
Surf Forecasts:
Gwithian surf forecast from 11 Sep 2026:
- Most powerful swell: Sunday 13 Sep, 4AM (local time) - 6ft (1.8m), 10s period, W swell with 661 kJ wave energy.
Best Forecast Surf Conditions for Gwithian this week:
The most powerful waves expected at Gwithian in the next 16 days are 1.8m 10s and forecast to arrive on Sunday (Sep 13) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Sep 15) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sun 13th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Gwithian over the next 16 days.
The Lowdown
Hey crew, Rusty here. Let’s slice through the next couple of weeks in Cornwall.
Honestly, the first week and a half is a total bust. Don’t even wax up. There’s a huge gap from now until the back half of September with nothing but poor surf. The wind’s all cross-shore or cross-on, making everything lumpy and choppy. The water’s a touch warmer than normal for this time of year at 64°.
Swell shows up between 2ft and 7ft, but it’s paired with funky wind and short periods. The wave energy is moderate at best (like 570 early on), but it’s all blown out. A few days have a decent groundswell (10-12 second period), but the onshore wind ruins it. Just nasty.
Then, a huge light at the end of the tunnel. Circle Tuesday, September 23rd.
Gwithian (Cornwall) is the only spot that matters. Tuesday morning cleans up with a 8ft swell and a light offshore ESE breeze at just 6 mph. The combined wave energy is a solid 727. It’s clean but with short period (8 seconds), it’ll be a bit dumpy – better for competent surfers. But the afternoon is the real standout. You’re looking at a massive 10ft groundswell from the west with light east winds blowing offshore. The combined energy hits 1569 – that’s a heaving, powerful ocean. With a 10-second period, this is real deal, heavy beach break waves. It’s for experts only. This is the session to wait for. It’s a long way out, so keep tabs on it, but the signs are good.
Wednesday, September 24th, still has solid juice with a 8ft morning swell from the WNW and moderate offshore ESE wind. The energy is still high at 1512 and a 12-second period gives it real shape. The wind is a bit stronger at 15 mph, so it won’t be as glassy as Tuesday, but still excellent for the experienced crew.
After that, it drops off quick.
Bottom line: Forget this week. The gold is on that Tuesday. If you can wait, Tuesday afternoon is the one. Big, clean, powerful surf for the first time in ages.
Rusty, signing off.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Very mild (max 19°C on Sat afternoon, min 15°C on Fri night). Winds decreasing (fresh winds from the SW on Thu afternoon, light winds from the W by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Mon morning, min 14°C on Tue night). Winds increasing (light winds from the SW on Sun night, fresh winds from the NW by Tue morning). | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 10 | W 9 | W 9 | W 8 | W 8 | W 8 | W 10 | W 10 | W 10 | W 9 | W 9 | W 9 | W 8 | W 11 | WNW 7 | WNW 8 | W 10 | W 10 | WNW 10 |
Wave Graph | ||||||||||||||||||||
570 | 696 | 372 | 292 | 156 | 201 | 309 | 610 | 522 | 377 | 251 | 160 | 153 | 107 | 516 | 431 | 449 | 561 | 506 | 356 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 5:34PM6.33m | 5:57AM6.21m | 6:14PM6.58m | 6:34AM6.39m | 6:51PM6.64m | 7:10AM6.42m | 7:27PM6.53m | 7:45AM6.29m | 8:02PM6.26m | 8:18AM6.02m | 8:36PM5.87m | 8:52AM5.66m | 9:11PM5.40m | |||||||
Low Tide | 00:02AM0.12m | 12:16PM0.13m | 00:39AM-0.05m | 12:53PM0.01m | 1:14AM-0.04m | 1:27PM0.05m | 1:47AM0.13m | 2:01PM0.24m | 2:18AM0.42m | 2:33PM0.56m | 2:49AM0.80m | 3:06PM0.95m | 3:22AM1.23m | |||||||
— | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | |
7:46 | — | — | 7:45 | — | — | 7:43 | — | — | 7:40 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | |
mm | 1 | 1 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 17 | 18 | 17 | 17 | 16 | 18 | 19 | 18 | 19 | 18 | 19 | 20 | 20 | 19 | 17 | 17 | 16 | 14 | 14 | 15 |
Feels °C | 12 | 17 | 15 | 16 | 14 | 14 | 15 | 15 | 19 | 17 | 19 | 19 | 19 | 18 | 13 | 12 | 12 | 9 | 9 | 12 |
Swell 1 Height (m) Direction Period (s) | — | WSW 10 | W 9 | W 9 | W 8 | WNW 14 | NW 13 | S 14 | W 10 | W 10 | W 9 | W 9 | W 9 | W 8 | SSW 5 | SSW 6 | WNW 8 | W 10 | W 10 | WNW 10 |
— | 696 | 372 | 292 | 156 | 20 | 40 | 4 | 522 | 377 | 251 | 160 | 153 | 107 | 13 | 6 | 449 | 561 | 506 | 356 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | S 16 | — | SW 15 | SW 15 | — | SW 13 | SW 13 | S 13 | SW 12 | SW 12 | WNW 12 | S 11 | S 11 | WNW 10 | S 11 | S 13 | N 5 |
— | — | — | 5 | — | 8 | 8 | — | 7 | 7 | 3 | 6 | 6 | 27 | 2 | 2 | 136 | 2 | 4 | 13 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 15 | — | — | — | — | — | — | W 14 | S 12 | — | — | S 11 | — | — | S 13 |
— | — | — | — | — | 4 | — | — | — | — | — | — | 4 | 3 | — | — | 2 | — | — | 4 | |
Wind waves Height (m) Direction Period (s) | WSW 8 | — | — | — | — | W 8 | W 8 | W 10 | — | — | — | — | — | S 4 | W 11 | WNW 7 | — | NNW 6 | N 5 | — |
570 | — | — | — | — | 201 | 309 | 610 | — | — | — | — | — | 9 | 516 | 431 | — | 50 | 36 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 210 | 25 | 5 | 25 | 4 | 5 | 5 | 31 | 69 | 210 | 5 | 4 | 4 | 1 | 577 | 214 | 115 | 69 | 168 | 94 |
Best forecast wave conditions in North Cornwall | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Information about the Gwithian Surf forecast
The above surf forecast table for Gwithian provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Gwithian can be found by selecting the local surf guide option on the grey menu. Our Gwithian 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 (Gwithian) 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 Gwithian 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.
Gwithian is 6 km (4 miles) from Camborne. If you plan a holiday in North Cornwall, look for hotels and other accommodation in Camborne. Camborne has rooms for a wide range of budgets as well as car hire and transport links.










