Surf Forecasts:
Diamond Beach surf forecast from 25 Aug 2026:
- Best quality surf: Monday 31 Aug, 8PM (local time) - 1ft (0.3m), 17s period, SE swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 8PM (local time) - 3.5ft (1.1m), 6s period, S swell with 77 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 8PM (local time) - 1ft (0.3m), 17s period with SE swell.
Best Forecast Surf Conditions for Diamond Beach this week:
The surf forecast for Diamond Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 31) at 8PM. The primary swell is predicted to be 0.3m and 17s period with a secondary swell of 0.3m and 7s. Another secondary swell of 0.9m and 4s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.1m 6s and forecast to arrive on Friday (Aug 28) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 29) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 31st Aug) | 1ft (0.3m) 17s |
| Best Surf | 8PM (Mon 31st Aug) | 1ft (0.3m) 17s |
| Most Powerful | 8PM (Fri 28th Aug) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, let’s get real about Diamond Beach. I’ll walk you through this stretch – it’s a bit of a waiting game.
Right now we’ve got a quiet start with barely a ripple. From Monday afternoon through the first few days, you’re looking at tiny swell, under 2ft, with short periods below 8 seconds. The energy is weak (20–96). Winds are mostly light or offshore at times, keeping things glassy or clean, but it’s not enough wave to bother with. This is really only interesting for beginners wanting to practice pop-ups on ankle-biters. It stays like this all through the end of August and into the first days of September.
Then, around Thursday the 3rd of September, things start to change – that’s over a week away. Early on Thursday morning we see a jump in swell to 6ft from the east, with a period of 7 seconds. Combined energy climbs to 640 – that’s moderate to strong. The wind is light, cross-off from the north, so the surf is clean. It’s a notable jump, but at around 6ft, it’s getting a bit much for beginners. I’d call this the standout window if you’re an experienced surfer willing to sit on it.
Following that, Friday the 4th and Saturday the 5th of September keep that east swell at 5ft to 6ft, with periods holding around 8 seconds. The wind on Saturday morning and afternoon goes offshore from the NNW at 15 mph, keeping the waves clean and lined up. The energy remains in the moderate range (356–637). This run from Thursday to Saturday is the best you’ll see in the whole forecast – solid, rideable east swell with good offshore wind. Crowds at Diamond Beach are sometimes heavy, so expect company if you head out.
The swell tails off into the second week, dropping to 4ft on Sunday the 6th, still clean in the morning with light offshore winds. After that, we fade into smaller, choppier stuff.
One thing to note: Diamond Beach is listed as inconsistent and rarely breaks. So this east swell event is a bit of a bonus for those willing to wait. The water temperature is around 77°F – a touch warmer than normal for this time of year, which is nice for long sessions.
That’s the outlook mate. This place isn’t your everyday runner, but the window from the 3rd to the 6th of September is your best shot. Score it if you can.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Thu morning. Warm (max 26°C on Mon afternoon, min 20°C on Tue morning). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 19mm), heaviest on Thu night. Warm (max 27°C on Fri afternoon, min 22°C on Fri morning). Wind will be generally light. | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 9 | SE 9 | ESE 9 | SSE 5 | SSE 5 | ESE 9 | ESE 8 | SSE 6 | SE 8 | SE 8 | SE 7 | SE 6 | SE 8 | SSE 3 | S 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 13 | 19 | 18 | 18 | 18 | 14 | 19 | 32 | 40 | 48 | 32 | 47 | 34 | 17 | 16 | 19 | 10 | 18 | 12 | 52 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | off | off | off | glassy | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross |
High Tide | 6:42PM1.45m | 7:11AM1.22m | 7:27PM1.51m | 7:54AM1.30m | 8:07PM1.56m | 8:32AM1.37m | 8:44PM1.59m | 9:08AM1.44m | 9:20PM1.58m | 9:43AM1.49m | 9:56PM1.56m | 10:18AM1.53m | 10:34PM1.51m | |||||||
Low Tide | 00:46AM0.18m | 12:47PM0.22m | 1:29AM0.11m | 1:33PM0.16m | 2:09AM0.04m | 2:17PM0.12m | 2:48AM-0.01m | 3:00PM0.08m | 3:25AM-0.03m | 3:42PM0.06m | 4:00AM-0.04m | 4:22PM0.06m | 4:34AM-0.03m | |||||||
 |  | | | |  | |  |  | |  | |  | | | | | | | | |
 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:32 | — |
mm | — | — | — | — | — | — | — | — | 3 | 4 | 6 | — | 3 | 6 | — | — | — | — | — | — |
Temp °C | 26 | 25 | 22 | 25 | 24 | 22 | 24 | 24 | 25 | 26 | 25 | 24 | 27 | 27 | 23 | 23 | 23 | 24 | 25 | 25 |
Feels °C | 26 | 24 | 20 | 23 | 23 | 22 | 22 | 22 | 25 | 25 | 25 | 26 | 29 | 28 | 22 | 22 | 23 | 23 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SE 11 | SE 11 | SE 11 | SE 11 | SE 9 | SE 9 | ESE 9 | E 12 | E 12 | ESE 9 | S 6 | SE 8 | SSE 5 | SSE 6 | SE 7 | SE 6 | SE 8 | E 9 | ESE 8 |
| kJ | 6 | 19 | 18 | 18 | 18 | 14 | 19 | 32 | 3 | 3 | 32 | 27 | 18 | 16 | 13 | 19 | 8 | 18 | 2 | 6 |
Swell 2 Height (m) Direction Period (s) | ESE 12 | SSE 5 | SSE 5 | SSE 5 | S 4 | E 6 | E 5 | E 13 | E 12 | SE 10 | ESE 5 | ESE 8 | E 11 | SE 8 | SE 8 | S 6 | SE 8 | S 5 | E 9 | E 9 |
| kJ | 13 | 3 | 2 | 2 | 1 | 1 | 1 | 4 | 3 | 15 | 11 | 47 | 2 | 17 | 16 | 2 | 10 | 2 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | E 7 | E 6 | E 6 | E 7 | E 6 | S 6 | E 14 | E 6 | — | E 12 | E 11 | E 11 | — | E 10 | E 10 | ENE 4 | — | — | — | — |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | 4 | 1 | — | 3 | 2 | 2 | — | 2 | 2 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | S 6 | S 4 | SSE 5 | SSE 5 | S 5 | — | SSE 6 | — | NNE 3 | — | — | — | SSE 3 | S 5 |
| kJ | — | — | — | — | — | — | 5 | 22 | 40 | 48 | 16 | — | 34 | — | 1 | — | — | — | 12 | 52 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 42 | 98 | 502 | 548 | 323 | 289 | 1166 | 499 | 249 | 252 | 23 | 7 | 2 | 32 | 199 | 337 | 158 | 1011 | 419 | 597 |
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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