Surf Forecasts:
Sennen Cove surf forecast from 17 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 8ft (2.5m), 9s period, WNW swell with 1,051 kJ wave energy.
Best Forecast Surf Conditions for Sennen Cove this week:
The most powerful waves expected at Sennen Cove in the next 16 days are 2.5m 9s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be 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 Friday (Aug 21) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 20th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Sennen Cove over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Sennen Cove has in store for us.
Right off the bat, I gotta be straight with you – it’s a tough watch for the next week or so. The first solid recommendation doesn’t pop up until Wednesday the 26th of August, so we’re looking at a good nine-day gap with no surf worth paddling out for. A lot of that first week is just onshore junk or messy cross-shore stuff, and the swell energy is weak to moderate at best, with readings like 135 (moderate energy) and 188 (moderate energy) just showing disorganised, choppy conditions.
Now, the standout of the whole forecast is definitely Sunday the 30th of August. That’s the one you want to circle. We’ve got a clean 8ft to 10ft swell rolling in from the west with a period around 9 seconds. The combined swell energy is pumping hard – between 750 and 1279 (strong). The wind is the real hero here: on Sunday morning it’s a light cross-offshore breeze that cleans things right up, and by Sunday afternoon, it goes glassy. Absolutely dead calm. That’s dreamy stuff. For the experienced crew, that 10ft is a proper handful but the wave comment says “excellent surf conditions for experienced surfers” so it could be one of those classic sessions. The only thing to keep in mind is that a west swell at Sennen Cove, with the optimum direction being west, is pure magic. Crowds? This spot can sometimes get busy, so on a Sunday with clean, solid swell, expect company.
Before that, Wednesday the 26th and Thursday the 27th offer a couple of marginal windows. On the 26th morning, there’s a 7ft west-southwest swell (moderate energy at 593) with light cross-onshore wind. It’s not perfect, but it’s surfable. Thursday the 27th gets a bit bigger with an 8ft west-southwest swell by the afternoon (strong energy at 821), but the wind is onshore, so it’ll be lumpy. That one is really only for the die-hards.
Then we roll into the very end of the forecast: Monday the 31st of August and Tuesday the 1st of September are a write-off again – strong onshores and messy. Nothing to get excited about.
One last thing: the water temp is sitting at a pleasant 65°F, which is about a touch warmer than normal for this time of year. Not a game-changer, but nice to know when you’re sitting in the lineup.
So there you have it. A long wait, but that Sunday the 30th is the jewel in the crown. Get it while it’s glassy.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed afternoon. Very mild (max 19°C on Mon morning, min 17°C on Mon afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Thu morning, min 15°C on Fri afternoon). Mainly fresh winds. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | WNW 8 | WNW 8 | W 7 | WNW 6 | WNW 6 | WNW 7 | WNW 8 | W 8 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | N 6 | N 5 | N 6 | N 6 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||||
73 | 143 | 107 | 144 | 160 | 293 | 416 | 531 | 1051 | 792 | 589 | 283 | 79 | 85 | 29 | 156 | 119 | 42 | 38 | 40 | 40 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:44PM5.11m | 9:03AM4.78m | 9:23PM4.68m | 9:44AM4.42m | 10:06PM4.24m | 10:30AM4.04m | 10:59PM3.84m | 11:34AM3.72m | 00:17AM3.56m | 1:05PM3.59m | 1:52AM3.54m | 2:30PM3.72m | 3:04AM3.75m | ||||||||
Low Tide | 2:54PM0.50m | 3:16AM0.65m | 3:31PM0.84m | 3:53AM1.03m | 4:11PM1.21m | 4:34AM1.41m | 4:59PM1.57m | 5:25AM1.74m | 6:02PM1.84m | 6:37AM1.94m | 7:29PM1.95m | 8:09AM1.93m | 8:57PM1.80m | ||||||||
6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | |
— | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | |
mm | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 17 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 |
Feels °C | 18 | 14 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 13 | 11 | 12 | 10 | 9 | 9 | 10 | 10 | 12 | 13 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | SW 18 | W 9 | W 8 | SSW 17 | SSW 17 | WNW 12 | WNW 11 | SSW 15 | SSW 14 | WNW 9 | WNW 9 | WNW 8 | WNW 7 | W 9 | W 10 | W 10 | W 9 | W 9 | W 9 | NW 4 |
73 | 12 | 13 | 12 | 28 | 29 | 55 | 65 | 22 | 21 | 589 | 283 | 79 | 48 | 24 | 47 | 45 | 25 | 25 | 26 | 4 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | — | SW 16 | SSW 17 | — | — | SSW 16 | SSW 16 | — | — | SSW 14 | SSW 14 | WSW 8 | W 8 | NW 8 | WNW 7 | NW 7 | E 6 | SSW 14 | SSW 14 | W 9 |
12 | — | 10 | 28 | — | — | 24 | 24 | — | — | 41 | 18 | 23 | 37 | 16 | 10 | 11 | 10 | 38 | 40 | 14 | |
Swell 3 Height (m) Direction Period (s) | S 11 | — | — | — | — | — | — | — | — | — | — | — | SSW 13 | SSW 13 | E 6 | SSW 15 | E 7 | SSW 15 | E 5 | — | SSW 14 |
2 | — | — | — | — | — | — | — | — | — | — | — | 17 | 17 | 6 | 21 | 8 | 42 | 2 | — | 40 | |
Wind waves Height (m) Direction Period (s) | WNW 6 | WNW 8 | W 7 | WNW 6 | WNW 6 | WNW 7 | WNW 8 | W 8 | WNW 9 | WNW 9 | N 5 | N 6 | N 5 | N 6 | N 5 | N 6 | N 6 | N 5 | N 4 | NNW 5 | N 4 |
48 | 143 | 107 | 144 | 160 | 293 | 416 | 531 | 1051 | 792 | 16 | 46 | 29 | 85 | 29 | 156 | 119 | 29 | 12 | 19 | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 391 | 518 | 206 | 272 | 858 | 250 | 269 | 215 | 179 | 179 | 20 | 5 | 31 | 206 | 206 | 206 | 263 | 16 | 18 | 377 | 268 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Sennen Cove Surf forecast
The above surf forecast table for Sennen Cove provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sennen Cove can be found by selecting the local surf guide option on the grey menu. Our Sennen Cove 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 (Sennen Cove) 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 Sennen Cove 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 North Cornwall? If you are looking for accommodation near Sennen Cove, camping, hotels and holiday cottages in North Cornwall, consider staying in Penzance which is 12 km (7 miles) away. Other places in and around North Cornwall where you can find information about places to rent, and car hire include Camborne which is 31 km (19 miles) away, The Lizard, Penryn and Falmouth.











