Surf Forecasts:
Fishermans (Rhiw) surf forecast from 25 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 4PM (local time) - 8ft (2.5m), 8s period, SW swell with 838 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 2.5m 8s and forecast to arrive on Tuesday (Sep 01) 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 1.3m 6s period and expected on Saturday (Aug 29) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Tue 1st Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for the next couple of weeks. I’ll tell you straight up, it’s looking grim for a while. The first real surf we see is a flash in the pan, and then it’s mostly a write-off for ages.
We’re starting with a tiny, weak signal from Fishermans (Rhiw). The first proper surf window is a bit of a letdown, nothing to get excited about. The combined swell energy is a measly 10 (weak). The water is 64°, which is a touch warmer than normal for this time of year, so at least it’s not freezing.
From the 25th of August all the way through to the 28th, it’s flat or tiny. We’re talking ankle-biters at best, with wind mostly cross-off or light, but no power. The surf just isn’t there.
Then on the 28th of August, Friday morning, we get a tiny pulse of 3 ft from the SW, but it’s a short-period 8 seconds with an onshore wind. The combined energy is 118 (moderate), but the quality is poor. Not a day to get the quiver out.
The 29th of August kicks up a bit. Saturday morning sees 6 ft from the SW, but the period is a rubbish 6 seconds, and it’s a fresh cross-shore wind with a lumpy cross-chop. The energy is 275 (moderate), but it’s messy. Saturday afternoon drops to 4 ft, still with a cross-onshore wind. This is not a paddle surfer’s wave. With that much wind and swell, it’s looking more interesting for kite surfing than a traditional surf.
Then the 30th and 31st of August are a write-off. Strong winds, onshore, and lumpy. The 1st of September looks downright dangerous. We’re looking at 7 ft rising to 8 ft from the SW, but it’s being hammered by a near gale force onshore wind. The energy spikes to 838 (strong), but it’s absolutely blown out. This is strictly for experts only, and even then, it’s a no-go.
The pattern continues through the first week of September. There’s a bit of swell around, 5 ft to 6 ft, but the wind is constantly cross or onshore and strong. The 5th of September, Saturday morning, has 6 ft from the SW with an 8-second period, energy at 460 (strong), but it’s a fresh cross-shore with lumpy chop. Again, not clean.
The 6th of September has another 7 ft pulse, but it’s onshore again. The whole period is a frustrating mix of size and wind. The last few days of the forecast, the 7th through the 9th, it all fades back to nothing. The 9th of September Wednesday morning has a long-period 1 ft from the WSW, but it’s a ghost.
The standout, if you can call it that, is the 1st of September. It’s got the most size, but it’s only for the brave and the experienced. For everyone else, it’s a 16-day window of mostly frustration. The set-up looks more interesting for kite surfing than paddle surfing for most of the second week.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Warm (max 22°C on Tue afternoon, min 16°C on Tue morning). Winds decreasing (strong winds from the E on Tue night, light winds from the NNE by Wed afternoon). | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Sun morning. Very mild (max 18°C on Sat night, min 14°C on Sun night). Winds increasing (light winds from the W on Sat night, near gales from the W by Sun night). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 13 | SW 13 | SW 13 | SSW 8 | SSW 8 | W 12 | SW 12 | W 12 | SSW 4 | SW 8 | SW 7 | SW 6 | SW 6 | SW 8 | SW 9 | SW 9 | SW 8 | SW 7 | SW 8 | WSW 8 | SW 5 |
Wave Graph | |||||||||||||||||||||
7 | 7 | 7 | 6 | 6 | 3 | 6 | 3 | 16 | 95 | 26 | 83 | 275 | 182 | 129 | 107 | 53 | 47 | 35 | 103 | 74 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross | cross-off | off | cross-off | cross-off | on | on | on | cross-on | on | cross | cross-on | cross-on | cross-on | on | cross | cross | cross-on | cross-on |
High Tide | 7:55PM3.37m | 8:14AM3.26m | 8:28PM3.66m | 8:46AM3.48m | 8:59PM3.92m | 9:16AM3.67m | 9:29PM4.12m | 9:47AM3.83m | 10:01PM4.26m | 10:18AM3.93m | 10:34PM4.30m | 10:52AM3.97m | 11:09PM4.25m | ||||||||
Low Tide | 2:17PM0.97m | 2:46AM0.75m | 2:53PM0.72m | 3:20AM0.50m | 3:26PM0.50m | 3:53AM0.30m | 3:59PM0.35m | 4:26AM0.17m | 4:32PM0.27m | 4:59AM0.12m | 5:04PM0.26m | 5:32AM0.17m | 5:38PM0.34m | ||||||||
6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | |
— | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:12 | — | — | 8:09 | — | |
mm | — | — | 1 | — | — | — | 2 | 3 | — | 1 | — | 6 | 1 | — | 1 | 10 | 2 | 3 | — | — | — |
Temp °C | 19 | 22 | 21 | 18 | 21 | 21 | 17 | 18 | 17 | 17 | 17 | 17 | 16 | 17 | 18 | 17 | 16 | 15 | 15 | 18 | 17 |
Feels °C | 17 | 17 | 14 | 17 | 20 | 20 | 15 | 15 | 14 | 14 | 15 | 14 | 10 | 14 | 16 | 11 | 9 | 7 | 8 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 8 | SW 8 | SSW 8 | SSW 8 | SW 7 | S 7 | S 6 | SW 8 | SW 8 | SW 7 | SW 6 | — | SW 8 | SW 9 | NW 4 | SW 8 | SW 7 | SW 8 | NW 4 | — |
7 | 3 | 3 | 6 | 6 | 2 | 1 | 1 | 11 | 23 | 26 | 56 | — | 182 | 129 | 6 | 53 | 47 | 35 | 9 | — | |
Swell 2 Height (m) Direction Period (s) | SW 8 | SW 13 | SW 13 | W 13 | — | — | SW 12 | W 12 | SW 5 | — | — | NW 3 | — | — | — | NW 4 | NNW 4 | — | SW 10 | — | — |
3 | 7 | 7 | 3 | — | — | 6 | 3 | 1 | — | — | 2 | — | — | — | 3 | 1 | — | 15 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 12 | W 12 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 3 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 3 | E 3 | ESE 4 | ESE 3 | — | — | ESE 2 | — | SSW 4 | SW 8 | WSW 4 | SW 6 | SW 6 | NW 6 | W 4 | SW 9 | — | — | NW 4 | WSW 8 | SW 5 |
5 | 1 | 19 | 3 | — | — | 1 | — | 16 | 95 | 15 | 83 | 275 | 107 | 40 | 107 | — | — | 11 | 103 | 74 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 256 | 216 | 139 | 278 | 256 | 305 | 298 | 298 | 136 | 96 | 265 | 309 | 137 | 7 | 7 | 292 | 297 | 614 | 505 | 464 | 255 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











