Surf Forecasts:
Diamond Street surf forecast from 4 Aug 2026:
- Best quality surf: Friday 7 Aug, 5AM (local time) - 2ft (0.6m), 13s period, SW swell with glassy winds.
- Most powerful swell: Saturday 8 Aug, 11PM (local time) - 3ft (0.9m), 16s period, SW swell with 371 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 5AM (local time) - 2ft (0.6m), 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 Thursday (Aug 06) at 5AM. The primary swell is predicted to be 0.6m and 14s period with a secondary swell of 0.4m and 5s. 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 0.9m 16s and forecast to arrive on Saturday (Aug 08) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 6th Aug) | 2ft (0.6m) 14s |
| Best Surf | 5AM (Fri 7th Aug) | 2ft (0.6m) 13s |
| Most Powerful | 11PM (Sat 8th Aug) | 3ft (0.9m) 16s |
Table - best surf conditions forecast for Diamond Street over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this 16-day stretch for Diamond Street is a tough one. We've got a real dry spell on our hands, with almost no surf worth paddling out for. The first recommendation doesn't even pop up until nearly the end of the period, so there's a long, boring gap ahead.
Basically, from the start of August right through to Thursday the 15th, it's a whole lot of nothing. Small, weak swells and mostly cross-onshore winds keep things messy. Wave energy is weak to moderate at best, with combined energy values sitting in the low hundreds, barely cracking 200 on a few afternoons. You'd be fighting chop and looking at waist-high slop. Nothing to get excited about.
Now, let's talk about the one bright spot that shows up way down the line. On Friday the 16th of August, things finally start to look interesting. We get a pulse of swell from the SW, and the combined energy jumps up to 580 (strong), with the swell holding around 2 ft to 3 ft. The better call is the Saturday the 17th of August morning, when we see a bump up to 4 ft from the SW with a period of 16 seconds. That's a proper groundswell with some grunt. The combined energy sits at 602 (strong). It's not perfect though – the wind is cross-on from the WNW at 9 mph, so it won't be glassy, but it's rideable with a bit of power. This is the one and only standout, but it's for experienced surfers only – that 4 ft swell with long period will push through fast and could be tricky for beginners.
The water temperature is a real story here – on that first Tuesday it's sitting at 75°F, which is a massive 8°F warmer than usual for the time of year. That’s very unusual, so you might not need a spring suit at all. It's been a weird season.
So, heading into the second week, keep your eye on that Saturday the 17th window. It’s not a classic day, but it's the only shot at a decent wave. Outside of that, it's pretty flat and choppy. For a spot that's fairly consistent, this blank run is a bit of a stinker, but it won't stay poor forever. The wind direction at Diamond Street never goes clean offshore, so we're always battling a cross or cross-on breeze here – that's just the setup.
Signing off,
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Thu morning, min 20°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Fri morning, min 21°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 | WSW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 19 | SW 19 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 113 | 107 | 167 | 134 | 96 | 155 | 108 | 168 | 113 | 248 | 173 | 309 | 230 | 261 | 367 | 220 | 217 | 211 | 183 | 156 | 180 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 1:42PM1.57m | 2:05AM0.99m | 2:35PM1.62m | 4:15AM0.85m | 3:43PM1.68m | 6:42AM0.91m | 4:59PM1.77m | 7:51AM1.04m | 6:08PM1.90m | 8:31AM1.16m | 7:08PM2.03m | 9:05AM1.27m | 8:01PM2.13m | ||||||||
Low Tide | 8:51PM0.49m | 7:43AM0.55m | 10:30PM0.39m | 8:29AM0.72m | 00:04AM0.21m | 10:07AM0.84m | 1:13AM-0.00m | 11:52AM0.85m | 2:06AM-0.19m | 1:08PM0.77m | 2:50AM-0.33m | 2:06PM0.65m | 3:31AM-0.40m | ||||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:42 | — | — | 7:40 | — | — | 7:39 | — | — | 7:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 20 | 21 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 22 |
Feels °C | 21 | 21 | 20 | 21 | 21 | 22 | 23 | 22 | 23 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 22 | 23 |
Swell 1 Height (m) Direction Period (s) | W 6 | W 6 | SW 14 | WSW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 13 |
| kJ | 17 | 17 | 167 | 134 | 96 | 155 | 108 | 168 | 106 | 136 | 103 | 309 | 230 | 261 | 367 | 220 | 217 | 211 | 183 | 156 | 180 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | W 6 | W 5 | SW 11 | W 5 | WNW 5 | WNW 5 | SW 18 | SSW 19 | SW 19 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | SW 20 | SW 20 | SW 19 |
| kJ | 113 | 107 | 15 | 8 | 20 | 8 | 8 | 9 | 113 | 248 | 173 | 92 | 69 | 90 | 69 | 42 | 43 | 30 | 63 | 134 | 133 |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | S 9 | SSW 12 | S 9 | S 9 | SW 20 | SW 20 | WNW 5 | W 5 | S 9 | W 4 | W 4 | S 9 | W 4 | W 4 | SW 21 | W 5 | W 8 | SW 16 | W 10 |
| kJ | 53 | 69 | 6 | 15 | 6 | 6 | 60 | 64 | 5 | 4 | 6 | 3 | 3 | 6 | 3 | 3 | 72 | 4 | 11 | 39 | 30 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 5 | — | — | — | — | — | WNW 5 | — | — | W 4 | — | — | W 4 | — | — | W 8 | — |
| kJ | — | — | — | — | 8 | — | — | — | — | — | 5 | — | — | 3 | — | — | 3 | — | — | 10 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 14 | 15 | 15 | 14 | 15 | 15 | 15 | 64 | 15 | 14 | 15 | 15 | 8 | 153 | 62 | 8 | 8 | 62 | 8 |
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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