Surf Forecasts:
Trestles (Lowers) surf forecast from 20 Aug 2026:
- Best quality surf: Monday 24 Aug, 5AM (local time) - 2ft (0.6m), 18s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 2AM (local time) - 2.5ft (0.7m), 17s period, SW swell with 273 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5AM (local time) - 2.5ft (0.8m), 14s period with SSW swell.
Best Forecast Surf Conditions for Trestles (Lowers) this week:
The surf forecast for Trestles (Lowers) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 5AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.7m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trestles (Lowers) in the next 16 days are 0.7m 17s and forecast to arrive on Tuesday (Aug 25) at 2AM. Winds are predicted to be glassy at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 20th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 5AM (Mon 24th Aug) | 2ft (0.6m) 18s |
| Most Powerful | 2AM (Tue 25th Aug) | 2.5ft (0.7m) 17s |
Table - best surf conditions forecast for Trestles (Lowers) over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what we've got on the cards for the next couple of weeks. It’s a slow start, a real slow burn. We’re looking at a stretch of small, poor-quality surf for the first week, so you might want to sort out your gear or fix that ding before you paddle out. The saving grace is that it’s not flat; there’s always a little bump to be found, but it’s not going to be pretty.
The first real action doesn't show any promise until around the 27th or 28th. The swell direction is looking okay, from the SSW, but the size is still way down. It's only around 2.3ft to 2.6ft at Trestles (Lowers) on the morning of the 27th, with the energy still weak at 313. It’s not going to get the heart racing, but the wind is light and offshore, so it might be a glassy little ripple for someone on a longboard.
The standout period is shaping up for the 28th into the 29th. On Friday the 28th morning, the swell fills in a touch to 2.6ft at 19 seconds from the SSW. That's proper groundswell. And the energy jumps up to 734, which is a solid kick. Winds are light offshore, so expect clean lines, even if the size is still on the small side. This is our first real window.
Then, Saturday the 29th morning looks like the best of the bunch. The swell builds to 3.3ft from the SSW with a 17 second period, and the energy is up at 773. Still light offshore winds too. This is the one. It’s not huge, but it’s clean and consistent, which makes it the pick of the period. The afternoon sees a slight bump in size to 3.9ft, but the wind switches to a cross-on breeze, which will chop it up a bit.
After that, it fades back into the mediocre side of things. The first week is mostly poor surf, with light cross-onshore winds and tiny swell. There’s a lot of marginal days with questionable conditions. It’s not looking like a classic run, but there's a glimmer of hope for those two mornings.
One thing to keep an eye on: Trestles is a beach and reef set-up that’s very consistent, so even if it’s small, there will be something to ride. The water temp is about average for this time of year, so no drama there.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 21°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 15 | SSW 14 | SW 19 | SW 18 | SSW 14 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 249 | 239 | 236 | 175 | 156 | 137 | 98 | 92 | 167 | 218 | 177 | 155 | 269 | 197 | 179 | 273 | 264 | 163 | 203 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | on | cross-on | on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 3:41PM1.37m | 8:16AM0.98m | 5:05PM1.40m | 8:13AM1.05m | 6:07PM1.49m | 8:24AM1.11m | 6:54PM1.59m | 8:38AM1.17m | 7:31PM1.68m | 8:56AM1.23m | 8:05PM1.75m | ||||||||
Low Tide | 10:43PM0.43m | 00:16AM0.32m | 9:51AM0.97m | 1:08AM0.21m | 11:54AM0.93m | 1:45AM0.11m | 12:49PM0.84m | 2:15AM0.03m | 1:27PM0.73m | 2:41AM-0.02m | 2:01PM0.63m | 3:06AM-0.06m | |||||||
 |  |  | | | | | | | | | | | | | | | | | |
 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:27 | — | — | 7:25 | — | — | 7:23 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 24 | 24 | 23 | 26 | 25 | 23 | 26 | 26 | 24 | 26 | 27 | 23 | 26 | 27 | 23 | 26 | 26 | 23 |
Feels °C | 25 | 25 | 25 | 24 | 27 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 24 | 27 | 26 | 24 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | W 6 | SSW 15 | SSW 14 | W 6 | SSW 13 | SSW 14 | W 6 | SW 17 | W 6 | SW 16 | SW 16 | W 6 |
| kJ | 249 | 239 | 236 | 175 | 156 | 137 | 98 | 31 | 167 | 218 | 41 | 98 | 269 | 37 | 179 | 59 | 264 | 163 | 61 |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | SSW 13 | W 6 | W 6 | SSW 13 | SW 18 | W 5 | SW 18 | SSW 12 | SW 17 | S 13 | S 13 | S 13 |
| kJ | 33 | 27 | 18 | 10 | 19 | 11 | 6 | 92 | 19 | 17 | 99 | 155 | 21 | 197 | 85 | 273 | 126 | 87 | 123 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 19 | WSW 19 | S 10 | SW 18 | SSW 16 | SW 18 | SW 18 | SSW 12 | SW 19 | SW 19 | SSW 16 | SW 18 | SSW 12 | S 14 | S 13 | S 10 | S 10 | SW 16 |
| kJ | 13 | 57 | 35 | 8 | 81 | 51 | 49 | 81 | 56 | 58 | 177 | 84 | 199 | 89 | 66 | 126 | 8 | 2 | 203 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | — | W 6 | — | W 6 | W 6 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 26 | — | — | 36 | — | 51 | 60 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 83 | 85 | 34 | 83 | 85 | 0 | 85 | 85 | 0 | 85 | 85 | 0 | 85 | 85 | 0 | 85 | 85 | 0 |
Best forecast wave conditions in Orange County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Trestles (Lowers) Surf forecast
The above surf forecast table for Trestles (Lowers) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trestles (Lowers) can be found by selecting the local surf guide option on the grey menu. Our Trestles (Lowers) 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 (Trestles (Lowers)) 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 Trestles (Lowers) 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.
Trestles (Lowers) is 6 km (4 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.
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