Surf Forecasts:
Sandy Beach surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 5PM (local time) - 7ft (2.1m), 9s period, ENE swell with 660 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 9s and forecast to arrive on Thursday (Sep 17) at 5PM. 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 | 5PM (Thu 17th Sep) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Hey, it’s Rusty. Let’s talk about Sandy Beach and the next sixteen days.
I’ll be honest – this forecast is a tough pill to swallow. From Monday the 14th of September, we are looking at a long, ugly stretch. The trades are locked in from the ENE and NE, blowing a steady 12-25 mph, and they keep that up for nearly two weeks. For a beach that’s wide open to the southeast, that constant cross-shore and cross-onshore wind just puts a stamp on everything – "poor." There’s size to be had, like Thursday the 17th with 7 ft of lumpy ENE windswell, but with the wind howling at 22 mph, it’s just a blown-out mess.
The combined energy does crank up into the strong range (968) on Wednesday the 16th, but that’s a 3 ft SSW groundswell with a very long 18-second period. That kind of period needs a perfect reef or point to shine. Here at Sandy Beach (a beach and reef set-up), with a fresh 22 mph cross-shore, that long-period energy is just gonna break straight and close out.
The water temp is a pleasant 81°F, which is totally normal for this time of year, so at least the warmest part of the day will feel nice on the walk back to the car.
The only real reason to get excited is the very end of the period. On Monday the 28th of September, the wind finally drops. We’re looking at a gentle breeze in the morning and by afternoon, it’s almost glassy with the ENE wind down to just 3 mph. The swell is still a solid 6-7 ft, which puts this firmly in expert territory, but with the wind being essentially calm, the wave quality will finally be there. It won’t be the cleanest swell (short 7-second period), but it will be ridable.
The single standout of this whole forecast is Monday afternoon, the 28th of September. It’s the only time in two weeks you won’t be fighting a gale. The combined energy is moderate (689) and the wind is light cross-shore. Keep in mind, this break sees crowds "often," so after a two-week drought, expect a full parking lot.
The takeaway? Hunker down. There’s a solid 12-day gap of onshore slop. Your one clean shot is that late Monday session on the 28th.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 25°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Thu night. Warm (max 27°C on Fri morning, min 25°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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) | NE 8 | NE 8 | NE 8 | NE 8 | SSW 19 | ENE 10 | SSW 18 | ENE 6 | ENE 7 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | E 7 | E 7 | ENE 8 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 112 | 78 | 75 | 71 | 470 | 292 | 541 | 241 | 508 | 660 | 644 | 622 | 580 | 539 | 428 | 404 | 411 | 400 | 375 | 365 |
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-on | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-on |
High Tide | 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 | 11:25AM0.57m | 11:56PM0.25m | |||||||
Low Tide | 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 | 7:13PM0.13m | 5:00AM0.13m | |||||||
 |  | | |  | | | |  |  |  | | | | | | | | | | |
 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 7 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 25 | 25 | 27 | 26 | 26 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 24 | 25 | 24 | 24 | 24 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | SW 22 | 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 | SSW 15 | SSW 15 | SSW 14 |
| kJ | 227 | 78 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 350 | 296 | 300 | 346 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 21 | ENE 8 | E 12 | E 11 | SW 12 | SW 11 | SSW 11 | SSW 20 | SSW 19 | WSW 10 | SSE 9 | SSE 7 | SSE 7 | SSW 18 | SSE 6 | SW 16 | SW 15 | SW 15 | SW 15 |
| kJ | 49 | 224 | 47 | 68 | 58 | 35 | 31 | 12 | 149 | 210 | 9 | 8 | 19 | 19 | 108 | 15 | 121 | 115 | 104 | 33 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 13 | NNE 8 | ENE 8 | SW 12 | S 9 | WSW 8 | SE 11 | SW 11 | SSE 10 | SSE 10 | W 9 | W 9 | S 20 | SSE 9 | S 18 | SSW 14 | SE 8 | W 13 | W 12 |
| kJ | 12 | 68 | 36 | 19 | 38 | 6 | 7 | 5 | 18 | 10 | 9 | 7 | 7 | 67 | 7 | 99 | 37 | 3 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | NE 8 | — | NE 8 | NE 8 | NE 5 | ENE 10 | ENE 10 | ENE 6 | ENE 7 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | E 7 | E 7 | ENE 8 | ENE 7 |
| kJ | 112 | — | 75 | 71 | 64 | 292 | 427 | 241 | 508 | 660 | 608 | 494 | 416 | 461 | 428 | 404 | 411 | 400 | 375 | 365 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 16 | 19 | 47 | 110 | 19 | 47 | 49 | 47 | 48 | 55 | 47 | 48 | 47 | 47 | 47 | 55 | 48 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Sandy Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest