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Surf Forecasts:

Diamond Street surfForecast / CAL – San Diego County / USA

information circle12 Day Weather and Surf, issued 4 am Wednesday 17 Sep 2025 PDT
Forecast update in hr  min  s Forecast update imminent
Diamond Street surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Diamond Street sea temperature is
20.9° C
 (Which is 1.0°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Diamond Street this week:

The surf forecast for Diamond Street over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 17) at 11AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.4m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Diamond Street in the next 12 days are 0.9m 15s and forecast to arrive on Wednesday (Sep 17) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11AM (Wed 17th Sep)3ft (0.9m) 15s
Best Surf11AM (Wed 17th Sep)3ft (0.9m) 15s
Most Powerful 8AM (Wed 17th Sep)3ft (0.9m) 15s

Table - best surf conditions forecast for Diamond Street over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 9mm), mostly falling on Wed night. Warm (max 23°C on Thu morning, min 20°C on Wed morning). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Mon morning, min 20°C on Sat morning). Wind will be generally light.

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
1
1
0
0
2
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
SSW
0.9
SSW
0.8
SSW
0.8
SSW
0.8
SSW
0.6
SSW
0.6
SSW
0.6
SW
0.5
S
0.5
S
0.5
SSW
0.4
SSW
0.5
SW
0.5
SW
0.5
SW
0.4
SW
0.4
SW
0.5
SW
0.8
SW
0.6
SW
0.8
SW
Period(s) (?)151515141414131313131313121414121716161514
Wave
Graph
(?)Metric surfscale
Energy kJ (?)3533442422642571451411098687935574959653107127306186251
Wind
(km/h)
5
N
10
NW
10
NNW
15
SSW
15
SSW
5
SW
10
W
10
WNW
10
NNW
15
NW
15
WNW
10
NW
20
W
20
WNW
15
NW
10
WNW
10
NW
10
WNW
15
WNW
15
WNW
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		crosscrosscross-
on		cross-
on		glassoncross-
on		crosscross-
on		cross-
on		crossoncross-
on		crosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
8:04AM
1.37
7:03PM
1.80
8:30AM
1.47
7:49PM
1.84
8:54AM
1.55
8:30PM
1.83
9:17AM
1.62
9:06PM
1.77
9:39AM
1.67
9:41PM
1.67
10:00AM
1.71
10:14PM
1.55
10:21AM
1.72
10:49PM
1.40
Low Tide
/ height (m)
1:24PM
0.70
2:20AM
-0.13
2:09PM
0.54
2:52AM
-0.11
2:48PM
0.40
3:20AM
-0.05
3:24PM
0.30
3:45AM
0.05
3:58PM
0.22
4:07AM
0.16
4:32PM
0.19
4:28AM
0.30
5:06PM
0.18
4:47AM
0.44
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Sunrise6:33--6:33--6:35--6:35--6:35--6:35--6:37--
Sunset-6:52--6:51--6:50--6:47--6:46--6:45--6:44-
cloud
cloud
rain showers
rain showers
clear
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
--63-----------------
Temp. °C222222232322222221222220222222232322222221
Feels °C (?)232222242324232322232221222223242322222121
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for CAL - San Diego County

  1. weather stationWind Update Continuing clean conditions at Diamond Street (calm at La Jolla- CA 8 km from Diamond Street). 0.6m 16s long period groundswell from the SSW with a 0.5m 4s local chop from the W and a 0.4m 12s groundswell from the SSW as well as a 0.3m 8s swell, also from the SSW. 4 swells combining to make bigger set waves.

    48 minutes ago Diamond Street
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Actual: 48 min ago

4 km/h
NNE
Clean
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Diamond Street surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Diamond Street at:
surf-forecast.com

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 12 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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