Surf Forecasts:
Fishermans (Rhiw) surf forecast from 29 Aug 2026:
- Most powerful swell: Friday 4 Sep, 4AM (local time) - 8ft (2.5m), 7s period, WSW swell with 724 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 4AM. 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 | 4AM (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 have a look at what’s on the cards for the next couple of weeks.
Right off the bat, I gotta be straight with you – this is a tough outlook. We’re looking at a sixteen-day run where the surf just doesn’t want to play ball. Fishermans (Rhiw) is a reef set-up, fairly exposed to the swell, but the conditions are just relentless. The water’s sitting at a balmy 65°F, which is a solid 4°F warmer than usual for this time of year – feels like a bath, but that’s about the only good news.
We kick off on Saturday, 29th of August. There’s a tiny 2ft SW swell, but it’s got bugger-all period (6 seconds) and only 20 units of energy. The wind is offshore from the NNE, so it’s glassy clean, but the swell is just too weak to do anything with. It’s a flat, clean pond.
Then we hit a nasty stretch. Sunday the 30th through to the end of the first week is a write-off. The wind is mostly onshore – from the south and southwest – and it’s howling. We’ve got rain showers and even a risk of thunderstorms. The swell tries to pick up, hitting 4ft on Sunday afternoon, but the period drops to a shocking 5 seconds and the energy is only moderate (113). That’s a messy, blown-out sea. The wind stays strong and onshore right through the start of September, with gusts up to 28 mph. The swell gets bigger, up to 7ft on Wednesday the 2nd of September, but with a strong breeze onshore, it’s just a washing machine. The combined energy hits 459 (moderate), but it’s a total mess.
The first week of September is a dead loss. The wind is strong, cross-onshore, and the surf is lumpy and choppy. By Friday the 4th, we’ve got a 7ft swell from the west, but the wind is a strong cross-shore, making it impossible. The setup looks more interesting for kite surfing than paddle surfing.
The weekend of the 6th and 7th of September? More of the same – strong winds, rain, and blown-out conditions. The swell is there, but the wind kills it every time.
The second week offers a glimmer of hope, but it’s far off. Thursday the 10th of September sees a light breeze from the SSE, with a 3ft SW swell and a period of 8 seconds. The wind is still cross-onshore, but it’s light, so the bump is small. The energy is moderate (112). It’s not great, but it’s the best we’ll see in a while.
Then, on Saturday the 12th of September, we get a proper pulse. The swell jumps to 7ft from the WSW, with a period of 10 seconds, and the combined energy rockets to 981 (strong). That’s a lot of power. But the wind is still a fresh cross-onshore, so it’s going to be lumpy and messy. It’s a big swell, over 8ft, so it’s strictly for experts only. The period is 10-11 seconds, so it’s a groundswell, but with that onshore wind, it’s a battle.
The very last day, Sunday the 13th of September, the wind finally swings offshore from the NW. The swell is small, only 3ft, but it’s clean. The energy is moderate (120). It’s a clean, small day to end the run.
Honestly, there’s no standout session here. The wind is the enemy for almost the entire forecast. If you’re desperate, the 10th of September might give you a few grovelly ones in the morning, and the 12th is a big, powerful, but messy swell for the brave. The 13th has the cleanest conditions, but the swell is tiny.
Keep an eye on the charts, but don’t hold your breath.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat afternoon. Very mild (max 17°C on Sun morning, min 14°C on Mon morning). Winds increasing (light winds from the WSW on Sat night, strong winds from the NW by Mon morning). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed morning. Very mild (max 18°C on Wed night, min 14°C on Thu night). Mainly strong winds. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 6 | SW 9 | SW 8 | SW 5 | SW 8 | SW 9 | WSW 9 | SW 8 | WSW 4 | SW 5 | SW 5 | SW 6 | SW 7 | SW 7 | WSW 6 | SW 6 | WSW 7 | W 6 | W 6 | SW 6 |
Wave Graph | ||||||||||||||||||||
18 | 141 | 118 | 94 | 104 | 155 | 138 | 62 | 32 | 49 | 53 | 275 | 459 | 407 | 170 | 230 | 705 | 389 | 166 | 31 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | on | on | cross | cross-off | cross | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on |
High Tide | 10:01PM4.26m | 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 | |||||||
Low Tide | 4:32PM0.27m | 4:59AM0.12m | 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 | |||||||
— | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | |
8:15 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | |
mm | 4 | — | 2 | 3 | 3 | — | — | — | — | — | 2 | 4 | — | — | — | — | 1 | — | — | — |
Temp °C | 16 | 16 | 17 | 16 | 16 | 14 | 16 | 17 | 16 | 16 | 17 | 17 | 17 | 18 | 16 | 17 | 15 | 15 | 17 | 17 |
Feels °C | 14 | 15 | 13 | 11 | 13 | 6 | 12 | 14 | 11 | 11 | 12 | 11 | 11 | 13 | 9 | 10 | 7 | 9 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 9 | — | SW 9 | SW 8 | SW 9 | WSW 9 | NNW 4 | — | — | W 16 | — | — | — | — | — | — | — | — | SW 6 |
18 | 141 | — | 19 | 104 | 155 | 138 | 4 | — | — | 5 | — | — | — | — | — | — | — | — | 31 | |
Swell 2 Height (m) Direction Period (s) | SE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 7 |
2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 25 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | |
Wind waves Height (m) Direction Period (s) | — | NW 4 | SW 8 | SW 5 | — | NW 6 | NW 5 | SW 8 | WSW 4 | SW 5 | SW 5 | SW 6 | SW 7 | SW 7 | WSW 6 | SW 6 | WSW 7 | W 6 | W 6 | NW 5 |
— | 3 | 118 | 94 | — | 155 | 40 | 62 | 32 | 49 | 53 | 275 | 459 | 407 | 170 | 230 | 705 | 389 | 166 | 50 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 129 | 7 | 312 | 305 | 7 | 498 | 7 | 7 | 255 | 255 | 278 | 977 | 297 | 317 | 743 | 498 | 498 | 560 | 123 | 7 |
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.











