Surf Forecasts:
San Juan surf forecast from 21 Sep 2026:
- Most powerful swell: Thursday 24 Sep, 2AM (local time) - 1.5ft (0.5m), 6s period, N swell with 21 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 0.5m 6s and forecast to arrive on Thursday (Sep 24) 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 0.9m 8s period and expected on Monday (Sep 28) at 2PM.
| Wave Type | Time (PST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 24th Sep) | 1.5ft (0.5m) 6s |
Table - best surf conditions forecast for San Juan over the next 16 days.
Short Range ForecastModerate rain (total 19mm), heaviest on Wed night. Warm (max 29°C on Thu morning, min 26°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 49mm), heaviest during Thu night. Warm (max 29°C on Sat afternoon, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | ||||||||||||||
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 6 | NNW 6 | N 6 | N 6 | N 6 | N 6 | N 6 | N 6 | NNW 6 | N 7 | N 6 | N 6 | N 6 | N 6 | N 6 | N 5 | WSW 6 | WSW 7 | WSW 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 17 | 10 | 9 | 18 | 16 | 13 | 21 | 19 | 13 | 15 | 12 | 6 | 3 | 3 | 2 | 2 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | on | cross-off | cross | on | cross-off | cross-off | cross-on | cross-off | cross-off | glassy | glassy | cross-on | cross-on | off | cross-off | glassy | off |
High Tide | 4:49AM0.85m | 5:48AM0.84m | 6:40AM0.82m | 7:28AM0.78m | 9:11PM0.41m | 8:18AM0.71m | 9:03PM0.49m | 9:12AM0.62m | 9:16PM0.59m | ||||||||||
Low Tide | 3:07PM0.16m | 3:28PM0.19m | 3:38PM0.23m | 3:40PM0.28m | 00:43AM0.37m | 3:35PM0.33m | 2:29AM0.34m | 3:23PM0.38m | 4:01AM0.30m | ||||||||||
 |  |  |  | | | | | | |  | | | | | | | |  | |
 | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — |
 | 5:55 | — | 5:54 | — | — | 5:53 | — | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:51 | — |
mm | — | — | 2 | 5 | — | 2 | 6 | — | 4 | 30 | 2 | 1 | 2 | — | — | 8 | 2 | 4 | 18 |
Temp °C | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 28 | 28 | 28 | 28 | 27 | 28 | 29 | 28 | 28 | 28 | 25 |
Feels °C | 32 | 32 | 32 | 33 | 32 | 32 | 33 | 33 | 32 | 33 | 32 | 32 | 32 | 31 | 33 | 33 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | N 6 | NNW 6 | N 6 | N 6 | N 6 | N 6 | N 6 | N 6 | NNW 6 | N 7 | N 6 | N 6 | SW 6 | SW 6 | SW 7 | WSW 7 | WSW 6 | WSW 7 | WSW 7 |
| kJ | 17 | 10 | 9 | 18 | 16 | 13 | 21 | 19 | 13 | 15 | 12 | 6 | 9 | 10 | 14 | 9 | 15 | 21 | 18 |
Swell 2 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | W 5 | — | — | SW 7 | SW 6 | SSE 3 | S 3 | N 6 | N 6 | N 6 | N 5 | — | — | — |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | — | — | 2 | 2 | 2 | 1 | 3 | 3 | 2 | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 6 | SW 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SE 3 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 158 | 166 | 141 | 141 | 168 | 166 | 166 | 168 | 141 | 548 | 548 | 788 | 166 | 166 | 158 | 158 | 158 | 158 | 158 |
Best forecast wave conditions in West Luzon | |||||||||||||||||||
Best forecast wave conditions in Philippines | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our San Juan surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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