Surf Forecasts:
Trestles (Uppers) surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 5AM (local time) - 2.5ft (0.8m), 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★+): Tuesday 18 Aug, 2AM (local time) - 2.5ft (0.8m), 14s period with SSW swell.
Best Forecast Surf Conditions for Trestles (Uppers) this week:
The surf forecast for Trestles (Uppers) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 0.8m 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 Trestles (Uppers) 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+) | 2AM (Tue 18th Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 5AM (Mon 24th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 8AM (Tue 18th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Trestles (Uppers) over the next 16 days.
The Lowdown
Alright, let’s get down to it. It’s Rusty here. This run is a slow starter, so don’t rush out the door.
Trestles (Uppers) is pretty much flat to tiny for the first week and a half. From the 17th through the 27th, we’re looking at waves between 1ft and 3ft, and a cross/onshore breeze is going to mess up the surface. It’s not worth the paddle. The water is warmer than usual for this time of year at 73°, so that’s a small silver lining.
We’re just waiting for the swell to fill in. The energy is weak to moderate, and there are long lulls between the sets. The period is okay, but there’s just nothing behind it. You’ll be scratching around for anything rideable.
The first real sign of life is on Saturday the 29th. The swell bumps up to 4ft, and the energy gets strong. The conditions look better with some lighter winds. It’s something to watch.
But the real standout is going to be Sunday the 30th. The swell is pushing 5ft from the SSW, with a long 16-second period. The energy is strong, and the offshore breeze will have the waves holding up clean and lined up. This is the pick of the fortnight. It’s going to be a bit much for the learners, but for everyone else, it’s game on.
After that, it fades back down through the start of September. Expect smaller waves and the onshore wind to ruin the fun again.
So, there you have it. A whole lot of waiting for that one good day on the 30th. Keep that one sacrosanct.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 26°C on Wed morning, min 21°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sat morning, min 22°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 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 | SW 18 | SSW 15 | SSW 14 | SW 19 | SW 18 | SW 18 |
Wave Graph  | ||||||||||||||||||||
 kJ | 264 | 261 | 232 | 243 | 275 | 377 | 314 | 246 | 239 | 236 | 173 | 139 | 137 | 98 | 90 | 188 | 218 | 127 | 155 | 213 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross-on | glassy | on | on | glassy | cross-on | cross-on | glassy | on | on | glassy | cross-on | cross-on | glassy | on | on | glassy |
High Tide | 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 | 8:24AM1.11m | 6:54PM1.59m | |||||||||
Low Tide | 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 | 12:49PM0.84m | 2:15AM0.03m | ||||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:27 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 22 | 25 | 25 | 23 | 26 | 26 | 24 | 26 | 25 | 23 | 26 | 26 | 24 | 27 | 27 | 25 | 27 | 27 | 24 |
Feels °C | 24 | 24 | 26 | 25 | 24 | 27 | 26 | 26 | 27 | 25 | 25 | 27 | 26 | 26 | 27 | 27 | 27 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | W 6 | W 6 | W 6 | W 6 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSW 15 | SSW 14 | SSW 13 | SSW 13 | SSW 14 |
| kJ | 264 | 42 | 49 | 52 | 53 | 377 | 314 | 246 | 239 | 236 | 173 | 139 | 137 | 98 | 90 | 188 | 218 | 99 | 135 | 213 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 14 | SSW 16 | SSW 17 | SSW 15 | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | SW 18 | SW 17 | WNW 11 | W 9 | W 10 | WNW 10 | SW 19 | SW 18 | SW 18 |
| kJ | 64 | 261 | 232 | 243 | 275 | 61 | 41 | 18 | 18 | 16 | 12 | 81 | 47 | 39 | 45 | 49 | 31 | 127 | 155 | 199 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 10 | SSW 13 | SSW 13 | S 9 | SW 20 | S 8 | SSW 18 | SW 19 | SW 19 | S 10 | W 6 | W 6 | SW 17 | SW 18 | SSW 12 | SW 19 | W 6 | W 6 | W 5 |
| kJ | 8 | 7 | 114 | 98 | 6 | 16 | 6 | 31 | 57 | 57 | 8 | 6 | 6 | 47 | 81 | 27 | 58 | 12 | 10 | 11 |
Wind waves Height (m) Direction Period (s) | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 86 | 0 | 86 | 86 | 0 | 74 | 86 | 0 | 64 | 89 | 0 | 83 | 86 | 0 | 83 | 86 | 0 | 86 | 86 | 0 |
Best forecast wave conditions in Orange County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Trestles (Uppers) Surf forecast
The above surf forecast table for Trestles (Uppers) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trestles (Uppers) can be found by selecting the local surf guide option on the grey menu. Our Trestles (Uppers) 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 (Uppers)) 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 (Uppers) 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 (Uppers) 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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