Surf Forecasts:
Harlyn surf forecast from 17 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 4PM (local time) - 6ft (1.9m), 9s period, WNW swell with 579 kJ wave energy.
Best Forecast Surf Conditions for Harlyn this week:
The most powerful waves expected at Harlyn in the next 16 days are 1.9m 9s and forecast to arrive on Thursday (Aug 20) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Thu 20th Aug) | 6ft (1.9m) 9s |
Table - best surf conditions forecast for Harlyn over the next 16 days.
The Lowdown
Alright, let’s keep it simple. For the next 16 days at Harlyn, there’s not much to write home about. The water’s sitting at 66°F, which is a good 4° warmer than normal for this time of year – that’s a notable difference, so you’ll be fine in a shorty.
From Monday 17 August through to the morning of Tuesday 25 August, it’s dead. The wind is mostly cross or onshore, the swell is small and weak. Combined energies are mostly under 200 (weak), with a few bumps to 420 or 600 (moderate) on the 20th, but the wind is lumpy and cross-onshore, making it a mess. It looks more like a kite surfing day than a paddle surfing day.
On Tuesday 25 August, things clean up for a bit. The morning has fresh offshore wind from the south at 19 mph, and a small 3ft swell from the WNW with a 10-second period. The combined energy is 140 (weak), so it’s not powerful, but it’s clean. This spot is inconsistent and beginner-friendly, but crowds are often a problem, so expect company.
The only real standout is Tuesday 1 September. The morning shows an 8ft swell from the WNW with an 11-second period, and the combined energy hits 1895 (very strong). Winds are cross-off from the SSW at 19 mph, keeping it clean. That’s over 8ft, so it’s for experts only. The afternoon pushes it to 10ft from the same direction with a combined energy of 2066 (very strong). Marginal surf forecast or questionable tide conditions are noted, so it’s not a sure thing, but it’s the best of the run. For a long-range call, it’s promising but less certain. Crowds are often an issue.
So, over a week of nothing, then a tiny clean window on the 25th, and one big, expert-only chance on 1 September. That’s it.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Tue night. Very mild (max 19°C on Mon night, min 16°C on Thu morning). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Sat morning. Very mild (max 19°C on Sat afternoon, min 15°C on Thu night). Wind will be generally light. | |||||||||||||||||||
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) | W 8 | W 6 | WNW 6 | W 6 | WNW 7 | W 6 | W 7 | W 8 | WNW 7 | WNW 9 | W 9 | W 8 | N 5 | W 9 | W 9 | W 9 | N 5 | WSW 14 | WSW 14 | WSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 118 | 92 | 139 | 135 | 180 | 112 | 250 | 523 | 276 | 579 | 241 | 109 | 33 | 36 | 23 | 37 | 27 | 19 | 19 | 20 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | on | on | cross-off | cross-on | cross-on | cross-on | on | on |
High Tide | 9:19PM6.35m | 9:38AM5.98m | 9:57PM5.84m | 10:17AM5.52m | 10:38PM5.30m | 11:01AM5.06m | 11:28PM4.80m | 11:59AM4.65m | 00:39AM4.43m | 1:23PM4.42m | 2:13AM4.35m | 2:55PM4.54m | 3:34AM4.59m | |||||||
Low Tide | 3:35AM0.82m | 3:50PM1.03m | 4:11AM1.29m | 4:29PM1.50m | 4:51AM1.77m | 5:16PM1.96m | 5:43AM2.20m | 6:22PM2.34m | 7:02AM2.49m | 7:57PM2.48m | 8:40AM2.46m | 9:27PM2.28m | ||||||||
 |  | | |  |  | | | | | |  |  |  | | | | | | | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — |
mm | — | — | — | — | 3 | 2 | 1 | 3 | — | — | 1 | 1 | — | — | 2 | 1 | — | — | — | — |
Temp °C | 18 | 19 | 18 | 18 | 18 | 17 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 19 | 17 | 16 | 16 | 16 |
Feels °C | 17 | 17 | 16 | 14 | 14 | 12 | 13 | 12 | 12 | 13 | 13 | 14 | 12 | 12 | 14 | 15 | 12 | 12 | 10 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 18 | W 16 | SW 17 | SW 17 | SW 17 | W 8 | WNW 10 | WSW 15 | W 9 | WNW 9 | W 9 | W 8 | W 6 | W 9 | N 4 | W 9 | W 9 | N 4 | W 9 | W 8 |
| kJ | 12 | 5 | 11 | 11 | 12 | 78 | 71 | 23 | 136 | 579 | 241 | 109 | 18 | 36 | 8 | 37 | 14 | 13 | 14 | 12 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | SW 16 | SW 16 | — | SW 14 | WSW 14 | WSW 14 | SW 13 | W 8 | SW 13 | W 9 | WSW 15 | WSW 15 | W 9 | WSW 14 | WSW 14 |
| kJ | — | — | — | — | — | 10 | 10 | — | 8 | 21 | 19 | 7 | 21 | 7 | 23 | 21 | 21 | 14 | 19 | 20 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 16 | SW 13 | SW 16 | SW 15 | SW 12 | — | WSW 14 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 10 | 7 | 10 | 9 | 6 | — | 19 | — | — |
Wind waves Height (m) Direction Period (s) | W 8 | W 6 | WNW 6 | W 6 | WNW 7 | W 6 | W 7 | W 8 | WNW 7 | — | N 5 | N 5 | N 5 | N 5 | — | N 5 | N 5 | — | N 4 | N 4 |
| kJ | 118 | 92 | 139 | 135 | 180 | 112 | 250 | 523 | 276 | — | 12 | 12 | 33 | 33 | — | 21 | 27 | — | 13 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 245 | 305 | 256 | 227 | 127 | 227 | 227 | 256 | 127 | 123 | 56 | 2 | 56 | 48 | 2 | 8 | 281 | 2 | 56 | 237 |
Best forecast wave conditions in North Cornwall | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Information about the Harlyn Surf forecast
The above surf forecast table for Harlyn provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Harlyn can be found by selecting the local surf guide option on the grey menu. Our Harlyn 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 (Harlyn) 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 Harlyn 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.
Harlyn is 6 km (4 miles) from Padstow. If you plan a holiday in North Cornwall, look for hotels and other accommodation in Padstow. Padstow has rooms for a wide range of budgets as well as car hire and transport links.
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