Surf Forecasts:
Fishermans (Rhiw) surf forecast from 16 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 5ft (1.6m), 6s period, SW swell with 176 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 1.2m 5s period and expected on Thursday (Aug 20) at 7AM.
| 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
Right then, folks. Rusty here. Let’s have a look at what the next couple of weeks are shaping up like for this corner of the coast. I’ll be straight with you—it’s a grim outlook, plain and simple. We’ve got a massive dry spell on our hands, with the first real chance of anything worthwhile not showing up until the very end of the month, and even that’s a long shot. So, get the gear ready for a rest, because the ocean’s going to be pretty quiet.
Looking at Fishermans (Rhiw), a beginner-friendly reef break that’s fairly consistent and can handle a SW swell. The water is sitting at 65°F which is a fair bit warmer than usual for this time of year. For the first week and a half, it’s a write-off. We’re talking tiny dribbles of swell, barely a ripple, with the odd bit of onshore junk. There is a brief uptick on the 19th of August where we see some moderate wave energy (121), with the swell bumping up to 5ft, but it’s coming with a 22 mph cross-onshore and a short 5-second period. It’s going to be a lumpy, messy affair, not one for the log or the shortboard. The following days just drop back to nothing.
The only flicker of life comes later on, around the 28th of August. Thursday the 28th has some moderate wave energy building, hitting 227 in the morning and 266 in the afternoon, with the swell sitting at 4ft from the SW with a slightly better 8-second period. It’s still a strong onshore wind, so it won't be pretty, but it’s the biggest pulse of the whole run. The problem is, with it being a reef, and the wind on it, it’s going to be messy and blown out. For a beginner, that 4ft isn't too daunting, but the wind makes it a tough ask.
Honestly, there’s no standout. The 28th of August is the only date with any meaningful size, but the conditions are poor. If you’re desperate and don't mind a battle, it’s your only option, but I wouldn't be calling it a winner.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Very mild (max 18°C on Mon night, min 14°C on Sun morning). Winds increasing (calm on Sun morning, fresh winds from the WSW by Tue night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Wed afternoon. Very mild (max 17°C on Wed afternoon, min 13°C on Thu night). Mainly strong winds. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 7 | SW 7 | SW 3 | WSW 5 | SW 5 | SW 4 | SW 6 | WSW 6 | WSW 4 | WSW 5 | SW 6 | WSW 5 | SW 6 | SW 6 | SW 14 | SW 14 | NW 4 | W 16 | SW 15 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 2 | 3 | 9 | 7 | 27 | 37 | 22 | 29 | 121 | 154 | 117 | 40 | 21 | 8 | 7 | 9 | 7 | 9 | 9 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross-off | glassy | cross-on | cross-off | cross-on | cross | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 11:22AM3.91m | 11:40PM4.24m | 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 | ||||||||
Low Tide | 6:09PM0.29m | 6:39AM0.30m | 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 | ||||||||
 | |  |  | |  | | |  | |  |  | | | | |  |  | | | | |
 | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — |
mm | — | — | — | — | — | 3 | — | — | — | — | 1 | 3 | 2 | — | 2 | — | — | — | — | — | — |
Temp °C | 15 | 16 | 17 | 16 | 16 | 18 | 16 | 18 | 18 | 16 | 17 | 17 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 15 | 14 |
Feels °C | 13 | 14 | 17 | 15 | 16 | 16 | 14 | 15 | 14 | 10 | 12 | 12 | 9 | 9 | 12 | 9 | 8 | 9 | 8 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | W 7 | WSW 5 | SW 5 | — | SW 6 | WSW 6 | W 17 | — | NW 5 | SW 16 | SW 6 | SW 6 | WSW 6 | WSW 6 | NW 4 | SW 13 | NNW 5 | SW 15 | NNW 4 |
| kJ | 2 | 2 | 1 | 9 | 7 | — | 37 | 22 | 6 | — | 4 | 10 | 40 | 21 | 3 | 3 | 9 | 7 | 7 | 9 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 3 | — | W 16 | NW 4 | — | — | — | — | W 15 | SW 14 | SW 14 | SW 14 | SW 6 | W 16 | SW 15 | SW 12 | SW 15 |
| kJ | — | — | — | — | 2 | — | 5 | 4 | — | — | — | — | 4 | 8 | 8 | 7 | 1 | 5 | 9 | 6 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 17 | — | — | — | — | — | — | NW 6 | W 14 | SW 13 | W 5 | — | W 10 | SW 12 |
| kJ | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | 1 | 4 | 7 | 1 | — | 2 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | SW 3 | NW 3 | WNW 3 | SW 4 | NW 4 | — | WSW 4 | WSW 5 | SW 6 | WSW 5 | NW 5 | NNW 5 | NNW 4 | NW 5 | — | N 4 | — | NNW 3 | ENE 3 |
| kJ | — | — | 3 | 1 | 1 | 27 | 4 | — | 29 | 121 | 154 | 117 | 85 | 40 | 26 | 18 | — | 9 | — | 3 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 292 | 310 | 195 | 298 | 331 | 554 | 199 | 1313 | 297 | 297 | 344 | 336 | 129 | 498 | 129 | 303 | 303 | 184 | 268 | 291 | 184 |
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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