
Surf Forecasts:
San Juan surf forecast from 26 Jul 2026:
- Most powerful swell: Monday 27 Jul, 8AM (local time) - 1.5ft (0.4m), 9s period, NW swell with 27 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 0.4m 9s and forecast to arrive on Monday (Jul 27) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Monday (Jul 27) at 11PM.
| Wave Type | Time (PST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Mon 27th Jul) | 1.5ft (0.4m) 9s |
Table - best surf conditions forecast for San Juan over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what's comin' up for our little slice of paradise. Honestly, for the next little while, it’s a bit of a tough stretch. We're lookin' at a real dry spell, so don’t be in a rush to paddle out.
First up, the water temp is sittin' at 87°, which is a touch warmer than normal for the time of year. It's a nice bath, but unfortunately, the surf is dead quiet. From Monday the 27th of July all the way through to Monday the 3rd of August, it’s just flat, flat, flat. You're lookin' at a solid week or more of tiny dribbles, with swell heights barely registering. The combined wave energy is down to nearly zero most days – a measly 1 or 2 (weak energy) at best. There is a slight breeze on some afternoons, but even the glassy mornings can't polish a turd. No waves, no fun.
It's not until the 4th of August that we see a pulse. Tuesday morning, the swell pops up to 0.7m (2ft) from the W with a short 7-second period. The combined energy climbs to a meagre 52 (weak energy), so don't get excited. It's still pretty poor and probably not worth the effort.
Now, here's where it gets interesting, but you have to be patient. After another flat spell, we finally get a solid pulse of energy on Saturday the 8th of August. We’re talkin’ a 3.5m (12ft) W swell with a 10-second period. That’s a proper groundswell folks! The combined energy shoots up to 2606 (strong wave energy). The only catch is that this is big – over 2.5m (8ft) – so this is strictly for experts only. Beginners, stay out of the water. It'll be even better on Sunday the 9th, with the swell holding at 4.0m (13ft) from the W, and excellent conditions for experienced surfers. The wind is bangin' offshore both days, which is a massive positive. Expect clean, groomed faces if you know what you're doin'.
The best of the bunch, the true standout, is Monday the 10th of August. The swell pumps up to a solid 4.5m (15ft) from the W, with a very long period of 12 seconds. The combined energy hits a massive 5752 (very strong wave energy). The wind is cross-offshore, so it's still clean. But hear this – the swell is predicted to be too big for San Juan to handle properly. That means it's gonna be a washing machine, and likely dangerous for everyone. Keep your head up and watch out.
After that, it settles down. Tuesday the 11th still has some size left over – a 2.2m (7ft) WNW swell with an 11-second period and a combined energy of 1086 (moderate wave energy). The wind stays clean, so it could be a fun, less hectic day for it. The morning is a bit smaller, around 1.1m (4ft).
So, to boil it all down: you’ve got a boring start, a wild, expert-only blast on the 8th and 9th, a possible bomb on the 10th that might be too big, and then a decent drop-off on the 11th. Don't hold your breath for the first week, but mark your calendar for that second weekend.
Stay safe, stay stoked.
Rusty
Short Range ForecastHeavy rain (total 50mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 29mm), heaviest during Thu night. Warm (max 29°C on Thu afternoon, min 26°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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) | NW 8 | NW 8 | NW 7 | WNW 6 | WNW 6 | WNW 5 | NW 5 | WSW 8 | WSW 8 | WSW 8 | W 10 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 7 | SW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 8 |
Wave Graph | |||||||||||||||||||||
18 | 9 | 2 | 4 | 3 | 3 | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | glassy | glassy | cross-off | on | cross-off | glassy | on | glassy | glassy | on | cross-on | cross-on | on | cross-on | cross-off | cross-on | glassy |
High Tide | 7:36AM1.02m | 8:16AM1.03m | 8:52AM1.03m | 9:27AM1.01m | 10:01AM0.96m | 10:35AM0.88m | |||||||||||||||
Low Tide | 5:38PM0.10m | 6:10PM0.10m | 6:38PM0.11m | 7:01PM0.13m | 7:15PM0.16m | 7:22PM0.21m | 7:21PM0.26m | ||||||||||||||
5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | |
— | 6:32 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | |
mm | 1 | 7 | 12 | 2 | 3 | 7 | — | 6 | 12 | — | 1 | 10 | — | 2 | 10 | — | 3 | 3 | — | 2 | 4 |
Temp °C | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 29 | 28 | 29 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 31 | 31 | 30 | 32 | 33 | 31 | 32 | 32 | 31 | 32 | 33 | 31 | 34 | 33 | 32 | 33 | 33 | 31 | 32 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | WSW 7 | WSW 7 | NW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 7 | SW 7 | WSW 8 | WSW 7 | WSW 7 | WSW 8 |
48 | 48 | 2 | 69 | 76 | 59 | 58 | 56 | 61 | 45 | 45 | 45 | 25 | 23 | 23 | 20 | 12 | 22 | 20 | 31 | 47 | |
Swell 2 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 7 | WNW 6 | WNW 6 | WNW 5 | NW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
18 | 9 | 2 | 4 | 3 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 9 | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 2 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSE 3 | S 3 | WSW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 | 2 | 117 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 548 | 548 | 81 | 81 | 81 | 81 | 94 | 81 | 81 | 846 | 81 | 81 | 94 | 98 | 81 | 2026 | 870 | 548 | 168 | 870 | 81 |
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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.










