Surf Forecasts:
Fishermans (Rhiw) surf forecast from 17 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 5ft (1.6m), 6s period, SW swell with 196 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 1.6m 6s and forecast to arrive on Wednesday (Aug 19) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Aug 20) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Wed 19th Aug) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, I’m not gonna sugarcoat it, mate. Fishermans (Rhiw) is looking grim. This reef break is beginner-friendly, exposed to SW swell, and right now the water is a warm 65°F, about 4°F above normal for the time of year—pretty unusual, feels like a heatwave.
The first surf window opens up Monday, 17 August, but it’s tiny: 0.5ft SW swell at 5 seconds, with only 13 units of combined energy (weak). It’s clean with a light cross-offshore breeze, but there’s nothing to ride. The whole week stays poor. Tuesday brings 3ft WSW swell, 6 seconds, 71 energy, but the wind is cross-shore or cross-on, making it lumpy. Wednesday the 19th has a 4ft SW swell, but onshore wind at 22 mph makes it a mess. Thursday the 20th cleans up with offshore wind at 19 mph, but the swell drops to 2ft. The rest of the week through the 25th is mostly flat—0.3ft and near-zero energy, with a long gap from the 21st to the 24th.
We get a little bump on Tuesday, 25 August morning: 2ft SSW swell with a 3-second period, weak at 16 energy. The afternoon picks up to 3ft SW, but it’s cross-shore. The real chance, if you can call it that, comes on Friday, 28 August. We’ve got 4ft SW swell, 9 seconds, and 281 energy (moderate)—that’s the biggest pulse of the forecast. But the wind is onshore from the SSW at 12 mph, so it’s blown out. Then on Sunday, 30 August, we see 6ft SW, 6 seconds, 224 energy, but cross-on wind at 12 mph keeps it choppy. The first week of September fades into small, onshore slop.
Honestly, there’s no real standout. The 28th and 30th of August have the most size, but the wind kills it. The cleanest session might be the 20th morning with offshore wind, but at 2ft, you’ll be scratching for a wave. For a beginner reef, this is a long dry spell—forecasts can change, but right now, it’s pretty bleak. If you’re desperate, wait for the 28th, but don’t expect much.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Mon night. Very mild (max 19°C on Tue afternoon, min 14°C on Tue night). Winds increasing (light winds from the NW on Mon morning, fresh winds from the W by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Thu afternoon, min 13°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | WSW 5 | SW 5 | SW 4 | WSW 6 | WSW 6 | WSW 4 | WSW 5 | SW 5 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 13 | W 16 | SW 13 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 7 | 29 | 47 | 23 | 46 | 48 | 98 | 131 | 40 | 19 | 9 | 7 | 7 | 7 | 9 | 9 | 8 | 8 | 7 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-off | off | off | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | off |
High Tide | 12:01PM3.72m | 00:20AM3.91m | 12:40PM3.48m | 1:01AM3.53m | 1:22PM3.21m | 1:46AM3.14m | 2:11PM2.93m | 2:45AM2.80m | 3:22PM2.70m | 4:14AM2.59m | 5:01PM2.65m | 5:49AM2.62m | 6:22PM2.82m | ||||||||
Low Tide | 6:44PM0.52m | 7:13AM0.62m | 7:20PM0.79m | 7:48AM0.95m | 7:59PM1.07m | 8:27AM1.25m | 8:50PM1.34m | 9:23AM1.49m | 10:11PM1.52m | 10:58AM1.60m | 00:02AM1.51m | 12:37PM1.49m | 1:19AM1.30m | ||||||||
 |  |  | | |  | |  | | |  |  | | |  | | | | | | | |
 | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:28 | — |
mm | — | — | 2 | — | — | 1 | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 18 | 16 | 19 | 16 | 16 | 17 | 17 | 15 | 16 | 14 | 14 | 16 | 15 | 15 | 16 | 14 | 15 | 16 | 15 |
Feels °C | 15 | 15 | 16 | 13 | 16 | 11 | 10 | 12 | 12 | 10 | 10 | 10 | 11 | 14 | 12 | 11 | 10 | 9 | 11 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 5 | SW 5 | — | WSW 6 | NW 4 | — | W 16 | — | — | SW 6 | SW 6 | SW 6 | NNW 4 | WSW 6 | NNW 4 | NNW 4 | SW 15 | SW 15 | NNW 5 | SW 14 | NNW 4 |
| kJ | 15 | 7 | — | 47 | 6 | — | 5 | — | — | 40 | 19 | 9 | 7 | 3 | 1 | 4 | 9 | 8 | 14 | 7 | 3 |
Swell 2 Height (m) Direction Period (s) | — | NW 3 | — | W 16 | W 17 | — | — | — | — | SW 15 | SW 14 | SW 14 | WSW 6 | SW 13 | SW 5 | SW 15 | — | W 12 | SW 14 | W 9 | SW 14 |
| kJ | — | 2 | — | 5 | 5 | — | — | — | — | 8 | 8 | 8 | 3 | 7 | 1 | 9 | — | 3 | 8 | 2 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 14 | SW 13 | W 16 | SW 13 | W 6 | W 12 | W 12 | W 9 | — | W 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 4 | 7 | 5 | 7 | 1 | 3 | 3 | 2 | — | 2 |
Wind waves Height (m) Direction Period (s) | — | — | SW 4 | NW 4 | WSW 6 | WSW 4 | WSW 5 | SW 5 | WSW 6 | NW 4 | NNW 4 | NNW 3 | — | NW 4 | — | ESE 3 | NNW 4 | NNW 3 | — | NNW 4 | ENE 3 |
| kJ | — | — | 29 | 5 | 23 | 46 | 48 | 98 | 131 | 29 | 26 | 4 | — | 8 | — | 2 | 2 | 4 | — | 13 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 298 | 329 | 554 | 7 | 464 | 297 | 297 | 285 | 336 | 129 | 195 | 129 | 129 | 303 | 114 | 114 | 190 | 303 | 305 | 306 | 216 |
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.
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