Surf Forecasts:
Fishermans (Rhiw) surf forecast from 3 Sep 2026:
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 3.5ft (1.1m), 13s period, WSW swell with 414 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 1.1m 13s and forecast to arrive on Monday (Sep 07) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s 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 | 1PM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at the upcoming swell window for Fishermans (Rhiw).
Honestly, the next two weeks are a tough watch. There’s flat spells, messy wind, and a lot of “poor surf conditions” in the cards. The real problem is the wind: it’s relentless from the west and southwest, and that’s just the worst direction for this reef. The water is sitting at 63°F, which is a touch warmer than normal for the beginning of September – not a bad thing for the early sessions, but the swell isn’t making it worthwhile.
The only real glimmer comes on Sunday, the 13th of September. That afternoon we’re looking at a clean 7ft SW groundswell rolling in, combined with a light NW breeze going cross-offshore. That’s the standout. The combined energy is moderate at 347, and for a reef, that long-period pulse will draw up nicely. The crowds can be an issue at this place when it’s good, so get in early. That morning looks glassy but smaller at 5ft, so the afternoon is your window. The Monday morning following is clean but much smaller, so don’t stretch the session. Other than that, there are long gaps. The first week is all blown out or too small, with a solid five or six days of no real recommendation until that Sunday.
The short period on most swells means they’ll be weak and crumbly, and with the onshore, it’s barely worth paddling out. There’s a bit of knee-high glass on Saturday the 12th, but it’s not enough to get excited about. Late in the period, the swell fades right off to nothing. All in all, keep your eyes on that Sunday afternoon and be ready to go, because the rest of the 16 days is largely a write-off.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Very mild (max 17°C on Thu morning, min 14°C on Fri morning). Winds decreasing (strong winds from the SW on Thu night, light winds from the W by Sat morning). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Mon night. Warm (max 21°C on Sun afternoon, min 13°C on Mon night). Mainly strong winds. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 7 | SW 6 | SW 6 | WSW 8 | WSW 6 | W 5 | SW 6 | SW 6 | SW 4 | SW 5 | SSW 6 | SW 6 | WSW 5 | SW 5 | WSW 7 | W 6 | W 6 | W 6 | W 5 | SW 5 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 171 | 155 | 167 | 318 | 143 | 120 | 39 | 28 | 9 | 24 | 77 | 137 | 99 | 106 | 189 | 154 | 141 | 197 | 97 | 51 | 312 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | on | cross | on | cross-on | cross | cross | cross | cross-on | on | cross-on |
High Tide | 12:53PM3.53m | 1:20AM3.49m | 1:48PM3.26m | 2:25AM3.15m | 3:02PM3.03m | 3:52AM2.93m | 4:36PM3.02m | 5:28AM2.98m | 6:01PM3.28m | 6:41AM3.22m | 7:03PM3.65m | 7:36AM3.52m | 7:53PM4.02m | ||||||||
Low Tide | 7:39PM0.91m | 8:16AM1.08m | 8:50PM1.14m | 9:38AM1.30m | 10:31PM1.24m | 11:19AM1.31m | 00:09AM1.06m | 12:42PM1.09m | 1:21AM0.71m | 1:43PM0.77m | 2:16AM0.35m | 2:31PM0.47m | 3:02AM0.05m | ||||||||
 | |  | |  |  |  | |  | | |  | |  |  | | | | | |  | |
 | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — |
 | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | — | 7:49 | — |
mm | — | — | 10 | — | — | — | — | — | — | — | — | — | — | 1 | 9 | — | — | — | — | — | 3 |
Temp °C | 17 | 17 | 17 | 15 | 17 | 16 | 14 | 15 | 15 | 18 | 21 | 17 | 15 | 15 | 15 | 14 | 15 | 15 | 14 | 15 | 17 |
Feels °C | 13 | 12 | 11 | 8 | 11 | 9 | 13 | 12 | 11 | 12 | 17 | 13 | 11 | 9 | 10 | 6 | 9 | 8 | 9 | 9 | 12 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 14 | — | NW 5 | SW 14 | SW 6 | NW 4 | SW 4 | SW 5 | SW 13 | — | WSW 13 | — | — | — | — | — | — | NW 5 | — |
| kJ | — | — | 8 | — | 16 | 8 | 39 | 5 | 9 | 24 | 6 | — | 99 | — | — | — | — | — | — | 12 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 5 | SW 13 | WSW 6 | SW 13 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 15 | 7 | 4 | 7 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 14 | SW 13 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 7 | 7 | 7 | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 6 | SW 6 | WSW 8 | WSW 6 | W 5 | — | SW 6 | SSE 3 | SSE 3 | SSW 6 | SW 6 | WSW 5 | SW 5 | WSW 7 | W 6 | W 6 | W 6 | W 5 | SW 5 | SW 7 |
| kJ | 171 | 155 | 167 | 318 | 143 | 120 | — | 28 | 2 | 7 | 77 | 137 | 78 | 106 | 189 | 154 | 141 | 197 | 97 | 51 | 312 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 255 | 320 | 7 | 259 | 497 | 129 | 7 | 255 | 129 | 188 | 139 | 232 | 7 | 339 | 123 | 498 | 464 | 129 | 297 | 255 | 96 |
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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