Surf Forecasts:
Diamond Street surf forecast from 11 Jul 2026:
- Best quality surf: Saturday 18 Jul, 8AM (local time) - 2ft (0.6m), 20s period, S swell with glassy winds.
- Most powerful swell: Saturday 18 Jul, 11AM (local time) - 2.5ft (0.8m), 19s period, S swell with 444 kJ wave energy.
- Next surfable swell (1★+): Sunday 12 Jul, 5AM (local time) - 3ft (0.9m), 14s 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 Sunday (Jul 12) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.4m 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 0.8m 19s and forecast to arrive on Saturday (Jul 18) at 11AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 12th Jul) | 3ft (0.9m) 14s |
| Best Surf | 8AM (Sat 18th Jul) | 2ft (0.6m) 20s |
| Most Powerful | 11AM (Sat 18th Jul) | 2.5ft (0.8m) 19s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
Alright folks, Rusty here. Let's have a look at what Diamond Street is serving up.
Right off the bat, I gotta be straight with you – the next week and a half is looking pretty average. The water is sitting at 71°, which is much warmer than normal for this time of year, so you might not need the thickest wetsuit, but the surf quality is just not there. We’ve got a persistent SW swell, running around 2ft to 3ft, but the wind is constantly cross-onshore or onshore, chopping it up. The wave energy is moderate, but it’s just not translating into anything rideable. Conditions are consistently poor or marginal, and the wind is just never friendly enough to clean it up. It’s a tough stretch.
We finally get a bit of a pulse around Saturday, July 18th. The swell bumps up to 4ft from the South, and the energy jumps. It’s still a bit of a gamble, but it’s the closest we get to a decent window. The period is 16 seconds, so it’s a long-period groundswell, which for a beach break like this might make it a bit straight and walled, but it brings some energy. Those morning sessions on the 18th and 19th are your best bet, but keep expectations low.
Honestly, if you’re really keen, the standout is the stretch from Saturday the 18th morning through Sunday the 19th. The swell is a touch bigger (4ft to 4ft), and while the wind is still cross-onshore, it’s light. It’s not a classic, but it’s the only pulse that breaks the monotony. The rest of the 16-day window is a write-off with poor conditions.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 17°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Wed morning, min 20°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||
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 15 | SW 15 | SW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 18 | SW 18 | SW 17 | SW 16 | WSW 16 | SW 16 | SW 16 | SW 19 | SW 19 | SW 18 | WSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 314 | 314 | 288 | 362 | 367 | 318 | 277 | 140 | 183 | 136 | 154 | 249 | 148 | 130 | 171 | 203 | 121 | 129 | 181 | 103 | 142 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | on | glassy |
High Tide | 8:29AM1.06m | 7:12PM2.07m | 9:18AM1.16m | 8:04PM2.17m | 10:01AM1.23m | 8:55PM2.23m | 10:42AM1.30m | 9:43PM2.21m | 11:22AM1.36m | 10:31PM2.12m | 12:03PM1.40m | 11:18PM1.95m | 12:44PM1.44m | 00:05AM1.71m | |||||||
Low Tide | 1:00PM0.72m | 3:01AM-0.37m | 2:00PM0.68m | 3:46AM-0.49m | 2:55PM0.62m | 4:30AM-0.53m | 3:48PM0.57m | 5:12AM-0.50m | 4:39PM0.53m | 5:53AM-0.40m | 5:32PM0.52m | 6:33AM-0.24m | 6:28PM0.53m | ||||||||
 |  |  | | | |  | |  | | | | | | | | | | | | | |
 | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — |
 | — | 7:59 | — | — | 7:59 | — | — | 7:58 | — | — | 7:58 | — | — | 7:58 | — | — | 7:57 | — | — | 7:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 18 | 20 | 20 | 20 | 22 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 22 | 22 | 21 | 20 | 21 | 21 | 20 |
Feels °C | 19 | 18 | 18 | 20 | 19 | 21 | 22 | 20 | 21 | 22 | 21 | 23 | 23 | 23 | 22 | 22 | 20 | 20 | 21 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SSW 13 | WNW 7 | WNW 8 | W 7 | W 8 | W 8 | W 7 | W 7 | W 6 | WSW 15 |
| kJ | 314 | 314 | 288 | 362 | 367 | 318 | 277 | 140 | 183 | 136 | 79 | 113 | 86 | 94 | 86 | 124 | 98 | 67 | 45 | 31 | 142 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | W 9 | WNW 8 | WNW 8 | W 9 | W 9 | W 9 | S 14 | SW 19 | SW 19 | SW 18 | SW 18 | SW 12 | SW 16 | WSW 16 | SW 16 | SW 16 | WSW 15 | SW 14 | SW 14 | W 6 |
| kJ | 28 | 24 | 23 | 14 | 14 | 14 | 14 | 101 | 133 | 93 | 154 | 249 | 77 | 130 | 171 | 203 | 121 | 121 | 103 | 103 | 19 |
Swell 3 Height (m) Direction Period (s) | SSW 20 | S 20 | SSW 18 | W 24 | SW 21 | WSW 21 | SW 21 | SW 19 | WNW 10 | S 12 | SSW 13 | W 5 | SW 17 | SSW 12 | SSW 12 | SW 12 | SSW 12 | SW 19 | SW 19 | SW 18 | SW 18 |
| kJ | 37 | 7 | 60 | 11 | 18 | 45 | 18 | 96 | 9 | 26 | 53 | 7 | 148 | 57 | 56 | 36 | 27 | 129 | 181 | 83 | 49 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 9 | — | WNW 9 | WNW 9 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 7 | — | 17 | 17 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 45 | 13 | 15 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 6 | 15 | 15 | 6 | 130 | 62 | 6 | 153 | 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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