Surf Forecasts:
Fishermans (Rhiw) surf forecast from 25 Aug 2026:
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 4ft (1.2m), 5s period, SSW swell with 61 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 1.2m 5s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Friday (Aug 28) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 28th Aug) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, let’s break it down. You’re looking at a long stretch of flat and choppy water, with just one huge day right at the end that’s only for the hardcore.
First bit of anything is late Monday 26th August, but it’s tiny. Wednesday the 28th morning brings a little 4ft swell from the SW with a short 5-second period, but the onshore wind makes it lumpy. Not worth it. The first clean shot comes Tuesday morning the 3rd of September at Fishermans (Rhiw). You’ll get 6ft from the WNW with a moderate offshore N wind and clean conditions. Combined energy is 269 – moderate power – but the period is only 6 seconds, so it’ll be a bit weak and sectiony. Best of a bad bunch so far.
Then Thursday the 5th morning sees 6ft from the WSW, but the wind is cross-shore and messy. The real stand-out is Monday the 7th of September. That morning, Fishermans (Rhiw) gets a massive 16ft swell from the WSW with a long 11-second period. Light offshore wind from the NNW, energy is a massive 5551 – that’s very strong and powerful. Water temp sits around 63°F, a touch warmer than usual for the time of year. But this is for experts only. Over 8ft, it’s too big for pretty much anyone but the best. That reef set-up with long-period groundswell will be heavy, hollow, and unforgiving. Monday afternoon stays huge at 15ft, still clean but still only for the brave.
The gaps are long – from now until September 3rd there’s almost nothing rideable. After the 7th, it drops back into onshore chop. If you’re a beginner, stay on the beach until the 3rd, and even then be careful. The one true standout is that big Monday the 7th, and it’s not for the faint of heart.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Warm (max 22°C on Tue afternoon, min 15°C on Mon night). Winds decreasing (fresh winds from the E on Mon night, calm by Wed afternoon). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Very mild (max 19°C on Fri night, min 16°C on Thu night). Winds increasing (light winds from the SSW on Thu afternoon, fresh winds from the SSW by Sun morning). | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 | SW 13 | ESE 4 | S 4 | SSW 8 | W 12 | W 12 | W 12 | SW 8 | SW 5 | SW 7 | SW 7 | W 5 | NW 5 | SW 4 | SW 8 | SW 8 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 7 | 7 | 7 | 7 | 16 | 7 | 6 | 3 | 3 | 3 | 10 | 51 | 47 | 37 | 46 | 17 | 7 | 24 | 36 | 26 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-on | glassy | cross-off | glassy | on | cross-on | cross-on | cross-on | cross | on | on | cross-on | on | on | cross-on |
High Tide | 7:16PM3.08m | 7:39AM3.02m | 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 | |||||||
Low Tide | 2:08AM1.03m | 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 | ||||||||
 |  |  | | | |  | |  | | |  | |  |  | | | | |  | |
 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — |
 | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:12 | — |
mm | — | — | — | — | — | — | 1 | — | 6 | 3 | — | — | — | 3 | 1 | 1 | — | 2 | 5 | 4 |
Temp °C | 21 | 19 | 18 | 22 | 20 | 18 | 19 | 19 | 18 | 17 | 17 | 16 | 17 | 19 | 16 | 17 | 18 | 17 | 16 | 16 |
Feels °C | 17 | 13 | 17 | 19 | 16 | 17 | 20 | 18 | 19 | 17 | 15 | 11 | 15 | 17 | 13 | 14 | 14 | 11 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | — | SW 13 | SW 13 | — | SW 8 | SSW 8 | SSW 3 | SW 7 | S 7 | — | SW 8 | — | SW 7 | SW 7 | — | NW 5 | SW 4 | SW 8 | SW 8 | SW 7 |
| kJ | — | 7 | 7 | — | 3 | 6 | 1 | 2 | 1 | — | 10 | — | 47 | 37 | — | 13 | 7 | 24 | 36 | 26 |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 8 | SW 8 | N 5 | W 13 | SSW 8 | W 12 | W 12 | S 7 | — | — | — | — | — | SW 6 | SW 5 | WSW 8 | NW 4 | NNW 5 |
| kJ | 3 | 3 | 3 | 3 | 2 | 3 | 6 | 3 | 3 | 1 | — | — | — | — | — | 17 | 5 | 7 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | SW 13 | — | — | SW 13 | SW 13 | — | W 12 | — | — | W 12 | — | — | — | — | — | — | — | — | SW 4 | — |
| kJ | 7 | — | — | 7 | 7 | — | 3 | — | — | 3 | — | — | — | — | — | — | — | — | 1 | — |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | E 3 | — | ESE 4 | S 4 | — | NNE 2 | — | — | SSW 4 | SW 5 | SW 4 | NW 4 | W 5 | WSW 4 | NW 3 | NW 4 | — | — |
| kJ | — | 18 | 6 | — | 16 | 7 | — | 1 | — | — | 5 | 51 | 7 | 12 | 46 | 3 | 5 | 12 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 295 | 268 | 256 | 248 | 190 | 216 | 216 | 305 | 298 | 256 | 114 | 250 | 7 | 297 | 292 | 295 | 260 | 292 | 292 | 309 |
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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