Surf Forecasts:
Mawgan Porth surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 4AM (local time) - 3.5ft (1.0m), 9s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 4PM (local time) - 6ft (1.9m), 9s period, WNW swell with 579 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 4AM (local time) - 3.5ft (1.0m), 9s period with W swell.
Best Forecast Surf Conditions for Mawgan Porth this week:
The surf forecast for Mawgan Porth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 4AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.1m and 14s. Another secondary swell of 0.6m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Mawgan Porth 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. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Saturday (Aug 22) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 21st Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 4AM (Fri 21st Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 4PM (Thu 20th Aug) | 6ft (1.9m) 9s |
Table - best surf conditions forecast for Mawgan Porth over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at the next couple of weeks for Mawgan Porth.
To be honest, it’s a pretty grim stretch ahead. We’ve got a solid 16-day window, but the surf quality is just not there for most of it. The wind is a nightmare, rarely playing nice, and the conditions are consistently turning the waves into a mess. There’s a long gap of days with no real recommendations, so you’re looking at a lot of time on the beach, not in the water.
The water is sitting at 66°, which is a touch warmer than normal for this time of year, so at least the temperature isn’t the problem.
The only real glimmer of hope comes early, on Friday the 21st of August. The morning session sees a weak little 3ft swell from the W, with a period of 8 seconds. The combined energy is weak (130). But the wind is a light NNE breeze at 6 mph, coming cross-offshore, which will keep it clean. The report says it’s surfable but very ordinary, and that’s about the best we’ve got. The break is a river mouth, which can handle smaller stuff, but don’t expect much. It’s the closest thing to a standout.
After that, the weekend of the 22nd and 23rd is tiny, with a long-period 14-second groundswell on Sunday that barely registers any energy (46) and is blown out by the afternoon. The following week gets a bit bigger – we see a 6ft to 8ft WNW swell from the 28th of August through the 1st of September, with combined energy pushing into the moderate to strong range (up to 2066). But the wind is just cruel. Constantly cross-onshore, often from the NW or SW, and too strong. It’s going to be lumpy, choppy, and blown out. For the experienced crew, there might be some power in the water, but it won’t be any fun to paddle out into. Honestly, for a beach-and-river setup like this, those conditions look more interesting for kite surfing than paddle surfing.
So, bottom line: if you’re desperate, Friday the 21st early is your only shot at something clean. Otherwise, save your energy. The forecasts can change, but right now it’s a waiting game.
Rusty.
Short Range ForecastLight rain (total 7mm), 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 6mm), 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 | on | on | on | on | on | on | on | on | cross-on | cross-on | cross | cross-off | cross | cross-off | off | cross-off | cross-off | cross-off | cross | cross |
High Tide | 9:15PM6.25m | 9:33AM5.88m | 9:53PM5.75m | 10:13AM5.43m | 10:34PM5.22m | 10:57AM4.97m | 11:25PM4.73m | 11:55AM4.57m | 00:36AM4.36m | 1:20PM4.36m | 2:10AM4.29m | 2:52PM4.47m | 3:30AM4.52m | |||||||
Low Tide | 3:33AM0.81m | 3:48PM1.02m | 4:08AM1.28m | 4:27PM1.49m | 4:48AM1.75m | 5:13PM1.94m | 5:40AM2.17m | 6:19PM2.31m | 6:58AM2.45m | 7:54PM2.45m | 8:37AM2.43m | 9:24PM2.25m | ||||||||
 |  | | |  |  |  | | | | |  | |  | | | | | | | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — |
mm | — | — | — | — | 3 | 1 | — | 3 | — | — | 1 | 1 | 1 | — | 2 | 1 | — | — | — | — |
Temp °C | 18 | 19 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 19 | 17 | 17 | 17 | 16 |
Feels °C | 17 | 17 | 15 | 14 | 14 | 14 | 13 | 12 | 12 | 13 | 13 | 14 | 12 | 13 | 14 | 16 | 12 | 12 | 12 | 14 |
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) | 237 | 298 | 264 | 221 | 135 | 221 | 221 | 264 | 135 | 132 | 48 | 0 | 48 | 56 | 7 | 0 | 282 | 7 | 49 | 241 |
Best forecast wave conditions in North Cornwall | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
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Information about the Mawgan Porth Surf forecast
The above surf forecast table for Mawgan Porth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mawgan Porth can be found by selecting the local surf guide option on the grey menu. Our Mawgan Porth 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 (Mawgan Porth) 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 Mawgan Porth 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 Mawgan Porth, camping, hotels and holiday cottages in North Cornwall, consider staying in Newquay which is 8 km (5 miles) away. Other places in and around North Cornwall where you can find information about places to rent, and car hire include Padstow which is 11 km (7 miles) away, Bodmin, Truro and Saint Austell.
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