Surf Forecasts:
San Juan surf forecast from 17 Aug 2026:
- Most powerful swell: Sunday 23 Aug, 10PM (local time) - 6ft (1.9m), 10s period, N swell with 660 kJ wave energy.
Best Forecast Surf Conditions for San Juan this week:
The most powerful waves expected at San Juan in the next 16 days are 1.9m 10s and forecast to arrive on Sunday (Aug 23) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 13s period and expected on Wednesday (Aug 19) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Sun 23rd Aug) | 6ft (1.9m) 10s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s coming up for San Juan.
To be honest, the next couple of weeks are a bit of a write-off for decent waves. We’ve got a long dry spell ahead. The first solid surf recommendation doesn’t show up until Sunday the 23rd of August, and even that’s not great. So from now, 16 August, through to Saturday the 22nd, it’s flat or just messy windswell with poor conditions. Nothing worth paddling out for.
Even when the swell does show up, it’s held back by strong onshore winds. For example, on Sunday the 23rd afternoon, we see a 5 ft swell from the north with a period of 10 seconds, and combined wave energy reading 508 (moderate energy) – but it’s blown out by a 12 mph cross-onshore breeze making it choppy. That’s the best on offer, and it’s still poor surf conditions. Not a standout.
Through the last week of August and into the final days, the swell picks up a bit more, with heights hitting 7 ft on the 25th and energy jumping to 674 (moderate energy), but again, winds are howling onshore from the NNE at 22–25 mph. The period is short, only 7–8 seconds, so it’s junky, wind-affected slop. That size at 7 ft is too big for beginners and with those winds, it’s really only for experts who don’t mind a battle, but the quality is poor.
San Juan is a reef break that’s consistent and exposed, with an optimum swell from the NNW. The swell we get is mostly from the north or NNE, so it’s not the ideal angle, and that hurts the shape, especially with the short period.
Water temp right now is 73°F – about normal for this time of year, so no surprises there.
If you’re determined, the least bad window might be around the 23rd, but honestly, this setup with the strong onshore wind and short-period chop looks more interesting for kite surfing than paddle surfing. Don’t hold your breath; forecasts can change, but right now it’s a lean run.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Sun afternoon, min 22°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Wed afternoon, min 22°C on Wed night). Mainly fresh winds. | |||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||
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) | N 7 | N 8 | N 8 | N 9 | N 9 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 8 | N 7 | N 7 | NNE 7 | N 7 | N 10 |
Wave Graph | ||||||||||||||||||||
124 | 186 | 210 | 220 | 184 | 129 | 129 | 135 | 161 | 133 | 136 | 136 | 161 | 219 | 159 | 178 | 295 | 232 | 148 | 98 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross-on | on | on | on | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | on |
High Tide | 4:50PM2.44m | 5:11AM2.18m | 5:27PM2.23m | 5:49AM2.04m | 6:07PM1.99m | 6:30AM1.88m | 6:53PM1.77m | 7:22AM1.73m | 7:58PM1.59m | 8:40AM1.62m | 9:36PM1.51m | 10:19AM1.63m | 11:09PM1.57m | |||||||
Low Tide | 11:00PM0.22m | 11:09AM0.33m | 11:35PM0.40m | 11:49AM0.50m | 00:11AM0.59m | 12:34PM0.68m | 00:55AM0.77m | 1:34PM0.84m | 2:00AM0.91m | 3:08PM0.93m | 3:41AM0.96m | 4:53PM0.89m | ||||||||
— | — | 7:22 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:26 | — | — | |
8:32 | — | — | 8:31 | — | — | 8:30 | — | — | 8:30 | — | — | 8:29 | — | — | 8:28 | — | — | 8:27 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 22 | 23 | 23 | 22 | 23 | 24 | 23 | 23 | 24 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 |
Feels °C | 23 | 22 | 22 | 22 | 23 | 23 | 26 | 22 | 23 | 25 | 23 | 22 | 22 | 20 | 22 | 21 | 19 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | NNW 9 | N 8 | N 8 | N 9 | N 9 | N 8 | N 8 | N 8 | N 8 | N 8 | WNW 8 | WNW 10 | WNW 9 | WNW 9 | NW 9 | WNW 8 | N 13 | NNE 7 | N 11 | N 6 |
44 | 186 | 210 | 220 | 184 | 129 | 129 | 135 | 161 | 133 | 6 | 37 | 33 | 32 | 19 | 14 | 31 | 232 | 85 | 92 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | NNW 9 | NNW 8 | NNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 9 | WNW 8 | WNW 8 | WNW 11 | S 13 | S 13 | S 13 | W 12 | NW 11 | WNW 8 | N 12 | WNW 10 | N 10 |
6 | 30 | 45 | 7 | 7 | 6 | 6 | 15 | 13 | 13 | 11 | 3 | 3 | 3 | 3 | 5 | 6 | 99 | 18 | 98 | |
Swell 3 Height (m) Direction Period (s) | — | WNW 8 | WNW 9 | WNW 8 | NNW 8 | S 14 | NW 9 | WNW 9 | S 13 | NW 11 | S 14 | — | — | — | N 15 | N 14 | WNW 11 | WNW 10 | S 13 | WNW 10 |
— | 6 | 8 | 7 | 6 | 4 | 3 | 8 | 3 | 5 | 4 | — | — | — | 4 | 4 | 11 | 19 | 3 | 18 | |
Wind waves Height (m) Direction Period (s) | N 7 | — | — | — | — | — | — | — | — | — | N 8 | N 8 | N 8 | N 8 | N 8 | N 7 | N 7 | — | N 7 | — |
124 | — | — | — | — | — | — | — | — | — | 136 | 136 | 161 | 219 | 159 | 178 | 295 | — | 148 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 16 | 38 | 17 | 10 | 10 | 10 | 16 | 17 | 251 | 231 | 251 | 231 | 38 | 231 | 231 | 251 | 38 | 231 | 38 |
Best forecast wave conditions in Lanzarote | ||||||||||||||||||||
Best forecast wave conditions in Spain (Africa) | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the San Juan Surf forecast
The above surf forecast table for San Juan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at San Juan can be found by selecting the local surf guide option on the grey menu. Our San Juan 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 (San Juan) 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 San Juan 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.
San Juan is 8 km (5 miles) from Teguise. If you plan a holiday in Lanzarote, look for hotels and other accommodation in Teguise. Teguise has rooms for a wide range of budgets as well as car hire and transport links.











