Surf Forecasts:
San Juan surf forecast from 28 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 10AM (local time) - 8ft (2.5m), 8s period, NNE swell with 866 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 2.5m 8s and forecast to arrive on Wednesday (Sep 02) at 10AM. 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 15s period and expected on Monday (Aug 31) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Wed 2nd Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Rusty here again, giving you the lowdown in feet, pounds and Fahrenheit.
Alright, let's cut to the chase. The next week and a half is a total bust. We've got a moderate amount of energy in the water, but it's being hammered by a relentless strong onshore wind out of the NNE and N, gusting up to 25 mph. The water temp is sitting at a notable 75.7°F, which is a touch warmer than usual, but that doesn't matter when the waves are a white-capped mess. From Friday, August 28th right through Thursday, September 3rd, leave the board at home. It's all blown out and choppy.
Things calm down slightly on Friday, September 4th. The wind drops to a light 6 mph cross-onshore, and the swell edges up to 4.6 ft. But it's a weak windswell with a short period of 8 seconds. It's marginal at best, with some cross-chop, but it's the first time you could even consider getting wet. Still, it's not good.
From September 5th through the 10th, we hit a flat patch. Swells drop below 3 ft and the wind stays unfavorable. The wave energy is basically nothing. A few longer period groundswells from the NNW show up on the 7th and 8th, but they're tiny, and there's still onshore wind messing them up.
Finally, the only real window appears on Friday, September 11th. The swell bumps back up to a solid 6.9 ft from the NNE, with a moderate 8-second period. The combined wave energy will be moderate (574). The bad news is the wind is still an onshore moderate breeze from the N at 15 mph, so it's going to be a lumpy, difficult paddle. For San Juan, this is an expert zone when it gets over 8 ft, and even at 6.9 ft in these winds, it'll be a handful. The waves will be there, but they'll be messy. It's the only real surf pulse in the whole 16-day stretch, but the conditions won't do it justice. Saturday the 12th will be similar, with a bit more wind and a little less size. Don't expect anything clean or perfect.
Short Range ForecastMostly dry. Warm (max 23°C on Sun morning, min 21°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Mon afternoon, min 22°C on Mon night). Mainly strong winds. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 8 | NNW 11 | NNE 8 | N 8 | N 10 | N 7 | N 7 | N 7 | NNE 7 | N 8 | N 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | N 8 | N 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 551 | 730 | 627 | 504 | 783 | 329 | 303 | 262 | 394 | 408 | 376 | 514 | 555 | 636 | 829 | 650 | 474 | 336 | 308 | 259 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on |
High Tide | 2:56AM2.31m | 3:08PM2.53m | 3:27AM2.35m | 3:40PM2.51m | 4:00AM2.34m | 4:14PM2.44m | 4:35AM2.28m | 4:51PM2.31m | 5:14AM2.18m | 5:34PM2.14m | 6:01AM2.04m | 6:29PM1.94m | ||||||||
Low Tide | 8:48PM0.10m | 8:53AM0.15m | 9:19PM0.07m | 9:25AM0.14m | 9:50PM0.08m | 9:59AM0.16m | 10:23PM0.14m | 10:36AM0.24m | 10:59PM0.26m | 11:17AM0.36m | 11:42PM0.42m | 12:08PM0.51m | 00:36AM0.61m | |||||||
 |  | | | | | | | | | | | |  |  | | | | | | |
 | — | — | 7:30 | — | — | 7:30 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — | 7:31 | — | — |
 | 8:21 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 22 | 22 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 24 | 23 |
Feels °C | 18 | 17 | 18 | 19 | 20 | 21 | 21 | 21 | 22 | 21 | 21 | 19 | 20 | 19 | 20 | 20 | 21 | 22 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | — | NNW 11 | NNW 11 | NNW 10 | NNW 10 | — | W 13 | W 12 | NW 11 | S 14 | S 14 | NNW 12 | NNW 11 | NNW 10 | N 11 | N 11 | NNW 10 | NNW 9 | NNE 8 | N 8 |
| kJ | — | 730 | 586 | 147 | 133 | — | 3 | 3 | 5 | 4 | 4 | 14 | 24 | 41 | 9 | 9 | 10 | 44 | 181 | 259 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | N 12 | — | — | — | S 14 | S 13 | — | — | S 14 | S 13 | NNW 9 | — | — |
| kJ | — | — | — | — | — | — | — | 3 | — | — | — | 4 | 4 | — | — | 4 | 3 | 8 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 8 | NE 7 | NNE 8 | N 8 | N 10 | N 7 | N 7 | N 7 | NNE 7 | N 8 | N 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | N 8 | — |
| kJ | 551 | 255 | 627 | 504 | 783 | 329 | 303 | 262 | 394 | 408 | 376 | 514 | 555 | 636 | 829 | 650 | 474 | 336 | 308 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 334 | 330 | 331 | 331 | 330 | 256 | 231 | 38 | 38 | 231 | 251 | 251 | 251 | 251 | 256 | 251 | 38 | 231 | 231 | 10 |
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.
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