Surf Forecasts:
Kerhillio surf forecast from 25 Aug 2026:
- Best quality surf: Sunday 30 Aug, 5AM (local time) - 5.5ft (1.7m), 8s period, WSW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 8PM (local time) - 8ft (2.5m), 9s period, W swell with 943 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 5PM (local time) - 2.5ft (0.7m), 6s period with SSW swell.
Best Forecast Surf Conditions for Kerhillio this week:
The surf forecast for Kerhillio over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 26) at 5PM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.3m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kerhillio in the next 16 days are 2.5m 9s and forecast to arrive on Friday (Aug 28) at 8PM. 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 Wednesday (Aug 26) at 5PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Wed 26th Aug) | 2.5ft (0.7m) 6s |
| Best Surf | 5AM (Sun 30th Aug) | 5.5ft (1.7m) 8s |
| Most Powerful | 8PM (Fri 28th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Kerhillio over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a long, hard look at what Kerhillio's got cookin' for us over the next couple of weeks. I gotta be straight with you, it's a bit of a tough stretch. The swell is there, but the wind is gonna be the main character in this story, and it's not always a friendly one.
The pattern for the next 16 days is dominated by a lot of onshore and cross-onshore wind, which is gonna mess up what could otherwise be some decent-sized waves. We're seeing moderate combined swell energy for much of the period, but it's almost always accompanied by a chop that'll have you working twice as hard for a so-so ride.
Starting off on Tuesday the 25th and Wednesday the 26th, we've got tiny, weak surf. The combined energy is a measly 34 and 51, with small 1 ft to 2 ft waves from the southwest. The wind is on it or cross-onshore, so it's a bit of a write-off for a real surf session. Wednesday afternoon sees a brief window with a light E wind that's cross-off, cleaning things up for what are described as "surfable waves but very ordinary conditions". It's a one out of ten, so don't get too excited.
Thursday the 27th and Friday the 28th see a jump in size. The swell builds to 3 ft and then 8 ft from the WSW, with the combined energy climbing into the moderate range, hitting 196 and then a whopping 893 on Friday afternoon. But here’s the kicker: the wind is hammering it onshore or cross-onshore, from the SW and W at 16 to 22 mph. That 8 ft on Friday afternoon is going to be a lumpy, choppy mess, and frankly, at that size with that wind, this is more of a kite-surfing setup than a paddle-surfing one. Not for beginners, and even experts will be grumbling.
We go into the weekend of the 29th and 30th with that strong SW wind still blowing, keeping conditions ragged. The swell is still chunky, around 7 ft to 7 ft on Saturday, with combined energy in the 463 to 514 range, but it's all blown out.
There's a little glimmer on Sunday the 30th morning. The swell drops to a manageable 4 ft from the WSW, and the wind goes almost glassy at just 3 mph from the SW, but it's still onshore. The notes call it "marginal", so it's a gamble. After that, the wind picks right back up.
The first week of September is a repeating story: moderate swell, 4 ft to 5 ft from the W, with moderate combined swell energy (263 to 812), but almost always with a cross-onshore wind from the WSW or W. There are a couple of "marginal" calls on the 2nd of September with a 5 ft W swell (10-second period) and lighter WSW wind, but that cross-onshore component is still there. This is a solid 10-second groundswell period, which would normally mean better shaped waves, but the wind will be chopping them up.
Now, if you're looking for the absolute best on offer in this whole outlook, you have to wait until Monday the 7th of September afternoon. We get a 5 ft W swell with a moderate combined swell energy of 821, and crucially, the wind swings around to a cross-offshore from the N at 16 mph. The guidance calls that "clean". This is the standout window. It's the only time we get a solid, clean forecast. The swell is over 5 ft, so it's a bit punchy for beginners, but for the rest of you, that's your session.
Then on Tuesday the 8th of September morning, we get another clean window, but the swell has dropped significantly to 3 ft from the W with a long 10-second period, with a light cross-offshore SE wind. Combined energy is only 177, so it's weak, but it'll be clean and small.
The very end of the forecast, on the 9th of September, shows a 4 ft swell with a very long 13-second period from the W, and a combined energy of 568. But, as per the pattern, it's lumped up by a fresh cross-onshore wind. That long period groundswell would be a dream at a point break or reef, but with that onshore wind at Kerhillio, it's going to be a bumpy ride.
