Surf Forecasts:
Fishermans (Rhiw) surf forecast from 30 Aug 2026:
- Most powerful swell: Friday 4 Sep, 7AM (local time) - 8ft (2.5m), 7s period, WSW swell with 705 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 2.5m 7s and forecast to arrive on Friday (Sep 04) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Monday (Aug 31) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 4th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down the surf in Fishermans (Rhiw) for the next couple weeks.
It’s a rough start. We’ve got a big gap of nothing good to begin with, and the only potential shows up way late in the game. The water temperature is 65°, which is much warmer than usual for this time of year—about 4° above average, so you’ll be fine in just a spring suit.
First real bit of swell rolls in on Wednesday, 2nd September, but it’s a mess. We’re looking at a 7ft southwest swell with a short 7-second period, and the wind is smashing onshore from the southwest at 28 mph. The combined energy is moderate (347), but the conditions are flat-out poor. That’s a day for the kiteboarders, not a surfboard.
Thursday, 3rd September, is similar—5ft to 6ft of windblown southwest swell, again onshore. Not inviting.
Friday, 4th September, brings the biggest swell of the outlook: 8ft from the west-southwest, but with cross-onshore winds at 28 mph. The energy jumps to 657, but it’s powerful, messy, and dangerous—experts only, and even then it’s a fight. Best left alone.
Then we hit another flat spell. From Saturday, 5th September, all the way through Monday, 14th September, the swell drops to tiny—mostly under 2ft. Lots of glassy, flat days. The 8th of September afternoon goes completely glassy with 1ft swell, but there’s no power.
The one real highlight? It’s a long way out, but Friday, 11th September morning is the pick. You’ve got a clean 2ft southwest swell with a 7-second period and a light offshore breeze from the northeast at 6 mph. Combined energy is weak (34), but the setup is clean, small, and offshore. Fishermans (Rhiw) is a reef break, so it’ll handle that small swell well. The crowd factor is "sometimes," so you might have it to yourself. It’s the only truly clean, fun window in the whole 16 days.
Saturday, 12th September morning also offers a tiny 2ft from the east-southeast, clean and offshore. It’s small but rideable.
So, bottom line: a lot of windy, messy days and flat spells. But if you’re waiting for the best, the morning of the 11th is your window. Everything else is a miss.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sun morning. Very mild (max 17°C on Sun morning, min 14°C on Mon morning). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu night. Very mild (max 18°C on Wed night, min 14°C on Thu night). Mainly strong winds. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 8 | SW 6 | SW 8 | WSW 9 | SW 9 | SW 8 | SW 5 | SW 5 | SW 5 | SW 7 | SW 6 | SW 7 | SW 5 | SW 6 | WSW 7 | WSW 7 | WSW 6 | WNW 6 | SW 6 | SW 6 | SW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 118 | 110 | 125 | 129 | 118 | 65 | 53 | 96 | 100 | 347 | 273 | 314 | 119 | 221 | 385 | 657 | 350 | 167 | 32 | 18 | 19 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross-off | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | cross-on |
High Tide | 10:18AM3.93m | 10:34PM4.30m | 10:52AM3.97m | 11:09PM4.25m | 11:28AM3.91m | 11:47PM4.09m | 12:08PM3.76m | 00:30AM3.83m | 12:53PM3.53m | 1:20AM3.49m | 1:48PM3.26m | 2:25AM3.15m | 3:02PM3.03m | 3:52AM2.93m | |||||||
Low Tide | 5:04PM0.26m | 5:32AM0.17m | 5:38PM0.34m | 6:05AM0.31m | 6:13PM0.48m | 6:41AM0.53m | 6:51PM0.67m | 7:22AM0.79m | 7:39PM0.91m | 8:16AM1.08m | 8:50PM1.14m | 9:38AM1.30m | 10:31PM1.24m | ||||||||
 | |  |  | |  |  |  |  |  | | | |  | | | | | | | | |
 | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — |
mm | 2 | 3 | 3 | — | — | — | — | — | 3 | 1 | — | — | — | 1 | 6 | — | 1 | — | — | — | — |
Temp °C | 17 | 17 | 16 | 15 | 16 | 17 | 16 | 16 | 16 | 17 | 17 | 18 | 16 | 17 | 15 | 16 | 17 | 15 | 13 | 14 | 14 |
Feels °C | 13 | 12 | 13 | 9 | 13 | 14 | 11 | 11 | 11 | 11 | 11 | 14 | 12 | 11 | 10 | 9 | 10 | 8 | 10 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | — | WSW 8 | SW 8 | WSW 9 | SW 9 | NW 4 | — | — | W 16 | — | — | — | — | — | — | — | — | SW 14 | SW 6 | NW 5 | NW 4 |
| kJ | — | 7 | 125 | 129 | 118 | 5 | — | — | 5 | — | — | — | — | — | — | — | — | 8 | 32 | 12 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | NNW 5 | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 6 | SW 13 |
| kJ | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 18 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — |
Wind waves Height (m) Direction Period (s) | SW 8 | SW 6 | — | NW 6 | NW 5 | SW 8 | SW 5 | SW 5 | SW 5 | SW 7 | SW 6 | SW 7 | SW 5 | SW 6 | WSW 7 | WSW 7 | WSW 6 | WNW 6 | NW 5 | — | SW 4 |
| kJ | 118 | 110 | — | 167 | 49 | 65 | 53 | 96 | 100 | 347 | 273 | 314 | 119 | 221 | 385 | 657 | 350 | 167 | 41 | — | 19 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 312 | 305 | 7 | 257 | 7 | 7 | 255 | 297 | 255 | 305 | 556 | 257 | 255 | 255 | 325 | 497 | 498 | 296 | 142 | 285 | 134 |
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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