Diamond Beach Surf Break

Lat Long: 38.96° N 74.85° W

Diamond Beach Surf Forecast and Surf Report

Issued: 1 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Diamond Beach sea temperature is
24.8° C
1.3° 

Diamond Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Diamond Beach surf forecast from 17 Aug 2026:

  • Most powerful swell: Wednesday 19 Aug, 2AM (local time) - 1.5ft (0.5m), 11s period, SE swell with 56 kJ wave energy.

Best Forecast Surf Conditions for Diamond Beach this week:

The most powerful waves expected at Diamond Beach in the next 16 days are 0.5m 11s and forecast to arrive on Wednesday (Aug 19) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Aug 18) at 5AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Wed 19th Aug)1.5ft (0.5m) 11s

Table - best surf conditions forecast for Diamond Beach over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s be straight with you – this outlook for Diamond Beach is a tough one. We’re looking at a long, drawn-out run of tiny, weak surf and challenging conditions. There’s no real stand-out session in the whole 16-day window, but we’ll walk through what’s on offer.

The first surf we can talk about is on Monday afternoon, August 17. It’s tiny, with a 1ft swell from the SSE, but the wind is a gentle cross-offshore from the WNW, so it’s clean. The energy is weak (15), and the period is short at 5 seconds, so it’s just small, weak lumps. Water temp is 77°, which feels a touch warmer than normal for this time of year.

Moving through the week, it’s more of the same. Tuesday morning August 18 sees similar 1ft SSE swell with light cross-off winds, still clean but tiny. Tuesday afternoon gets a bit of onshore wind, so it gets messy. Wednesday August 19 has a 1ft SE swell with a slightly longer 10-second period, but the wind is cross-offshore in the morning (clean) and then turns cross-onshore in the afternoon, making it choppy.

Thursday August 20 is smaller again – 0.7ft – with onshore winds and a risk of thunderstorms. Friday August 21 offers a slight bump: morning has 1ft SSE swell with cross-off wind, and the afternoon jumps to 3ft from the ENE, still cross-off and clean. The energy is still weak (33), but it’s the biggest swell we see in the first week. That afternoon window on Friday 21 is probably the best of the early period, but it’s still very ordinary.

Then we hit a rough patch. Saturday August 22 through to Sunday August 30 sees stronger winds, mostly cross or cross-shore, with swell staying between 0.7ft and 3ft. On Saturday 22, winds hit 19 mph from the NE, creating lumpy cross-chop – not good. Sunday August 23 afternoon goes glassy with 2ft S swell, but it’s still weak. Monday August 24 morning is clean with 2ft SSE swell and offshore wind, but again, tiny.

There’s a slight uptick on Thursday August 27: the swell builds to 2ft from the SE with a moderate 11-12 second period, and the energy hits moderate (153). Winds are cross-offshore and clean. This is the strongest energy we see, but the wave height is still small. Still, for an experienced surfer, it might offer a few better-shaped lines, though the period means longer gaps between sets. This is the closest we get to a highlight, but it’s not a standout by any stretch.

Friday August 28 morning is the only session with a rating of “surfable waves but very ordinary conditions” – that’s the best rating in the whole run. 1ft SE swell, 10-second period, moderate offshore wind from the NW, and clean. But the energy is still weak (68). The afternoon gets a fresh offshore wind at 19 mph, which is too strong for the tiny waves.

From Saturday August 29 through to Tuesday September 1, it’s back to tiny 1.0-1ft swell with fresh cross-shore winds and lumpy conditions. There’s a gap of several days with no real recommendation – from around August 24 to August 26, and again from August 29 onward.

Bottom line: this is a lean run. Diamond Beach is an exposed spot, but the swell just isn’t delivering. The best chance for a surf is Friday August 21 afternoon (3ft, clean) or Thursday August 27 (2ft, cleaner energy). For beginners, it’s mostly safe because the swell never goes over 5ft, but it’s barely worth paddling out. Honestly, the set-up looks more interesting for kite surfing than paddle surfing on many of those windy days. Forecasts can change, but right now, it’s a waiting game.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Mon night. Warm (max 29°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 15mm), heaviest on Fri morning. Warm (max 27°C on Thu afternoon, min 20°C on Fri night). Mainly fresh winds.

Mon
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSE
5
0.3
SE
9
0.4
SSE
6
0.3
SE
9
0.5
SE
11
0.4
SE
10
0.4
SE
9
0.3
SE
9
0.2
ESE
8
0.2
ESE
8
0.7
S
4
0.2
ESE
9
0.8
ENE
4
0.6
ENE
6
0.8
ENE
5
0.6
ENE
6
0.8
ENE
6
0.4
ENE
5
0.5
S
6
0.6
S
6
Wave Graph
Metric surfscale
Energy kJ
9
13
16
12
56
34
22
12
7
7
16
7
19
27
32
25
34
8
18
26
Wind (km/h)
15
WNW
10
WSW
5
N
10
SSE
5
WSW
10
W
15
SSW
10
SW
10
S
15
S
10
WSW
10
WSW
15
N
25
NNE
30
NE
30
ENE
25
NE
15
NE
0
ESE
10
NNW
Wind State
cross-off
cross-off
cross-off
on
cross-off
cross-off
cross-on
cross
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross
glassy
cross-off
High Tide
00:53AM1.34m
1:28PM1.47m
1:42AM1.23m
2:16PM1.42m
2:32AM1.15m
3:04PM1.37m
3:25AM1.09m
3:56PM1.35m
4:23AM1.07m
4:53PM1.35m
5:24AM1.09m
5:49PM1.39m
Low Tide
6:24PM0.16m
6:35AM0.13m
7:14PM0.26m
7:19AM0.23m
8:13PM0.33m
8:12AM0.32m
9:17PM0.36m
9:14AM0.37m
10:19PM0.35m
10:15AM0.37m
11:13PM0.31m
11:10AM0.33m
00:01AM0.25m
clear
rain showers
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
thunderstorm
rain showers
part cloud
part cloud
cloud
cloud
light rain
light rain
thunderstorm
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:15
6:16
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:52
7:50
7:49
7:47
7:45
7:45
7:43
 mm
4
3
3
4
3
2
3
11
Temp °C
29
29
26
27
26
26
28
28
26
27
27
24
26
22
21
22
22
23
24
22
Feels °C
30
31
30
30
28
27
29
29
28
29
29
27
28
20
19
20
21
25
28
25
  • Map Icons:
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  • 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 Beach Surf forecast

The above surf forecast table for Diamond Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Diamond Beach can be found by selecting the local surf guide option on the grey menu. Our Diamond Beach 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 Beach) 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 Beach 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 Beach is 43 km (27 miles) from Ocean City. If you plan a vacation in New Jersey, look for hotels and other accommodation in Ocean City. Ocean City has rooms for a wide range of budgets as well as car hire and transport links.

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