Surf Forecasts:
Fishermans (Rhiw) surf forecast from 17 Jul 2026:
- Most powerful swell: Friday 17 Jul, 10PM (local time) - 0.5ft (0.1m), 13s period, SW swell with 6 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 0.1m 13s and forecast to arrive on Friday (Jul 17) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Jul 18) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 17th Jul) | 0.5ft (0.1m) 13s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this forecast for Fishermans (Rhiw) is a tough one. We’ve got a proper flat spell to sit through before any real hope shows up. Don’t bother paddling out for the first 12 days, because from the 17th of July right through to the 28th, it’s basically a desert. There’s nothing but tiny dribbles of 0.3ft to 2ft swell with poor energy, and the wind is mostly cross-off, which won’t do a thing for waves that aren't there. You’d be floating on a lake.
The only flicker of life comes right at the end of the month. On the morning of the 29th of July, we finally see some direction with a 5ft swell from the SW, period around 6 seconds, and a clean offshore wind from the NNE. The water temperature is sitting at 64°, which is a notable 5°F warmer than usual for this time of year – that’s a very clear sign the sea is feeling more like summer than it should. The wave energy is moderate (141), and while it’s not epic, it’s surfable. The real standout, though, is the afternoon of the 29th. The swell bumps up to 6ft from the WSW, period still short at 7 seconds, but the energy climbs to 286 and the offshore wind from the N stays clean. That’s your best window – a genuine opportunity for a few fun ones.
The next morning, the 30th of July, brings a bigger 7ft swell from the NW with a 7-second period. That’s pushing into expert territory for size, and the energy is strong at 572. The wind is offshore from the NE, so it’ll be clean, but at that size, if you’re not confident on a reef, it’s a day to watch. After that, it drops off fast into the 31st and into August with onshore winds and weak dribble again.
So, to sum it up: the only real window to get wet is the 29th and maybe the morning of the 30th of July. The 29th afternoon is the pick of the lot – steady head-high waves, clean offshore breeze, and manageable energy. The rest is a waiting game. Don’t hold your breath for the first week and a half.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Fri afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the NNW on Sat afternoon, calm by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Mon afternoon, min 13°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 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) | W 12 | SW 12 | SW 13 | SW 6 | S 5 | SW 11 | NNW 4 | NW 3 | N 3 | N 5 | NNW 4 | N 4 | NNW 5 | NNW 4 | W 16 | NNW 5 | NNW 4 | NNW 6 | NNW 5 | NW 4 | NW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 6 | 6 | 1 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 1 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off |
High Tide | 11:05AM3.88m | 11:24PM4.39m | 11:50AM3.73m | 00:09AM4.20m | 12:36PM3.54m | 00:55AM3.91m | 1:23PM3.32m | 1:44AM3.57m | 2:14PM3.10m | 2:38AM3.23m | 3:13PM2.92m | 3:43AM2.96m | 4:24PM2.82m | ||||||||
Low Tide | 5:59PM0.24m | 6:35AM0.04m | 6:41PM0.39m | 7:19AM0.27m | 7:23PM0.61m | 8:02AM0.55m | 8:07PM0.85m | 8:45AM0.85m | 8:54PM1.09m | 9:33AM1.12m | 9:52PM1.30m | 10:33AM1.32m | 11:08PM1.41m | ||||||||
 |  |  | | |  | | | | | | | | | | |  | | | | | |
 | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — | 5:22 | — | — |
 | — | — | 9:34 | — | — | 9:32 | — | — | 9:30 | — | — | 9:30 | — | — | 9:29 | — | — | 9:28 | — | — | 9:25 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 18 | 14 | 17 | 18 | 16 | 17 | 16 | 14 | 18 | 17 | 15 | 17 | 16 | 14 | 15 | 16 | 16 | 20 | 19 |
Feels °C | 13 | 13 | 13 | 8 | 12 | 15 | 13 | 12 | 11 | 10 | 13 | 13 | 12 | 14 | 13 | 9 | 12 | 13 | 15 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | S 5 | NNW 5 | NNW 4 | — | — | — | — | NW 4 | NNW 5 | — | W 16 | — | — | NNW 6 | NNW 5 | — | NW 4 |
| kJ | 2 | 1 | 1 | 1 | 1 | 14 | 4 | — | — | — | — | 3 | 3 | — | 5 | — | — | 3 | 11 | — | 1 |
Swell 2 Height (m) Direction Period (s) | W 12 | SW 12 | SW 13 | — | — | SW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 3 | 6 | 6 | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNW 4 | N 3 | NNW 4 | NNW 5 | ENE 3 | — | NW 3 | N 3 | N 5 | NNW 4 | N 4 | NNW 5 | NNW 4 | N 4 | NNW 5 | NNW 4 | NNW 6 | — | NW 4 | — |
| kJ | 1 | 17 | 6 | 17 | 69 | 1 | — | 2 | 6 | 13 | 24 | 12 | 15 | 24 | 14 | 64 | 46 | 37 | — | 5 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 303 | 639 | 319 | 321 | 321 | 321 | 321 | 306 | 305 | 320 | 371 | 305 | 251 | 297 | 322 | 614 | 321 | 80 | 256 | 308 | 305 |
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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