Surf Forecasts:
Diamond Street surf forecast from 1 Sep 2026:
- Best quality surf: Saturday 5 Sep, 11PM (local time) - 4.5ft (1.4m), 14s period, S swell with glassy winds.
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 6ft (1.9m), 14s period, SSW swell with 1,306 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 8AM (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 (Sep 04) at 8AM. The primary swell is predicted to be 1.1m and 17s period with a secondary swell of 0.7m and 6s. 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 1.9m 14s and forecast to arrive on Sunday (Sep 06) at 8PM. 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+) | 8AM (Fri 4th Sep) | 3.5ft (1.1m) 17s |
| Best Surf | 11PM (Sat 5th Sep) | 4.5ft (1.4m) 14s |
| Most Powerful | 8PM (Sun 6th Sep) | 6ft (1.9m) 14s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright, Rusty here, looking at the same stretch of beach, Diamond Street. It’s a long, quiet stretch ahead. The next week or so is looking pretty flat and sloppy.
We’ve got a solid run of onshore and cross-onshore winds that are keeping the surface messy. From Tuesday the 1st through Thursday the 3rd, it’s a write-off. We’re looking at tiny 2ft of weak, long-period swell from the SW, but the wind is rubbish. It’s a cross-onshore breeze at 9 to 12 mph, making for choppy, poor conditions. The combined energy is pretty weak (around 240 to 406) – just not worth paddling out.
Friday the 4th and Saturday the 5th we see a bit more push, with swell starting to nudge up to 4ft to 4ft. The combined energy gets into the moderate range (617 to 1034). The good news? We get a brief window of light wind on Friday morning and Saturday afternoon. But the swell is from the SSW with a period of 16 to 17 seconds, which is a nice long groundswell, but the wind is just not clean enough to polish it.
Sunday the 6th and Monday the 7th bring the biggest surf of the forecast – 6ft to 6ft from the SSW. The energy is moderate-to-strong (1005 to 1209). But again, the wind is a bust. It’s a cross-shore breeze at 6 to 12 mph, which isn’t ideal, and with this much power in a beach break setup, it’s going to be a bit of a bumpy mess. Might be more interesting for a kite than a surfboard.
After that, the swell drops off again. From Tuesday the 8th onward, we’re back to knee-to-waist high dribble. The energy plummets back to weak levels (under 500). The wind stays unfavorable.
The standout? There isn’t one. The data shows nothing that hits the quality mark. There is a small window on the morning of Friday the 5th with light wind and a 3ft SW swell – that’s about as good as it gets for beginners, but it’s a stretch. Conditions never truly align for a clean, rippable wave.
So, we’re looking at a solid 13-day stretch of poor-to-marginal surf starting now. Forecasts can change, but don't get your hopes up for Diamond Street right now. Stay tuned.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Tue morning, min 20°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 20°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | ||||||||||||||
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 13 | SW 13 | SW 13 | SW 13 | SSW 13 | SSW 13 | SW 17 | SW 15 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | S 14 | SSW 14 | SSW 13 | SSW 14 | SSW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 140 | 140 | 106 | 79 | 212 | 215 | 287 | 191 | 432 | 679 | 465 | 596 | 560 | 477 | 573 | 1207 | 989 | 1196 | 1211 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | glassy | cross-on | on | cross-off | cross | cross | glassy |
High Tide | 11:54PM1.32m | 12:06PM1.73m | 00:53AM1.10m | 12:49PM1.71m | 2:31AM0.91m | 1:49PM1.67m | 5:55AM0.91m | 3:16PM1.65m | 7:14AM1.05m | 4:51PM1.71m | 7:41AM1.19m | 6:06PM1.82m | |||||||
Low Tide | 5:55AM0.41m | 7:16PM0.29m | 6:20AM0.58m | 8:36PM0.30m | 6:45AM0.75m | 10:19PM0.26m | 7:16AM0.91m | 11:54PM0.12m | 10:35AM0.98m | 1:00AM-0.03m | 12:16PM0.87m | 1:48AM-0.16m | |||||||
 |  | | | | | | | | | | | | |  |  |  | | | |
 | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | — | 7:14 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:08 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 22 | 21 | 22 | 22 | 21 | 22 | 22 | 21 | 22 | 22 | 21 | 23 | 23 | 23 | 25 | 26 | 27 |
Feels °C | 21 | 21 | 19 | 20 | 22 | 20 | 20 | 22 | 20 | 20 | 22 | 21 | 22 | 23 | 23 | 24 | 24 | 26 | 30 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | W 5 | SSW 13 | SSW 13 | SSW 12 | SW 11 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | S 14 | SSW 14 | SSW 13 | SSW 14 | SSW 13 |
| kJ | 116 | 79 | 69 | 27 | 212 | 215 | 174 | 123 | 432 | 679 | 465 | 596 | 560 | 477 | 573 | 1207 | 989 | 1196 | 1211 |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | S 9 | W 6 | SW 16 | W 6 | WNW 6 | SW 10 | W 6 | WNW 6 | S 14 | S 14 | S 14 | SW 16 | W 13 | WSW 9 | W 12 | WNW 6 |
| kJ | 140 | 140 | 106 | 64 | 26 | 165 | 33 | 41 | 47 | 30 | 56 | 96 | 260 | 390 | 416 | 3 | 8 | 3 | 6 |
Swell 3 Height (m) Direction Period (s) | W 5 | W 5 | SW 18 | SW 13 | SW 16 | W 11 | SW 17 | SW 15 | SW 12 | SSW 10 | SW 11 | SW 9 | WNW 5 | WNW 6 | SW 10 | — | — | — | — |
| kJ | 20 | 21 | 50 | 79 | 132 | 2 | 287 | 191 | 74 | 35 | 96 | 23 | 20 | 18 | 28 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | W 6 | WNW 5 | — | W 6 | — | — | WNW 6 | — | — | WNW 6 | — | — | WNW 6 | WNW 5 | WNW 5 | WNW 4 | — |
| kJ | — | — | 23 | 39 | — | 24 | — | — | 50 | — | — | 37 | — | — | 17 | 9 | 10 | 10 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 14 | 14 | 15 | 14 | 14 | 15 | 8 | 14 | 15 | 13 | 15 | 14 | 0 | 14 | 62 | 0 | 14 | 15 | 0 |
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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