Surf Forecasts:
Caerhays surf forecast from 17 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 1PM (local time) - 2.5ft (0.8m), 5s period, ESE swell with 39 kJ wave energy.
Best Forecast Surf Conditions for Caerhays this week:
The most powerful waves expected at Caerhays in the next 16 days are 0.8m 5s and forecast to arrive on Saturday (Aug 22) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 18) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Sat 22nd Aug) | 2.5ft (0.8m) 5s |
Table - best surf conditions forecast for Caerhays over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's break down what's on offer at Caerhays for the next couple of weeks.
It’s a grim outlook, to be honest. The first sign of a wave is Monday the 17th, but it’s a joke. We’re talking a 0.3ft south swell, super long 18-second period, but the energy is a measly 10 – just a whisper. Water temp is 66°, which is a touch warmer than normal for this time of year, but that’s the only highlight. Wind is howling from the WNW at 15 mph, cross-off, so the surface is clean, but there’s absolutely no push.
This flat spell drags on for days. Tuesday the 18th and Wednesday the 19th are the same story – tiny surf and winds picking up to a fresh 19 mph, creating a cross-chop. Thursday the 20th morning shows a bit of a bump to 1ft from the SW, but period drops to 7 seconds and energy is only 22. It's clean, but those are windswell ripples. Friday the 21st gives us a glassy afternoon with a 0.7ft swell, but it's barely worth looking at. Saturday the 22nd brings 2ft from the E, but with a 4-second period and cross-onshore winds, it’s going to be a choppy mess.
From the 23rd all the way through the end of August, it’s clean but tiny. We get some glassy spells, like the afternoon of the 23rd, but the swell is only 0.7ft. On the 26th and 29th, we have clean 2ft to 2ft swells from the SW and S with offshore NW winds, but the energy is still moderate at best. The biggest pulse comes on Friday the 28th with 3ft to 4ft from the SSW, but a short 6-second period and a fresh 19 mph cross-onshore wind will make it lumpy and blown out.
The first of September doesn’t bring any relief. Tuesday the 1st has a 1ft swell with a decent 12-second period, but the cross-onshore wind from the SSW at 16 mph keeps it choppy.
Looking at the whole 16 days, there is no standout session. It's a long, flat run with only a few weak, short-period pulses. The best chance for a clean wave is probably Saturday the 29th with that 2ft swell and an offshore wind, but you’d be scratching for a ride. The quality just isn't there.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 21°C on Mon afternoon, min 16°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri afternoon. Very mild (max 19°C on Sun morning, min 13°C on Thu night). Winds decreasing (fresh winds from the NW on Thu afternoon, calm by Fri morning). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | S 18 | S 16 | S 17 | S 17 | S 17 | S 16 | S 16 | WSW 5 | SW 7 | SW 6 | SW 10 | WSW 8 | WSW 8 | S 16 | E 4 | ESE 6 | ESE 6 | SW 14 | SSW 14 | SW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6 | 5 | 5 | 5 | 6 | 5 | 5 | 9 | 16 | 11 | 16 | 7 | 6 | 5 | 15 | 39 | 8 | 8 | 20 | 8 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | glassy | off | cross | cross-on | off | cross-off | glassy | off |
High Tide | 9:11PM4.48m | 9:32AM4.20m | 9:50PM4.16m | 10:12AM3.94m | 10:33PM3.82m | 11:00AM3.66m | 11:27PM3.50m | 12:02PM3.41m | 00:39AM3.25m | 1:20PM3.27m | 1:59AM3.17m | 2:38PM3.31m | 3:13AM3.26m | |||||||
Low Tide | 3:46AM0.32m | 4:01PM0.55m | 4:21AM0.70m | 4:38PM0.92m | 4:58AM1.09m | 5:19PM1.29m | 5:40AM1.45m | 6:11PM1.62m | 6:43AM1.73m | 7:41PM1.82m | 8:33AM1.81m | 9:32PM1.71m | ||||||||
 |  |  | |  | | | | | | |  |  |  | | | | | | | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — |
mm | — | — | — | — | 1 | — | — | 1 | — | — | — | 1 | 3 | — | 2 | — | — | — | — | — |
Temp °C | 21 | 19 | 20 | 20 | 17 | 20 | 20 | 16 | 18 | 17 | 15 | 16 | 18 | 15 | 17 | 18 | 17 | 19 | 19 | 16 |
Feels °C | 19 | 18 | 17 | 16 | 13 | 15 | 14 | 12 | 13 | 11 | 13 | 14 | 16 | 13 | 13 | 17 | 13 | 17 | 18 | 13 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 16 | SW 4 | S 17 | SW 4 | S 16 | S 16 | W 7 | SW 7 | SW 6 | SW 10 | WSW 8 | WSW 8 | S 16 | SW 15 | ESE 6 | ESE 6 | E 4 | SSW 14 | ESE 5 |
| kJ | 6 | 5 | 2 | 5 | 3 | 5 | 5 | 4 | 16 | 10 | 16 | 7 | 6 | 5 | 8 | 39 | 7 | 1 | 20 | 2 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 7 | S 17 | — | S 17 | W 10 | W 10 | SW 15 | W 10 | WSW 10 | SW 14 | S 13 | S 13 | E 5 | W 10 | SW 15 | SW 15 | SW 14 | — | SW 14 |
| kJ | 2 | 1 | 5 | — | 6 | 2 | 2 | 9 | 2 | 11 | 8 | 3 | 3 | 1 | 2 | 8 | 8 | 8 | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 10 | S 14 | SW 14 | — | S 16 | — | SW 8 | S 12 | W 10 | W 9 | W 9 | W 9 | W 8 |
| kJ | — | — | — | — | — | — | — | 2 | 4 | 8 | — | 5 | — | 3 | 3 | 2 | 2 | 2 | 2 | 1 |
Wind waves Height (m) Direction Period (s) | W 3 | W 3 | WNW 3 | W 3 | WNW 2 | SW 4 | WSW 3 | WSW 5 | WNW 3 | NW 3 | — | — | — | — | E 4 | — | NNE 2 | — | — | — |
| kJ | 2 | 1 | 1 | 4 | 1 | 5 | 5 | 9 | 1 | 2 | — | — | — | — | 15 | — | 1 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 210 | 269 | 289 | 191 | 160 | 191 | 191 | 270 | 160 | 153 | 37 | 28 | 37 | 74 | 29 | 25 | 307 | 29 | 41 | 270 |
Best forecast wave conditions in South Cornwall | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Information about the Caerhays Surf forecast
The above surf forecast table for Caerhays provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Caerhays can be found by selecting the local surf guide option on the grey menu. Our Caerhays 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 (Caerhays) 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 Caerhays 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.
Caerhays is 13 km (8 miles) from Saint Austell. If you plan a holiday in South Cornwall, look for hotels and other accommodation in Saint Austell. Saint Austell has rooms for a wide range of budgets as well as car hire and transport links.
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