Surf Forecasts:
Diamond Beach surf forecast from 16 Aug 2026:
- Most powerful swell: Monday 17 Aug, 5AM (local time) - 4ft (1.2m), 5s period, S swell with 83 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 1.2m 5s and forecast to arrive on Monday (Aug 17) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Monday (Aug 17) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Mon 17th Aug) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright, let’s cut through it.
Looking at the next 16 days, honestly, it’s a long stretch of flatness around here. There’s a huge gap with nothing worth mentioning until the very end of the month.
The only break in the forecast is Diamond Beach. The water temp is about 77°, which is a touch warmer than usual for this time of year.
From Sunday the 16th right through to Thursday the 27th, it’s a write-off. Tiny swell, mostly under 3 feet, with weak, short-period energy. The wind is all over the place, mostly cross-on and onshore, making a mess. Even when the wind goes offshore or it goes glassy, there’s just no swell to work with. The wave energy is weak across this whole stretch, with readings in the teens, twenties, and thirties. Nothing to get excited about.
The first little glimmer shows up on Thursday the 27th of August. The wind is a moderate cross-offshore, keeping things smooth, and the swell bumps to about 2 feet from the SE, with a longer period of 12 seconds. That longer period gives it a little push, and the combined energy hits 106 (moderate). This one’s for the locals and the experienced guys.
The real standout, though, is Friday the 28th of August. Both the morning and afternoon look clean with fresh offshore winds from the NW at around 18 mph. The swell is small, about 2 feet from the SE, with a period of 10 seconds. The combined energy sits at 78. It’s not big, but the wind is blowing straight off the beach. This is your best shot in the whole outlook for a few clean, fun waves. You might have some company out there.
Saturday the 29th and Sunday the 30th stay clean but the swell drops off again. By Monday the 31st, the wind turns messy and onshore again.
So, a long quiet spell, with one really clean window on that Friday. If you’re after a paddle, that’s your day.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sun night. Warm (max 29°C on Mon afternoon, min 22°C on Tue morning). Winds decreasing (fresh winds from the S on Sun night, light winds from the NW by Tue night). | Days 4-6 Weather SummaryHeavy rain (total 43mm), heaviest during Fri night. Warm (max 26°C on Wed afternoon, min 19°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | SSE 3 | SSE 4 | S 5 | S 6 | S 6 | SSE 7 | SSE 7 | SE 9 | SE 11 | SE 10 | SE 9 | SE 9 | SSE 4 | ESE 8 | ESE 8 | ENE 4 | ENE 5 | ESE 8 | ESE 8 | ESE 8 | ESE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 20 | 71 | 38 | 19 | 26 | 18 | 17 | 18 | 15 | 22 | 12 | 7 | 7 | 7 | 16 | 17 | 7 | 6 | 6 | 12 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | off | off | off | off | cross-off | cross-off | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-off | cross-off | cross-on |
High Tide | 11:53AM1.57m | 00:04AM1.46m | 12:41PM1.53m | 00:53AM1.34m | 1:28PM1.47m | 1:42AM1.23m | 2:16PM1.42m | 2:32AM1.15m | 3:04PM1.37m | 3:25AM1.09m | 3:56PM1.35m | 4:23AM1.07m | 4:53PM1.35m | ||||||||
Low Tide | 5:37PM0.06m | 5:55AM0.02m | 6:24PM0.16m | 6:35AM0.13m | 7:14PM0.26m | 7:19AM0.23m | 8:13PM0.33m | 8:12AM0.32m | 9:17PM0.36m | 9:14AM0.37m | 10:19PM0.35m | 10:15AM0.37m | 11:13PM0.31m | ||||||||
 |  |  |  | |  | | | | | | |  | |  | |  |  |  | |  | |
 | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — |
mm | — | — | 7 | — | — | — | — | — | — | — | — | — | 1 | 4 | 2 | — | 2 | 34 | 5 | — | 2 |
Temp °C | 24 | 24 | 24 | 25 | 29 | 29 | 24 | 28 | 27 | 25 | 26 | 26 | 25 | 26 | 24 | 23 | 22 | 22 | 22 | 23 | 22 |
Feels °C | 24 | 21 | 21 | 26 | 30 | 32 | 26 | 26 | 26 | 26 | 26 | 26 | 30 | 31 | 25 | 20 | 20 | 24 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | NE 4 | — | SE 8 | S 6 | S 6 | SSE 7 | SSE 7 | SSE 6 | SE 11 | SE 10 | SE 9 | SE 9 | SSE 4 | SSE 5 | SSE 5 | ESE 9 | ENE 5 | E 4 | E 4 | ESE 5 | ESE 6 |
| kJ | 1 | — | 11 | 38 | 19 | 26 | 18 | 17 | 18 | 15 | 22 | 12 | 6 | 5 | 2 | 7 | 7 | 3 | 3 | 5 | 12 |
Swell 2 Height (m) Direction Period (s) | NE 4 | — | — | ESE 4 | SE 9 | — | SE 13 | SE 9 | SSE 6 | SSE 5 | — | — | ESE 8 | ESE 8 | ESE 8 | SE 6 | ESE 9 | ESE 8 | ESE 8 | SSE 6 | SSE 6 |
| kJ | 1 | — | — | 2 | 3 | — | 7 | 12 | 7 | 3 | — | — | 7 | 7 | 7 | 1 | 7 | 7 | 6 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SE 12 | — | — | — | — | E 6 | E 6 | SE 6 | — | SE 6 | SE 5 | SSE 7 | ESE 8 | ESE 7 |
| kJ | — | — | — | — | — | — | — | 5 | — | — | — | — | 1 | 1 | 1 | — | 1 | 1 | 4 | 6 | 5 |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSE 4 | S 5 | W 3 | — | — | NW 3 | — | — | — | — | S 4 | — | — | NE 2 | ENE 4 | ENE 5 | — | — | — | — |
| kJ | 3 | 20 | 71 | 3 | — | — | 1 | — | — | — | — | 10 | — | — | 1 | 16 | 17 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1183 | 1172 | 2162 | 2 | 98 | 32 | 98 | 65 | 20 | 95 | 365 | 131 | 289 | 1393 | 413 | 1009 | 1135 | 247 | 252 | 206 | 210 |
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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