Surf Forecasts:
Diamond Beach surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 5AM (local time) - 3ft (0.9m), 5s period, SE swell with offshore winds.
- Most powerful swell: Sunday 13 Sep, 2AM (local time) - 4ft (1.2m), 5s period, SSE swell with 78 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 5AM (local time) - 3ft (0.9m), 5s 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 Sunday (Sep 13) at 5AM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.3m and 10s. 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 1.2m 5s and forecast to arrive on Sunday (Sep 13) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Sep 14) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 13th Sep) | 3ft (0.9m) 5s |
| Best Surf | 5AM (Sun 13th Sep) | 3ft (0.9m) 5s |
| Most Powerful | 2AM (Sun 13th Sep) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s break down Diamond Beach for the next couple weeks.
It’s a rough start. From Friday the 11th through Tuesday the 16th of September, we’ve got nothing but tiny, crummy waves – 0.3 to 0.9 feet of onshore junk. Wind all wrong, surf poor. Big gap before anything decent.
Sunday morning the 13th offers a small window – 1 feet from the SE with a 10-second period, light west cross-off breeze. Water temp about normal for this time of year. Combined energy weak (80). It’s knee-high at best, but at least it’s clean.
Monday afternoon the 14th goes glassy – northwest wind 3 mph, but only 1 foot from the SE. Still, poor conditions overall.
First real standout is Saturday the 19th of September. Morning shows a clean offshore NW breeze at 3 mph, swell 3 feet from the east, 8-second period. Combined energy moderate (120). The spot is inconsistent, so you’ll be waiting, but with that offshore wind it’ll be the cleanest we see. Crowds possible.
From Monday the 22nd, swell builds to 4 feet from the east with an 8-second period, but winds turn fresh cross-onshore, making it lumpy. Combined energy moderate (149 to 157). By Wednesday the 23rd, energy jumps to strong (296 to 308), but with strong cross-shore winds it’s better for kite surfing.
Last look is Saturday the 26th of September. Clean WNW cross-off breeze 18 mph, swell 3 feet from the ESE, 11-second period. Combined energy strong (203). Swell direction isn’t ideal, and it’s a long way out – interesting but uncertain.
Best on offer: Saturday the 19th of September morning, Diamond Beach. Small, but clean.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sat afternoon. Warm (max 29°C on Thu night, min 22°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sun night, min 21°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 10 | SE 9 | SE 9 | SE 9 | SE 4 | SE 4 | SSE 5 | SE 10 | ESE 5 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 4 | ESE 6 | ESE 7 | ESE 7 | ESE 6 | ESE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 14 | 13 | 12 | 12 | 16 | 34 | 78 | 33 | 19 | 13 | 21 | 13 | 12 | 11 | 48 | 36 | 26 | 12 | 18 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | on | on | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:34PM1.70m | 9:05AM1.66m | 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 | ||||||
Low Tide | 2:39AM-0.14m | 2:56PM-0.07m | 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 | |||||||
 |  | | |  |  |  |  |  |  | | | | | | | | | | |
 | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — |
 | 7:15 | — | 7:14 | — | — | 7:13 | — | — | 7:10 | — | — | 7:09 | — | — | 7:07 | — | — | 7:06 | — |
mm | — | — | — | — | — | 2 | 7 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 24 | 23 | 24 | 24 | 24 | 26 | 23 | 27 | 27 | 24 | 25 | 24 | 23 | 22 | 21 | 21 | 22 | 22 |
Feels °C | 31 | 21 | 21 | 24 | 23 | 23 | 26 | 25 | 29 | 29 | 22 | 25 | 23 | 22 | 20 | 18 | 20 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | SSE 5 | SSE 6 | S 6 | E 4 | — | — | E 8 | SE 10 | ESE 5 | ESE 6 | SE 9 | SE 9 | SE 9 | — | — | ESE 7 | ESE 7 | ESE 6 | ESE 7 |
| kJ | 9 | 13 | 6 | 3 | — | — | 1 | 15 | 19 | 12 | 21 | 13 | 12 | — | — | 36 | 26 | 12 | 18 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 9 | SE 9 | SE 9 | — | — | E 8 | SE 10 | SE 10 | SE 9 | ESE 5 | ENE 4 | S 5 | E 15 | E 15 | SE 14 | SE 13 | SE 9 | SE 13 |
| kJ | 14 | 12 | 12 | 12 | — | — | 1 | 33 | 14 | 13 | 6 | 3 | 1 | 4 | 4 | 8 | 7 | 3 | 7 |
Swell 3 Height (m) Direction Period (s) | SE 10 | — | E 8 | S 5 | — | — | — | — | S 4 | S 5 | S 5 | ESE 5 | E 5 | SE 15 | — | — | — | SE 8 | — |
| kJ | 4 | — | 1 | 2 | — | — | — | — | 1 | 2 | 2 | 3 | 1 | 8 | — | — | — | 2 | — |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | E 4 | SSE 3 | SE 4 | SE 4 | SSE 5 | ESE 5 | — | SW 2 | NNE 3 | — | ENE 4 | ESE 4 | ESE 6 | — | — | — | S 3 |
| kJ | — | 7 | 9 | 1 | 16 | 34 | 78 | 32 | — | 1 | 3 | — | 6 | 11 | 48 | — | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 85 | 318 | 1011 | 323 | 1172 | 1172 | 7 | 0 | 28 | 32 | 210 | 119 | 556 | 1001 | 1375 | 2162 | 597 | 597 | 59 |
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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