Surf Forecasts:
Diamond Street surf forecast from 29 Aug 2026:
- Best quality surf: Friday 28 Aug, 11PM (local time) - 3.5ft (1.1m), 17s period, SW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 2AM (local time) - 3.5ft (1.1m), 17s period, SW swell with 763 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 11PM (local time) - 3.5ft (1.1m), 17s 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 Friday (Aug 28) at 11PM. The primary swell is predicted to be 1.1m and 17s period with a secondary swell of 0.6m and 8s. 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 29) 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+) | 11PM (Fri 28th Aug) | 3.5ft (1.1m) 17s |
| Best Surf | 11PM (Fri 28th Aug) | 3.5ft (1.1m) 17s |
| Most Powerful | 2AM (Sat 29th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright, Rusty here, checkin' in. Gotta be straight with you – the next couple of weeks are lookin' pretty grim for a proper paddle. There's some small waves, sure, but the conditions just aren't comin' together for a good session.
I'm lookin' at Diamond Street, and the whole 16-day window is a bust. The first few days are a write-off. Friday the 28th of August has a tiny 2ft SW groundswell with a nice 16-second period, but the water temp is a balmy 75° – that's a massive 7° warmer than usual, super weird for this time of year. But the wave energy is weak (325) and the report just says "marginal" – not worth paddling out for.
The only time the swell even gets close to 5ft is on the 3rd of September with a 5ft SW swell, but the wind is messin' it up. It's a 12-second period, cross-onshore at 9 mph, making it choppy. The energy is moderate (737), but with that wind, it's just messy. The swell dips again after that, and the wind stays in a bad direction, either cross-onshore or onshore, keeping the surface all chopped up.
There's a bit of a spike on the 4th of September with a 4ft SW swell and a long 16-second period, and the energy is strong (1021), but once again, the wind is cross-onshore. It's just not clean. A long-period swell like that wants a point break or a reef, not a beach break with an onshore breeze.
From the 6th of September right through to the 12th, it's a long stretch of poor surf conditions. The swell is tiny, mostly under 3ft, and the wind is never on our side. It's a flat run of dead days. The forecast confidence is solid for the near term, but it's not good news. For a place that's fairly consistent, this is a real bummer. The only silver lining is that for a break that's only exposed to a W swell, the SW swell direction is not ideal, so this blank run is a bit more normal for Diamond Street.
Honestly, the setup looks more interesting for a kite surfer than a paddle surfer on most of these days, especially with the consistent cross-onshore winds.
Rusty, out.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 21°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Wed afternoon, min 22°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 13 | SW 12 | SW 15 | SW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 165 | 763 | 581 | 653 | 612 | 424 | 407 | 297 | 284 | 202 | 142 | 113 | 289 | 344 | 440 | 365 | 640 | 627 | 492 | 499 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross |
High Tide | 9:54PM1.81m | 10:38AM1.60m | 10:30PM1.69m | 11:04AM1.66m | 11:09PM1.52m | 11:33AM1.71m | 11:54PM1.32m | 12:06PM1.73m | 00:53AM1.10m | 12:49PM1.71m | 2:31AM0.91m | 1:49PM1.67m | ||||||||
Low Tide | 4:09PM0.37m | 4:43AM-0.01m | 4:47PM0.31m | 5:07AM0.10m | 5:29PM0.28m | 5:31AM0.24m | 6:17PM0.27m | 5:55AM0.41m | 7:16PM0.29m | 6:20AM0.58m | 8:36PM0.30m | 6:45AM0.75m | 10:19PM0.26m | |||||||
 |  | | | | | | | | | | | |  |  |  | | | | | |
 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — |
 | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:12 | — | — | 7:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 26 | 25 | 23 | 24 | 23 | 22 | 22 | 22 | 22 | 24 | 24 | 24 | 24 | 25 | 24 | 25 | 25 | 24 |
Feels °C | 27 | 28 | 27 | 25 | 24 | 24 | 22 | 22 | 21 | 20 | 21 | 23 | 22 | 23 | 23 | 23 | 22 | 24 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | S 8 | SW 17 | SW 16 | SW 16 | SW 16 | WNW 8 | W 8 | W 7 | WNW 7 | SW 13 | S 11 | S 11 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 13 | SW 12 | SW 12 | SW 13 |
| kJ | 51 | 763 | 581 | 653 | 612 | 197 | 149 | 131 | 79 | 202 | 116 | 112 | 289 | 344 | 440 | 365 | 640 | 627 | 325 | 464 |
Swell 2 Height (m) Direction Period (s) | SW 16 | S 8 | WNW 7 | WNW 7 | W 8 | SW 15 | SW 14 | SW 14 | SW 14 | S 12 | W 6 | SW 13 | SW 18 | SW 18 | SW 16 | SW 16 | W 5 | WNW 5 | SW 15 | SW 17 |
| kJ | 165 | 34 | 52 | 71 | 138 | 424 | 407 | 297 | 284 | 95 | 22 | 113 | 50 | 109 | 169 | 208 | 11 | 8 | 492 | 499 |
Swell 3 Height (m) Direction Period (s) | SW 13 | W 7 | SSW 8 | SSW 8 | S 7 | S 8 | S 12 | S 12 | S 12 | WSW 19 | SW 13 | SW 18 | W 10 | W 9 | W 9 | W 9 | W 10 | SW 20 | W 6 | W 5 |
| kJ | 109 | 26 | 20 | 19 | 4 | 5 | 44 | 75 | 141 | 35 | 142 | 50 | 2 | 2 | 7 | 7 | 2 | 102 | 17 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WNW 6 | — | W 5 | W 5 | W 5 | W 5 | W 5 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 53 | — | 15 | 20 | 17 | 13 | 13 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 15 | 0 | 15 | 14 | 15 | 15 | 215 | 14 | 14 | 14 | 14 | 14 | 15 | 0 | 0 | 15 | 14 | 14 | 15 | 14 |
Best forecast wave conditions in San Diego County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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.
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