Surf Forecasts:
Fishermans (Rhiw) surf forecast from 12 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 1PM (local time) - 5ft (1.6m), 6s period, SW swell with 161 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 Tuesday (Aug 18) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Aug 15) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Tue 18th Aug) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight with you – we’re looking at a 16-day run, and for the first week or so, it’s a tough watch.
The main wave we’ve got in the mix here is Fishermans (Rhiw). It’s a reef setup, fairly exposed to the swell, and usually pretty consistent. The problem is, for the first several days, there’s just no energy to work with. We’re talking flat to ankle-snappers up until the 18th of August. The swell is tiny, the period is short, and the energy readings are weak, like 13-18. We get a tease of clean conditions thanks to offshore to cross-offshore winds on the 14th and 15th, but there’s nothing to actually ride. That’s a long gap of nothing.
Then, on the morning of Tuesday, 19th August, the dial finally moves. The swell comes up to about 5 ft from the WSW, but the wind is howling from the same direction at 28 mph, making a strong, messy, cross-onshore mess. That’s not surf, that’s a washing machine. The period is a weak 6 seconds too, so no real shape. The next day, Wednesday morning, 20th August, we see a big jump: 8 ft from the NW, with a period of 7 seconds and a strong offshore breeze from the NNW at 25 mph. That’s a lot of water moving – the energy reading is 583 – but 8 ft is big, steep, and chunky for a beach and reef setup, and with that kind of wind and size, it’s strictly for experienced crew only. That morning is the standout, but it’s a raw, wild one.
Later on, around Saturday 22nd and Sunday 23rd August, there are glimpses of hope with glassy conditions and small, clean swell around 2 to 3 ft from the SW. The wind goes light as a whisper, but the swell is tiny and the period is very short, so don’t get your hopes up for anything with much punch.
Overall, the only true standout on this entire run is that Wednesday morning, 20th August, at Fishermans. It’s a big, powerful, offshore swell, but it’s a beast for experts only. The rest of the window is a write-off. This stretch of poor conditions looks pretty normal for the area when the swell just doesn’t connect.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 16°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Mon morning. Very mild (max 16°C on Fri night, min 13°C on Sat morning). Winds decreasing (fresh winds from the N on Sat morning, calm by Sun night). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 10 | WSW 10 | SW 9 | SW 8 | SW 8 | SW 5 | SW 5 | SW 5 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | W 7 | W 7 | W 7 | W 7 | SW 5 | SW 6 | SW 6 | WSW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 9 | 21 | 17 | 14 | 22 | 11 | 3 | 7 | 5 | 5 | 2 | 2 | 1 | 1 | 1 | 1 | 61 | 129 | 131 | 118 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | on | on | cross-on | cross-on | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | cross-off | glassy | cross-on | cross | cross | on | on | cross-on |
High Tide | 8:33AM3.80m | 8:52PM4.29m | 9:19AM3.95m | 9:37PM4.49m | 10:02AM4.03m | 10:19PM4.55m | 10:42AM4.01m | 11:00PM4.46m | 11:22AM3.91m | 11:40PM4.24m | 12:01PM3.72m | 00:20AM3.91m | 12:40PM3.48m | 1:01AM3.53m | |||||||
Low Tide | 3:32PM0.26m | 4:04AM-0.10m | 4:15PM0.11m | 4:46AM-0.19m | 4:54PM0.07m | 5:26AM-0.15m | 5:32PM0.14m | 6:03AM0.03m | 6:09PM0.29m | 6:39AM0.30m | 6:44PM0.52m | 7:13AM0.62m | 7:20PM0.79m | ||||||||
 |  |  | |  |  | | | | | | | | | |  | | | | | | |
 | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — |
 | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | 1 | — |
Temp °C | 23 | 25 | 25 | 21 | 21 | 18 | 17 | 17 | 16 | 13 | 15 | 15 | 14 | 16 | 16 | 14 | 15 | 15 | 17 | 17 | 18 |
Feels °C | 21 | 23 | 24 | 21 | 21 | 18 | 17 | 14 | 13 | 6 | 9 | 10 | 11 | 13 | 14 | 12 | 14 | 15 | 14 | 12 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | SW 9 | SW 8 | SW 8 | SW 5 | SW 5 | SW 5 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | W 7 | NNW 4 | — | — | — | — | W 17 | — |
| kJ | 10 | 9 | 21 | 17 | 14 | 22 | 11 | 3 | 7 | 5 | 5 | 2 | 2 | 1 | 4 | — | — | — | — | 5 | — |
Swell 2 Height (m) Direction Period (s) | SW 6 | SW 6 | — | — | SW 10 | SW 9 | SW 8 | SW 8 | — | — | — | — | — | — | W 7 | W 7 | W 7 | — | — | — | — |
| kJ | 1 | 1 | — | — | 4 | 3 | 3 | 2 | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 6 | — | — | — | — | SW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 2 | — | — | — | — | WSW 4 | NW 4 | NW 4 | N 4 | NNW 5 | NNW 5 | N 4 | NNW 5 | NNW 4 | — | — | SW 2 | SW 5 | SW 6 | SW 6 | WSW 5 |
| kJ | 1 | — | — | — | — | 16 | 3 | 12 | 9 | 40 | 54 | 15 | 12 | 13 | — | — | 1 | 61 | 129 | 131 | 118 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 185 | 114 | 114 | 137 | 298 | 142 | 129 | 129 | 281 | 319 | 538 | 297 | 297 | 312 | 309 | 305 | 303 | 2 | 66 | 297 | 297 |
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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