
Surf Forecasts:
Diamond Street surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 5AM (local time) - 2ft (0.6m), 13s period, SW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 2AM (local time) - 3.5ft (1.1m), 17s period, SW swell with 742 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 5AM (local time) - 2ft (0.6m), 13s period with SW swell.
Best Forecast Surf Conditions for Diamond Street this week:
The surf forecast for Diamond Street over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 5AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.4m and 19s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Diamond Street in the next 16 days are 1.1m 17s and forecast to arrive on Saturday (Aug 15) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 11th Aug) | 2ft (0.6m) 13s |
| Best Surf | 5AM (Tue 11th Aug) | 2ft (0.6m) 13s |
| Most Powerful | 2AM (Sat 15th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright, I’ve had a look at that data, and I gotta be straight with you—it’s a tough read for us here at Diamond Street. We’ve got a solid 16-day window, but honestly, it’s looking pretty bleak for any decent paddle surfing. The whole period is plagued by poor surf conditions, with scores that are basically rock bottom. We’re looking at a long, dry spell with hardly anything to get excited about.
The skinny of it is: we’ve got small, wind-affected swell from the SW pretty much the whole way through. The wave energy is moderate at best, hovering around the 200s and 300s (moderate wave energy), with only a couple of brief moments pushing into the 500s (moderate wave energy) around Saturday the 15th and Sunday the 16th. Even then, it’s all cross-onshore wind, which is gonna leave things choppy and messy.
For the first week, from Monday the 10th right through to Friday the 21st, there’s just nothing that’s clean. The water temp on Monday afternoon the 10th was a balmy 76°, which is much warmer than normal for this time of year—a full 8° warmer than average. Weird, but that’s not gonna help the waves.
The best the swell gets is around Saturday the 15th and Sunday the 16th, where we might see a bump to 4ft from the SW, but the period is around 15-16 seconds. That’s a nice long groundswell, which is usually a good sign, but with a constant cross-onshore breeze it’ll be a bumpy, lumpy mess. A long period like that can also make a beach break like this fat and close out. Not worth the paddle out.
Look, this is a beginner-friendly spot that’s *fairly consistent*, but even the consistency is letting us down here. The wind is almost always from the W or WNW, onshore or cross-onshore, which just ruins what little swell we have. For kite-surfing, that steady side-wind might be fun, but for a regular surfer, it’s a no-go.
The second week, from the 22nd onward, it just gets smaller and weaker. The swell drops to 1ft to 2ft with energy falling into the low 200s. There’s really nothing to chase.
So, I hate to say it, but there are no standout days here. If you’re desperate, maybe keep an eye on Thursday morning the 13th or Saturday morning the 15th, where it was “marginal” instead of just “poor,” but I wouldn’t hold my breath. It’s one of those blank runs that’s sadly normal for this area when the wind doesn’t play ball.
Stay tuned, sometimes forecasts change, but right now, I’d say save your energy.
Rusty
Short Range ForecastSome drizzle, heaviest during Tue morning. Warm (max 23°C on Tue morning, min 20°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Sun morning, min 19°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 20 | SW 13 | SW 14 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
134 | 173 | 164 | 197 | 249 | 179 | 310 | 251 | 245 | 344 | 273 | 263 | 255 | 742 | 432 | 560 | 619 | 505 | 398 | 398 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | on | on | glassy | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 8:01PM2.13m | 9:38AM1.38m | 8:49PM2.17m | 10:11AM1.47m | 9:34PM2.13m | 10:44AM1.54m | 10:18PM2.01m | 11:17AM1.59m | 11:01PM1.82m | 11:51AM1.62m | 11:44PM1.58m | 12:25PM1.62m | 00:32AM1.32m | |||||||
Low Tide | 2:06PM0.65m | 3:31AM-0.40m | 2:57PM0.52m | 4:08AM-0.40m | 3:44PM0.42m | 4:44AM-0.33m | 4:30PM0.35m | 5:17AM-0.20m | 5:17PM0.32m | 5:49AM-0.03m | 6:06PM0.34m | 6:19AM0.18m | 6:59PM0.38m | |||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
7:38 | — | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:34 | — | — | 7:32 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 22 | 21 | 21 |
Feels °C | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 21 | 20 | 19 | 19 | 20 | 21 | 21 | 22 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SW 13 | SW 14 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
118 | 173 | 164 | 197 | 249 | 179 | 310 | 251 | 245 | 344 | 273 | 206 | 206 | 742 | 432 | 560 | 619 | 505 | 398 | 398 | |
Swell 2 Height (m) Direction Period (s) | SW 20 | SW 19 | SW 18 | WSW 14 | SSW 12 | SSW 12 | SW 13 | SSW 11 | SSW 11 | SSW 11 | SW 20 | SW 18 | SW 18 | W 4 | SW 13 | S 11 | S 11 | S 10 | S 10 | S 10 |
134 | 133 | 118 | 120 | 48 | 46 | 44 | 43 | 40 | 40 | 134 | 263 | 255 | 9 | 109 | 21 | 20 | 8 | 8 | 7 | |
Swell 3 Height (m) Direction Period (s) | SW 16 | WNW 10 | W 12 | SSW 12 | SW 13 | SW 13 | S 12 | SSW 11 | SW 12 | SSW 21 | SSW 10 | SSW 9 | SSW 9 | S 12 | W 5 | W 11 | WNW 13 | W 10 | W 11 | W 10 |
40 | 20 | 3 | 57 | 45 | 44 | 12 | 11 | 38 | 44 | 18 | 17 | 28 | 25 | 11 | 2 | 17 | 2 | 9 | 8 | |
Wind waves Height (m) Direction Period (s) | W 4 | — | W 8 | WNW 12 | — | — | W 10 | W 9 | — | W 8 | — | — | WNW 3 | — | WNW 5 | W 5 | W 5 | W 5 | WNW 5 | WNW 5 |
1 | — | 5 | 48 | — | — | 17 | 6 | — | 12 | — | — | 2 | — | 13 | 13 | 12 | 13 | 21 | 37 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 15 | 14 | 15 | 14 | 13 | 15 | 64 | 0 | 15 | 15 | 14 | 15 | 15 | 0 | 14 | 15 | 14 | 14 | 15 | 14 |
Best forecast wave conditions in San Diego County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
Information about the Diamond Street Surf forecast
The above surf forecast table for Diamond Street provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Diamond Street can be found by selecting the local surf guide option on the grey menu. Our Diamond Street 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 (Diamond Street) 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 Diamond Street 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.
Diamond Street is 9 km (6 miles) from San Diego. If you plan a vacation in San Diego County, look for hotels and other accommodation in San Diego. San Diego has rooms for a wide range of budgets as well as car hire and transport links.











