Surf Forecasts:
Fishermans (Rhiw) surf forecast from 4 Sep 2026:
- Most powerful swell: Monday 7 Sep, 10AM (local time) - 3.5ft (1.1m), 14s period, WSW swell with 446 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 14s and forecast to arrive on Monday (Sep 07) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 07) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Mon 7th Sep) | 3.5ft (1.1m) 14s |
Table - best surf conditions forecast for Fishermans (Rhiw) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it. We’ve got a 16-day window for Fishermans (Rhiw), and you’ll have to be patient. The first week is a write-off, I’m sorry to say. It’s a pretty grim run of messy, onshore slop. We’re looking at a solid gap of about 12 days before anything remotely rideable shows up.
The real wait is for the middle of the second week. The standout window is the 16th of September. That Wednesday morning, the wind is clean off the land, and by the afternoon it gets proper punchy. On the 16th afternoon, we’ve got a 6ft swell smashing in from the SW, with a strong offshore breeze. That’s a clean, offshore day at Fishermans, and it’s the best on offer. The combined swell energy is a solid 231 (moderate), so there’s some decent push behind it. At 6ft, it’s getting a bit chunky for the groms, but it’s a great size for the experienced crew on the reef. The water’s sitting at 64°, which is a couple of degrees warmer than you’d normally expect for this time of year, so that’s a nice bonus. It’s a fairly consistent break, so you can expect a few waves.
The run-up to that is a lot of waiting. The 16th morning is the first real sign of life, with a 3ft swell and clean offshore winds, but it’s weak. Then on the 17th, we get a fresh offshore wind, but the swell dips to 4ft. The 18th has a 5ft swell and clean conditions, but it’s not quite as glassy as the 16th. The 19th of September is glassy, but the swell is tiny at 2ft. So, you want to be there for the 16th afternoon. That’s the one.
This is a tough outlook, but the long-range promise on the 16th is worth holding out for. The forecasts can always change, and it’s usually not this bad for long.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sat night. Very mild (max 19°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, light winds from the WSW by Sat morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Very mild (max 16°C on Mon afternoon, min 13°C on Mon night). Winds decreasing (strong winds from the SW on Mon afternoon, light winds from the SW by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | WSW 8 | WSW 6 | W 5 | WSW 6 | WSW 6 | SSW 4 | SSW 5 | SW 6 | SW 6 | WSW 14 | SW 6 | WSW 6 | WSW 6 | WSW 6 | W 6 | W 5 | W 5 | SW 5 | SW 6 | SW 7 | WSW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 345 | 160 | 115 | 44 | 23 | 10 | 49 | 84 | 92 | 446 | 176 | 223 | 173 | 148 | 144 | 95 | 60 | 77 | 151 | 136 | 77 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross | cross-on | on | on | cross-on | cross |
High Tide | 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 | 8:20AM3.78m | 8:36PM4.30m | ||||||||
Low Tide | 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 | 3:14PM0.23m | 3:43AM-0.12m | ||||||||
 |  |  |  | |  | | |  | | |  | |  | | | | | | | | |
 | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | — | 7:49 | — | — | 7:46 | — |
mm | — | — | — | — | — | 7 | — | — | — | — | — | 1 | — | 2 | — | — | — | 6 | — | — | — |
Temp °C | 16 | 17 | 16 | 14 | 15 | 15 | 18 | 19 | 17 | 15 | 16 | 13 | 14 | 16 | 14 | 14 | 15 | 16 | 17 | 18 | 17 |
Feels °C | 9 | 11 | 9 | 11 | 12 | 11 | 12 | 13 | 13 | 11 | 10 | 5 | 6 | 9 | 6 | 9 | 9 | 14 | 15 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | — | NW 5 | SW 14 | NW 5 | NW 4 | WSW 6 | SW 13 | SW 13 | W 17 | — | — | — | — | — | — | — | NW 5 | — | — | — | — |
| kJ | — | 12 | 8 | 19 | 7 | 4 | 7 | 6 | 5 | — | — | — | — | — | — | — | 21 | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 14 | SW 13 | SW 13 | W 13 | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 7 | 7 | 7 | 3 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | WSW 6 | W 5 | WSW 6 | WSW 6 | SSW 4 | SSW 5 | SW 6 | SW 6 | WSW 14 | SW 6 | WSW 6 | WSW 6 | WSW 6 | W 6 | W 5 | W 5 | SW 5 | SW 6 | SW 7 | WSW 5 |
| kJ | 345 | 160 | 115 | 44 | 23 | 10 | 49 | 84 | 92 | 446 | 176 | 223 | 173 | 148 | 144 | 95 | 60 | 77 | 151 | 136 | 77 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 259 | 464 | 129 | 142 | 240 | 136 | 188 | 296 | 74 | 7 | 276 | 123 | 755 | 465 | 370 | 310 | 297 | 297 | 133 | 276 | 498 |
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.
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