Surf Forecasts:
Diamond Beach surf forecast from 15 Sep 2026:
- Best quality surf: Sunday 20 Sep, 8PM (local time) - 3ft (0.9m), 5s period, S swell with glassy winds.
- Most powerful swell: Sunday 20 Sep, 2AM (local time) - 4ft (1.2m), 7s period, E swell with 131 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 8PM (local time) - 3ft (0.9m), 5s 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 Sunday (Sep 20) at 8PM. The primary swell is predicted to be 0.9m and 5s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.4m and 7s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Diamond Beach in the next 16 days are 1.2m 7s and forecast to arrive on Sunday (Sep 20) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 20th Sep) | 3ft (0.9m) 5s |
| Best Surf | 8PM (Sun 20th Sep) | 3ft (0.9m) 5s |
| Most Powerful | 2AM (Sun 20th Sep) | 4ft (1.2m) 7s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s talk about Diamond Beach in feet and Fahrenheit.
First, the water’s sitting at about 76°F, which is noticeably warmer than usual — a couple degrees above what you’d expect for this time of year, so it feels a bit like a warm bath out there. But that’s about the only good thing.
We’ve got a long stretch of nothin’ worthwhile. The first week is dead: tiny swells, messy cross-shore winds, and just poor surf conditions day after day. You’ll see a slight window on Monday the 21st morning — clean with a light offshore breeze, but the swell is only about 2ft from the east, period around 9 seconds. Energy is low (93). It’s surfable but pretty ordinary; maybe a little ankle-snatcher for a beginner. The break is inconsistent, so you can’t count on much.
Things pick up a little around Wednesday the 23rd with a 5ft east swell, but the period drops to 6 seconds — that’s short-period junk — and the wind goes fresh cross-onshore, lumpy. The energy climbs to moderate (140), but the quality is still poor. This is more of a kitesurf setup than a paddle wave.
The only real highlight lands on Monday the 28th morning. Clean conditions with a moderate offshore from the NNW, swell at 2ft from the ESE, period stretching to 10 seconds, and energy climbing to 178 — that’s a proper moderate groundswell pulse. It’s tiny, but for Diamond Beach, it’s the best you’ll see. That’s your one true standout in this 16-day stretch.
Everything else is a mess. Don’t hold your breath — the forecasts can change, and usually do. But right now, that Monday the 28th is your only bet.
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Fri morning, min 19°C on Tue afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun night. Warm (max 26°C on Fri afternoon, min 18°C on Sun night). Winds decreasing (fresh winds from the SSE on Sat night, calm by Sun night). | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 6 | E 5 | E 5 | ESE 9 | E 5 | E 7 | S 4 | S 4 | E 7 | E 7 | ESE 12 | ENE 5 | E 6 | E 7 | S 5 | S 5 | SE 9 | E 9 | ENE 4 | ENE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 20 | 8 | 7 | 8 | 7 | 10 | 18 | 17 | 8 | 6 | 14 | 25 | 40 | 131 | 43 | 34 | 12 | 73 | 20 | 47 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross | cross | cross-on | cross | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | glassy | cross-on |
High Tide | 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 | 4:13PM1.31m | 4:49AM1.10m | 5:10PM1.35m | ||||||||
Low Tide | 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 | 9:39AM0.43m | 10:36PM0.33m | 10:39AM0.38m | 11:25PM0.26m | |||||||
 |  | | |  | | | |  |  | | | | | |  |  | | | | |
 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — |
 | 7:07 | — | — | 7:06 | — | — | 7:05 | — | — | 7:02 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 9 | — | — | — |
Temp °C | 20 | 19 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 26 | 24 | 21 | 21 | 22 | 23 | 24 | 23 | 19 | 23 | 20 |
Feels °C | 18 | 18 | 20 | 19 | 20 | 21 | 21 | 20 | 26 | 27 | 25 | 19 | 18 | 19 | 22 | 27 | 27 | 21 | 26 | 20 |
Swell 1 Height (m) Direction Period (s) | E 6 | E 5 | E 5 | E 5 | E 5 | E 7 | E 8 | E 7 | S 4 | E 7 | ESE 7 | SE 12 | NE 6 | E 7 | E 7 | E 7 | SSE 4 | SSE 4 | SE 9 | ESE 8 |
| kJ | 20 | 8 | 4 | 4 | 5 | 10 | 10 | 9 | 3 | 4 | 5 | 21 | 25 | 131 | 35 | 23 | 6 | 4 | 13 | 6 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SE 9 | ESE 9 | SE 9 | SE 13 | SE 12 | SE 12 | E 7 | S 4 | ESE 12 | — | ESE 12 | ESE 11 | SE 11 | SE 11 | ESE 6 | SE 11 | ESE 8 | SSE 5 |
| kJ | 8 | 8 | 3 | 8 | 3 | 7 | 6 | 6 | 8 | 1 | 14 | — | 13 | 12 | 5 | 18 | 6 | 5 | 7 | 3 |
Swell 3 Height (m) Direction Period (s) | — | SE 14 | SE 14 | SE 13 | SE 13 | SE 9 | SE 9 | SE 9 | SE 12 | SE 12 | — | — | ESE 8 | — | — | — | SE 9 | ESE 11 | S 4 | SE 8 |
| kJ | — | 8 | 7 | 7 | 7 | 3 | 3 | 3 | 6 | 6 | — | — | 7 | — | — | — | 12 | 11 | 1 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSW 3 | SW 3 | S 4 | S 4 | — | E 3 | NE 4 | ENE 5 | E 6 | SE 7 | S 5 | S 5 | S 4 | E 9 | ENE 4 | ENE 6 |
| kJ | — | — | — | — | 3 | 2 | 18 | 17 | — | 2 | 2 | 25 | 40 | 131 | 43 | 34 | 9 | 73 | 20 | 47 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 3151 | 635 | 513 | 1166 | 502 | 325 | 548 | 299 | 289 | 323 | 419 | 497 | 227 | 502 | 242 | 7 | 56 | 0 | 2 | 79 |
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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