Surf Forecasts:
Trestles (Lowers) surf forecast from 18 Jul 2026:
- Best quality surf: Sunday 19 Jul, 8AM (local time) - 3ft (0.9m), 13s period, S swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 5AM (local time) - 5ft (1.6m), 12s period, SSW swell with 715 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 8PM (local time) - 2ft (0.6m), 18s period with SW 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 Saturday (Jul 18) at 8PM. The primary swell is predicted to be 0.6m and 18s period with a secondary swell of 0.6m and 11s. 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 1.6m 12s and forecast to arrive on Monday (Jul 20) at 5AM. 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+) | 8PM (Sat 18th Jul) | 2ft (0.6m) 18s |
| Best Surf | 8AM (Sun 19th Jul) | 3ft (0.9m) 13s |
| Most Powerful | 5AM (Mon 20th Jul) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Trestles (Lowers) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s coming up for the next couple of weeks. We’re looking at a slow start, but there’s some promise further out if you’re patient.
The water is running about 70° at Trestles (Lowers), which is a touch warmer than we’d normally expect for this time of year, so that’s a nice bonus.
Honestly, don’t rush down for the first few days. Friday the 17th is a write-off with tiny 2ft swell, cross-on winds, and weak energy (295). Saturday the 18th and Sunday the 19th aren’t much better. We’ve got a bit more size, up to 3ft, but the wind is messy and the wave energy is still moderate. It’s a poor start.
Monday the 20th through Wednesday the 22nd? Still not great. The swell bumps up to 5ft on Monday morning, but the period is short (12 seconds) and the wind is cross-on. By Wednesday, the wind is howling at 19 mph from the WNW, making the surface lumpy. The combined energy is moderate (440-500). This is more of a kite session than a paddle session.
Things start to get slightly more interesting around Thursday the 23rd and Friday the 24th. The swell is still small (3ft to 4ft), but the wind goes light and onshore, which is a step up. The energy is picking up too, hitting 1111 on Friday morning, which is moderate. It’s still marginal, but you’ll find a few rideable ones.
Now, the real standout is shaping up for the end of the month. Saturday the 26th of July through Monday the 28th of July is the window to circle. The swell is coming from the SSW, sizes are holding around 4ft to 5ft, and the period is long (17-19 seconds). That’s groundswell with proper energy. The combined energy is strong, hitting 1426 on Monday morning. The wind is light and onshore, which will keep the surface clean. For a spot like Trestles (Lowers), this is where the quality shows. The optimum swell direction is SW, and the SSW swell is close enough to fire it up. This is the best on offer.
The second week of the forecast, from the 29th of July onward, the swell drops back a bit. The energy stays moderate (781-1541), and the wind stays light, but the size and period dial back. It’s a quieter end to the run.
So, to sum it up: the first week is a slog with a few glimmers. The real window is the last weekend of July into Monday the 28th. That’s your best bet for clean, punchy waves at Trestles (Lowers). Keep your eyes on that.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Sun afternoon, min 20°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 21°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 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) | SW 18 | SW 15 | SW 18 | SW 18 | SW 16 | SW 17 | SW 17 | SSW 12 | SSW 14 | SW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 13 | SW 26 | SSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 103 | 136 | 366 | 379 | 127 | 334 | 429 | 703 | 367 | 362 | 334 | 519 | 474 | 559 | 437 | 394 | 316 | 225 | 199 | 257 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | on | cross-on | glassy | on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 11:54PM1.64m | 1:12PM1.41m | 00:44AM1.39m | 1:58PM1.43m | 1:45AM1.14m | 2:48PM1.44m | 3:09AM0.93m | 3:42PM1.45m | 5:11AM0.84m | 4:40PM1.47m | 7:14AM0.88m | 5:36PM1.51m | ||||||||
Low Tide | 5:59PM0.50m | 6:44AM-0.03m | 7:01PM0.53m | 7:19AM0.16m | 8:13PM0.55m | 7:54AM0.37m | 9:43PM0.52m | 8:31AM0.55m | 11:24PM0.42m | 9:18AM0.71m | 00:41AM0.28m | 10:30AM0.81m | 1:32AM0.15m | |||||||
 |  | | |  | | | | | | | | | | | | | | | | |
 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | 7:59 | — | — | 7:59 | — | — | 7:58 | — | — | 7:58 | — | — | 7:57 | — | — | 7:57 | — | — | 7:55 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 21 | 23 | 23 | 21 | 23 | 24 | 21 | 24 | 25 | 23 | 25 | 25 | 23 | 24 | 25 | 22 | 24 | 25 | 22 |
Feels °C | 24 | 22 | 24 | 24 | 23 | 24 | 24 | 22 | 24 | 24 | 23 | 24 | 23 | 22 | 24 | 24 | 22 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 15 | SW 18 | SW 18 | S 11 | SW 17 | S 12 | SSW 12 | S 11 | S 11 | SSW 10 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 13 | S 12 | W 6 |
| kJ | 103 | 136 | 366 | 379 | 81 | 334 | 409 | 703 | 319 | 247 | 131 | 519 | 474 | 559 | 437 | 394 | 316 | 225 | 199 | 47 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 6 | S 12 | S 12 | SW 16 | S 13 | SW 17 | WNW 15 | SSW 14 | SW 16 | SSW 16 | SSW 10 | S 9 | SSW 9 | SW 8 | S 14 | S 14 | SSW 14 | SSW 13 | SSW 13 |
| kJ | 23 | 12 | 69 | 67 | 127 | 163 | 429 | 42 | 367 | 362 | 334 | 125 | 57 | 52 | 31 | 104 | 142 | 163 | 158 | 257 |
Swell 3 Height (m) Direction Period (s) | SW 18 | S 12 | W 6 | SW 13 | S 13 | S 11 | WNW 15 | S 22 | WNW 14 | SW 13 | SW 13 | SW 12 | SW 9 | S 8 | S 8 | SW 7 | W 5 | WSW 6 | SW 26 | S 12 |
| kJ | 83 | 25 | 11 | 44 | 56 | 108 | 42 | 9 | 20 | 45 | 175 | 36 | 42 | 21 | 20 | 19 | 20 | 23 | 171 | 97 |
Wind waves Height (m) Direction Period (s) | S 3 | — | — | — | — | — | W 6 | — | W 4 | W 5 | — | — | — | WNW 4 | W 4 | W 4 | WNW 5 | W 6 | W 6 | — |
| kJ | 1 | — | — | — | — | — | 6 | — | 2 | 4 | — | — | — | 5 | 6 | 12 | 28 | 21 | 47 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 89 | 64 | 89 | 85 | 64 | 85 | 85 | 0 | 85 | 85 | 1 | 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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