Surf Forecasts:
Trestles (Lowers) surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 8AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 8AM (local time) - 3ft (0.9m), 16s period, SSW swell with 402 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 8AM (local time) - 3ft (0.9m), 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 Monday (Aug 17) at 8AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.6m 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 0.9m 16s and forecast to arrive on Tuesday (Aug 18) at 8AM. 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+) | 8AM (Mon 17th Aug) | 3ft (0.9m) 14s |
| Best Surf | 8AM (Mon 17th Aug) | 3ft (0.9m) 14s |
| Most Powerful | 8AM (Tue 18th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Trestles (Lowers) over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at the next couple of weeks at Trestles (Lowers). We’ve got a bit of a mixed bag coming up, so let’s get into it.
Right off the bat, it’s looking pretty quiet. The early part of the week isn’t offering much to get excited about. We’ve got some small, weak energy rolling in – the combined swell energy is only around 528 (moderate) on Sunday morning, but it drops fast. The wind is cross-on from the West, which is putting a bit of a chop on things, and the swell is small, around 3ft from the SSW. It’s a long-period groundswell of 16 seconds, which would usually be a good sign, but the size just isn’t there for Trestles to really fire. The water is a notable 74° – that’s about 7° warmer than usual for this time of year, which is pretty unusual, so you might not need the thickest wetsuit.
Monday and Tuesday look even smaller and more marginal, with the wind staying unfriendly. Honestly, it’s a bit of a flat spell with poor conditions for the first several days. There’s no real standout option here until we get further out.
Looking ahead, there’s a flicker of hope towards the end of the month. On Wednesday the 26th of August, there’s a brief moment in the afternoon that could be worth a look. The wind is forecast to go glassy from the WNW, which is a huge positive. The swell is only 2ft from the SW with a period of 16 seconds, and the combined energy is a weak 299. It’s not going to be big, but if that glass-off happens, it’ll be the cleanest the lineup will be all period. Don’t expect it to be pumping, but for a sneaky cruise on a longboard, it might be your best bet.
The last few days of the month see a slight bump in energy. On Saturday the 29th of August, the combined swell energy climbs to 600 (moderate) by the afternoon with a 3ft swell from the SSW, but the wind is a moderate cross-shore from the WNW, making things choppy. It’s not ideal. The following Sunday the 30th of August morning has a better wind direction, onshore from the SW, with the same 3ft swell, but the energy is still moderate.
Overall, it’s a lean forecast for Trestles. The first week is mostly a write-off unless you’re desperate, and the second week only offers a couple of small windows, like that glassy Wednesday afternoon. For the best of a quiet bunch, I’d pencil in the afternoon of Wednesday the 26th of August for the cleanest, albeit small, conditions. Keep the expectations low and you might snag a fun wave or two.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 19°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 23°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 |
Wave Graph | |||||||||||||||||||||
499 | 443 | 367 | 330 | 264 | 257 | 232 | 243 | 272 | 377 | 387 | 249 | 236 | 236 | 175 | 156 | 137 | 98 | 92 | 167 | 218 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on | glassy | cross-on | on | glassy | on | on | cross | on | on | glassy | on | cross-on | cross |
High Tide | 12:11PM1.55m | 00:18AM1.28m | 12:47PM1.51m | 1:15AM1.05m | 1:28PM1.45m | 2:46AM0.87m | 2:22PM1.40m | 3:41PM1.37m | 8:16AM0.98m | 5:05PM1.40m | 8:13AM1.05m | 6:07PM1.49m | |||||||||
Low Tide | 6:30PM0.37m | 6:17AM0.37m | 7:30PM0.43m | 6:40AM0.56m | 8:50PM0.46m | 6:55AM0.73m | 10:43PM0.43m | 00:16AM0.32m | 9:51AM0.97m | 1:08AM0.21m | 11:54AM0.93m | 1:45AM0.11m | |||||||||
6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 7:35 | — | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 22 | 22 | 21 | 24 | 25 | 22 | 25 | 25 | 23 | 25 | 26 | 23 | 25 | 25 | 23 | 25 | 26 | 24 | 27 | 26 | 25 |
Feels °C | 23 | 21 | 21 | 24 | 24 | 23 | 26 | 25 | 25 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 28 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | W 7 | W 7 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 |
499 | 443 | 367 | 330 | 264 | 257 | 58 | 42 | 272 | 377 | 387 | 249 | 236 | 236 | 175 | 156 | 137 | 98 | 92 | 167 | 218 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | W 5 | W 6 | SSW 18 | W 6 | SSW 16 | SSW 17 | W 6 | W 6 | W 6 | W 5 | W 6 | W 6 | W 5 | W 6 | W 6 | SW 18 | W 6 | W 6 | W 10 |
19 | 8 | 19 | 25 | 63 | 48 | 232 | 243 | 26 | 41 | 26 | 14 | 16 | 15 | 8 | 10 | 10 | 49 | 12 | 11 | 31 | |
Swell 3 Height (m) Direction Period (s) | W 10 | W 10 | S 10 | S 10 | S 10 | S 10 | SSW 13 | SSW 13 | WNW 8 | SW 20 | W 14 | SW 18 | SW 19 | WSW 19 | WNW 12 | SW 18 | SW 18 | SSW 16 | SW 18 | SSW 12 | SW 19 |
2 | 2 | 8 | 8 | 8 | 2 | 114 | 98 | 13 | 16 | 4 | 13 | 57 | 35 | 14 | 81 | 49 | 51 | 51 | 27 | 58 | |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | — | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8 | 13 | — | — | 36 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 85 | 85 | 85 | 85 | 85 | 0 | 85 | 130 | 0 | 85 | 85 | 0 | 85 | 152 | 19 | 83 | 133 | 0 | 83 | 85 | 3 |
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.











