Surf Forecasts:
El Mongol surf forecast from 17 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 5.5ft (1.7m), 11s period, NNW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 11PM (local time) - 5.5ft (1.7m), 11s period, NNW swell with 698 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11PM (local time) - 1.5ft (0.5m), 12s period with NNW swell.
Best Forecast Surf Conditions for El Mongol this week:
The surf forecast for El Mongol over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 11PM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.5m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at El Mongol in the next 16 days are 1.7m 11s and forecast to arrive on Thursday (Aug 20) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Sunday (Aug 23) at 8PM.
| Wave Type | Time (CEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 19th Aug) | 1.5ft (0.5m) 12s |
| Best Surf | 2AM (Fri 21st Aug) | 5.5ft (1.7m) 11s |
| Most Powerful | 11PM (Thu 20th Aug) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for El Mongol over the next 16 days.
The Lowdown
Alright, grab your board and listen up. Rusty here, and I've been staring at the charts for El Mongol. It's a bit of a mixed bag, but there's some real magic brewing if you're patient.
To kick things off, the water is running at 71°, which is a touch warmer than we'd normally expect for this time of year – a nice little bonus for the skin.
We've got to be honest, the next week or so is pretty grim. Nothing really going on until Thursday, the 20th of August. The swell energy is weak, barely registering, and the winds are all over the place. It's a flat spell you'd use to fix your dings or clean the wax off your deck.
Things start to stir on Thursday afternoon, the 20th. That NNW swell bumps up to about 5 feet with a period of 12 seconds. The wave energy jumps significantly and with that glassy wind, the forecast is saying "good surf conditions". That afternoon session looks like the first real chance for a wave.
Friday the 21st continues that trend. Morning sees about 5 feet from the NNW with a period of 10 seconds, and the wind is dead calm – glassy as a mirror. Energy is pumping. The afternoon holds similar size at about 5 feet with glassy conditions again. Thursday afternoon through Friday is your first standout window. It's not huge, but it'll be clean and fun.
The next few days after that drop back to very ordinary surf. We get a little bump on the 24th and 25th of August, but the winds are a mess with cross-on conditions. It’s just messy.
Now, hold on to your leashes, because the real standout is shaping up for the very end of the month. Mark your calendars for Monday the 31st of August. The morning shows a 3 feet swell from the NNW, but check the period: 17 seconds. That's a seriously long period groundswell. The combined energy is massive, and it's dead calm (0 mph wind). The model is calling it "excellent surf conditions for experienced surfers." For a reef break like El Mongol, that long-period energy running into the reef is going to produce some absolute bombs. The shape will be excellent, and the lineup will be heavy. This is the one to wait for.
It stays solid into Tuesday the 1st of September, with a 8 feet swell from the NNW at 14 seconds. Energy is through the roof. However, the winds swing cross-shore. That's still a massive swell, but the conditions won't be as pristine as Monday. This size is firmly in expert territory only.
So to sum it up: there's a lot of flat or poor days, but don't get discouraged. The glassy conditions on Thursday the 20th and Friday the 21st give you a couple of solid, clean days. The absolute best on offer is the morning of Monday the 31st of August. That's your winner. Set an alarm.
Stay stoked.
