Surf Forecasts:
Diamond Beach surf forecast from 12 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 11AM (local time) - 2.5ft (0.8m), 8s period, E swell with 82 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 0.8m 8s and forecast to arrive on Wednesday (Sep 16) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Sep 14) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Wed 16th Sep) | 2.5ft (0.8m) 8s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, Rusty here, lettin' you know what the next couple a weeks are lookin' like at Diamond Beach. To be straight with ya, it's a long, flat spell before we see anything worth paddlin' out for. For the first week and a half, there's just no energy comin' in, and the wind is mostly blowin' the wrong way or too strong. It's a real slow start.
The first hint of life doesn't show up until Thursday the 24th in the afternoon. We get a bit of a pulse from the ESE, about 3ft, but with a longer 7-second period, and the wind is crankin' offshore from the NNW at 22 mph. That should scrub the surface up nice and clean, but the wave energy is still moderate (109). It's a start, but not the standout.
The real window opens on Friday the 25th of September. This is the best stretch on offer. The swell fills in a bit more from the east at 5ft with a 7-second period, and the wind goes light offshore from the NW at 9 mph in the afternoon. The combined swell energy jumps to a healthy moderate (235), and we've got clean, gentle offshore conditions. That afternoon session is lookin' pretty damn good at Diamond Beach. It's a bit too big for the absolute beginners, but it's clean and shapin' up nicely.
Saturday the 26th morning could be the absolute pick. We get a 5ft SSE swell (east-ish direction is fine), the period bumps to 8 seconds, and the wind goes glassy—a light WSW at 3mph. The combined energy is a solid moderate 300, and it's gonna be dead calm. That is a magic window for a decent paddle. The crowd situation here is listed as "sometimes," so don't expect to be totally alone, but it won't be a zoo either. Just be aware that by the afternoon, the wind swings onshore and chops it up.
After that, it fades back down. Sunday the 27th morning still has some clean, surfable waves (3ft, 8-second period, 166 energy) but with a cross-offshore wind, it's just ordinary. The long-range call is that this is the only real pulse of swell in the entire 16-day window, so if you've got a window, Friday the 25th and Saturday the 26th are your days.
Keep your stick handy,
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Sat night. Warm (max 26°C on Sat night, min 18°C on Mon morning). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Mon night, min 18°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | SE 9 | SE 9 | SE 4 | SE 5 | SE 5 | SE 10 | SE 9 | SE 9 | SE 9 | NE 5 | ENE 6 | E 6 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 12 | 21 | 19 | 51 | 15 | 14 | 22 | 29 | 13 | 29 | 47 | 67 | 74 | 82 | 69 | 71 | 49 | 33 | 19 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | off | cross-off | glassy | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross |
High Tide | 9:19PM1.66m | 9:48AM1.68m | 10:02PM1.59m | 10:31AM1.66m | 10:45PM1.49m | 11:15AM1.60m | 11:30PM1.39m | 11:59AM1.53m | 00:18AM1.28m | 12:45PM1.46m | 1:07AM1.19m | 1:33PM1.39m | 1:59AM1.12m | ||||||
Low Tide | 3:22AM-0.13m | 3:42PM-0.05m | 4:02AM-0.08m | 4:26PM-0.01m | 4:39AM-0.01m | 5:08PM0.07m | 5:16AM0.09m | 5:51PM0.16m | 5:52AM0.20m | 6:36PM0.25m | 6:31AM0.30m | 7:28PM0.34m | |||||||
 |  |  |  |  | | |  | | | | |  | | | | | | | |
 | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | 7:14 | — | 7:13 | — | — | 7:10 | — | — | 7:09 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — |
mm | — | — | — | 10 | 4 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 23 | 26 | 23 | 26 | 26 | 22 | 24 | 22 | 20 | 20 | 19 | 19 | 20 | 20 | 21 | 22 | 22 |
Feels °C | 24 | 22 | 21 | 27 | 25 | 29 | 28 | 19 | 18 | 17 | 17 | 17 | 17 | 19 | 20 | 20 | 22 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | E 4 | SE 9 | — | — | SE 5 | SE 5 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | — | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | ESE 8 |
| kJ | 1 | 21 | — | — | 14 | 11 | 22 | 29 | 13 | 12 | 13 | — | 74 | 82 | 69 | 71 | 49 | 33 | 19 |
Swell 2 Height (m) Direction Period (s) | SSE 5 | — | — | — | SE 10 | SE 10 | ESE 5 | E 5 | ENE 5 | S 6 | E 15 | E 15 | E 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 12 | SE 13 |
| kJ | 2 | — | — | — | 15 | 14 | 5 | 2 | 4 | 2 | 4 | 4 | 4 | 7 | 7 | 7 | 7 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 9 | — | — | — | E 7 | — | S 4 | E 5 | S 5 | E 15 | SE 15 | — | — | — | — | — | — | — | SSE 4 |
| kJ | 12 | — | — | — | 1 | — | 3 | 2 | 2 | 4 | 8 | — | — | — | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | E 4 | ESE 3 | SE 4 | SE 5 | — | — | — | N 3 | NW 3 | NE 5 | ENE 6 | E 6 | — | — | — | — | — | SSE 2 | SSW 4 |
| kJ | 4 | 7 | 19 | 51 | — | — | — | 8 | 2 | 29 | 47 | 67 | — | — | — | — | — | 1 | 12 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 376 | 1144 | 419 | 85 | 32 | 59 | 65 | 210 | 289 | 597 | 210 | 734 | 8 | 5 | 8 | 144 | 95 | 502 | 50 |
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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