Surf Forecasts:
Fishermans (Rhiw) surf forecast from 2 Sep 2026:
- Most powerful swell: Wednesday 2 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 335 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 Wednesday (Sep 02) 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 0.9m 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 | 10PM (Wed 2nd 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 have a look at what’s cookin’ for the next couple of weeks.
To be honest, straight out of the gate, it’s a bit of a rough start. We’ve got a long stretch of poor conditions ahead. The first real glimmer of anything worthwhile doesn’t show up until Monday the 7th of September, and even then it’s marginal. The opening days are ruled by strong onshore and cross-onshore winds, choppy messy surf, and weak, short-period swell. Not a lot to get excited about.
Let’s talk about the water first. At Fishermans (Rhiw), the water temperature is sitting at 64°F with a positive anomaly of 3°F, so it’s a touch warmer than usual for this time of year. That’s a nice little bonus if you’re suiting up.
The first bit of hope comes on Monday the 7th of September. The morning has a clean, cross-off wind, and while the swell is only 3 ft from the WSW, the period jumps to a very long 14 seconds. That’s proper groundswell energy. The combined energy is moderate (296). The catch is the forecast is marginal, and the break is a reef that’s fairly exposed to the SW and rarely breaks. This is a spot that needs a lot of things to line up, so this is a very delicate, promising but not guaranteed window. The wind is light, so it’ll be clean, but the size is small.
After that, we get a few more days of rough weather and onshore winds, but the outlook improves again heading into the second week. The standout to circle on your calendar is Monday the 14th of September. The morning session shows a 5 ft swell from the SW, with a period of 9 seconds, and clean, cross-off winds from the east. The combined energy is strong (343). The forecast says “expect good surf conditions.” This is the best window we’ve got. The swell direction matches the optimum SW direction, and the conditions are clean. The only thing to keep in mind is that the spot is a reef, so if the swell pushes over 7 ft, it becomes an expert-only affair. At 5 ft, it’s still accessible for confident intermediates. The wind is light, so the surface will be smooth.
The rest of the period is mostly small and average, with the occasional clean morning but very little power. From the 11th onwards, we see some clean cross-off mornings, but the swell is tiny and weak. It’s not a total write-off, but you’ll be chasing knee-high dribble.
So, to sum it up: the best bet is Monday the 14th of September morning. The other possible window is the marginal, long-period groundswell on Monday the 7th, but that’s a real gamble. The rest of the time, it’s either too windy, too small, or too messy to bother.
Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Wed morning. Very mild (max 18°C on Wed night, min 14°C on Fri morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 13°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 5 | WSW 5 | W 5 | SW 5 | SW 6 | SW 6 | SW 4 | SSW 4 | SW 5 | WSW 14 | SW 5 | WSW 5 | WSW 7 | SW 4 | WSW 4 |
Wave Graph | |||||||||||||||||||||
80 | 172 | 314 | 139 | 133 | 198 | 80 | 91 | 100 | 28 | 16 | 11 | 7 | 13 | 30 | 37 | 91 | 100 | 57 | 15 | 24 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | on | cross | on | cross-on | cross | on | cross-off |
High Tide | 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 | 5:28AM2.98m | 6:01PM3.28m | 6:41AM3.22m | 7:03PM3.65m | ||||||||
Low Tide | 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 | 12:42PM1.09m | 1:21AM0.71m | 1:43PM0.77m | 2:16AM0.35m | |||||||
6:28 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | |
— | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:59 | — | — | 7:55 | — | — | 7:53 | — | — | 7:51 | — | |
mm | 7 | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 1 |
Temp °C | 17 | 17 | 18 | 17 | 17 | 16 | 15 | 17 | 16 | 13 | 14 | 14 | 17 | 20 | 18 | 14 | 16 | 16 | 14 | 15 | 15 |
Feels °C | 11 | 13 | 13 | 13 | 12 | 11 | 8 | 11 | 10 | 10 | 11 | 11 | 12 | 15 | 14 | 12 | 11 | 9 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 16 | — | — | — | — | SW 14 | SW 15 | — | SW 14 | SW 5 | SW 6 | NW 4 | SW 4 | SW 13 | W 16 | SW 5 | — | WSW 12 | NW 4 | NW 4 | SW 6 |
5 | — | — | — | — | 8 | 8 | — | 8 | 28 | 16 | 1 | 4 | 6 | 5 | 22 | — | 26 | 7 | 3 | 2 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 14 | NW 4 | SW 13 | SW 6 | W 8 | SW 12 | WSW 14 | — | — | WSW 10 | — | WSW 9 |
— | — | — | — | — | — | — | — | — | 7 | 7 | 7 | 2 | 1 | 6 | 37 | — | — | 19 | — | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 5 | WSW 5 | W 5 | NW 5 | — | SW 6 | SSE 3 | SSW 4 | SW 5 | WSW 4 | SW 5 | WSW 5 | WSW 7 | SW 4 | WSW 4 |
80 | 172 | 314 | 139 | 133 | 198 | 80 | 91 | 100 | 25 | — | 11 | 1 | 13 | 30 | 12 | 91 | 100 | 57 | 15 | 24 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 295 | 297 | 269 | 255 | 453 | 137 | 129 | 477 | 129 | 142 | 275 | 114 | 232 | 139 | 228 | 7 | 306 | 276 | 7 | 184 | 129 |
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.











