Surf Forecasts:
Diamond Beach surf forecast from 6 Sep 2026:
- Best quality surf: Friday 11 Sep, 2AM (local time) - 4.5ft (1.4m), 6s period, S swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 11PM (local time) - 4.5ft (1.4m), 6s period, S swell with 151 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 2AM (local time) - 4.5ft (1.4m), 6s period with S 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 Friday (Sep 11) at 2AM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 0.9m and 6s. Another secondary swell of 0.1m and 10s 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 1.4m 6s and forecast to arrive on Thursday (Sep 10) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Sep 11) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 11th Sep) | 4.5ft (1.4m) 6s |
| Best Surf | 2AM (Fri 11th Sep) | 4.5ft (1.4m) 6s |
| Most Powerful | 11PM (Thu 10th Sep) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Rusty here again. Let's be real about Diamond Beach. This 16-day stretch is a dud. There's practically nothing on offer. The only time you could even think about paddling out is on Sunday, September 20th.
For the first week and a half, it's tiny and mostly windy. We see some swells over 4ft (like on the 10th), but the wind is cross-onshore or just messy. The wave energy is weak, with combined energy values mostly under 100, just occasionally touching the low hundreds like 158 on the afternoon of the 10th. But it's a bumpy, choppy mess. The water temp on the 6th is a very warm 77°F, more than 5°F above normal for this time of year, so it's a bath, but there's no surf to enjoy.
Everything changes on the morning of Sunday, September 20th. The swell is tiny, only about 1ft from the ESE with a period of 9 seconds. But the wind is glassy. Absolutely flat calm. For this location, that is the standout moment. The combined energy is still low at 65, and the report says it's "surfable waves but very ordinary conditions." That's as good as it gets here. For a long stretch of nothing, a tiny, clean, knee-high wave is the one and only highlight.
It’s a single, glassy morning in a sea of flat and choppy days. That’s your window.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Tue afternoon, min 21°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Thu afternoon, min 22°C on Wed morning). Winds decreasing (fresh winds from the SSW on Wed night, calm by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
AM | 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) | E 7 | E 7 | E 8 | ENE 7 | E 10 | E 9 | E 9 | E 9 | SSW 4 | SSW 4 | S 4 | SSW 5 | SSW 5 | S 6 | S 6 | S 6 | SE 7 | SE 5 | ESE 9 | E 5 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 8 | 18 | 9 | 29 | 15 | 6 | 6 | 13 | 8 | 36 | 94 | 74 | 102 | 148 | 19 | 7 | 7 | 8 | 21 | 39 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | cross | on | cross-off | off | cross-off | cross | cross | cross-on | cross | cross-off | cross-on | off | cross-off | cross-on | cross-on | on | on | cross-on |
High Tide | 4:46PM1.54m | 5:31AM1.29m | 5:54PM1.58m | 6:35AM1.40m | 6:54PM1.65m | 7:30AM1.51m | 7:47PM1.69m | 8:19AM1.60m | 8:34PM1.70m | 9:05AM1.66m | 9:19PM1.66m | 9:48AM1.68m | 10:02PM1.59m | ||||||||
Low Tide | 10:14AM0.20m | 11:20PM0.12m | 11:20AM0.13m | 00:15AM0.03m | 12:19PM0.05m | 1:06AM-0.05m | 1:14PM-0.01m | 1:54AM-0.11m | 2:06PM-0.06m | 2:39AM-0.14m | 2:56PM-0.07m | 3:22AM-0.13m | 3:42PM-0.05m | 4:02AM-0.08m | |||||||
 | |  | |  | | | |  | | | | | | | | | | |  |  | |
 | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:14 | — | — | 7:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 |
Temp °C | 23 | 23 | 22 | 22 | 23 | 23 | 22 | 25 | 24 | 24 | 26 | 24 | 26 | 29 | 26 | 24 | 25 | 25 | 24 | 25 | 27 |
Feels °C | 22 | 22 | 21 | 21 | 23 | 22 | 22 | 24 | 23 | 22 | 23 | 21 | 24 | 28 | 24 | 24 | 27 | 25 | 24 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 8 | ENE 7 | E 10 | E 9 | E 9 | SE 8 | SE 9 | SE 8 | E 9 | SE 9 | SE 9 | S 6 | S 6 | S 6 | SE 7 | ENE 4 | SSE 6 | ESE 9 | ESE 10 |
| kJ | 4 | 8 | 18 | 9 | 29 | 15 | 6 | 3 | 3 | 3 | 2 | 3 | 3 | 47 | 62 | 19 | 7 | 4 | 4 | 8 | 9 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | E 10 | SE 8 | E 4 | SE 8 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ESE 9 | SE 10 | SE 10 | S 6 | SE 5 | ESE 9 | SE 6 | S 6 |
| kJ | 3 | 3 | 3 | 8 | 3 | 2 | 3 | 6 | 1 | 1 | 6 | 2 | 2 | 8 | 4 | 4 | 5 | 7 | 8 | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | S 6 | S 5 | E 9 | SE 9 | S 5 | SE 8 | S 5 | — | — | SE 10 | — | — | — | E 8 | — | ESE 10 | SE 10 | SE 9 | S 6 | S 6 | S 6 |
| kJ | 1 | 1 | 2 | 3 | 1 | 3 | 1 | — | — | 4 | — | — | — | 1 | — | 9 | 4 | 3 | 1 | 1 | 3 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | — | — | — | — | — | — | SSW 4 | SSW 4 | S 4 | SSW 5 | SSW 5 | S 6 | S 6 | NE 3 | ENE 4 | — | E 3 | E 5 | E 6 |
| kJ | — | 1 | — | — | — | — | — | — | 13 | 8 | 36 | 94 | 74 | 102 | 148 | 5 | 7 | — | 5 | 21 | 39 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 201 | 497 | 59 | 56 | 163 | 65 | 734 | 734 | 502 | 734 | 734 | 734 | 156 | 102 | 0 | 32 | 169 | 323 | 252 | 2613 | 28 |
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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