Surf Forecasts:
Diamond Street surf forecast from 24 Jul 2026:
- Best quality surf: Saturday 25 Jul, 5AM (local time) - 3.5ft (1.0m), 21s period, SW swell with glassy winds.
- Most powerful swell: Friday 31 Jul, 8AM (local time) - 5.5ft (1.7m), 15s period, SSW swell with 1,275 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 5AM (local time) - 3.5ft (1.0m), 21s 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 Saturday (Jul 25) at 5AM. The primary swell is predicted to be 1.0m and 21s period with a secondary swell of 0.7m and 12s. 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 1.7m 15s and forecast to arrive on Friday (Jul 31) 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+) | 5AM (Sat 25th Jul) | 3.5ft (1.0m) 21s |
| Best Surf | 5AM (Sat 25th Jul) | 3.5ft (1.0m) 21s |
| Most Powerful | 8AM (Fri 31st Jul) | 5.5ft (1.7m) 15s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer down at Diamond Street.
We’ve got a bit of a slow start, but there’s something to work with if you’re patient. The first few days are nothing to write home about, but we’ll start seeing some action from Monday the 27th of July onwards. The water is sitting at 74°F – that’s a whopping 7°F warmer than usual for this time of year, so it’s feeling more like a tropical bath than a typical winter dip. That’s very unusual.
Right, the pick of the week lands on Friday the 31st of July. Friday morning is looking like the best we’ll see. The swell is 6ft from the SSW, with a period of 14 seconds – that’s proper groundswell energy. The combined energy is strong (1257), and with a light offshore wind from the W, the waves should be clean and lined up. That’s a standout. It’s not a huge wave, but it’s got enough push for a fun session. The 6ft is fine for most intermediates, but beginners might find it a bit much. The period is solid, so expect longer lulls between sets, making it easier to get out the back. The optimum swell direction is SSW, so that’s bang on.
Saturday the 1st of August is similar, with 6ft from the SSW and a 13-second period, and still with offshore wind in the morning. The energy is a bit lower (1060), but still good. This is a solid follow-up day.
After that, it fades out. Sunday the 2nd of August drops to 3ft, and from Monday the 3rd of August right through to the 8th, we’re looking at tiny, weak surf – mostly 1ft to 2ft. The energy is low (below 200), and the wind is mostly cross-onshore, so it’s choppy junk. That’s a long stretch of quiet days, over a week with nothing worth chasing.
Crowds are listed as “sometimes” at Diamond Street, so you might have company, but for the standout days, it’s worth it.
Stay safe out there.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat afternoon, min 20°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon morning, min 21°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | |||||||||||||||
AM | 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 24 | SW 24 | SW 21 | SW 21 | SW 21 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 16 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 16 | SW 15 | S 15 | SSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 541 | 271 | 647 | 647 | 513 | 945 | 716 | 609 | 694 | 901 | 511 | 717 | 951 | 897 | 767 | 580 | 573 | 649 | 544 | 429 | 1184 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 8:38AM1.01m | 6:37PM1.66m | 9:08AM1.08m | 7:21PM1.73m | 9:30AM1.13m | 7:59PM1.80m | 9:51AM1.17m | 8:34PM1.86m | 10:13AM1.21m | 9:08PM1.90m | 10:36AM1.25m | 9:39PM1.91m | 11:02AM1.30m | 10:11PM1.87m | |||||||
Low Tide | 12:24PM0.88m | 2:35AM0.03m | 1:20PM0.86m | 3:08AM-0.05m | 2:03PM0.80m | 3:38AM-0.11m | 2:40PM0.74m | 4:06AM-0.16m | 3:14PM0.68m | 4:33AM-0.18m | 3:47PM0.63m | 5:00AM-0.17m | 4:22PM0.59m | ||||||||
 | |  | |  |  | | | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — |
 | — | 7:52 | — | — | 7:52 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:50 | — | — | 7:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 21 | 22 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 22 | 22 | 21 | 22 | 23 | 22 |
Feels °C | 21 | 22 | 22 | 23 | 23 | 24 | 24 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 21 | 21 | 22 | 22 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 7 | SW 21 | SW 21 | SW 21 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 16 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 16 | SW 15 | S 15 | SSW 15 |
| kJ | 115 | 81 | 647 | 647 | 513 | 945 | 716 | 609 | 694 | 901 | 511 | 717 | 951 | 897 | 767 | 580 | 573 | 649 | 544 | 429 | 1184 |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | WNW 8 | WNW 8 | W 7 | W 8 | W 8 | W 9 | W 8 | W 8 | W 7 | S 14 | SW 15 | W 8 |
| kJ | 283 | 196 | 44 | 45 | 44 | 34 | 49 | 66 | 52 | 104 | 99 | 70 | 124 | 100 | 110 | 111 | 86 | 39 | 148 | 309 | 29 |
Swell 3 Height (m) Direction Period (s) | SW 24 | SW 24 | SSW 11 | S 10 | S 10 | S 10 | SSW 11 | SSW 11 | SSW 11 | S 11 | SW 19 | SW 9 | S 10 | S 9 | SSE 14 | SW 9 | SW 9 | SSE 14 | W 9 | W 9 | WNW 8 |
| kJ | 541 | 271 | 113 | 50 | 47 | 48 | 71 | 68 | 47 | 21 | 299 | 3 | 8 | 6 | 41 | 3 | 3 | 165 | 40 | 41 | 36 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 130 | 15 | 13 | 153 | 207 | 0 | 130 | 215 | 6 | 8 | 8 | 7 | 8 | 215 | 7 | 130 | 62 | 0 | 8 | 147 | 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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