Surf Forecasts:
San Juan surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 2AM (local time) - 3.5ft (1.0m), 7s period, N swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 2AM (local time) - 3.5ft (1.0m), 7s period, N swell with 103 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 2AM (local time) - 3.5ft (1.0m), 7s period with N swell.
Best Forecast Surf Conditions for San Juan this week:
The surf forecast for San Juan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 2AM. The primary swell is predicted to be 1.0m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at San Juan in the next 16 days are 1.0m 7s and forecast to arrive on Tuesday (Sep 15) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 7s period and expected on Monday (Sep 14) at 2PM.
| Wave Type | Time (PST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 15th Sep) | 3.5ft (1.0m) 7s |
| Best Surf | 2AM (Tue 15th Sep) | 3.5ft (1.0m) 7s |
| Most Powerful | 2AM (Tue 15th Sep) | 3.5ft (1.0m) 7s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a straight look at what's on offer for San Juan.
Honestly, mate, the next two weeks are looking pretty flat. There's a real gap here. You've got over a week of nothing worth paddling out for, from now until the 26th of September. The swell is tiny, under 3 feet, and it's coming from the north.
Looking at the water temp, on Monday the 14th it's sitting at 84°, which is about average for this time of year. So at least the water feels normal, even if the surf is dead.
There's a bit of a pulse showing up around Sunday the 27th of September. The swell jumps to 6ft from the NNW, with a combined wave energy of 279, so we're finally seeing some life. By the afternoon it's pushing 7ft from the north with a 10-second period and energy up to 878. That's a moderate punch of energy. It's still cross-onshore wind, which isn't ideal, but it's light.
This isn't really a standout for a clean, perfect session. It's more "something to watch" if you're desperate. The swell is over 5ft, so it might be too much for the beginners. For the more experienced crew, the 10-second period means it won't be overly long or straight, which is a good thing for a spot like San Juan that's fairly exposed.
Honestly, there’s nothing that I’d call a true standout in this outlook. The best bet is to keep an eye on that Sunday the 27th as it gets closer.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Tue night. Warm (max 29°C on Mon afternoon, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | NNW 6 | NNW 6 | N 7 | NNW 7 | NNW 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 6 | NNW 6 | N 6 | N 6 | N 6 | N 6 | N 6 | N 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 40 | 37 | 103 | 62 | 47 | 43 | 59 | 48 | 66 | 62 | 52 | 36 | 23 | 22 | 13 | 20 | 19 | 20 | 28 | 18 | 18 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-on | on | glassy | cross | on | cross-off | cross-off | on | cross-off | cross-off | on | glassy | cross-off | on | glassy | cross | on | glassy |
High Tide | 11:03AM0.50m | 10:46PM0.70m | 12:28PM0.40m | 11:15PM0.77m | 11:50PM0.81m | 00:33AM0.83m | 1:25AM0.84m | 2:30AM0.84m | 3:41AM0.84m | ||||||||||||
Low Tide | 3:38PM0.42m | 6:56AM0.32m | 2:16PM0.39m | 8:53AM0.28m | 10:52AM0.23m | 12:12PM0.19m | 1:08PM0.16m | 1:55PM0.15m | |||||||||||||
 |  |  | | | | | | | | | | | |  | | | | | | | |
 | 5:46 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — |
 | — | 6:01 | — | — | 6:00 | — | — | 6:00 | — | — | 5:59 | — | — | 5:58 | — | — | 5:58 | — | — | 5:57 | — |
mm | — | 1 | 1 | — | 2 | 9 | 1 | 3 | 7 | — | 2 | 2 | — | 2 | — | — | 2 | 1 | — | 2 | — |
Temp °C | 28 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 28 | 27 | 29 | 29 | 28 | 29 | 28 | 28 | 29 | 28 | 28 |
Feels °C | 32 | 33 | 33 | 33 | 33 | 34 | 32 | 32 | 33 | 33 | 32 | 31 | 33 | 33 | 32 | 33 | 32 | 33 | 33 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NNW 6 | N 7 | NNW 7 | NNW 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | N 6 | NNW 6 | N 6 | N 6 | N 6 | N 6 | N 6 | N 6 |
| kJ | 40 | 37 | 103 | 62 | 47 | 43 | 59 | 48 | 66 | 62 | 52 | 36 | 23 | 22 | 13 | 20 | 19 | 20 | 28 | 18 | 18 |
Swell 2 Height (m) Direction Period (s) | WSW 7 | WSW 6 | WSW 7 | WSW 7 | WSW 6 | N 9 | SW 6 | SW 6 | W 6 | S 5 | — | — | — | — | — | — | — | — | — | W 6 | W 6 |
| kJ | 9 | 4 | 5 | 5 | 4 | 14 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | WSW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 158 | 158 | 0 | 168 | 158 | 1 | 115 | 19 | 1 | 168 | 158 | 141 | 168 | 158 | 158 | 168 | 158 | 158 | 166 | 158 | 141 |
Best forecast wave conditions in West Luzon | |||||||||||||||||||||
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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.
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