Surf Forecasts:
Diamond Beach surf forecast from 14 Sep 2026:
- Best quality surf: Monday 14 Sep, 2AM (local time) - 2ft (0.6m), 9s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 2AM (local time) - 4.5ft (1.3m), 5s period, ENE swell with 97 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 2AM (local time) - 2ft (0.6m), 9s 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 (Sep 14) at 2AM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.5m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.3m 5s and forecast to arrive on Monday (Sep 21) at 2AM. 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+) | 2AM (Mon 14th Sep) | 2ft (0.6m) 9s |
| Best Surf | 2AM (Mon 14th Sep) | 2ft (0.6m) 9s |
| Most Powerful | 2AM (Mon 21st Sep) | 4.5ft (1.3m) 5s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's talk about what Diamond Beach has in store for us.
Right out of the gate, the first week is a real struggle. We’re looking at a long dry spell with barely a ripple. From Monday the 14th all the way through to Saturday the 19th, the swell is tiny—nothing over 2ft—and the wind is mostly onshore or cross-shore junk. The combined wave energy is weak (between 14 and 38), so really not worth paddling for. It’s going to be a flat spell until things start to change.
We finally get a glimmer of hope on Sunday the 20th. The morning shows a 1ft SE swell with a period stretching out to 11 seconds, which is a nice long groundswell, and with a light cross-offshore breeze from the west, the conditions should be clean. The energy is still pretty weak at 60, but if you’re desperate for a longboard or a fun little foiling session, this is your window. Just keep an eye on the sky as there’s a risk of thunderstorms in the afternoon.
The real standout, and the one you’ll want to circle on the calendar, is Wednesday the 23rd of September. This is the best we’re going to see. The swell jumps to 7ft to 7ft from the east, with a clean 9-second period. The winds shift offshore from the NW and stay gentle to moderate, which means glassy, clean waves. The combined energy hits a strong 671 to 753, so there’s plenty of power. This is a proper size for experienced surfers, but beginners might find 7ft+ a bit much. Diamond Beach is exposed to this SE swell, so it should be lining up. It’s an exposed beach, so watch for those longer-period swells wanting to close out, but with clean winds, it’s definitely the pick.
The day after, Thursday the 24th, still has some size at 6ft to 8ft, but the wind swings onshore from the east and the period gets long (10 seconds), making for a lumpy, choppy mess with questionable tides. The afternoon sees the energy go through the roof (1709), but the conditions are poor.
After that, it fades out. Friday the 25th gets onshore winds with 5ft east swell, and then Saturday the 26th morning sees a cleaner window with a gentle offshore from the WNW and a 4ft, 12-second groundswell. It’s not as good as the 23rd, but with good winds and energy at 344, it could be a fun, clean session.
From the 27th onward, it drops back down to small, clean but weak surf, ending with a fresh offshore breeze and tiny 1ft waves on the 29th.
So, to sum it up: the first week or so is a write-off. The one to get excited about is Wednesday the 23rd of September—that’s your best shot at some proper, clean waves. The crowds here are sometimes, so you might have some company, but for that size and quality, it’s worth it.
Stay stoked,
Rusty
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 26°C on Sun night, min 19°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Thu afternoon, min 20°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 9 | NE 4 | ENE 5 | E 6 | E 6 | E 6 | E 6 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 12 | E 6 | ESE 8 | S 4 |
Wave Graph  | |||||||||||||||||||
 kJ | 53 | 29 | 13 | 13 | 24 | 28 | 9 | 11 | 10 | 20 | 21 | 20 | 16 | 15 | 9 | 14 | 6 | 14 | 28 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-off | cross | cross-on | cross-on | on | on | cross-on |
High Tide | 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 | 2:23PM1.34m | 2:53AM1.08m | 3:16PM1.31m | 3:49AM1.07m | ||||||
Low Tide | 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 | 7:19AM0.38m | 8:33PM0.38m | 8:27AM0.43m | 9:39PM0.38m | |||||||
 |  |  |  | | | | | | | | |  |  | | | | |  | |
 | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — |
 | 7:10 | — | 7:09 | — | — | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 26 | 22 | 24 | 22 | 21 | 21 | 20 | 20 | 20 | 21 | 21 | 22 | 22 | 22 | 21 | 21 | 21 | 22 | 24 |
Feels °C | 28 | 18 | 18 | 17 | 18 | 19 | 19 | 21 | 20 | 20 | 21 | 20 | 20 | 22 | 20 | 20 | 21 | 22 | 24 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | E 6 | E 6 | E 6 | E 6 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | ESE 7 | ESE 7 | ESE 6 | E 6 | ESE 8 | ESE 11 |
| kJ | 53 | 29 | 13 | 12 | 8 | 28 | 9 | 9 | 10 | 20 | 21 | 20 | 16 | 15 | 9 | 8 | 6 | 14 | 24 |
Swell 2 Height (m) Direction Period (s) | SE 9 | — | NE 4 | S 6 | SE 6 | SE 9 | E 7 | ESE 8 | E 8 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | ESE 12 | SE 12 | SE 12 | E 7 |
| kJ | 41 | — | 3 | 1 | 2 | 3 | 4 | 11 | 5 | 7 | 7 | 6 | 6 | 6 | 6 | 14 | 5 | 5 | 4 |
Swell 3 Height (m) Direction Period (s) | ESE 5 | ESE 5 | SSE 6 | E 15 | E 15 | SE 6 | SE 9 | SE 14 | SE 13 | ESE 13 | — | — | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | — | — |
| kJ | 2 | 2 | 3 | 4 | 4 | 2 | 3 | 7 | 7 | 17 | — | — | 3 | 3 | 3 | 3 | 3 | — | — |
Wind waves Height (m) Direction Period (s) | — | N 4 | NNW 3 | NE 4 | ENE 5 | — | — | — | — | SSE 3 | — | SSE 3 | S 3 | — | — | — | — | SSE 2 | S 4 |
| kJ | — | 9 | 4 | 13 | 24 | — | — | — | — | 1 | — | 2 | 6 | — | — | — | — | 1 | 28 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 210 | 289 | 597 | 1142 | 1135 | 502 | 1137 | 1166 | 59 | 29 | 530 | 42 | 422 | 1136 | 376 | 383 | 1172 | 1172 |
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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