Surf Forecasts:
Diamond Beach surf forecast from 21 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 5PM (local time) - 2ft (0.6m), 10s period, SE swell with 74 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 0.6m 10s and forecast to arrive on Thursday (Aug 27) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Aug 24) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Thu 27th Aug) | 2ft (0.6m) 10s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s have a look at what’s on offer.
Honestly, mate, it’s a quiet stretch ahead for Diamond Beach. Over the next 16 days, there are no real sessions that’ll get the heart pumping. You’re looking at tiny swell and mostly messy wind—nothing that’d make me rush to wax up. The water’s sitting at 77°, which is a touch warmer than normal for this time of year, so at least it’ll feel nice if you’re just having a paddle.
From Friday the 21st through to that final Saturday on September the 5th, it’s almost all poor surf conditions. The swell barely scrapes past 2ft on a good day, and the periods are short—mostly under 9 seconds—meaning weak, lumpy waves. The combined energy hardly ever breaks 100 (14 to 71), so there’s just no push.
There’s one spot that stands out as the best of a very quiet bunch: the morning of Wednesday the 26th of August. Early, with a glassy SSE breeze, you’ll find a tiny 1ft swell from the SE, period 11s. That’s a long-period groundswell, which gives it a bit more shape, but at that size it’s barely rideable. The combined energy is only 21 (weak). It’s inconsistent here, so you’ll be waiting, but with offshore NW winds on Tuesday the 25th morning (1ft, SE, 11s, combined energy 21) you might sneak a clean little wave. Still, nothing to write home about.
The rest of the period is plagued by onshore or cross-onshore breezes, especially from the east and southeast, which chop everything up. The break is exposed to swell from the SE, which is what we’re seeing, but the size never gets going. For beginners, the swell stays well under 5ft, so it’s safe, but there’s just no quality. Honestly, it looks more like a week to check the forecast again than to paddle out.
Rusty.
Short Range ForecastHeavy rain (total 22mm), heaviest during Sat morning. Warm (max 27°C on Sun afternoon, min 20°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Mon afternoon, min 20°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | ESE 9 | ESE 9 | E 3 | E 4 | E 4 | SE 4 | SSE 5 | SSE 6 | ESE 12 | ESE 12 | SE 11 | ESE 11 | ESE 11 | ESE 11 | SE 11 | SE 10 | SE 8 | ESE 10 | SE 10 | SE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8 | 8 | 11 | 19 | 9 | 6 | 6 | 14 | 14 | 13 | 19 | 11 | 11 | 11 | 18 | 14 | 18 | 9 | 74 | 22 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | on | glassy |
High Tide | 3:56PM1.35m | 4:23AM1.07m | 4:53PM1.35m | 5:24AM1.09m | 5:49PM1.39m | 6:21AM1.14m | 6:42PM1.45m | 7:11AM1.22m | 7:27PM1.51m | 7:54AM1.30m | 8:07PM1.56m | 8:32AM1.37m | 8:44PM1.59m | |||||||
Low Tide | 10:19PM0.35m | 10:15AM0.37m | 11:13PM0.31m | 11:10AM0.33m | 00:01AM0.25m | 12:00PM0.28m | 00:46AM0.18m | 12:47PM0.22m | 1:29AM0.11m | 1:33PM0.16m | 2:09AM0.04m | 2:17PM0.12m | 2:48AM-0.01m | |||||||
 |  |  |  |  | | | | | |  | | | |  | | | |  |  | |
 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — |
 | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — |
mm | — | — | 17 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Temp °C | 23 | 23 | 21 | 22 | 24 | 24 | 27 | 27 | 22 | 25 | 25 | 22 | 25 | 24 | 22 | 24 | 24 | 24 | 24 | 25 |
Feels °C | 25 | 25 | 22 | 21 | 27 | 25 | 25 | 26 | 19 | 21 | 23 | 19 | 23 | 24 | 23 | 23 | 22 | 23 | 23 | 26 |
Swell 1 Height (m) Direction Period (s) | ENE 6 | ENE 6 | SE 14 | SE 10 | SE 4 | SE 4 | SSE 5 | SSE 6 | SSE 6 | ESE 12 | SSE 6 | ESE 11 | ESE 11 | SSE 4 | SE 11 | SE 10 | SE 8 | ESE 7 | E 12 | SE 5 |
| kJ | 7 | 8 | 7 | 4 | 2 | 5 | 5 | 10 | 6 | 13 | 6 | 11 | 11 | 3 | 18 | 14 | 18 | 5 | 3 | 19 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | — | SE 9 | ESE 8 | ENE 4 | SE 12 | ESE 12 | ESE 12 | SSE 6 | SE 11 | S 5 | E 6 | ESE 11 | S 3 | E 15 | E 13 | ESE 10 | E 12 | SE 9 |
| kJ | 8 | 8 | — | 3 | 6 | 2 | 6 | 14 | 14 | 3 | 19 | 2 | 1 | 11 | 1 | 4 | 3 | 9 | 3 | 22 |
Swell 3 Height (m) Direction Period (s) | SSE 5 | SSE 4 | — | — | SE 13 | ESE 8 | E 7 | E 7 | E 7 | S 3 | E 6 | E 6 | E 6 | E 6 | — | E 14 | E 6 | E 12 | S 6 | E 11 |
| kJ | 2 | 2 | — | — | 7 | 6 | 4 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | — | 4 | 1 | 3 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | E 3 | E 4 | E 4 | — | WSW 3 | W 3 | WSW 3 | W 3 | WNW 3 | W 3 | SW 2 | W 2 | — | S 2 | S 3 | SSE 4 | SE 10 | — |
| kJ | — | — | 11 | 19 | 9 | — | 2 | 5 | 1 | 1 | 1 | 3 | 2 | 1 | — | 1 | 3 | 5 | 74 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 210 | 59 | 339 | 525 | 85 | 376 | 102 | 86 | 85 | 91 | 85 | 119 | 98 | 98 | 318 | 1166 | 1001 | 325 | 1166 | 2 |
Best forecast wave conditions in New Jersey | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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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