Surf Forecasts:
Diamond Beach surf forecast from 29 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 11PM (local time) - 3.5ft (1.0m), 10s period, SE swell with 185 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 1.0m 10s and forecast to arrive on Wednesday (Sep 02) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Aug 29) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 2nd Sep) | 3.5ft (1.0m) 10s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Howdy, Rusty here. I’ve run the numbers for Diamond Beach through the next 16 days, and honestly, there’s not a single wave worth chasing. The whole outlook is a flat, weak, and messy mess. Don’t waste your time.
We’re looking at a pittance of swell the entire stretch. Day in and day out, it’s 0.7ft to 2ft of mostly SE swell, with periods all over the shop—short, lumpy 4 to 7 seconds for the most part, though a groundswell pulse shows up on September 9th with a 12-second period. But even then, the swell height tops out at 1ft to 4ft, and the combined energy tops out at 331, which is moderate at best. That energy arrives in the afternoon of the 9th, but it’s SSE and hitting a cross-onshore wind. Not clean.
The first possible surf kicks off Saturday, August 29th, but it’s a tiny 1ft from the SE at 8 seconds with a cross-shore breeze. Just poor. The whole first week is a slog of tiny swell and poor wind. Monday afternoon August 31st goes glassy with a light WSW wind and 1ft of swell, but there’s no power. The best wind day—Thursday afternoon September 3rd with a gentle offshore NW breeze and clean conditions—only has 2ft of SE swell at 6 seconds. Not enough to bend a rail.
Later on, Monday September 7th gives us 2ft of SSE at 5 seconds with glassy, calm conditions. Still tiny and messy. Then Wednesday September 9th brings that longer-period SE groundswell (12 seconds), but it’s only 1ft in the morning, building to 4ft in the afternoon out of the SSE. The wind is cross-onshore from the SSE, so it’ll be choppy and bumpy. That’s the only swell that breaks 2ft, but at 4ft, it’s still small. With that onshore wind, forget about any real shape.
After that, it drops back to tiny, weak surf through to the end on September 13th.
Water temperature is about average for the time of year, nothing crazy.
There are no good surf options in this 16-day window. Diamond Beach is open to SE swell, which is all we’re getting, but the size and energy just aren’t there. Honestly, the setup looks way more fun for kite surfing than paddling out.
So keep your board in the car and wait for the next system. Forecasts change, but right now it’s a long, flat spell. Rusty out.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Warm (max 26°C on Fri night, min 20°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Tue morning. Warm (max 33°C on Thu afternoon, min 23°C on Mon night). Winds increasing (calm on Tue afternoon, fresh winds from the SSE by Wed afternoon). | ||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 4 | S 4 | SE 8 | SE 8 | SE 7 | SE 7 | SE 7 | SE 9 | SE 11 | SE 10 | ESE 6 | SE 9 | SE 6 | SE 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 26 | 16 | 16 | 17 | 18 | 13 | 30 | 10 | 9 | 8 | 7 | 18 | 50 | 58 | 80 | 33 | 24 | 16 | 11 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | cross-on | cross-on | cross-on | glassy | cross-off | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-off | off | off |
High Tide | 9:20PM1.58m | 9:43AM1.49m | 9:56PM1.56m | 10:18AM1.53m | 10:34PM1.51m | 10:57AM1.56m | 11:17PM1.44m | 11:40AM1.57m | 00:06AM1.37m | 12:30PM1.56m | 1:03AM1.30m | 1:27PM1.54m | 2:05AM1.24m | ||||||
Low Tide | 3:25AM-0.03m | 3:42PM0.06m | 4:00AM-0.04m | 4:22PM0.06m | 4:34AM-0.03m | 5:04PM0.08m | 5:09AM0.01m | 5:48PM0.12m | 5:48AM0.06m | 6:40PM0.18m | 6:35AM0.13m | 7:46PM0.24m | |||||||
 |  | |  | | |  |  |  | |  | | | | | | | | | |
 | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — |
 | 7:36 | — | 7:35 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:27 | — |
mm | 2 | — | — | — | — | — | 1 | 1 | — | 2 | 2 | 1 | 2 | — | — | — | — | — | — |
Temp °C | 26 | 21 | 23 | 23 | 23 | 25 | 25 | 23 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 31 | 33 | 30 |
Feels °C | 29 | 19 | 23 | 23 | 24 | 23 | 24 | 24 | 28 | 27 | 27 | 29 | 28 | 26 | 24 | 25 | 31 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | SE 8 | ENE 5 | SE 8 | SE 8 | — | ESE 8 | S 4 | SE 8 | SE 7 | SE 7 | SE 7 | SE 12 | SE 11 | SE 10 | ESE 6 | SE 6 | SE 6 | SE 6 |
| kJ | 26 | 16 | 7 | 17 | 18 | — | 7 | 6 | 9 | 8 | 7 | 12 | 23 | 58 | 49 | 29 | 24 | 16 | 11 |
Swell 2 Height (m) Direction Period (s) | S 5 | S 6 | SE 8 | E 5 | ENE 5 | E 6 | — | SE 8 | S 4 | S 4 | — | SE 8 | — | — | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 |
| kJ | 2 | 3 | 16 | 4 | 2 | 1 | — | 10 | 3 | 1 | — | 11 | — | — | 80 | 33 | 21 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | E 10 | E 9 | S 5 | S 5 | S 5 | E 6 | E 9 | W 3 | — | — | — | SE 13 | — | — | — | — | ENE 6 | S 4 | S 4 |
| kJ | 2 | 2 | 2 | 1 | 2 | 1 | 2 | 1 | — | — | — | 7 | — | — | — | — | 6 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | — | ENE 5 | — | — | — | SSE 4 | S 4 | — | — | — | — | SSE 7 | SE 9 | ESE 4 | ESE 5 | S 4 | W 3 | W 3 | NNW 3 |
| kJ | — | 14 | — | — | — | 13 | 30 | — | — | — | — | 18 | 50 | 13 | 16 | 6 | 3 | 6 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 201 | 210 | 376 | 323 | 325 | 153 | 32 | 323 | 1137 | 1137 | 376 | 7 | 50 | 247 | 2462 | 252 | 28 | 20 | 98 |
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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