Surf Forecasts:
Diamond Beach surf forecast from 13 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 5PM (local time) - 2.5ft (0.8m), 10s period, SSE swell with 118 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 10s and forecast to arrive on Wednesday (Aug 19) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Aug 15) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Wed 19th Aug) | 2.5ft (0.8m) 10s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, let’s see what’s going on at Diamond Beach. Honestly, it’s a quiet stretch to start. From Thursday morning all the way through the next week and change, the surf is mostly flat, choppy, or blown out. Not much to get excited about unless you’re just keen on a float.
Water temp is about what you’d expect for this time of year—nothing out of the ordinary.
The first little flash of hope shows up on Saturday, August 22nd, in the morning. Diamond Beach (exposed to swell from the SE) will see a small pulse of south swell around 3ft, with a short 5-second period. The energy is weak (77). The big win here is the wind: dead calm and glassy. That’s about as clean as it gets. The waves themselves are nothing special, just surfable. Since this break is inconsistent and beginner-friendly, and crowds are only sometimes an issue, you could have a nice, quiet session.
Looking further out, we get a couple of afternoons that start to show some real size, but they’re a week or more away. On Thursday, August 27th, the afternoon shows a solid 5-6ft swell from the east, with a 7-second period. Energy jumps to moderate (241), and a cross-offshore wind from the WSW keeps it clean. That’s a proper late-summer swell, but it’s a long-range call, so don’t book the day off yet. The size is getting into the “not for beginners” territory.
Then Friday morning, August 28th, you’ve got around 4-5ft from the east with a clean, moderate offshore wind from the NW. Energy is still solid (173). Again, it’s a ways out, but worth watching.
So the real standout is that Saturday morning on the 22nd—not for power, but for that rare glassy, clean surface at a spot that doesn’t get it often. The 27th afternoon and 28th morning are the ones with the most potential for a proper wave, but they’re a gamble this far out.
Bottom line: the first week and a half is pretty barren. The 22nd gives you a clean, tiny window, and the end of the month shows some building promise. It’s not usually this quiet for this long, so the pattern could shift.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 21°C on Fri night). Winds increasing (calm on Fri afternoon, fresh winds from the NE by Fri night). | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Sun night. Warm (max 26°C on Mon morning, min 22°C on Sat night). Winds decreasing (fresh winds from the S on Sun night, calm by Tue afternoon). | ||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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) | SSW 3 | SE 8 | E 11 | SE 8 | SE 9 | SSE 9 | S 5 | ENE 5 | E 5 | ENE 5 | S 3 | S 5 | S 7 | SSE 7 | SSE 7 | SSE 6 | SSE 9 | SE 13 | SE 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 3 | 3 | 3 | 3 | 3 | 8 | 3 | 14 | 11 | 5 | 11 | 86 | 104 | 40 | 26 | 14 | 8 | 27 | 50 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross-off | cross | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-on | off | cross-off | cross-on | cross-on |
High Tide | 8:53PM1.78m | 9:27AM1.58m | 9:41PM1.75m | 10:16AM1.61m | 10:29PM1.68m | 11:04AM1.60m | 11:16PM1.58m | 11:53AM1.57m | 00:04AM1.46m | 12:41PM1.53m | 00:53AM1.34m | 1:28PM1.47m | 1:42AM1.23m | ||||||
Low Tide | 3:07AM-0.18m | 3:14PM-0.09m | 3:53AM-0.19m | 4:04PM-0.07m | 4:35AM-0.16m | 4:51PM-0.02m | 5:15AM-0.09m | 5:37PM0.06m | 5:55AM0.02m | 6:24PM0.16m | 6:35AM0.13m | 7:14PM0.26m | |||||||
 |  |  | |  | |  | | | | | |  | |  |  | | | | |
 | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — |
 | 7:58 | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 13 | — | 4 | 5 | — | — | — |
Temp °C | 25 | 25 | 29 | 29 | 24 | 24 | 23 | 22 | 22 | 23 | 23 | 25 | 24 | 26 | 26 | 25 | 25 | 26 | 26 |
Feels °C | 25 | 25 | 30 | 30 | 22 | 25 | 23 | 20 | 21 | 23 | 22 | 22 | 22 | 30 | 28 | 28 | 28 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SE 8 | S 3 | SE 8 | S 3 | SE 7 | SSE 9 | SE 9 | SSE 6 | E 5 | ENE 5 | ENE 6 | E 5 | — | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SE 13 | SE 12 |
| kJ | 3 | 1 | 3 | 1 | 2 | 8 | 3 | 3 | 11 | 5 | 3 | 1 | — | 40 | 26 | 14 | 8 | 27 | 50 |
Swell 2 Height (m) Direction Period (s) | E 8 | SE 8 | S 5 | SE 8 | SE 9 | — | S 5 | SE 9 | SSE 6 | SE 9 | ESE 9 | NE 5 | — | — | — | SE 9 | SSE 9 | SSE 6 | SSE 6 |
| kJ | 1 | 3 | 1 | 3 | 3 | — | 2 | 3 | 4 | 3 | 7 | 1 | — | — | — | 3 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | S 5 | E 11 | S 5 | — | E 13 | — | E 12 | SE 9 | — | — | — | — | — | — | S 16 | SE 14 | NE 4 | — |
| kJ | — | 1 | 2 | 1 | — | 3 | — | 3 | 3 | — | — | — | — | — | — | 5 | 8 | 5 | — |
Wind waves Height (m) Direction Period (s) | SSW 3 | W 3 | — | — | NNE 2 | — | NW 3 | ENE 5 | — | SSE 3 | S 3 | S 5 | S 7 | WNW 3 | — | SW 2 | NE 2 | ENE 4 | — |
| kJ | 3 | 1 | — | — | 1 | — | 4 | 14 | — | 3 | 11 | 86 | 104 | 2 | — | 1 | 1 | 5 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1009 | 1135 | 273 | 2175 | 1375 | 3151 | 1136 | 1381 | 3151 | 1336 | 376 | 1397 | 23 | 2 | 98 | 85 | 75 | 28 | 20 |
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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