Surf Forecasts:
Fishermans (Rhiw) surf forecast from 12 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 7AM (local time) - 6ft (1.9m), 6s period, WSW swell with 268 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 1.9m 6s and forecast to arrive on Tuesday (Aug 18) at 7AM. 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 5s period and expected on Wednesday (Aug 19) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Tue 18th Aug) | 6ft (1.9m) 6s |
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 gotta be straight with you, it's a real tough watch for Fishermans (Rhiw). We've got a solid 16-day window, but to be honest, the surf is looking pretty average for the vast majority of it. The first real shot at anything worth paddling out for doesn't come until Tuesday the 18th, and even that's a bit of a mess.
From now until then, we're looking at a long stretch of tiny, weak waves. The water temp is sitting at about 64°F right now, which is a touch warmer than normal for this time of year, so at least the dips won't be a shock to the system. But for surfing? It's a real struggle. There's a few days with a clean-looking surface, like Wednesday the 12th afternoon with a light cross-offshore, but the swell is a paltry 0.7ft. It's just not enough to get excited about.
Then, on Tuesday the 18th, we get a bit of a pulse. The morning sees a 5ft swell from the WSW, but it's short period at 6 seconds and the wind is a strong 25 mph cross-onshore. The combined energy is moderate at 181, but it's going to be messy and choppy. That afternoon cleans up, but the swell drops right back down to 3ft.
The one window that might be worth a look, if you're keen, is late in the period. On Thursday the 27th, the afternoon shows a 5ft swell from the SW, with a 6-second period and a moderate offshore wind from the north. The combined energy is moderate at 143, and it's clean. It's not a world-beater, but it's the only time in the whole forecast where the conditions come together for something actually surfable. For a beginner, that 5ft might be a bit on the big side, but for anyone else, it's the best we've got on offer.
Other than that, from the 18th onward, it's mostly tiny, clean waves, but the swell energy is just too low. It's a frustrating outlook for the area, but sometimes you get these blank runs. The forecasts can change, so keep an eye on it, but for now, don't hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 14°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NNW by Fri night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Mon night. Very mild (max 17°C on Mon night, min 13°C on Sat morning). Winds increasing (calm on Sun night, fresh winds from the SW by Mon 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 | WSW 4 | SW 4 | SW 5 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | W 7 | W 7 | W 7 | SW 5 | SW 5 | WSW 6 | SW 6 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 9 | 21 | 17 | 14 | 17 | 9 | 3 | 7 | 5 | 5 | 2 | 2 | 1 | 1 | 1 | 1 | 77 | 176 | 56 | 19 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | on | on | cross-on | cross-on | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | on | on | on | cross-on | cross-off | cross-off |
High Tide | 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 7 | — | — | — |
Temp °C | 24 | 26 | 25 | 21 | 21 | 19 | 17 | 18 | 17 | 14 | 16 | 15 | 15 | 16 | 16 | 15 | 15 | 17 | 18 | 18 | 17 |
Feels °C | 23 | 24 | 24 | 21 | 21 | 19 | 17 | 15 | 14 | 8 | 11 | 11 | 11 | 12 | 14 | 13 | 12 | 13 | 13 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | SW 9 | SW 8 | SW 8 | SW 8 | SW 4 | SW 5 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | W 7 | NNW 4 | — | SW 5 | — | W 16 | SW 6 | SW 6 |
| kJ | 10 | 9 | 21 | 17 | 14 | 2 | 9 | 3 | 7 | 5 | 5 | 2 | 2 | 1 | 2 | — | 1 | — | 5 | 56 | 19 |
Swell 2 Height (m) Direction Period (s) | SW 6 | SW 6 | — | — | SW 10 | SW 9 | — | SW 8 | — | W 10 | — | — | — | — | W 7 | W 7 | — | — | — | W 17 | W 17 |
| kJ | 1 | 1 | — | — | 4 | 3 | — | 2 | — | 2 | — | — | — | — | 1 | 1 | — | — | — | 5 | 6 |
Swell 3 Height (m) Direction Period (s) | W 6 | — | — | — | — | W 6 | SW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | — | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | — | — | — | — | WSW 4 | — | NNW 4 | N 3 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | — | — | — | SW 5 | WSW 6 | NW 4 | NW 4 |
| kJ | 1 | — | — | — | — | 17 | — | 10 | 5 | 17 | 32 | 11 | 29 | 34 | — | — | — | 77 | 176 | 9 | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 185 | 114 | 107 | 129 | 331 | 142 | 142 | 498 | 146 | 535 | 553 | 319 | 353 | 328 | 305 | 309 | 305 | 292 | 713 | 1044 | 142 |
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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