So, there you have it. A lot of windy, average days, but if you're patient, the afternoon of the 7th of September is your best bet by a long shot. It's the only real standout in the bunch. Keep an eye on it.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Wed night. Warm (max 22°C on Wed night, min 17°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Fri afternoon. Warm (max 20°C on Sun afternoon, min 17°C on Fri morning). Winds decreasing (fresh winds from the SW on Fri afternoon, calm by Sat night). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 | SW 8 | W 10 | SW 6 | SSW 6 | SW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 6 | WSW 8 | WSW 8 | WSW 7 | WSW 8 | WSW 8 | WSW 7 | W 10 | WSW 6 | W 8 | W 8 | W 10 |
Wave Graph | |||||||||||||||||||||
24 | 16 | 17 | 37 | 35 | 28 | 136 | 173 | 128 | 143 | 893 | 406 | 463 | 514 | 362 | 169 | 115 | 237 | 302 | 283 | 268 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-off | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | cross | cross-on | cross-on |
High Tide | 4:24PM3.62m | 4:44AM3.56m | 4:56PM3.89m | 5:13AM3.80m | 5:25PM4.13m | 5:42AM3.99m | 5:55PM4.31m | 6:12AM4.14m | 6:25PM4.42m | 6:42AM4.22m | 6:56PM4.44m | 7:13AM4.24m | 7:29PM4.37m | ||||||||
Low Tide | 9:59AM1.05m | 10:27PM0.84m | 10:39AM0.76m | 11:04PM0.56m | 11:14AM0.51m | 11:37PM0.33m | 11:47AM0.31m | 00:10AM0.16m | 12:20PM0.18m | 00:42AM0.08m | 12:53PM0.14m | 1:15AM0.09m | 1:28PM0.18m | 1:50AM0.20m | |||||||
7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — | 7:26 | — | — | 7:26 | — | — | 7:28 | — | — | |
— | — | 9:07 | — | — | 9:05 | — | — | 9:04 | — | — | 9:01 | — | — | 9:00 | — | 8:58 | — | — | 8:55 | — | |
mm | — | — | — | — | 3 | 6 | — | 1 | 2 | 1 | 3 | — | 1 | 2 | 1 | — | — | 1 | — | — | — |
Temp °C | 20 | 21 | 20 | 20 | 21 | 22 | 19 | 20 | 20 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 20 | 19 | 17 | 18 | 18 |
Feels °C | 19 | 20 | 19 | 20 | 20 | 20 | 18 | 19 | 19 | 16 | 15 | 15 | 14 | 15 | 17 | 20 | 20 | 15 | 11 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 4 | SW 6 | SSW 6 | W 8 | WSW 8 | WSW 8 | WSW 8 | W 12 | — | — | — | — | — | WSW 7 | W 10 | W 12 | W 8 | W 8 | W 10 |
24 | 16 | 11 | 37 | 35 | 11 | 136 | 173 | 128 | 12 | — | — | — | — | — | 169 | 115 | 3 | 302 | 283 | 268 | |
Swell 2 Height (m) Direction Period (s) | SSE 5 | W 11 | W 10 | W 9 | W 9 | SSE 4 | W 8 | WNW 8 | W 11 | W 12 | — | — | — | — | — | W 10 | — | — | — | W 13 | — |
5 | 9 | 17 | 14 | 14 | 2 | 1 | 21 | 2 | 12 | — | — | — | — | — | 92 | — | — | — | 3 | — | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 8 | WSW 8 | — | — | — | W 12 | W 11 | — | — | — | — | — | — | — | — | — | — | — | — | — |
10 | 1 | 6 | — | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | SSW 3 | S 4 | — | SE 3 | SW 6 | SW 6 | — | — | WSW 6 | WSW 8 | WSW 8 | WSW 7 | WSW 8 | WSW 8 | — | SW 7 | WSW 6 | — | WSW 9 | — |
— | 8 | 1 | — | 2 | 28 | 32 | — | — | 143 | 893 | 406 | 463 | 514 | 362 | — | 99 | 237 | — | 168 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 93 | 93 | 93 | 1 | 0 | 404 | 93 | 93 | 6 | 332 | 293 | 93 | 106 | 132 | 20 | 93 | 253 | 461 | 466 | 175 | 106 |
Best forecast wave conditions in Morbihan - Brittany | |||||||||||||||||||||
Best forecast wave conditions in France | |||||||||||||||||||||
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Information about the Kerhillio Surf forecast
The above surf forecast table for Kerhillio provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kerhillio can be found by selecting the local surf guide option on the grey menu. Our Kerhillio 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 (Kerhillio) 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 Kerhillio 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.
Kerhillio is 21 km (13 miles) from the city of Lanester. If you plan a holiday in Morbihan - Brittany, look for hotels and other accommodation in Lanester. Lanester has rooms for a wide range of budgets as well as car hire and transport links.











