Surf Forecasts:
San Onofre surf forecast from 15 Aug 2026:
- Best quality surf: Monday 17 Aug, 2AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 5AM (local time) - 4ft (1.2m), 17s period, SSW swell with 762 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2AM (local time) - 3ft (0.9m), 14s period with SSW swell.
Best Forecast Surf Conditions for San Onofre this week:
The surf forecast for San Onofre over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 2AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.8m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at San Onofre in the next 16 days are 1.2m 17s and forecast to arrive on Saturday (Aug 15) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 17th Aug) | 3ft (0.9m) 14s |
| Best Surf | 2AM (Mon 17th Aug) | 3ft (0.9m) 14s |
| Most Powerful | 5AM (Sat 15th Aug) | 4ft (1.2m) 17s |
Table - best surf conditions forecast for San Onofre over the next 16 days.
The Lowdown
Alright folks, Rusty here with the long-range look for our local zone. Let's get into it.
Right off the bat, the first week and a half is pretty flat and messy. We've got small swell from the 15th of August right through to the morning of the 23rd, but honestly, the wind is onshore or cross-onshore for most of it, and the wave heights are barely crawling. It’s not worth getting wet—you'll be fighting chop for nothing. This is a solid stretch of dud days, so don't bother.
The first real glimmer of hope shows up on Sunday afternoon the 23rd of August at San Onofre (San Onofre). It’s tiny, only 2ft of swell from the SW, but here’s the thing: the wind goes totally glassy. For a spot like San Onofre, which is a consistent beginner-friendly beach and point setup that's exposed to the SW, that glassy window is a rare treat. The water temperature is about average for the time of year, so you won't need a thick suit. The combined wave energy is weak (281), so it'll be small and clean, perfect for a longboard or a foamie. Keep in mind, this spot does draw a crowd often, so a Sunday afternoon might have a few heads, but with these tiny conditions, the more serious crew will be elsewhere.
The real standout, the one you need to circle on the calendar, comes on Tuesday the 25th of August. Swell jumps up to 4ft from the S in the morning, with a period of 15 seconds. That's proper long-period groundswell. The combined energy bumps up to a solid moderate 1066. Winds are light and cross-onshore from the SW, which at San Onofre, with that SSW exposure, will keep things reasonably clean. The condition note does say "marginal surf forecast or questionable tide", so you’ll need to pick your window, but this is the best energy we see in the whole run. For the more advanced crew, the afternoon of the 25th sees the swell punch up to 5ft from the S with an even stronger energy reading of 1497. However, that afternoon brings rain showers and light onshore wind, so the morning is your cleaner bet. For beginners, 4ft is manageable, but when it hits 5ft, it starts to push that beginner-friendly limit.
The following days from the 26th to the 29th keep moderate-sized swell in the 5ft to 7ft range, mostly from the S and SSW, with a period dropping to 14 seconds. The winds stay light, but mostly onshore or cross-onshore. The energy remains strong (up to 1802 on the 26th), but the quality is marginal at best due to the wind and tide issues. By the 30th, the swell drops back down, and a moderate cross-shore wind kicks up, making it choppy again.
So, to sum it up: keep your gear dry until the 23rd afternoon for a glassy but tiny session, then target the morning of the 25th for the best combo of size, power, and cleaner conditions.
Stay stoked and don't get skunked.
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 19°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu afternoon, min 22°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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) | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||
807 | 417 | 683 | 666 | 499 | 443 | 367 | 330 | 264 | 257 | 232 | 240 | 272 | 377 | 387 | 246 | 236 | 236 | 175 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | on | cross-on | on | cross-on | glassy | on | cross-on | glassy | on | on | glassy | on | on | glassy | on | on | glassy |
High Tide | 10:48PM1.74m | 11:37AM1.55m | 11:31PM1.52m | 12:11PM1.55m | 00:18AM1.28m | 12:47PM1.51m | 1:15AM1.05m | 1:28PM1.45m | 2:46AM0.87m | 2:22PM1.40m | 3:41PM1.37m | ||||||||
Low Tide | 5:23AM-0.01m | 5:38PM0.33m | 5:51AM0.17m | 6:30PM0.37m | 6:17AM0.37m | 7:30PM0.43m | 6:40AM0.56m | 8:50PM0.46m | 6:55AM0.73m | 10:43PM0.43m | 00:16AM0.32m | ||||||||
— | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | |
— | — | 7:36 | — | — | 7:35 | — | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 22 | 22 | 20 | 23 | 24 | 21 | 24 | 25 | 23 | 25 | 26 | 23 | 26 | 26 | 24 | 27 | 28 | 25 |
Feels °C | 21 | 22 | 21 | 21 | 23 | 24 | 21 | 24 | 24 | 25 | 26 | 26 | 25 | 27 | 27 | 27 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | W 7 | W 7 | W 8 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
807 | 417 | 683 | 666 | 499 | 443 | 367 | 330 | 264 | 71 | 65 | 65 | 272 | 377 | 387 | 246 | 236 | 236 | 175 | |
Swell 2 Height (m) Direction Period (s) | S 12 | SW 14 | S 11 | W 5 | W 5 | S 10 | W 6 | W 6 | SSW 18 | SSW 14 | SSW 16 | SSW 16 | W 9 | W 8 | W 8 | W 6 | W 6 | WSW 19 | W 6 |
70 | 191 | 21 | 11 | 8 | 8 | 39 | 37 | 63 | 257 | 232 | 240 | 38 | 35 | 34 | 12 | 12 | 35 | 12 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | W 11 | S 11 | S 10 | W 10 | S 10 | S 10 | S 10 | S 10 | SSW 13 | SSW 13 | SW 19 | SW 20 | W 14 | SW 18 | SW 19 | WNW 13 | WNW 12 |
2 | 2 | 2 | 20 | 19 | 2 | 8 | 8 | 8 | 2 | 114 | 98 | 15 | 16 | 4 | 13 | 57 | 16 | 13 | |
Wind waves Height (m) Direction Period (s) | — | SW 11 | W 3 | — | W 5 | W 5 | — | — | W 6 | — | — | — | — | — | — | — | — | W 6 | — |
— | 58 | 5 | — | 13 | 18 | — | — | 39 | — | — | — | — | — | — | — | — | 12 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 83 | 83 | 15 | 83 | 83 | 0 | 83 | 83 | 0 | 83 | 83 | 0 | 83 | 83 | 0 | 77 | 83 | 0 |
Best forecast wave conditions in Orange County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the San Onofre Surf forecast
The above surf forecast table for San Onofre provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at San Onofre can be found by selecting the local surf guide option on the grey menu. Our San Onofre 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 Onofre) 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 Onofre 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 Onofre is 8 km (5 miles) from San Clemente. If you plan a vacation in Orange County, look for hotels and other accommodation in San Clemente. San Clemente has rooms for a wide range of budgets as well as car hire and transport links.











