
Surf Forecasts:
Sandy Beach surf forecast from 14 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 2PM (local time) - 7ft (2.1m), 10s period, ENE swell with 811 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 2.1m 10s and forecast to arrive on Thursday (Sep 17) at 2PM. 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 18s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – the next sixteen days are a tough watch for Sandy Beach. We’re looking at a long stretch of poor conditions, so let’s break it down.
The honest truth is there’s no real surf on offer for a good while. The whole forecast period is plagued by strong, cross-shore winds from the ENE and NE, which are just trashing any potential. Combined swell energy starts off weak – around 86 – and builds quickly into the hundreds, but the wind and chop are relentless, making it all a messy, lumpy cross-chop. From September 14th through the 24th, it’s a write-off: poor surf conditions, zero scores, and a mix of fresh breezes and lumpy water. You’ll see swell heights around 1 ft to 2 ft early on, but even when it pushes up to 4 ft by the 16th, the 19 mph winds just turn it into a washing machine. By the 17th and 18th, we’ve got 7 ft swell with an 8-second period, but it’s still poor. The water temp is about average for this time of year, so at least that’s not an issue.
The only faintest glimmer comes right at the end. On September 25th, the swell drops back to 3 ft but with a very long 15-second period from the SSW. The wind is still cross and fresh at 22 mph. The combined energy reads at 569 – moderate – but the problem remains the same: that cross-shore wind will mess with the face of any wave, especially a long-period groundswell like this that would usually favour a point or reef. At a beach and reef setup like this, the long period might make it break a bit too straight. Still, it’s the only session that even gets a mention, with a score of 1 out of 10 and described as "marginal". If you’re desperate, it’s the only time it’s even worth a look, but don’t expect much. A couple of days later, on the 28th, another 3 ft SSW groundswell rolls in, but same story – lumpy cross-shore wind.
It’s a frustrating outlook. For the entire first week and a half, the conditions are so consistently poor that you’d be better off saving your energy. The only time the weather clears up, the wind is still ruining it. With such persistent onshore and cross-shore winds, the whole setup looks more interesting for a kite surfer than a paddle surfer for most of this period. Keep an eye on the forecasts, but honestly, nothing is standing out. The long-range call for the 25th is promising in terms of swell, but don’t hold your breath on the wind cleaning up.
Stay frosty,
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Mon morning, min 25°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Thu night. Warm (max 27°C on Fri morning, min 26°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | NE 9 | NE 8 | NE 8 | SSW 13 | E 12 | NE 8 | SSW 19 | ENE 10 | SSW 18 | ENE 7 | ENE 8 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | ENE 8 | ENE 8 | E 8 |
Wave Graph | |||||||||||||||||||
79 | 58 | 54 | 68 | 46 | 99 | 470 | 331 | 541 | 374 | 525 | 637 | 644 | 622 | 580 | 539 | 473 | 449 | 581 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-on |
High Tide | 5:15AM0.59m | 4:37PM0.37m | 6:02AM0.58m | 5:04PM0.30m | 6:56AM0.56m | 5:30PM0.25m | 8:04AM0.54m | 6:18PM0.21m | 9:21AM0.54m | 9:37PM0.19m | 10:30AM0.55m | 11:10PM0.22m | |||||||
Low Tide | 10:34PM0.05m | 11:57AM0.20m | 10:58PM0.06m | 1:10PM0.23m | 11:24PM0.09m | 2:59PM0.23m | 11:56PM0.11m | 5:49PM0.21m | 00:44AM0.14m | 6:28PM0.17m | 2:11AM0.15m | 6:51PM0.15m | 3:49AM0.15m | ||||||
— | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:35 | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 12 | — | — | 2 | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 25 | 26 | 26 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 8 | NE 8 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
79 | 58 | 54 | 31 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 273 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 14 | SW 22 | SW 21 | NNE 8 | E 12 | NNE 8 | SW 12 | SW 11 | SSW 11 | SSW 20 | SSW 19 | SSE 10 | SSE 9 | SSE 6 | SSE 7 | SSW 18 | SSE 6 | SW 16 |
38 | 49 | 227 | 224 | 24 | 68 | 22 | 35 | 43 | 12 | 149 | 210 | 9 | 8 | 15 | 15 | 108 | 15 | 122 | |
Swell 3 Height (m) Direction Period (s) | ENE 8 | SW 23 | SW 14 | SSW 13 | E 12 | SW 12 | E 11 | S 9 | S 8 | SSE 11 | SW 11 | SSE 10 | WSW 10 | W 9 | W 9 | S 20 | SSE 6 | S 18 | SSW 14 |
14 | 86 | 49 | 68 | 46 | 38 | 58 | 6 | 5 | 12 | 18 | 10 | 9 | 2 | 7 | 67 | 12 | 99 | 37 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 5 | ENE 4 | ENE 5 | ENE 5 | NE 8 | ENE 5 | ENE 10 | ENE 6 | ENE 7 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 |
8 | 28 | 26 | 37 | 37 | 99 | 66 | 331 | 181 | 374 | 525 | 637 | 608 | 472 | 383 | 496 | 473 | 449 | 581 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 19 | 16 | 16 | 16 | 16 | 47 | 20 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 42 | 18 | 57 | 49 | 47 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy 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 (Sandy 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 Sandy 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.
Sandy's Beach is 15 km (9 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.










