Surf Forecasts:
Fishermans (Rhiw) surf forecast from 31 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 332 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 7s and forecast to arrive on Thursday (Sep 03) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Saturday (Sep 05) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Thu 3rd Sep) | 6ft (1.9m) 7s |
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: the next 16 days at Fishermans (Rhiw) are a proper write-off for surf. I’ve been staring at this stretch and it’s a long, bleak run. There’s not a single good session on the cards.
The water is sitting at 64°F – that’s much warmer than normal for this time of year, about 4°F above average, which is a real treat for the skin, but there’s no wave quality to enjoy it with.
We kick off Monday the 31st of August with a weak 3ft SW swell and a cross-offshore wind out of the NW at 35 km/h, which keeps the surface clean. The combined energy is only 142 – that’s weak. But the surfing is labelled poor, and the wind is a fresh breeze, so it’s not doing you any favours. By the afternoon, the wind swings to the west, 20 km/h, and goes cross shore, making it choppy.
Tuesday the 1st of September, the swell drops to 3ft, period plummets to 4 seconds – that’s pure wind-chop, no energy at all (16). The wind is onshore and strong from the SW at 25 km/h. It’s just no good.
Wednesday the 2nd sees a slight bump to 5ft, but that’s a 5-second period, and the wind is howling onshore from the S at 30 km/h. The energy kicks up to 99, still weak, but the conditions are messy. By the afternoon we’re at 5ft with 6-second period and 35 km/h onshore wind. Total washout.
The same story runs through Thursday and Friday the 3rd and 4th – 5ft to 6ft of SW swell, but the wind is a strong breeze, cross-onshore, 40 km/h, making it cross-onshore and messy. Energy climbs to 281, but it’s all for nothing.
Saturday the 5th, the swell drops right back to 3ft, and Sunday the 6th it’s 2ft with 4-second period and onshore wind. There’s basically nothing.
There’s a faint glimmer Monday the 7th of September morning: a 4ft SW swell with a cross-offshore NW wind at 20 km/h, keeping it clean. Energy is 84 – weak. But it’s still labelled poor surf. Not enough to bother with.
From the 8th through the 13th, it’s a desert. Tiny swells, onshore winds, and periods of 4 to 6 seconds. The energy readings are pitiful – mostly below 100. The 13th sees a 3ft SSE swell, but again, 4-second period and onshore wind.
Then the swell tries to build again on the 14th of September. Monday morning: 5ft from the SW, 8-second period, energy jumps to 297 – that’s moderate. But the wind is a fresh 30 km/h cross-onshore, making it lumpy. By the 15th, we’re looking at 8ft from the WSW with 8-second period and a near gale of 50 km/h cross-onshore wind. That’s 716 energy – strong – but it’s blown out. Only experts would even consider it, and even then, it’d be a mess.
The whole 16-day window is a bust. No standouts, no sessions worth the paddle. Sometimes the ocean just shuts down like this. Forecasts can change, but right now, I’d leave the board in the van.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Wed morning. Very mild (max 17°C on Mon afternoon, min 15°C on Mon morning). Winds increasing (light winds from the W on Mon afternoon, strong winds from the SSW by Wed morning). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu morning, min 14°C on Fri morning). Winds decreasing (strong winds from the WSW on Fri morning, light winds from the WSW by Sat afternoon). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 | WSW 9 | WSW 8 | SW 4 | SW 5 | WSW 5 | SW 5 | SW 6 | SW 7 | SW 6 | SW 6 | SW 7 | WSW 6 | WSW 6 | W 6 | WSW 6 | WSW 6 | SW 6 | SSW 4 | SW 4 | SW 5 |
Wave Graph | |||||||||||||||||||||
142 | 141 | 43 | 16 | 35 | 31 | 94 | 184 | 253 | 169 | 219 | 183 | 281 | 271 | 199 | 44 | 24 | 15 | 9 | 18 | 40 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | on | on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | on | on | on | on |
High Tide | 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 | 4:36PM3.02m | ||||||||
Low Tide | 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 | 11:19AM1.31m | 00:09AM1.06m | ||||||||
6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | |
— | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | |
mm | — | — | — | — | 1 | 4 | 7 | — | — | 1 | 2 | 4 | — | — | — | — | — | — | — | — | 1 |
Temp °C | 15 | 17 | 17 | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 17 | 17 | 15 | 17 | 16 | 14 | 15 | 15 | 15 | 16 | 17 |
Feels °C | 9 | 14 | 13 | 12 | 11 | 15 | 11 | 12 | 12 | 15 | 11 | 12 | 7 | 10 | 9 | 9 | 13 | 13 | 9 | 11 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 8 | WSW 9 | WSW 8 | — | — | W 16 | W 16 | — | — | — | — | — | — | — | — | WSW 6 | NW 5 | NNW 4 | SW 6 | SW 13 | W 12 |
142 | 141 | 43 | — | — | 5 | 5 | — | — | — | — | — | — | — | — | 44 | 21 | 2 | 1 | 6 | 3 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | WSW 6 | SW 13 | SW 13 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 24 | 7 | 7 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | W 13 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 3 | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 5 | NW 5 | NW 4 | SW 4 | SW 5 | WSW 5 | SW 5 | SW 6 | SW 7 | SW 6 | SW 6 | SW 7 | WSW 6 | WSW 6 | W 6 | NW 6 | NW 4 | SW 6 | SSW 4 | SW 4 | SW 5 |
100 | 24 | 4 | 16 | 35 | 31 | 94 | 184 | 253 | 169 | 219 | 183 | 281 | 271 | 199 | 76 | 4 | 15 | 9 | 18 | 40 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 498 | 7 | 7 | 240 | 297 | 232 | 305 | 330 | 269 | 269 | 317 | 269 | 431 | 498 | 464 | 137 | 7 | 129 | 188 | 282 | 257 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