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Tue afternoon, min 17°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 17mm), heaviest on Sat night. Warm (max 23°C on Thu afternoon, min 16°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
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) | NW 7 | NNW 7 | NNW 8 | NNW 8 | NW 8 | NNW 7 | WNW 8 | NW 10 | NNW 12 | NNW 11 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | N 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 54 | 47 | 45 | 24 | 14 | 11 | 6 | 25 | 156 | 366 | 623 | 604 | 561 | 527 | 255 | 143 | 136 | 98 | 54 | 72 | 117 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | cross | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross-off | cross-off | cross-off | cross | cross-off | cross-on | cross-off |
High Tide | 8:13AM3.77m | 8:31PM3.81m | 8:53AM3.56m | 9:11PM3.51m | 9:37AM3.34m | 9:59PM3.21m | 10:30AM3.13m | 11:01PM2.96m | 11:41AM2.99m | 00:24AM2.83m | 1:05PM2.99m | 1:49AM2.87m | 2:19PM3.12m | 2:55AM3.03m | |||||||
Low Tide | 2:11PM0.85m | 2:35AM0.94m | 2:50PM1.11m | 3:14AM1.21m | 3:34PM1.38m | 3:57AM1.48m | 4:30PM1.63m | 4:57AM1.72m | 5:56PM1.79m | 6:30AM1.83m | 7:42PM1.75m | 8:04AM1.74m | 8:52PM1.56m | ||||||||
 | |  |  | |  | | | | |  |  |  |  |  | | |  |  | |  | |
 | 7:28 | — | — | 7:30 | — | — | 7:31 | — | — | 7:31 | — | — | 7:33 | — | — | 7:33 | — | — | 7:35 | — | — |
 | — | — | 9:22 | — | — | 9:22 | — | — | 9:20 | — | — | 9:19 | — | — | 9:16 | — | — | 9:15 | — | — | 9:14 |
mm | — | — | — | — | — | — | — | — | — | — | — | 5 | 2 | 1 | — | — | — | 9 | 13 | 17 | 11 |
Temp °C | 22 | 22 | 21 | 22 | 24 | 22 | 21 | 24 | 22 | 22 | 23 | 19 | 18 | 21 | 20 | 18 | 21 | 18 | 17 | 17 | 17 |
Feels °C | 24 | 23 | 22 | 23 | 24 | 24 | 23 | 25 | 23 | 23 | 23 | 20 | 19 | 21 | 20 | 18 | 20 | 17 | 18 | 17 | 19 |
Swell 1 Height (m) Direction Period (s) | NW 7 | NNW 7 | NNW 8 | NNW 8 | NW 8 | NE 4 | NNW 5 | NW 10 | NNW 12 | NNW 11 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | N 7 |
| kJ | 54 | 47 | 45 | 24 | 14 | 3 | 4 | 25 | 156 | 366 | 623 | 604 | 561 | 527 | 255 | 143 | 136 | 98 | 54 | 72 | 117 |
Swell 2 Height (m) Direction Period (s) | NNE 6 | NNW 7 | NNE 5 | WNW 8 | WNW 8 | NNW 7 | WNW 8 | NNW 7 | NW 9 | N 11 | — | N 10 | NNW 10 | N 11 | W 11 | WNW 10 | NW 8 | — | WNW 8 | W 8 | W 9 |
| kJ | 12 | 20 | 9 | 7 | 6 | 11 | 6 | 9 | 61 | 9 | — | 106 | 182 | 223 | 2 | 10 | 55 | — | 7 | 6 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | W 7 | — | — | WNW 8 | NW 11 | WNW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | — | — | 6 | 5 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNE 6 | — | NE 5 | NE 3 | — | — | NE 4 | — | — | — | NE 4 | — | — | — | — | — | ENE 4 | ENE 5 | ENE 5 | ENE 5 |
| kJ | — | 21 | — | 6 | 3 | — | — | 1 | — | — | — | 20 | — | — | — | — | — | 35 | 40 | 61 | 42 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 131 | 19 | 127 | 287 | 212 | 214 | 165 | 0 | 0 | 165 | 0 | 0 | 14 | 0 | 0 | 0 | 61 | 19 | 23 | 0 |
Best forecast wave conditions in Asturias | |||||||||||||||||||||
Best forecast wave conditions in Spain (Europe) | |||||||||||||||||||||
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Information about the El Mongol Surf forecast
The above surf forecast table for El Mongol provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at El Mongol can be found by selecting the local surf guide option on the grey menu. Our El Mongol 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 (El Mongol) 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 El Mongol 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.
El Mongol is 2 km (1 miles) from Gijon. If you plan a holiday in Asturias, look for hotels and other accommodation in Gijon. Gijon has rooms for a wide range of budgets as well as car hire and transport links.
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