Surf Forecasts:
Diamond Beach surf forecast from 4 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 2AM (local time) - 5ft (1.5m), 6s period, SSW swell with 140 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 1.5m 6s and forecast to arrive on Thursday (Sep 10) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 10) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Thu 10th Sep) | 5ft (1.5m) 6s |
Table - best surf conditions forecast for Diamond Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this forecast is a real tough one for Diamond Beach. We’ve got a 16-day window stretching from September 4th all the way through to September 19th, and I’m looking at a whole lot of nothing. The first recommendation for surf doesn’t kick in until… well, the truth is, it never really does. There’s a massive gap of poor conditions right from the start, and it just doesn’t let up.
Right out of the gate on Friday, September 4th, we’ve got a tiny 1-foot swell from the southeast with a weak 8-second period. The combined energy is a measly 13, which is barely a ripple. The water temperature is a very unusual 77°, a full 5° warmer than normal for this time of year. Even with a clean offshore wind, the wave comment says it all: poor surf conditions. That theme runs through the whole period.
Saturday the 5th is glassy, but the swell drops to 0.7 feet. Sunday brings a messy 2 feet with gusty cross-shore winds. Monday and Tuesday stay small and weak. By Wednesday the 9th, the swell picks up to 4 feet from the south, but with a terrible 5-second period and a fresh onshore wind, it’s lumpy junk. The energy is only 73 – still weak.
Thursday the 10th has fresh offshore winds, but the swell is just 2 feet. The rest of the week and into the second week is a broken record: tiny swell, short periods, and cross-shore or onshore winds. The combined energy never breaks triple digits, staying well below 100 throughout. The biggest swell we see is 4 feet, and that’s on the 9th, but the quality is terrible. For a beginner spot, even that 4 feet would be fine, but the wind and period ruin it.
Honestly, as a surfer, I’d say pack the kite or the flat-water paddleboard. The setup at Diamond Beach is exposed to the southeast, but the wind patterns are just brutal for the little swell we get. There’s no standout session, no day to circle on the calendar. This is a blank run, and for this area, that’s not totally surprising. Forecasts can change, but right now, I’d hang the board up for a couple of weeks.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Sat morning. Warm (max 29°C on Fri afternoon, min 21°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 26°C on Wed afternoon, min 20°C on Mon morning). Winds increasing (light winds from the SE on Mon afternoon, strong winds from the SW by Wed night). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | SE 8 | SE 8 | SE 8 | ESE 8 | ESE 8 | S 6 | E 3 | E 5 | E 7 | E 8 | E 10 | E 10 | E 10 | E 10 | SSW 4 | SSW 4 | S 5 | SSW 6 | S 6 | S 6 | S 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 17 | 10 | 6 | 6 | 3 | 5 | 16 | 39 | 34 | 31 | 17 | 17 | 16 | 24 | 26 | 68 | 140 | 30 | 13 | 4 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | glassy | on | cross | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | off | off | cross-off |
High Tide | 2:29PM1.52m | 3:11AM1.21m | 3:36PM1.52m | 4:21AM1.23m | 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 | ||||||||
Low Tide | 9:04PM0.25m | 8:57AM0.23m | 10:17PM0.20m | 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 | ||||||||
 | |  |  |  |  | | |  | | | | | | | | | | | | | |
 | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — |
 | — | 7:24 | — | — | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — |
mm | — | — | 1 | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 25 | 29 | 29 | 24 | 24 | 24 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 24 | 24 | 23 | 26 | 25 | 25 | 26 | 23 |
Feels °C | 25 | 28 | 31 | 24 | 24 | 24 | 21 | 19 | 20 | 21 | 21 | 20 | 22 | 25 | 21 | 19 | 23 | 21 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | E 7 | S 6 | S 6 | SE 9 | E 7 | E 7 | E 8 | E 10 | E 10 | E 10 | E 10 | E 9 | E 9 | SE 10 | SE 9 | S 6 | S 6 | S 6 |
| kJ | 11 | 17 | 10 | 4 | 3 | 3 | 3 | 4 | 39 | 34 | 31 | 17 | 17 | 16 | 6 | 6 | 4 | 3 | 30 | 13 | 3 |
Swell 2 Height (m) Direction Period (s) | E 5 | S 5 | E 6 | ESE 8 | E 7 | E 6 | S 6 | SE 9 | SE 9 | SE 9 | SE 8 | E 5 | SE 8 | SE 9 | SE 9 | SE 9 | E 8 | E 9 | SE 9 | SE 9 | SE 10 |
| kJ | 2 | 2 | 3 | 6 | 3 | 3 | 1 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 1 | 1 | 3 | 3 | 4 |
Swell 3 Height (m) Direction Period (s) | — | E 6 | S 5 | — | ESE 8 | SE 8 | S 6 | S 6 | S 6 | S 5 | — | SE 8 | — | — | — | SE 10 | — | — | — | E 8 | E 8 |
| kJ | — | 3 | 2 | — | 6 | 2 | 2 | 1 | 1 | 1 | — | 3 | — | — | — | 4 | — | — | — | 1 | 1 |
Wind waves Height (m) Direction Period (s) | WNW 3 | WNW 3 | — | — | — | ESE 3 | E 3 | E 5 | — | — | S 2 | SW 3 | W 3 | S 3 | SSW 4 | SSW 4 | S 5 | SSW 6 | W 4 | WNW 4 | NNW 4 |
| kJ | 8 | 3 | — | — | — | 1 | 5 | 16 | — | — | 1 | 5 | 1 | 2 | 24 | 26 | 68 | 140 | 15 | 16 | 11 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 323 | 289 | 558 | 558 | 540 | 376 | 201 | 347 | 59 | 98 | 347 | 59 | 85 | 734 | 249 | 252 | 249 | 1165 | 75 | 1508 | 230 |
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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