Surf Forecasts:
San Juan surf forecast from 12 Jul 2026:
- Most powerful swell: Sunday 19 Jul, 8PM (local time) - 8ft (2.5m), 9s period, W swell with 1,306 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 9s and forecast to arrive on Sunday (Jul 19) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Sunday (Jul 19) at 11AM.
| Wave Type | Time (PST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 19th Jul) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for San Juan over the next 16 days.
Alright, Rusty here again. Let’s break down the same outlook in feet and miles per hour for you.
Honestly, we’ve got a pretty quiet 16 days ahead for San Juan. There isn’t one session you’d point to and say “that’s the one.” The main story is tiny surf and a lot of flat spells.
From Monday, July 13th, we’ve got ankle-snappers at best, with waves around 0.7ft to 1ft out of the WNW or W. The energy is real weak – only about 4 to 18 on the combined scale. There are several days in a row with zero surf, like from Tuesday the 14th through Friday the 17th. Even the little 1ft bumps that show up later are barely doing anything.
The biggest we see is on Sunday, July 19th, with a 3ft swell from the NW, but with an 8 second period and cross-off winds blowing at 22 mph, it’s messy and not clean. It still gets marked as poor surf conditions.
Into the second week, it’s more of the same. Swells stay around 0.7ft to 1ft, with very low energy readings. The wind turns light offshore on some mornings which would make the surface glassy, but there’s no punch in the waves. You might get a clean little ripple for a longboard, but nothing that will get the heart pumping.
San Juan is an inconsistent reef break, and this kind of flat stretch is pretty normal around here. It doesn’t usually stay dead for long, but for the next two weeks, I’d leave the board in the shed.
Rusty.
Short Range ForecastHeavy rain (total 33mm), heaviest during Mon afternoon. Warm (max 29°C on Tue morning, min 26°C on Mon afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 340mm), heaviest during Fri afternoon. Warm (max 28°C on Thu morning, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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) | WNW 6 | WSW 10 | WSW 10 | WSW 10 | WNW 10 | WSW 9 | WNW 6 | WSW 9 | WSW 9 | W 9 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | SW 8 | W 9 | WNW 8 | WNW 9 | W 9 | WNW 10 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 0 | 0 | 0 | 19 | 0 | 3 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 6 | 24 | 45 | 40 | 51 | 854 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 8:00AM1.22m | 8:51AM1.21m | 9:39AM1.16m | 10:24AM1.07m | 11:04AM0.94m | 11:37AM0.80m | |||||||||||||||
Low Tide | 5:38PM-0.09m | 6:28PM-0.10m | 7:14PM-0.07m | 7:53PM-0.01m | 8:20PM0.08m | 8:31PM0.18m | 8:23PM0.27m | ||||||||||||||
 |  |  |  |  | | | | | | | |  | | | | | | | | | |
 | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — |
mm | 1 | 6 | 2 | — | 3 | 4 | 2 | 4 | 11 | 6 | 17 | 45 | 33 | 42 | 70 | 23 | 44 | 60 | 138 | 52 | 19 |
Temp °C | 28 | 27 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 27 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 |
Feels °C | 28 | 28 | 31 | 29 | 31 | 30 | 30 | 31 | 30 | 30 | 29 | 28 | 27 | 28 | 26 | 26 | 26 | 26 | 27 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WNW 10 | WSW 9 | WSW 9 | — | WSW 9 | WSW 9 | WSW 9 | WSW 8 | WSW 8 | WSW 8 | — | WSW 8 | WNW 8 | WNW 9 | W 9 | WNW 10 | W 9 |
| kJ | 325 | 430 | 491 | 318 | 19 | 322 | 268 | — | 189 | 162 | 158 | 144 | 147 | 122 | — | 370 | 24 | 45 | 40 | 51 | 854 |
Swell 2 Height (m) Direction Period (s) | WNW 6 | — | — | — | — | — | WNW 6 | — | — | W 9 | — | — | — | — | — | W 9 | — | — | NW 7 | NW 7 | — |
| kJ | 4 | — | — | — | — | — | 3 | — | — | 6 | — | — | — | — | — | 6 | — | — | 18 | 26 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 4 | SSE 4 | SSE 3 | S 4 | WSW 9 | SE 2 | SSE 3 | WSW 9 | SE 2 | S 3 | SSE 3 | S 3 | S 3 | SSE 4 | SW 8 | S 3 | WSW 8 | WSW 9 | WSW 9 | WSW 10 | SW 4 |
| kJ | 26 | 9 | 3 | 22 | 404 | 2 | 2 | 251 | 1 | 5 | 3 | 5 | 8 | 19 | 400 | 1 | 560 | 840 | 1168 | 1433 | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 548 | 732 | 600 | 81 | 964 | 964 | 81 | 947 | 933 | 81 | 548 | 548 | 81 | 548 | 947 | 823 | 548 | 158 | 548 | 885 | 732 |
Best forecast wave conditions in West Luzon | |||||||||||||||||||||
Best forecast wave conditions in Philippines | |||||||||||||||||||||
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.
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