Diamond Street surfForecast / CAL – San Diego County / USA

information circle12 Day Weather and Surf, issued 9 pm Sunday 21 Dec 2025 PST
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
16.8° C
(Which is 1.6°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 Monday (Dec 22) at 7PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.3m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Diamond Street in the next 12 days are 2.1m 12s and forecast to arrive on Friday (Dec 26) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (PST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Mon 22nd Dec)2ft (0.6m) 10s
Best Surf 7AM (Sat 27th Dec)5ft (1.5m) 11s
Most Powerful 1PM (Fri 26th Dec)7ft (2.1m) 12s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 40mm), heaviest during Wed morning. Very mild (max 18°C on Tue night, min 14°C on Sun night). Winds increasing (calm on Mon afternoon, strong winds from the SSE by Wed morning).

Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Fri morning. Very mild (max 19°C on Thu morning, min 14°C on Fri night). Wind will be generally light.

Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sun
28
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
1
0
0
2
2
1
2
3
1
2
2
0
Swell
Height Map
Wave Height (m) & direction (?)
0.7
W
0.6
W
0.6
W
0.7
W
0.6
W
0.6
W
0.4
SW
2.4
SSW
2.2
SSW
1.8
SSW
1
WSW
0.9
WSW
1.6
WSW
1.8
WSW
1.9
WSW
1.7
W
1.5
W
1.2
W
1.3
W
1
W
0.6
W
Period(s) (?)1111101099157888811111111111012109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1168278966459626376513981258353177896170751731345418860
Wind
(km/h)
10
NNW
10
NW
5
NW
5
SW
20
S
20
S
25
SE
45
SSE
30
SSE
20
SSE
25
SSW
15
SW
15
S
25
S
15
W
10
NW
10
N
15
NW
5
NW
5
SW
10
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscross-
on
cross-
on
cross-
on
crosscross-
off
crosscrosscrosscross-
on
cross-
on
crosscrosscross-
on
crosscross-
off
cross-
on
glassglasscross-
on
High Tide
/ height (m)
10:58PM
1.09
9:29AM
1.81
11:38PM
1.09
10:05AM
1.73
12:21AM
1.12
10:44AM
1.62
1:05AM
1.17
11:32AM
1.45
1:52AM
1.26
12:35PM
1.25
2:39AM
1.38
2:06PM
1.05
3:26AM
1.53
3:54PM
0.94
Low Tide
/ height (m)
3:30AM
0.76
5:17PM
-0.18
4:09AM
0.78
5:54PM
-0.12
4:58AM
0.80
6:32PM
-0.04
6:04AM
0.82
7:12PM
0.06
7:32AM
0.79
7:55PM
0.19
9:12AM
0.66
8:42PM
0.32
10:40AM
0.43
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sun
28
Sunrise-6:47--6:48--6:48--6:48--6:48--6:48--6:50-
Sunset--4:46--4:46--4:47--4:47--4:49--4:50--4:50
part cloud
part cloud
part cloud
cloud
cloud
part cloud
rain showers
heavy rain
rain showers
thunderstorm
rain showers
part cloud
rain showers
light rain
light rain
part cloud
clear
clear
clear
part cloud
clear
Rain (mm)
------631373-241------
Temp. °C151616161717181617181918171717151515151414
Feels °C (?)14161617151513912151617161315121212121312
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 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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