13 | 13 | 13 | 15 | 14 | 14 | 12 | 13 | 9 | 7 | 8 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 8 | — | — | SW 8 | WSW 8 | — | — | — | SW 7 | SW 6 | SW 6 | SW 6 | W 12 | W 9 | W 12 | SW 6 | WSW 6 | SW 6 | WSW 6 | SW 6 | NNW 4 |
| kJ | 2 | — | — | 57 | 44 | — | — | — | 111 | 34 | 20 | 9 | 3 | 2 | 3 | 73 | 25 | 5 | 3 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 4 | NW 4 | — | — | — | W 13 | NNW 5 | NW 4 | W 9 | — | — | — | W 11 | W 11 | — | W 11 | SW 6 |
| kJ | — | — | — | — | 5 | 1 | — | — | — | 3 | 4 | 1 | 2 | — | — | — | 2 | 2 | — | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | WNW 4 | — | — | — | — | — | — | — | — | — | W 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 2 |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 7 | WSW 7 | NW 4 | — | SW 4 | SW 6 | SW 7 | NW 3 | NNW 5 | — | SW 3 | SW 5 | SW 6 | SW 6 | NW 4 | NW 5 | NW 5 | NW 5 | NW 4 | — |
| kJ | 67 | 410 | 185 | 9 | — | 29 | 325 | 347 | 5 | 19 | — | 2 | 69 | 141 | 161 | 15 | 55 | 82 | 23 | 9 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 317 | 96 | 236 | 129 | 2 | 232 | 269 | 366 | 30 | 114 | 129 | 185 | 255 | 255 | 136 | 240 | 575 | 146 | 285 | 176 | 142 |
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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