Surf Forecasts:
Fishermans (Rhiw) surf forecast from 1 Sep 2026:
- Most powerful swell: Friday 4 Sep, 1AM (local time) - 8ft (2.4m), 7s period, SW swell with 596 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 Friday (Sep 04) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Saturday (Sep 05) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Fri 4th Sep) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, let's get into it. Fishermans (Rhiw) is a reef break that's designed for a SW swell, but the next 16 days are mostly a bust. The water is a warm 64°F, which is a solid 4°F above normal for this time of year, so it's a pleasant swim, but that's about it.
The entire forecast period, from the end of August through mid-September, is a flat, blown-out mess. Every single session is listed as "poor surf conditions." We get a bit of a pulse on the 4th of September, with a 5-foot swell from the WSW and a combined energy of 252. That's a decent amount of power, but a 19 mph cross-shore wind from the W is going to make it lumpy and unappealing. The only other moment of potential is the morning of the 5th of September, where the wind goes glassy from the ENE, but the swell is only 1 feet – not enough to ride.
The strongest swells come in on the 8th and 9th of September, with 5-foot and 6-foot waves from the SW, but the wind is onshore and howling, creating a total mess. By the 10th, we're looking at a severe gale, so forget about it. The later part of the run, from the 11th to the 15th, has some clean, offshore winds, but the swell is virtually non-existent, with energy readings of just 7 and 2. It's a cruel tease.
If you had to pick one session, it would be the morning of the 4th of September. You'll get a 5-foot swell from the WSW, which is the right direction, and the energy is 252. But the wind is a 19 mph cross-shore making it lumpy. It's a "maybe" session for the committed. After that, there's a long stretch of nothing. From the 13th to the 15th, there's zero swell on the charts. A few clean days in the second week won't help without any waves.
There's nothing here to get excited about. The only real standout is a single, compromised window on the 4th of September. The rest is a flat spell with a few stormy interruptions. Don't hold your breath.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Tue afternoon. Very mild (max 18°C on Wed afternoon, min 15°C on Mon night). Winds increasing (light winds from the W on Mon afternoon, strong winds from the S by Wed morning). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Thu night. Warm (max 20°C on Sun morning, min 12°C on Sat morning). Winds decreasing (near gales from the SW on Thu night, calm by Sat morning). | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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) | WSW 9 | WSW 8 | SW 4 | SW 5 | WSW 5 | SSW 4 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 8 | WSW 7 | SW 6 | SW 6 | SW 6 | SW 13 | SW 13 | SW 4 | SW 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 141 | 43 | 22 | 41 | 42 | 30 | 138 | 314 | 111 | 74 | 596 | 244 | 96 | 34 | 12 | 5 | 7 | 7 | 6 | 13 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-off | glassy | cross-on | cross-on | cross-on | cross-on | on |
High Tide | 11:09PM4.25m | 11:28AM3.91m | 11:47PM4.09m | 12:08PM3.76m | 00:30AM3.83m | 12:53PM3.53m | 1:20AM3.49m | 1:48PM3.26m | 2:25AM3.15m | 3:02PM3.03m | 3:52AM2.93m | 4:36PM3.02m | ||||||||
Low Tide | 5:38PM0.34m | 6:05AM0.31m | 6:13PM0.48m | 6:41AM0.53m | 6:51PM0.67m | 7:22AM0.79m | 7:39PM0.91m | 8:16AM1.08m | 8:50PM1.14m | 9:38AM1.30m | 10:31PM1.24m | 11:19AM1.31m | 00:09AM1.06m | |||||||
 |  |  |  |  |  |  | | | | | | | | | |  | | | | |
 | — | — | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — |
 | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — |
mm | — | — | — | 1 | 4 | 2 | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 16 | 16 | 17 | 16 | 18 | 17 | 18 | 18 | 18 | 15 | 18 | 16 | 13 | 15 | 16 | 20 | 22 | 19 |
Feels °C | 15 | 14 | 12 | 11 | 13 | 11 | 14 | 13 | 14 | 11 | 10 | 9 | 13 | 11 | 12 | 12 | 14 | 15 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 8 | NW 4 | — | W 16 | W 16 | — | — | SW 14 | — | — | SW 14 | NW 5 | SW 6 | SW 6 | SW 6 | WSW 6 | WSW 4 | SW 4 | SW 5 |
| kJ | 141 | 43 | 1 | — | 5 | 5 | — | — | 8 | — | — | 8 | 19 | 34 | 12 | 5 | 3 | 2 | 4 | 13 |
Swell 2 Height (m) Direction Period (s) | NW 5 | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 14 | NW 4 | NNW 4 | W 7 | SW 13 | SW 13 | SW 12 |
| kJ | 25 | — | — | — | — | — | — | — | — | — | — | — | 8 | 8 | 5 | 2 | 1 | 7 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 14 | SW 14 | SW 8 | SW 13 | W 8 | W 8 | W 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 7 | 2 | 7 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | WNW 5 | NW 4 | SW 4 | SW 5 | WSW 5 | SSW 4 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 8 | WSW 7 | NW 4 | — | — | — | SSE 2 | SSE 3 | SW 3 |
| kJ | 17 | 6 | 22 | 41 | 42 | 30 | 138 | 314 | 111 | 74 | 596 | 244 | 96 | 5 | — | — | — | 1 | 3 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 7 | 7 | 240 | 269 | 232 | 305 | 321 | 346 | 255 | 317 | 96 | 319 | 257 | 129 | 107 | 136 | 129 | 210 | 331 | 305 |
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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